.vocabulary-teaching-flow{max-width:1120px;margin-inline:auto;--lesson-purple:#5743a5;--lesson-line:var(--border,#e2e7e5)}.vocabulary-teaching-flow .vocabulary-stage-nav{position:sticky;top:0;z-index:5;max-width:none;background:var(--background,#f6f7f9);padding:10px 0;border-bottom:1px solid var(--lesson-line);margin-bottom:20px}.vocabulary-teaching-flow .vocabulary-stage-nav button{border:1px solid var(--lesson-line);border-radius:10px;line-height:1.3}.vocabulary-teaching-flow .vocabulary-stage-nav [aria-current=step]{font-weight:700;text-decoration:underline;text-underline-offset:5px}.vocabulary-teaching-flow .vocabulary-flow-grid{gap:24px;align-items:start}.vocabulary-teaching-flow .vocabulary-model{padding:22px;background:var(--surface,#fff);border:1px solid var(--lesson-line);border-radius:var(--radius,20px)}.vocabulary-teaching-flow .vocabulary-model>*+*{margin-top:10px}.vocabulary-teaching-flow .beginner-focus-word{font-size:clamp(36px,5vw,52px)!important;line-height:1.15}.word-overview-ipa{font-size:21px;color:var(--text-secondary);overflow-wrap:anywhere}.vocabulary-teaching-flow .vocabulary-model [role=status]{font-size:13px;color:var(--text-secondary)}.vocabulary-teaching-flow .vocabulary-task{padding:24px;background:var(--surface,#fff);border:1px solid var(--lesson-line);border-radius:var(--radius,20px);scroll-margin-top:100px}.vocabulary-teaching-flow .vocabulary-task h3{font-size:23px;line-height:1.4;margin-bottom:12px}.vocabulary-teaching-flow .vocabulary-task h4{margin-block:16px 8px}.vocabulary-teaching-flow .vocabulary-task p{margin-block:10px}.vocabulary-teaching-flow .grapheme-teaching[data-pronunciation-interactive=true] .grapheme-pairs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0}.vocabulary-teaching-flow .grapheme-teaching[data-pronunciation-interactive=true] .syllable-card{display:flex;flex-direction:column;gap:8px;min-width:0;max-width:none;width:auto;min-height:150px;align-items:flex-start;padding:16px;border:1px solid #ded8ec;border-radius:14px;background:#faf9fd}.vocabulary-teaching-flow .grapheme-teaching[data-pronunciation-interactive=true] .syllable-stressed{border-top:4px solid var(--lesson-purple);padding-top:13px;background:#f3effb}.syllable-card .segment-approximation{font-size:12px;font-weight:650;color:#514273}.syllable-card .segment-spelling{font-size:32px!important;line-height:1.1}.syllable-card .grapheme-sound{font-size:24px}.syllable-card .segment-audio-status{font-size:12px;color:var(--text-secondary);margin-top:auto!important}.syllable-combination{padding:12px 14px;border-left:3px solid var(--lesson-purple);background:#f8f6fc}.syllable-extra summary,.phoneme-technique summary,.teaching-sources summary{min-height:44px;cursor:pointer;align-content:center;font-weight:600}.vocabulary-teaching-flow .grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-options{flex-wrap:wrap;gap:8px}.vocabulary-teaching-flow .grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-options button{min-width:48px;min-height:48px;border:1px solid #ded8ec;border-radius:10px}.single-phoneme-options [aria-expanded=true]{outline:2px solid var(--lesson-purple);outline-offset:2px;font-weight:750}.vocabulary-teaching-flow .grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail{background:#fcfbfe;padding:18px;border-radius:14px}.phoneme-core-action{font-weight:700;color:#43317a;border-left:3px solid #7860bc;padding:8px 12px;background:#f1edf8}.phoneme-technique{border-block:1px solid #e4deed;padding-block:6px;margin-block:16px}.phoneme-technique>dl{margin-top:12px}.vocabulary-teaching-flow .vocabulary-task input.guided-letter-input{width:6.5em;text-align:center;font-size:25px;letter-spacing:.08em}.vocabulary-teaching-flow .vocabulary-task input:focus-visible{outline:3px solid var(--primary);outline-offset:3px}.vocabulary-teaching-flow button{touch-action:manipulation}.vocabulary-teaching-flow button:focus-visible,.vocabulary-teaching-flow summary:focus-visible{outline:3px solid var(--primary);outline-offset:4px}.vocabulary-teaching-flow button:hover:not(:disabled){filter:brightness(.96)}.vocabulary-teaching-flow button:disabled{opacity:.5;cursor:not-allowed}.teaching-sources{font-size:12px;color:var(--text-secondary);margin-top:16px;max-width:300px}.teaching-sources a{display:block;text-decoration:underline;padding-bottom:8px}@media(min-width:900px){.vocabulary-teaching-flow .vocabulary-flow-grid{grid-template-columns:260px minmax(0,1fr);gap:24px}.vocabulary-teaching-flow .vocabulary-model{position:sticky;top:92px;border-right:1px solid var(--lesson-line)}}@media(max-width:600px){.vocabulary-teaching-flow .vocabulary-task,.vocabulary-teaching-flow .vocabulary-model{padding:16px;border-radius:14px}.vocabulary-teaching-flow .vocabulary-flow-grid{grid-template-columns:minmax(0,1fr);gap:14px}.vocabulary-teaching-flow .vocabulary-stage-nav button{font-size:12px!important;padding:10px 2px!important}.vocabulary-teaching-flow .grapheme-teaching[data-pronunciation-interactive=true] .syllable-card{padding:12px;min-height:145px}.vocabulary-teaching-flow .vocabulary-task h3{font-size:21px}.vocabulary-teaching-flow .vocabulary-model .beginner-focus-word{font-size:38px!important}.vocabulary-teaching-flow .vocabulary-task>button{min-height:48px}.vocabulary-teaching-flow .grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail{padding:14px}}.vocabulary-teaching-flow{container-type:inline-size}@media(max-width:1199px){.vocabulary-teaching-flow{padding-bottom:env(safe-area-inset-bottom,0px)}.vocabulary-teaching-flow .vocabulary-stage-nav{top:env(safe-area-inset-top,0px)}.vocabulary-teaching-flow .vocabulary-model .beginner-focus-word{overflow-wrap:anywhere;-webkit-hyphens:auto;hyphens:auto}.vocabulary-teaching-flow .vocabulary-task{scroll-margin-block:calc(90px + env(safe-area-inset-top,0px)) 32px}.vocabulary-teaching-flow .single-phoneme-detail{max-width:100%;overflow-wrap:anywhere}.vocabulary-teaching-flow input{font-size:max(16px,1rem);scroll-margin-block:100px 100px}.vocabulary-teaching-flow input{scroll-margin-bottom:clamp(64px,20dvh,160px)}.vocabulary-teaching-flow .vocabulary-task button,.vocabulary-teaching-flow .vocabulary-task summary{min-height:44px}.vocabulary-teaching-flow .vocabulary-task{overflow:visible}}@media(min-width:601px)and (max-width:1199px){.vocabulary-teaching-flow .vocabulary-flow-grid{grid-template-columns:minmax(0,1fr)}.vocabulary-teaching-flow .vocabulary-model{position:static;padding:18px}.vocabulary-teaching-flow .grapheme-teaching[data-pronunciation-interactive=true] .grapheme-pairs{grid-template-columns:repeat(2,minmax(0,1fr))}}@container (min-width:960px){.vocabulary-flow-grid{grid-template-columns:260px minmax(0,1fr)!important}.vocabulary-flow-grid .vocabulary-model{position:sticky;top:92px}}@container (min-width:600px) and (max-width:959px){.vocabulary-flow-grid .vocabulary-model{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:20px;align-items:start}.vocabulary-flow-grid .vocabulary-model>h2{grid-column:1;grid-row:1 / span 2}.vocabulary-flow-grid .vocabulary-model>.beginner-meaning{grid-column:2;grid-row:1}.vocabulary-flow-grid .vocabulary-model>.beginner-caption{grid-column:2;grid-row:2}.vocabulary-flow-grid .vocabulary-model>.word-overview-ipa{grid-column:1;grid-row:3}.vocabulary-flow-grid .vocabulary-model>div{grid-column:2;grid-row:3}.vocabulary-teaching-flow[data-teaching-stage="3"] .vocabulary-model{display:block}}@media(max-width:600px){.vocabulary-teaching-flow .vocabulary-stage-nav{position:static;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;padding-top:env(safe-area-inset-top,0px)}.vocabulary-teaching-flow .vocabulary-stage-nav button{font-size:15px!important;min-height:46px;padding:10px 8px!important}.vocabulary-teaching-flow .vocabulary-model{padding:14px}.vocabulary-teaching-flow .vocabulary-model>*+*{margin-top:5px}.vocabulary-teaching-flow .vocabulary-model .beginner-focus-word{font-size:34px!important}.vocabulary-teaching-flow .vocabulary-model .beginner-meaning,.vocabulary-teaching-flow .word-overview-ipa{font-size:19px}.vocabulary-teaching-flow .grapheme-teaching[data-pronunciation-interactive=true] .grapheme-pairs{grid-template-columns:minmax(0,1fr);gap:10px}.vocabulary-teaching-flow .grapheme-teaching[data-pronunciation-interactive=true] .syllable-card{min-height:125px}.vocabulary-teaching-flow .vocabulary-task{scroll-margin-block:16px 32px}.vocabulary-teaching-flow .single-phoneme-options button{min-width:48px;min-height:48px}.vocabulary-teaching-flow .vocabulary-task label{min-width:0}}@media(max-height:520px)and (max-width:1199px){.vocabulary-teaching-flow .vocabulary-stage-nav,.vocabulary-teaching-flow .vocabulary-model{position:static}.vocabulary-teaching-flow .vocabulary-task input{scroll-margin-block:24px 100px}.vocabulary-teaching-flow .vocabulary-task{scroll-margin-block:12px}}.word-audio-control{min-width:0;margin-block:12px}.word-audio-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.word-audio-actions button,.word-audio-actions select{min-height:48px}.word-audio-actions label{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:16px}.word-audio-status{font-size:15px!important;min-height:1.5em;margin:8px 0!important}.word-audio-control select{font:inherit;max-width:100%;padding:8px;border:1px solid #c8c1d5;border-radius:10px;background:#fff;color:#292236}.vocabulary-footer .vocabulary-navigation{display:grid;grid-template-columns:minmax(90px,.4fr) minmax(0,1fr);gap:12px}.vocabulary-footer button{min-height:48px}.word-teaching{padding-bottom:28px}.selection-actions>.word-audio-control{flex-basis:100%}@media(max-width:1099px){.student-learning-shell .vocabulary-footer{position:fixed;bottom:0;left:0;right:0;z-index:10;padding:12px 18px calc(12px + env(safe-area-inset-bottom));background:#fffffff5;max-height:35dvh;overflow:auto}.word-teaching{margin-bottom:calc(110px + env(safe-area-inset-bottom))!important}.student-learning-shell[data-keyboard-open=true] .vocabulary-footer{position:static;padding:12px 0;border:0;max-height:none}.student-learning-shell[data-keyboard-open=true] .word-teaching{margin-bottom:20px!important}}@media(max-width:430px){.word-audio-actions{gap:10px}.word-audio-actions .reading-speed-control{width:100%}.vocabulary-footer .vocabulary-navigation{grid-template-columns:100px minmax(0,1fr)}.vocabulary-footer .primary{white-space:normal;font-size:16px}}.inline-ipa{font-family:inherit;white-space:nowrap;user-select:text;-webkit-user-select:text}.inline-ipa button.phoneme-token{display:inline!important;position:relative;min-width:0;min-height:0!important;height:auto;line-height:inherit;font:inherit;vertical-align:baseline;margin:0;padding:0!important;border:0!important;border-radius:0!important;background:transparent!important;color:#7048b7!important;cursor:pointer}.inline-ipa button.phoneme-token:before{content:"";position:absolute;top:-3px;right:0;bottom:-3px;left:0;background:transparent}.inline-ipa button.phoneme-token.sounding{color:#a43f82!important}.inline-ipa button.phoneme-token:focus-visible{outline:2px solid #7048b7;outline-offset:3px}.inline-ipa .phoneme-error{display:block;font-size:14px;white-space:normal;color:#8b3448}.pronunciation-action-copy{line-height:1.8}.pronunciation-action-copy p{margin-block:8px}.grapheme-teaching{min-width:0;max-width:100%;line-height:1.6}.grapheme-teaching h3{font-size:21px}.grapheme-teaching .grapheme-pairs{display:flex;flex-wrap:wrap;align-items:stretch;gap:8px 4px;margin:12px 0;max-width:100%}.grapheme-pair{display:grid;grid-template-rows:minmax(40px,auto) minmax(36px,auto);min-width:36px;max-width:100%;border-radius:4px;padding:2px 3px;background:transparent;border-bottom:3px solid transparent;box-sizing:border-box}.grapheme-pair.is-current{background:#e4f1ec;border-bottom-color:#357563}.grapheme-teaching button.grapheme-select{display:block!important;min-width:30px!important;min-height:40px!important;width:100%;font-size:23px!important;font-weight:650;padding:0 3px!important;margin:0!important;line-height:1.4;border:0!important;border-radius:0!important;background:transparent!important;color:#263c35!important;box-shadow:none!important;cursor:pointer;touch-action:manipulation}.grapheme-select[aria-pressed=true]{text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:2px}.grapheme-teaching .grapheme-select:focus-visible{outline:2px solid #357563!important;outline-offset:2px}.grapheme-sound{display:flex;align-items:center;justify-content:center;min-height:36px;font-size:20px;white-space:nowrap;line-height:1.5}.grapheme-sound .inline-ipa{font-size:20px;line-height:1.5}.grapheme-sound .inline-ipa button.phoneme-token:before{top:-3px;right:0;bottom:-3px;left:0}.silent-grapheme{font:13px/1.4 system-ui;color:#52615c}.mapping-explanation{margin-block:12px;min-width:0;overflow-wrap:anywhere}.mapping-explanation p{margin-block:7px}.alignment-accent,.alignment-stress{font-size:14px;color:#53615c}.grapheme-whole{display:grid;gap:5px;padding:12px;background:#f0f2ef;border-radius:5px;overflow-wrap:anywhere}.grapheme-whole>div:first-child{font-size:25px}.grapheme-whole>div:last-child{font-size:19px}.grapheme-whole .inline-ipa{white-space:normal;overflow-wrap:anywhere}.grapheme-teaching .ipa-marker{font-weight:700;color:#4d5050}.grapheme-teaching .phoneme-token{font-weight:inherit}.grapheme-teaching .phoneme-token:focus-visible{outline-offset:1px}.grapheme-teaching .pronunciation-reference .inline-ipa{white-space:normal;overflow-wrap:anywhere}@media(max-width:360px){.grapheme-pair{padding-inline:2px}.grapheme-teaching button.grapheme-select{font-size:21px!important}.grapheme-sound,.grapheme-sound .inline-ipa{font-size:19px}.grapheme-pairs{gap:8px 3px}}@media(max-height:450px){.grapheme-teaching p{margin-block:6px}}.grapheme-teaching[data-pronunciation-interactive=true] .grapheme-pair{display:flex;flex-direction:column;flex:1 1 96px;min-width:88px;max-width:220px;padding:6px;border-radius:10px;border:1px solid #ded8ec;border-bottom:3px solid transparent}.grapheme-teaching[data-pronunciation-interactive=true] .grapheme-pairs{gap:8px}.grapheme-teaching[data-pronunciation-interactive=true] .grapheme-pair.is-current{border-bottom-color:#7048b7;background:#f0ebfa}.grapheme-teaching[data-pronunciation-interactive=true] .grapheme-pair.is-playing{box-shadow:0 0 0 2px #7048b7}.grapheme-teaching[data-pronunciation-interactive=true] .segment-audio-button,.grapheme-teaching[data-pronunciation-interactive=true] .segment-audio-unavailable{display:grid;grid-template-rows:minmax(42px,auto) minmax(36px,auto) minmax(32px,auto);align-items:center;justify-items:center;gap:4px;box-sizing:border-box;width:100%;min-height:126px;padding:8px 4px;border:0;border-radius:8px;background:#f4f0fc;color:#302644;text-align:center}.grapheme-teaching[data-pronunciation-interactive=true] .segment-audio-button{cursor:pointer;touch-action:manipulation}.grapheme-teaching[data-pronunciation-interactive=true] .segment-audio-button:focus-visible{outline:3px solid #7048b7;outline-offset:2px}.grapheme-teaching[data-pronunciation-interactive=true] .segment-approximation{font-size:12px;line-height:1.5;overflow-wrap:anywhere}.grapheme-teaching[data-pronunciation-interactive=true] .segment-spelling{font-size:25px;line-height:1.35}.grapheme-teaching[data-pronunciation-interactive=true] .segment-audio-status{font-size:12px;line-height:1.5;margin:5px 0;min-height:36px}.grapheme-teaching[data-pronunciation-interactive=true] button.grapheme-select{font-size:13px!important;min-height:44px!important;line-height:1.5;background:transparent!important;color:#6242a0!important}.grapheme-teaching[data-pronunciation-interactive=true] .segment-audio-unavailable{background:#f3f3f3;color:#52615c}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-learning{margin-top:20px;padding-top:14px;border-top:1px solid #ded8ec}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-options{display:flex;flex-wrap:wrap;gap:8px}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-options button{min-width:48px;min-height:48px;padding:8px;font-size:22px;touch-action:manipulation;border:1px solid #d9d0ec;border-radius:8px;background:#f0ebfa;color:#6242a0}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-options button[aria-expanded=true]{background:#6242a0;color:#fff}.grapheme-teaching[data-pronunciation-interactive=true] .unavailable-phoneme{padding:8px;font-size:16px;color:#52615c}.grapheme-teaching[data-pronunciation-interactive=true] .unavailable-phoneme small{font-size:12px}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail{margin:14px 0;padding:14px;border:1px solid #d9d0ec;border-radius:10px;background:#faf8ff;overflow-wrap:anywhere}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail h4{font-size:20px;margin:0 0 6px}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail h5{font-size:16px;margin:12px 0 5px}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail dl{display:grid;grid-template-columns:3em 1fr;gap:8px}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail dt{font-weight:650}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail dd{margin:0}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail .phoneme-lesson-play{min-height:48px;padding:8px 14px;background:#7048b7;color:#fff;border:0;border-radius:8px;touch-action:manipulation}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail>button:last-child{min-height:44px}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail li{margin:6px 0}@media(max-width:390px){.grapheme-teaching[data-pronunciation-interactive=true] .grapheme-pair{flex-basis:88px;padding:4px}.grapheme-teaching[data-pronunciation-interactive=true] .segment-spelling{font-size:23px}.grapheme-teaching[data-pronunciation-interactive=true] .segment-approximation{font-size:11px}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail{padding:10px}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail dl{grid-template-columns:1fr;gap:4px}.grapheme-teaching[data-pronunciation-interactive=true] .single-phoneme-detail dd{margin-bottom:8px}}.current-phoneme-line .inline-ipa{font-size:26px;display:inline-flex;align-items:center;gap:0;vertical-align:middle}.current-phoneme-line .inline-ipa button.phoneme-token{display:inline-flex!important;align-items:center;justify-content:center;min-width:44px;min-height:44px!important;padding:0 4px!important;border-radius:8px!important;background:#eee6ff!important;touch-action:manipulation;box-sizing:border-box}.current-phoneme-line .inline-ipa button.phoneme-token:before{content:none}.child-pronunciation-focus{line-height:1.55}.child-pronunciation-focus h3{font-size:21px}.pronunciation-reference>summary{min-height:44px;display:list-item;align-content:center;cursor:pointer;color:#61566d}.pronunciation-reference .inline-ipa{font-size:inherit}.vocabulary-teaching-flow{width:100%;min-width:0}.vocabulary-stage-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;margin:0 0 18px}.vocabulary-stage-nav button{min-width:0;font-size:15px!important;padding:9px 4px!important;min-height:48px}.vocabulary-stage-nav [aria-current=step]{background:#5743a5!important;color:#fff!important;border-color:#5743a5!important}.vocabulary-flow-grid{display:grid;gap:18px;min-width:0}.vocabulary-model,.vocabulary-task{min-width:0}.vocabulary-task{scroll-margin-block:18px;outline:0}.vocabulary-task h3{margin-top:0}.vocabulary-task>button,.vocabulary-task>div>button{margin:8px 8px 4px 0}.vocabulary-task input{display:block;box-sizing:border-box;width:100%;max-width:100%;font:inherit;min-height:48px;padding:12px;border:1px solid #bcb5cc;border-radius:12px;scroll-margin-block:100px}.vocabulary-task label{display:block;margin-block:12px}.teaching-letter-parts{display:flex;gap:6px;flex-wrap:wrap;font-size:30px;line-height:1.4;margin-block:16px}.teaching-letter-parts span{padding:6px 10px;border:2px solid transparent;border-radius:12px}.teaching-letter-parts .current{background:#eee6ff;border-color:#5743a5;color:#493391}.teaching-beats{display:flex;gap:10px;align-items:center}.teaching-beats span{display:grid;place-items:center;width:38px;height:38px;border:1px solid #bcb5cc;border-radius:50%}.teaching-beats .strong{background:#5743a5;color:#fff;font-size:26px;width:49px;height:49px;font-weight:800}.teaching-gap{font-size:23px;overflow-wrap:anywhere}.teaching-gap mark{background:#eee6ff;color:#493391;font-size:17px}.vocabulary-task details{margin-block:12px}.vocabulary-task p{line-height:1.55}.vocabulary-task [data-independent-practice] a{display:inline-flex;min-height:44px;align-items:center}.student-shell .word-teaching:has(.vocabulary-teaching-flow){max-width:1040px}.vocabulary-flow-grid .beginner-focus-word{font-size:clamp(30px,6vw,44px)!important;letter-spacing:0}.vocabulary-teaching-flow .beginner-meaning{font-size:21px}.vocabulary-picker .study-actions{max-height:260px;overflow-y:auto}.vocabulary-selection-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:8px;margin-block:16px}.vocabulary-selection-list button{min-height:48px}.vocabulary-selection-list [aria-pressed=true]{background:#eee6ff;border-color:#5743a5}.study-vocabulary-flow{max-width:1040px;margin:auto}.study-vocabulary-flow .word-teaching{max-width:none}.student-learning-shell .beginner-word-layout:has(.vocabulary-teaching-flow){max-width:1040px}@media(min-width:900px){.vocabulary-flow-grid{grid-template-columns:minmax(240px,.85fr) minmax(0,1.15fr);gap:38px}.vocabulary-model{padding-right:22px;border-right:1px solid #e5e0ec}.vocabulary-stage-nav{max-width:720px}.word-teaching:has(.vocabulary-teaching-flow){max-width:1040px}}@media(max-width:600px){.vocabulary-stage-nav{gap:4px;margin-bottom:14px}.vocabulary-stage-nav button{font-size:13px!important}.vocabulary-flow-grid{gap:12px}.vocabulary-task p{margin-block:9px}.vocabulary-flow-grid .beginner-focus-word{margin-block:6px}.vocabulary-teaching-flow .word-audio-actions{gap:7px}.vocabulary-teaching-flow .word-audio-status{margin-block:7px}.vocabulary-task .button.primary{width:100%}}@media(max-height:550px){.vocabulary-teaching-flow .word-audio-status{font-size:14px}.vocabulary-flow-grid{gap:10px}.vocabulary-task input{scroll-margin-block:30px}}.study-vocabulary-flow{padding-bottom:calc(190px + env(safe-area-inset-bottom))}.study-vocabulary-flow .vocabulary-task button{scroll-margin-block:100px 180px}.study-vocabulary-flow .vocabulary-task input{scroll-margin-bottom:190px}.study-vocabulary-flow .vocabulary-footer{padding-inline:max(18px,calc((100vw - 1020px)/2))}@media(min-width:1100px){.study-vocabulary-flow{padding-bottom:30px}.study-vocabulary-flow .vocabulary-footer{position:sticky;bottom:0;padding:12px 0;background:#f8f6f0f5;border:0}.study-vocabulary-flow .vocabulary-task button{scroll-margin-block:90px}}@media(max-height:550px){.study-vocabulary-flow .vocabulary-footer{position:static;padding:12px 0;border:0}.study-vocabulary-flow{padding-bottom:24px}}.vocabulary-task .vocabulary-correction{margin-block:16px;padding:16px;border-radius:16px;background:#f5f1fc}.vocabulary-task .vocabulary-correction button{min-height:48px;max-width:100%;white-space:normal;margin:8px 8px 4px 0}.vocabulary-task .vocabulary-correction .button.primary{display:block}.vocabulary-task [role=status]{overflow-wrap:anywhere}.textbook-page button,.textbook-page input,.textbook-page select,.textbook-page textarea{font:inherit}.textbook-page button{cursor:pointer}.textbook-page button:disabled{opacity:.5;cursor:not-allowed}.textbook-page input:focus-visible,.textbook-page select:focus-visible,.textbook-page textarea:focus-visible,.textbook-page summary:focus-visible{outline:3px solid var(--primary);outline-offset:3px}.textbook-page .button{border:1px solid var(--border)}.textbook-page .primary{border-color:var(--primary)}.textbook-back{display:inline-flex;align-items:center;gap:8px;min-height:44px;color:var(--primary);margin-bottom:20px}.textbook-section{padding:24px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);min-width:0;margin-bottom:24px}.textbook-section h2{margin-bottom:16px}.textbook-section p{margin:10px 0;overflow-wrap:anywhere}.textbook-muted{color:var(--text-secondary);font-size:.875rem}.profile-textbook-link{display:flex;align-items:center;gap:16px;min-height:76px}.profile-textbook-link span{flex:1;min-width:0}.profile-textbook-link small{display:block;color:var(--text-secondary);margin-top:6px}.setup-guide{color:var(--text-secondary);margin-bottom:24px;font-size:.875rem}.textbook-settings-layout,.subject-book-grid,.candidate-grid,.study-form,.match-metadata{display:grid;grid-template-columns:minmax(0,1fr);gap:16px}.textbook-settings-layout{gap:24px}.study-form label,.match-form label{display:grid;gap:8px;min-width:0}.textbook-page input,.textbook-page select,.textbook-page textarea{width:100%;min-width:0;max-width:100%;min-height:48px;border:1px solid var(--border);background:#fff;border-radius:10px;padding:10px 12px;color:var(--text-primary)}.textbook-page textarea{resize:vertical;min-height:180px}.textbook-page select{white-space:normal}.subject-book-card{padding:20px;background:var(--background);border:1px solid var(--border);border-radius:14px;min-width:0}.subject-book-card .button{margin-top:16px;width:100%}.sample-label{display:inline-block;color:var(--text-secondary);font-size:.875rem;padding:4px 8px;border-radius:8px;background:var(--surface-secondary)}.textbook-candidate{border:1px solid var(--border);border-radius:16px;padding:20px;min-width:0}.textbook-candidate h3{margin-top:12px;font-size:1.15rem}.textbook-candidate .button{margin-top:20px;width:100%}.textbook-candidate p{color:var(--text-secondary)}.recommendation-reasons{font-size:.875rem}.textbook-section-heading{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px}.textbook-section-heading h2{margin:0}.candidate-section .candidate-grid{margin-top:20px}.textbook-notice{color:var(--primary);margin:16px 0;overflow-wrap:anywhere}.identify-entry .button{margin-top:20px}.match-form{display:grid;gap:20px}.match-form summary{min-height:44px;padding:10px 0;cursor:pointer;color:var(--primary)}.match-metadata{margin-top:16px}.match-result{min-width:0}.match-result>.textbook-candidate{margin-top:16px}.confidence-label{color:var(--primary);font-weight:650}.match-results>.button{margin-top:24px}@media(min-width:768px){.study-form,.subject-book-grid,.candidate-grid,.match-metadata{grid-template-columns:repeat(2,minmax(0,1fr))}.profile-textbook-link{max-width:680px}}@media(min-width:1180px){.textbook-settings-layout{grid-template-columns:minmax(260px,.8fr) minmax(0,1.5fr);align-items:start}.study-information .study-form{grid-template-columns:minmax(0,1fr)}}@media(prefers-reduced-motion:reduce){.textbook-page *{animation:none;transition:none;scroll-behavior:auto}}.import-page{overflow-wrap:anywhere}.import-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:24px;min-width:0}.import-card h2,.import-card h3{margin-bottom:16px}.import-card p{margin:12px 0}.import-actions,.item-actions{display:flex;flex-wrap:wrap;gap:12px;margin:16px 0}.import-page .button{min-height:52px;max-width:100%;white-space:normal}.import-file{display:none}.import-page input:not([type=checkbox]),.import-page textarea,.import-page select{font:inherit;width:100%;min-width:0;max-width:100%;min-height:48px;padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--text-primary)}.import-page textarea{resize:vertical}.import-page label{display:grid;gap:8px}.import-page input:focus-visible,.import-page textarea:focus-visible,.import-page select:focus-visible,.import-page summary:focus-visible{outline:3px solid var(--primary);outline-offset:3px}.import-page summary{min-height:44px;cursor:pointer;padding:10px 0}.selected-preview,.import-preview img{width:100%;max-height:420px;object-fit:contain;border-radius:12px}.import-preview{margin-bottom:24px;background:var(--surface);border:1px solid var(--border);padding:16px;border-radius:16px}.import-preview p{font-size:.875rem;color:var(--text-secondary)}.import-message{padding:12px 0;color:var(--primary)}.import-confirm-layout{display:grid;gap:24px;grid-template-columns:minmax(0,1fr)}.confirm-items{list-style:none;margin:20px 0;padding:0;display:grid;gap:16px}.confirm-item{padding:16px;border:1px solid var(--border);border-radius:12px;min-width:0}.confirm-item-line{display:flex;align-items:center;gap:8px}.confirm-item-line>input{flex:1}.import-page .import-check{display:flex;align-items:center;min-width:60px;min-height:44px;gap:6px}.import-check input{width:24px;height:24px}.item-actions .button{flex:1;min-width:60px;padding:8px}.import-add{display:grid;gap:12px}.import-page pre{white-space:pre-wrap;overflow-wrap:anywhere;font:inherit;max-height:400px;overflow:auto}.import-manual{display:grid;gap:16px;margin-top:20px}.import-quick-entry{margin:24px 0}.import-quick-entry h2{margin-bottom:12px}.active-import-controls{margin:16px 0;padding:16px;border:1px solid var(--border);border-radius:12px}.active-import-controls .button{margin-top:12px}.dev-import{margin-top:24px}.dev-import button{margin-top:16px}@media(min-width:1024px){.import-confirm-layout{grid-template-columns:minmax(220px,.8fr) minmax(0,1.5fr);align-items:start}.import-manual{grid-template-columns:repeat(2,minmax(0,1fr))}}.english-page .word-card-top h2{min-width:0;overflow-wrap:anywhere}.english-page .word-card-top .icon-button{flex:0 0 44px;min-width:44px}.enrich-items{display:grid;gap:20px;grid-template-columns:minmax(0,1fr)}.enrich-items .import-card{margin:0}.enrich-item-heading{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px}.enrich-fields{display:grid;gap:16px;grid-template-columns:minmax(0,1fr)}.enrich-fields label{min-width:0}.enrich-fields small{color:var(--primary)}.enrich-page h2{overflow-wrap:anywhere}.enrich-fields input,.enrich-fields textarea{box-sizing:border-box}@media(min-width:768px){.enrich-fields{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(min-width:1280px){.enrich-items{grid-template-columns:repeat(2,minmax(0,1fr))}}.mistake-center-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.mistake-filters{display:flex;flex-wrap:wrap;gap:16px;margin:20px 0}.mistake-filters label{display:flex;flex-direction:column;gap:8px;flex:1 1 180px;min-width:0}.mistake-filters select{min-height:48px;width:100%;max-width:100%;border:1px solid #cbd5e1;border-radius:12px;background:#fff;padding:10px;font:inherit}.mistake-list-card{display:block;text-decoration:none;color:inherit;min-width:0}.mistake-question-summary{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;font-size:1.1rem;overflow-wrap:anywhere}.mistake-status{display:inline-block;border-radius:20px;background:#fff4da;color:#81500d;padding:5px 10px;flex-shrink:0}.mistake-status.mastered{background:#e5f5ed;color:#256847}.mistake-confirm{margin-top:16px;padding:16px;background:#fff7e5;border-radius:12px}.homework-mistake-actions{margin:12px 0}.homework-mistake-actions .homework-note{margin:8px 0}.mistake-rating{margin-top:24px}.homework-mistake-actions .button,.mistake-rating .button,.mistake-confirm .button{min-height:48px}.mistake-list-card p,.homework-detail-panel p{overflow-wrap:anywhere}.mistake-center-grid .homework-card-panel{margin:0}.homework-mistake-entry{margin:20px 0}.homework-mistake-entry .button{min-height:48px}@media(max-width:600px){.mistake-center-grid{grid-template-columns:1fr}.mistake-filters{gap:12px}.mistake-filters label{flex-basis:100%}.mistake-rating .button{flex:1 1 100px}.mistake-list-card .homework-question-top{flex-wrap:wrap}.mistake-confirm .button{max-width:100%}}.homework-mistake-actions .button.primary{min-width:160px}.activity-workspace label,.practice-answer label{display:block;font-weight:600;margin:14px 0 8px}.activity-workspace textarea,.activity-workspace input:not([type=checkbox]):not([type=radio]),.practice-answer textarea,.practice-answer input[type=text]{display:block;box-sizing:border-box;width:100%;max-width:100%;min-width:0;min-height:48px;padding:12px 14px;margin-top:8px;border:2px solid #7c9187;border-radius:10px;background:#fff;color:#202c2a;font:inherit;font-weight:400;line-height:1.6}.activity-workspace textarea,.practice-answer textarea{resize:vertical;min-height:120px}.activity-workspace .practice-answer input.practice-short-answer,.textbook-study .practice-answer input.practice-short-answer{width:min(100%,28rem)}.page.textbook-course{max-width:900px}.activity-workspace textarea:focus,.activity-workspace input:focus,.activity-workspace .practice-answer input:focus,.practice-answer textarea:focus,.practice-answer input:focus{border-color:#246553;outline:3px solid #a9d7c4;outline-offset:2px}.practice-answer [aria-invalid=true],.activity-workspace .practice-answer input[aria-invalid=true]{border-color:#a72f36}.practice-input-error{color:#a72f36;font-weight:500}.practice-input-help{color:#52665d}.activity-workspace textarea:disabled,.activity-workspace .practice-answer input:disabled,.practice-answer input:disabled,.practice-answer textarea:disabled{background:#e9efec;color:#52665d;cursor:not-allowed}.practice-answer fieldset{min-width:0;border:0;padding:0;margin:12px 0}.practice-answer legend{font-weight:600;margin-bottom:8px}.practice-answer label.practice-option{display:flex;gap:12px;align-items:flex-start;border:2px solid #b0bfb7;border-radius:10px;min-height:48px;padding:12px;font-weight:400;cursor:pointer;margin:8px 0}.practice-option:has(input:checked){border-color:#246553;background:#e8f4ec}.practice-option:has(input:focus-visible){outline:3px solid #a9d7c4;outline-offset:2px}.practice-option input{width:20px;height:20px;flex-shrink:0;margin:2px 0;accent-color:#246553}.practice-option span{overflow-wrap:anywhere}.practice-result{padding:24px;border:2px solid #93b5a2;border-radius:16px;background:#edf7f0;margin:20px 0;scroll-margin-top:20px}.practice-result h2{margin-bottom:12px}.practice-result-counts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:18px 0}.practice-result-counts div{background:#fff;padding:12px;border-radius:10px}.practice-result-counts dt{font-size:.9rem}.practice-result-counts dd{font-size:1.4rem;font-weight:650;margin:4px 0 0}.practice-result-list .library-content{margin:14px 0;padding:18px;border:1px solid #c7d6ce;border-radius:12px}.practice-result-list .library-content[data-result=incorrect]{border-left:4px solid #b44747}.practice-result-list summary,.practice-review-options summary{min-height:44px;cursor:pointer;font-weight:600;padding:10px 0}.practice-feedback-status{font-weight:650}.practice-group-context{white-space:pre-wrap;line-height:1.8}.course-sections a.button.secondary{margin-top:16px;min-height:48px;border:2px solid #9eb7a8;background:#fff;color:#205739}.course-sections a.button:hover{background:#e8f4ec}.course-sections a.button:focus-visible{outline:3px solid #246553;outline-offset:3px}@media(max-width:600px){.practice-result{padding:16px}.practice-result-counts{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.practice-answer input,.practice-answer textarea,.activity-workspace textarea{font-size:16px}.practice-result-list .library-content{padding:14px}}.active-mistake-review .practice-result[data-feedback=correct]{background:#edf7f0;border-color:#35734c;color:#163d26}.active-mistake-review .practice-result[data-feedback=incorrect]{background:#fff0ef;border-color:#a63239;color:#612329}.active-mistake-review .practice-result[data-feedback=pending]{background:#f1f3f6;border-color:#667386;color:#263448}.active-mistake-review .review-failure-notice{padding:16px;background:#fff5e8;border:2px solid #956215;border-radius:10px;color:#664312}.active-mistake-review .review-validation-title{color:#942b34;font-weight:600}.active-mistake-review .review-recovery-actions{display:flex;flex-wrap:wrap;gap:12px;margin:16px 0}.active-mistake-review .review-recovery-actions .button{min-height:48px}.practice-source-material{margin:16px 0;padding:12px;border:1px solid #aab9b0;border-radius:10px;overflow-wrap:anywhere}.practice-source-material summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-weight:600}.practice-source-material ul{padding-left:24px;line-height:1.8}.student-reading-context{margin:20px 0;padding:16px;border:1px solid #b5c7bd;border-radius:12px;overflow-wrap:anywhere}.student-reading-context summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-weight:600}.student-reading-paragraphs p{line-height:1.9;margin:1.25em 0;white-space:normal}.student-reading-context .button{margin:8px 8px 0 0}.daily-follow{max-width:52rem;padding:1rem;border:1px solid #d9d3ed;border-radius:1rem;background:#faf8ff;overflow-wrap:anywhere}.daily-follow header{display:flex;gap:1rem;flex-wrap:wrap;align-items:center;justify-content:space-between}.daily-follow-sentence{font-size:clamp(1.3rem,3vw,1.65rem);line-height:1.7;padding:.75rem;border-radius:.5rem}.daily-follow[data-daily-phase=PLAYING_DEMO] .daily-follow-sentence{background:#e9e1ff}.daily-follow-actions{display:flex;flex-wrap:wrap;gap:.5rem;margin:.75rem 0}.daily-follow button,.daily-follow select,.daily-follow summary{min-height:48px;max-width:100%;font:inherit}.daily-follow button{padding:.6rem .85rem;cursor:pointer}.daily-follow details{margin:.75rem 0}.daily-follow label{display:inline-flex;align-items:center;flex-wrap:wrap;gap:.5rem;margin:.4rem .8rem .4rem 0}.daily-follow progress{width:100%;height:.4rem;accent-color:#6551a4}.daily-follow small{display:block;line-height:1.6;color:#5e586b}@media(max-width:480px){.daily-follow-actions .button.primary{flex:1 1 50%}.daily-follow{padding:.8rem}}.section-teaching{overflow-wrap:anywhere}.section-options{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:18px 0}.section-options details{max-width:65%}.section-options details a,.section-options details button{display:block;margin:10px 0}.section-originals{display:grid;gap:20px}.section-originals figure{margin:0}.section-originals img{display:block;max-width:100%;height:auto;border-radius:12px}.section-source-text{white-space:pre-wrap;line-height:1.85}.grammar-pair{padding:18px 0;border-bottom:1px solid #e9e3ef;font-size:21px}.section-teaching textarea,.section-teaching input:not([type=checkbox]){display:block;width:100%;max-width:100%;font-size:18px;margin:12px 0;padding:12px;border:1px solid #d7cfe6;border-radius:12px;box-sizing:border-box}.section-teaching textarea{min-height:140px}.section-teaching button,.section-teaching .button{min-height:48px}.section-teaching .beginner-flow button{max-width:300px;white-space:normal;overflow-wrap:anywhere}.teaching-unit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.teaching-unit-grid article{min-width:0}.teaching-unit-grid .button{margin-top:14px}.section-teaching .beginner-footer-inner .primary{white-space:normal;min-width:0}@media(max-width:600px){.teaching-unit-grid{grid-template-columns:1fr}.section-options{align-items:flex-start}.section-teaching .beginner-flow{scrollbar-width:thin}.section-teaching .beginner-flow button{max-width:230px}.section-teaching .beginner-footer-inner{grid-template-columns:minmax(90px,1fr) minmax(0,2fr)}}.student-learning-shell .section-teaching .beginner-flow button{white-space:normal;overflow-wrap:anywhere}.student-learning-shell .section-teaching .beginner-footer-inner{grid-template-columns:100px minmax(0,1fr)}.section-teaching .beginner-footer-inner .beginner-quiet{white-space:nowrap}.inline-sentence-audio{display:flex;align-items:center;gap:12px;min-height:48px;flex-wrap:wrap}.inline-sentence-audio>span{font-size:15px;color:#555;min-height:22px}.inline-sentence-audio button{font-size:17px;min-width:88px}.vocabulary-groups{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.vocabulary-groups button{padding:8px 12px;font-size:16px;background:#f5f3fa;border:1px solid #ddd5e9;border-radius:12px}.vocabulary-groups button[aria-pressed=true]{background:#e9e1f7;border-color:#8063b0;font-weight:700}.summary-actions{display:flex;flex-wrap:wrap;gap:12px}.section-teaching .beginner-flow button:not([aria-current=step]){background:#f6f4f9;color:#5c5565;border-color:#e5dfeb}.section-teaching .beginner-flow button[aria-current=step]{font-weight:700;box-shadow:0 0 0 2px #b9a4d7}.section-learning-summary p{font-size:18px;line-height:1.8}@media(max-width:420px){.vocabulary-groups button{flex:1;min-width:88px}.inline-sentence-audio{gap:8px}.summary-actions>*{max-width:100%;white-space:normal}}.section-summary-details{margin-top:24px;border-top:1px solid #e5dfeb;padding-top:12px}.section-summary-details>summary{min-height:48px;align-content:center;cursor:pointer;color:#61566d}.student-section-summary h3{margin-top:22px}.student-section-summary .summary-actions{margin-block:16px}.section-summary-details p{font-size:16px}.multi-blank{min-width:0}.multi-blank-field{min-width:0;margin:1rem 0;border:1px solid #d9d2e5;border-radius:1rem;padding:1rem;overflow-wrap:anywhere}.multi-blank-field.current{border-color:#7457ae}.multi-blank-field input{display:block;box-sizing:border-box;width:100%;min-width:0;min-height:44px;font-size:16px;scroll-margin-block:8rem}.multi-blank-field legend{font-weight:600}.multi-blank-field button{max-width:100%;white-space:normal}.section-teaching .vocabulary-teaching-flow .vocabulary-model{display:block}.student-learning{max-width:780px;margin-inline:auto;line-height:1.7;overflow-wrap:anywhere}.student-learning .course-heading{margin:20px 0}.student-learning .course-heading h1{font-size:1.7rem;margin:8px 0}.student-learning h2{font-size:1.15rem}.student-learning .button.primary{min-height:48px;min-width:160px}.student-practice{background:#fff;border:1px solid #dce5e0;border-radius:18px;padding:28px}.student-practice progress{width:100%;height:6px;accent-color:#27765a}.student-question-progress{color:#53665c;font-size:.95rem}.student-question-stem{font-size:1.4rem!important;line-height:1.65;font-weight:550;margin:28px 0 20px}.student-instruction{color:#54645a}.student-material{margin:12px 0}.student-material p{white-space:pre-wrap;line-height:1.85}.student-material summary,.student-secondary summary{cursor:pointer;padding:8px 0;min-height:44px}.student-action{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:24px}.student-save-state{font-size:.85rem;color:#54665a}.student-secondary{display:flex;gap:20px;align-items:baseline;flex-wrap:wrap;border-top:1px solid #dee6e0;margin-top:24px;padding-top:16px;font-size:.92rem}.student-secondary details>a,.student-course-list details>a{display:block;padding:10px 0}.student-secondary details button{display:block;margin:10px 0}.student-feedback{margin-top:24px;padding:18px;border-radius:12px;background:#f2f4f5}.student-feedback h3{margin:0;font-size:1.15rem}.student-feedback[data-feedback=GRADED_CORRECT]{background:#edf7f0;border-left:4px solid #2d7850}.student-feedback[data-feedback=GRADED_INCORRECT]{background:#fff0ee;border-left:4px solid #b14540}.student-summary{padding:24px 0}.student-grammar{background:#fff;padding:24px;border:1px solid #dce5e0;border-radius:16px}.student-grammar li{margin-bottom:14px}.student-grammar>p{padding:12px 0;border-bottom:1px solid #edf0ed}.student-course-list{list-style:none;padding:0}.student-course-list>li{border-bottom:1px solid #e0e8e1;padding:10px 0}.student-course-list summary{cursor:pointer;padding:12px 0}.student-learning .teaching-reader .course-reading{padding:16px 0;border:0;border-radius:0;margin:16px 0}.student-learning .lesson-paragraph-heading{justify-content:flex-end}.student-learning .course-text{font-size:1.15rem;line-height:2}.student-learning .course-reading button.inline-word{min-height:0}.student-learning .sentence-help{font-size:.8rem}.student-learning .lesson-help-panel h2{font-size:1.2rem}@media(max-width:600px){.student-practice,.student-grammar{padding:18px}.student-question-stem{font-size:1.2rem!important}.student-action .primary{width:100%}.student-secondary{gap:12px}.student-learning .course-heading h1{font-size:1.45rem}.student-learning .teaching-reader .course-text{font-size:1.1rem}}.student-tutor{margin:16px 0}.student-tutor-panel{background:#f4f8f5;border:1px solid #cbded1;border-radius:14px;padding:18px;margin-top:12px}.student-tutor-heading{display:flex;justify-content:space-between;align-items:center;gap:12px}.student-tutor-heading h3{font-size:1.05rem;margin:0}.student-tutor-reply p{white-space:pre-line}.student-tutor textarea{display:block;width:100%;min-height:85px;box-sizing:border-box;margin:8px 0}.student-tutor label{display:block;margin-top:14px}.student-tutor button{min-height:44px;white-space:normal}.tutor-actions{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.tutor-words{display:flex;flex-wrap:wrap;gap:12px}.tutor-words>div{min-width:100px}.tutor-words dd{margin:4px 0}.student-learning-evidence{font-size:.9rem;color:#385c43}.student-tutor small{display:block;color:#53665c}.student-tutor details{margin:16px 0}.student-tutor summary{min-height:44px;cursor:pointer}@media(max-width:600px){.student-tutor-panel{padding:12px}.student-tutor-heading{align-items:flex-start}.student-tutor-heading button{min-width:90px}.tutor-actions button{flex:1 1 120px}}.tutor-next{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:12px 0}.student-tutor .tutor-link,.tutor-source .tutor-link{background:transparent;border:0;color:#245b46;text-decoration:underline;text-underline-offset:3px;font-size:.9rem;min-height:40px;padding:6px 8px}.student-tutor .tutor-transfer{display:block;margin-top:10px}.student-tutor .tutor-full{margin:8px 0}.student-tutor .tutor-words{margin:8px 0;gap:8px 18px}.student-tutor textarea{min-height:58px}.student-tutor-heading{align-items:flex-start}.student-assisted-feedback{font-weight:550;color:#245b46}.tutor-source{margin:10px 0}.tutor-source-actions{display:flex;gap:8px;flex-wrap:wrap}.tutor-source-text{line-height:1.85}.tutor-source-text>p{white-space:pre-wrap}.source-sentence-pair{padding:10px 0;border-bottom:1px solid #dce5e0}.source-sentence-pair p{margin:4px 0}.source-sentence-pair [lang=zh-CN]{font-size:.95rem;color:#385b49}.tutor-source small{display:block;color:#52665b;font-size:.8rem}.tutor-full-answer{font-weight:600}@media(max-width:600px){.tutor-next .primary{min-width:130px}.student-tutor-heading{flex-wrap:wrap}.student-tutor-heading button{font-size:.9rem}.source-sentence-pair{padding:8px 0}}.tutor-source-actions{position:sticky;top:12px;background:#fff;border-radius:8px;z-index:2}.tutor-reading-dialog{box-sizing:border-box;width:min(740px,calc(100vw - 28px));max-height:90vh;max-height:90svh;border:1px solid #cbded1;border-radius:16px;padding:0;color:inherit;overflow:hidden;box-shadow:0 20px 80px #132c2533}.tutor-reading-dialog[open]{display:flex;flex-direction:column}.tutor-reading-dialog::backdrop{background:#182c2580}.tutor-reading-dialog header,.tutor-reading-dialog footer{padding:14px 20px;background:#fff;flex-shrink:0}.tutor-reading-dialog header h3{margin:0;font-size:1.1rem}.reading-current-question{margin:6px 0;font-size:.95rem}.tutor-reading-dialog .tutor-source-actions{position:static}.tutor-reading-scroll{overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;padding:0 20px;min-height:0;line-height:1.8}.tutor-reading-dialog footer{border-top:1px solid #dce5e0;display:flex;align-items:center;justify-content:space-between;gap:16px}.tutor-reading-dialog button{min-height:44px}.tutor-reading-dialog .button.primary{min-width:120px}.tutor-reading-dialog small{display:block;font-size:.8rem;color:#52665b}.tutor-secondary-actions{display:flex;flex-wrap:wrap;gap:8px}.student-tutor .tutor-more{margin:6px 0}.student-tutor .student-tutor-heading .tutor-link{min-width:0}body:has(.tutor-reading-dialog[open]){overflow:hidden}@media(max-width:600px){.tutor-reading-dialog header,.tutor-reading-dialog footer{padding:12px 14px}.tutor-reading-scroll{padding:0 14px}.tutor-reading-dialog{width:calc(100vw - 20px)}.reading-current-question{font-size:.85rem}}.textbook-course.student-reading-course{max-width:1280px;width:100%;box-sizing:border-box}.student-reading-shell{container-type:inline-size;container-name:study-material}.student-reading-layout,.student-question-pane{min-width:0}.student-question-pane>progress{display:block}.student-reading-layout>.tutor-source{margin:0 0 14px;min-width:0}body:has(.tutor-reading-dialog[open]){overflow:auto}body:has(.reading-fullscreen-dialog[open]){overflow:hidden}.tutor-reading-dialog.reading-split-dialog{position:static;width:100%;height:var(--reading-height,70dvh);max-height:none;margin:0;box-shadow:none;border-radius:12px;background:#fafcfb}.tutor-reading-dialog.reading-fullscreen-dialog{position:fixed;top:0;right:0;bottom:0;left:0;width:100vw;height:100dvh;max-width:none;max-height:none;margin:0;border:0;border-radius:0;box-shadow:none;background:#fff;padding-top:env(safe-area-inset-top)}.tutor-reading-dialog header,.tutor-reading-dialog footer{padding:12px 16px}.reading-current-question{font-size:.85rem;color:#52665b}.tutor-reading-scroll{padding:0 16px;scrollbar-gutter:stable;outline-offset:-3px}.tutor-reading-dialog footer{padding-bottom:max(12px,env(safe-area-inset-bottom));flex-wrap:wrap}.tutor-reading-dialog .reading-source-status small{font-size:.8rem}.tutor-reading-dialog .reading-source-status button{padding:0 6px;min-height:44px}.source-english-row{display:flex;align-items:flex-start;gap:6px}.source-english-row p{flex:1;min-width:0;overflow-wrap:normal}.source-sentence-play{flex:0 0 44px;width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;background:transparent;border:0;color:#34644e;border-radius:8px}.source-sentence-play:hover,.source-sentence-play:focus-visible{background:#e3eee7}.source-sentence-pair [lang=zh-CN]{padding-right:12px}.source-sentence-pair{scroll-margin-top:8px}.reading-audio-dock{padding:8px 16px;border-top:1px solid #dce5e0;flex-shrink:0}.reading-audio-dock .paragraph-player{margin:4px 0;padding:8px;border:0;background:transparent}.reading-audio-dock h2{display:none}.reading-audio-dock p{margin:4px 0;font-size:.85rem}.reading-audio-dock select{min-height:44px}.reading-audio-dock .library-actions{gap:8px}.student-reading-course .student-tutor>.button.primary{background:transparent;color:#245b46;border:1px solid #8daf9b;min-width:0}@container study-material (min-width:860px){.student-reading-layout:has(>.tutor-source[data-reading-open=true]){display:grid;grid-template-columns:minmax(300px,.8fr) minmax(400px,1.2fr);gap:24px;align-items:start}.student-reading-layout:has(>.tutor-source[data-reading-open=true])>.tutor-source{position:sticky;top:16px;margin:0}.student-reading-layout:has(>.tutor-source[data-reading-open=false])>.tutor-source{margin-bottom:14px}.student-reading-layout .student-question-stem{margin-top:18px}}.tutor-reading-scroll{overflow-anchor:none}.approved-student-shell{display:block;min-height:100vh;background:#f8f6f0;color:#262437;font-family:system-ui,-apple-system,Segoe UI,Microsoft YaHei,sans-serif;font-size:18px;line-height:1.65;--accent:#5743a5}.approved-student-shell>.sidebar,.approved-student-shell>.mobile-header{display:none}.approved-student-shell>#main-content{margin:0;padding:0;max-width:none;width:100%}.beginner-brand{display:block;padding:14px max(18px,calc((100vw - 1100px)/2));background:#fff;border-bottom:1px solid #e5e0ec;font-size:22px;font-weight:850;color:#262437;text-decoration:none}.beginner-brand span{font-size:15px;color:#5743a5}.approved-student-shell>.bottom-nav{display:block;position:fixed;z-index:15;bottom:0;left:0;right:0;background:#fff;border-top:1px solid #e5e0ec;padding-bottom:env(safe-area-inset-bottom)}.approved-student-shell .bottom-nav nav{max-width:760px;margin:auto;display:grid;grid-template-columns:repeat(5,1fr)}.approved-student-shell .bottom-nav .nav-item{font-size:12px;min-height:64px;display:flex;align-items:center;justify-content:center;flex-direction:column;padding:5px;color:#6e6a79}.approved-student-shell .bottom-nav .nav-item.active{color:#5743a5;background:#f3f0fa}.beginner-page{max-width:760px;margin:auto;padding:30px 22px 245px;min-height:75vh}.beginner-page h1{font-size:30px;line-height:1.3;letter-spacing:-.5px;margin:10px 0 18px}.beginner-page h2{font-size:23px;line-height:1.4}.beginner-page p{margin:12px 0}.beginner-eyebrow{color:#5743a5;font-size:14px;font-weight:750;letter-spacing:.7px}.beginner-caption{color:#6e6a79;font-size:14px}.beginner-card{background:#fff;border:1px solid #e5e0ec;border-radius:23px;padding:25px;margin:20px 0;box-shadow:0 8px 25px #332a4a04}.beginner-hero{background:#eee9fa;border-color:#e0d8f5}.beginner-hero h2{font-size:29px;margin:8px 0}.beginner-page button,.beginner-page .button{font:inherit;min-height:48px;border:1px solid #e5e0ec;border-radius:14px;padding:10px 16px;background:#fff;color:inherit;cursor:pointer;touch-action:manipulation;white-space:normal;text-align:center;max-width:100%}.beginner-page .button.primary{background:#5743a5;border-color:#5743a5;color:#fff;font-weight:750;box-shadow:0 4px 12px #5743a51c}.beginner-page .button.secondary{background:#f3f0fa;border-color:#ded6f3;color:#5743a5}.beginner-page button:disabled{opacity:.5;cursor:default}.beginner-page button:focus-visible,.beginner-page a:focus-visible,.beginner-page textarea:focus-visible{outline:3px solid #a492db;outline-offset:3px}.beginner-page a{color:#5743a5}.beginner-page a.button.primary{color:#fff}.beginner-page .beginner-quiet{background:transparent;border:0;color:#5743a5;padding:8px 4px;font-size:15px}.beginner-page .beginner-focus-word{font-size:48px;line-height:1.3;overflow-wrap:anywhere;margin:18px 0 6px;letter-spacing:-1px}.beginner-meaning{font-size:23px}.beginner-ipa{font-size:19px;color:#5743a5;letter-spacing:1px}.beginner-flow{display:flex;gap:7px;flex-wrap:wrap;margin:20px 0;font-size:13px;color:#6e6a79}.beginner-flow span{background:#fff;padding:5px 9px;border-radius:9px}.beginner-flow [aria-current]{background:#e6ddf6;color:#493391}.beginner-toolbar{position:sticky;top:0;z-index:3;background:#f8f6f0f5;padding:8px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px}.beginner-english{font-size:22px;line-height:1.7;overflow-wrap:anywhere}.beginner-page .beginner-zh{font-size:17px;color:#625c71;margin:0 0 19px}.beginner-passage{margin:25px 0 34px}.beginner-recall{font-size:25px;line-height:1.8}.beginner-page .beginner-notice{border-left:3px solid #b4a5d4;padding:12px 16px;background:#f5f1fb;border-radius:0 12px 12px 0;font-size:15px}.beginner-options{display:grid;gap:10px;margin:20px 0}.beginner-options button{text-align:left;padding:15px 17px}.beginner-options [aria-pressed=true]{border:2px solid #5743a5;background:#f0eafa}.beginner-page textarea{font:inherit;width:100%;min-height:110px;border:1px solid #bcb5cc;border-radius:14px;padding:14px;background:#fff;color:inherit;resize:vertical}.beginner-page label{display:block;margin:14px 0}.beginner-page select{max-width:100%;font:inherit}.beginner-footer{position:fixed;z-index:10;bottom:calc(64px + env(safe-area-inset-bottom));left:0;right:0;background:#fffffff5;border-top:1px solid #e5e0ec;padding:12px max(18px,calc((100vw - 716px)/2));-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.beginner-footer-inner{display:grid;grid-template-columns:65px 1fr;align-items:center;gap:14px}.beginner-footer .primary{width:100%}.beginner-page:has(.daily-follow[aria-label=课文朗读]) .beginner-footer{display:none}.beginner-units{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.beginner-units a{padding:15px;background:#f3f0fa;border-radius:14px;text-decoration:none;display:grid;gap:3px}.beginner-units span{font-size:14px;overflow-wrap:anywhere}.beginner-secondary-links{display:flex;gap:18px;flex-wrap:wrap}.beginner-source{font-size:14px;color:#6e6a79;margin-top:22px}.beginner-page .daily-follow{background:#fff;border:1px solid #e5e0ec;border-radius:23px;padding:25px;margin:20px 0}.beginner-page .daily-follow-sentence{font-size:25px}.beginner-page .student-practice{max-width:100%}.beginner-page .daily-follow>.daily-follow-actions:first-of-type{position:fixed;z-index:10;bottom:calc(64px + env(safe-area-inset-bottom));left:0;right:0;background:#fffffff5;border-top:1px solid #e5e0ec;padding:12px max(18px,calc((100vw - 716px)/2));display:flex;flex-direction:row-reverse;gap:10px;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.beginner-page .daily-follow>.daily-follow-actions:first-of-type .primary{flex:1}.beginner-page .daily-follow>.daily-follow-actions:first-of-type .secondary{font-size:14px}.beginner-page .daily-follow[data-daily-phase=COMPLETED]>.daily-follow-actions:first-of-type{position:static;flex-direction:row;padding:0;border:0}@media(min-width:1000px){.beginner-page{max-width:900px;padding-top:40px}.beginner-card{padding:30px}.beginner-home-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:20px}.beginner-home-grid .beginner-card{margin-top:0}.beginner-page h1{font-size:36px}.beginner-units{grid-template-columns:repeat(4,minmax(0,1fr))}}@media(max-width:430px){.beginner-page{padding:22px 18px 245px}.beginner-page h1{font-size:28px}.beginner-card{padding:20px;margin:16px 0}.beginner-page .beginner-focus-word{font-size:42px}.beginner-brand{padding:10px 18px}.beginner-english{font-size:21px}.beginner-footer-inner{gap:8px;grid-template-columns:58px 1fr}.beginner-page button{padding:10px 13px}}@media(prefers-reduced-motion:no-preference){.beginner-card{animation:beginner-enter .18s ease-out}@keyframes beginner-enter{0%{opacity:.4;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}}.app-shell.student-shell{display:grid;grid-template-columns:minmax(0,1fr);grid-template-areas:"header" "content";min-height:100vh;min-height:100dvh;align-items:start}.student-shell>.student-app-header{grid-area:header;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 24px;background:#fff;border-bottom:1px solid #e5e0ec;min-width:0}.student-shell .beginner-brand{display:inline-flex;align-items:baseline;gap:7px;padding:0;border:0;font-size:22px;white-space:nowrap;flex-shrink:0}.student-shell>.student-navigation{display:none}.student-shell>#main-content{grid-area:content;min-width:0;width:100%;margin:0;padding:0}.student-shell .student-exit{font-size:15px;color:#5743a5;min-height:48px;display:flex;align-items:center}.student-shell .beginner-page{width:100%;max-width:1100px;margin-inline:auto;padding:28px clamp(18px,3vw,40px) 120px;min-height:0}.student-learning-shell .beginner-page{padding-bottom:calc(var(--learning-action-height,88px) + 36px + env(safe-area-inset-bottom))}.student-learning-shell .beginner-flow{margin:14px 0}.student-learning-shell .beginner-card{margin-block:18px}.student-learning-shell .beginner-footer,.student-learning-shell .daily-follow>.daily-follow-actions:first-of-type{bottom:0;max-width:none;margin:0;padding:12px max(18px,calc((100vw - 1020px)/2)) calc(12px + env(safe-area-inset-bottom));min-height:76px}.student-learning-shell .beginner-footer-inner{grid-template-columns:84px minmax(0,1fr)}.student-learning-shell .beginner-word-layout{max-width:760px;margin-inline:auto}.student-learning-shell .beginner-source{padding:16px 0}.student-learning-shell textarea,.student-learning-shell input{scroll-margin-block:90px}.student-shell .beginner-page .beginner-caption{font-size:15px}.student-shell .beginner-secondary-links a{min-height:48px;display:inline-flex;align-items:center}.student-shell .beginner-page button,.student-shell .beginner-page summary{touch-action:manipulation}.student-shell .beginner-page summary{min-height:48px;cursor:pointer;padding-block:10px}.student-shell .beginner-page :is(p,h1,h2,h3,label,span){overflow-wrap:break-word}.student-learning-shell[data-keyboard-open=true] .beginner-footer,.student-learning-shell[data-keyboard-open=true] .daily-follow>.daily-follow-actions:first-of-type{position:static;padding:12px 0;border:0}@media(min-width:1100px){.app-shell.student-shell{grid-template-columns:200px minmax(0,1fr);grid-template-areas:"header header" "navigation content"}.student-shell>.student-navigation{grid-area:navigation;display:flex;position:sticky;top:0;height:calc(100vh - 76px);height:calc(100dvh - 76px);padding:24px 14px}.student-shell .student-navigation .nav-item{flex-direction:row;justify-content:flex-start;font-size:17px;gap:12px;padding:12px}.student-shell>.bottom-nav{display:none}.student-shell .beginner-page{padding-bottom:48px}.app-shell.student-learning-shell{grid-template-columns:minmax(0,1fr);grid-template-areas:"header" "content"}.student-learning-shell>.student-navigation{display:none}.student-learning-shell .beginner-footer,.student-learning-shell .daily-follow>.daily-follow-actions:first-of-type{position:sticky;padding:16px 0;background:#f8f6f0f5;border:0}.student-learning-shell .beginner-page{padding-bottom:42px}.student-reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:24px;align-items:start}.student-reading-layout>.beginner-card{margin-top:0}.student-reading-layout>aside{position:sticky;top:90px}}@media(min-width:960px)and (max-width:1099px)and (orientation:landscape){.student-reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:20px;align-items:start}.student-reading-layout>.beginner-card{margin-top:0}}@media(max-width:600px){.student-shell>.student-app-header{padding:10px 18px}.student-shell .student-exit{font-size:14px}.student-shell .beginner-page{padding-top:20px}.student-learning-shell .beginner-page h1{font-size:28px}.student-learning-shell .beginner-focus-word{font-size:44px}.student-learning-shell .beginner-card{padding:20px}.student-learning-shell .beginner-footer-inner{grid-template-columns:70px minmax(0,1fr)}}@media(max-height:550px){.student-learning-shell .beginner-footer,.student-learning-shell .daily-follow>.daily-follow-actions:first-of-type{position:static;padding:12px 0;border:0}.student-learning-shell .beginner-page{padding-bottom:24px}}.word-teaching{max-width:760px;margin-inline:auto!important}.word-teaching .beginner-focus-word{margin-top:0}.word-example{border-top:1px solid #e5e0ec;margin-top:18px;padding-top:8px}.phonics-help{margin-top:14px;border-block:1px solid #e5e0ec;padding-block:6px}.phonics-help p{font-size:17px;line-height:1.65}.phonics-chunks{display:flex;gap:12px;flex-wrap:wrap}.phonics-chunks>div{display:grid;gap:6px;background:#f3f0fa;border-radius:12px;padding:12px;min-width:90px}.phonics-chunks strong{font-size:24px}.phonics-chunks span{font-size:20px}.phonics-chunks small{color:#5743a5}.active-word-recall{margin:24px 0}.active-word-recall input{font:inherit;width:100%;min-height:48px;padding:12px;border:1px solid #bcb5cc;border-radius:12px;margin-bottom:12px}.student-learning-shell .reading-help h2{font-size:23px}.student-learning-shell .daily-follow-actions{flex-wrap:wrap}.student-learning-shell .daily-follow-actions button{min-height:48px}.student-learning-shell .daily-follow-primary{flex-wrap:nowrap}.student-learning-shell .daily-follow-primary>button{min-width:0}.student-learning-shell .beginner-flow{display:flex;flex-wrap:nowrap;gap:8px;overflow-x:auto;max-width:100%;min-width:0;padding:5px 2px 10px;scroll-padding-inline:12px;overscroll-behavior-x:contain}.student-learning-shell .beginner-flow button{flex:0 0 auto;min-height:48px;padding:10px 14px;font-size:15px;white-space:nowrap;border:1px solid #e5e0ec;background:#fff;color:#625c71}.student-learning-shell .beginner-flow button[aria-current=step]{background:#e6ddf6;border-color:#9d8acb;color:#493391;font-weight:750}.student-learning-shell .beginner-flow .stage-complete-mark{background:none;padding:0 0 0 5px;color:#526f54}.beginner-home-actions{margin-top:18px;border-top:1px solid #ded6f3;padding-top:10px;display:grid;gap:10px}.beginner-home-actions p{margin:0}.beginner-home-actions>.beginner-quiet{justify-self:start;text-align:left}.home-stage-choices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.home-stage-choices a{display:flex;align-items:center;justify-content:center;min-height:48px;background:#fff;border:1px solid #ded6f3;border-radius:12px;padding:10px;text-decoration:none;font-size:15px;text-align:center}@media(min-width:1100px){.student-learning-shell .beginner-flow button{flex:1 0 auto}.home-stage-choices{grid-template-columns:repeat(3,minmax(0,1fr))}}.phonics-step-nav{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0}.phonics-step-nav button{min-height:44px;flex:1 1 100px;white-space:normal;font-size:15px;padding:8px}.phonics-step-nav button[aria-pressed=true]{background:#eee7fb;border-color:#7a64ba}.phonics-step{overflow-wrap:anywhere}.phonics-step p{margin-block:10px}.vocabulary-guided{margin-block:14px;border-block:1px solid #e5e0ec;padding-block:6px}.vocabulary-guided input{display:block;box-sizing:border-box;width:100%;max-width:100%;font:inherit;padding:10px;min-height:48px;margin-block:8px;scroll-margin-block:130px}.vocabulary-guided>button{margin:5px 5px 5px 0;min-height:44px}.vocabulary-guided p,.phonics-step span{overflow-wrap:anywhere}.phonics-help .phonics-chunks{gap:7px}.phonics-help .phonics-chunks>div{min-width:0;flex:0 1 auto;padding:9px;max-width:100%;box-sizing:border-box}.phonics-help .phonics-chunks strong{font-size:22px}.phonics-help .phonics-chunks span{font-size:18px}.vocabulary-guided .study-actions{gap:8px;flex-wrap:wrap}.student-learning-shell .vocabulary-footer .vocabulary-navigation{grid-template-columns:minmax(108px,1fr) minmax(0,2fr)}.vocabulary-navigation>.secondary{white-space:nowrap;padding-inline:10px}.practice-page .practice-card{max-width:780px;margin:20px auto}.practice-config{display:grid;grid-template-columns:100px minmax(0,1fr);align-items:center;gap:16px;margin-bottom:20px}.practice-config select,.practice-answer-input input{font:inherit;width:100%;min-height:48px;border:1px solid #cbd5e1;border-radius:12px;padding:10px 14px;background:#fff;box-sizing:border-box}.practice-answer-input{display:grid;gap:10px;margin:24px 0}.practice-options{border:0;padding:0;margin:24px 0;display:grid;gap:12px;min-width:0}.practice-options legend{margin-bottom:12px}.practice-options label{display:flex;align-items:center;gap:12px;border:1px solid #cbd5e1;border-radius:12px;padding:12px;min-height:48px;cursor:pointer}.practice-options input{width:20px;height:20px;flex-shrink:0}.practice-options span{overflow-wrap:anywhere}.practice-progress{font-weight:600;color:#29664f}.practice-generating li{margin:12px 0}.practice-feedback ol{padding-left:24px;line-height:1.9}.practice-feedback p,.practice-feedback li{overflow-wrap:anywhere}.practice-card .button{min-height:48px}.practice-card form{min-width:0}.practice-card .homework-reference-answer{padding:16px;border-radius:12px;margin:16px 0}.practice-card .homework-actions{margin-top:20px}@media(max-width:600px){.practice-config{grid-template-columns:1fr;gap:8px}.practice-config select{margin-bottom:12px}.practice-page .practice-card{padding:20px}.practice-card .homework-actions .button{flex:1 1 100px}}.practice-export{white-space:pre-wrap;overflow-wrap:anywhere;max-width:100%;font-size:12px}.learning-activity-card h3,.learning-activity-page h1{overflow-wrap:anywhere}.learning-activity-card .study-actions{flex-wrap:wrap;gap:.5rem}.learning-source-page{display:block;width:100%;max-width:900px;height:auto;margin:1rem auto}.learning-activity-page pre{font-family:inherit}@media(max-width:600px){.learning-activity-card{display:flex;flex-direction:column;align-items:stretch}.learning-activity-card .study-actions .button{flex:1;text-align:center}.learning-activity-page .study-actions{display:flex;flex-wrap:wrap}.learning-activity-page h1{font-size:1.5rem}}.english-page button{cursor:pointer;font:inherit}.english-page button:disabled{opacity:.45;cursor:not-allowed}.english-page button:focus-visible,.english-page input:focus-visible,.english-page select:focus-visible{outline:3px solid var(--primary);outline-offset:3px}.english-page .button{border:1px solid var(--border)}.english-page .primary{border-color:var(--primary)}.english-back{display:inline-flex;align-items:center;gap:8px;min-height:44px;color:var(--primary);margin-bottom:20px}.english-heading{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px}.english-heading p,.english-page .muted{color:var(--text-secondary)}.english-heading p{margin-top:8px}.continue-card{display:grid;gap:24px;padding:24px;background:#edf4ef;border:1px solid var(--border);border-radius:var(--radius)}.continue-card h2{margin:8px 0}.continue-card progress{margin-top:16px}.english-entry-grid,.word-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:16px;margin-top:24px}.english-entry{display:block;padding:24px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}.english-entry h2{margin:16px 0 8px}.english-entry p{color:var(--text-secondary)}.entry-action{display:flex;align-items:center;justify-content:space-between;color:var(--primary);margin-top:24px;font-weight:600}.word-display-options{background:#fff;border:1px solid var(--border);border-radius:16px;padding:16px;display:grid;gap:8px}.word-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px;min-width:0}.word-card h2{font-size:1.5rem;overflow-wrap:anywhere}.word-card-top{display:flex;justify-content:space-between;align-items:center;gap:8px}.word-card p{margin-top:8px}.english-page .ipa{font-family:Segoe UI,Lucida Sans Unicode,Arial Unicode MS,Arial,sans-serif;color:var(--text-secondary);overflow-wrap:anywhere}.icon-button{width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:12px;background:#fff;color:var(--primary)}.word-card small{display:block;margin-top:12px}.mistake-badge{display:inline-block;background:#f6f0e2;color:#785c25;padding:6px 12px;border-radius:8px;margin-top:16px}.follow-layout{display:grid;gap:20px}.follow-list{display:none}.follow-study{border:1px solid var(--border);border-radius:var(--radius);background:#fff;padding:28px 20px;text-align:center;min-width:0}.follow-word{min-height:180px;display:flex;flex-direction:column;justify-content:center;gap:16px}.follow-word h2{font-size:clamp(2rem,5vw,3.25rem);line-height:1.2;overflow-wrap:anywhere}.follow-word .ipa{font-size:1.2rem}.word-meaning{font-size:1.15rem}.play-button{display:inline-flex;align-items:center;justify-content:center;gap:12px;border:0;background:var(--primary);color:#fff;border-radius:18px;min-height:64px;min-width:150px;padding:16px 24px}.play-status{color:var(--text-secondary);margin:16px 0;min-height:26px;font-size:.875rem}.engine-buttons{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:12px}.stop-button{min-height:52px;padding:12px 16px}.execution-status{margin:20px 0;min-height:112px;overflow-wrap:anywhere}.execution-caption,.execution-detail,.execution-progress{font-size:.875rem;color:var(--text-secondary)}.execution-title{margin:6px 0;color:var(--primary);font-weight:600}.execution-countdown{font-size:1.5rem;font-variant-numeric:tabular-nums}.execution-progress{margin-top:8px}.word-position{font-size:1rem;font-weight:600;margin:12px}.follow-controls{max-width:440px;margin:auto}.previous-next{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}.previous-next .button{padding:12px 8px}.follow-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:24px}.follow-actions .button{flex:1}.plan-summary{margin:24px 0 8px;color:var(--primary);overflow-wrap:anywhere}.follow-study>.muted{font-size:.875rem}.follow-list-items{display:flex;flex-direction:column;gap:4px}.follow-list-items button{display:flex;justify-content:space-between;align-items:center;gap:8px;background:transparent;border:0;border-radius:10px;min-height:48px;padding:10px 12px;text-align:left;min-width:0}.follow-list-items button span{overflow-wrap:anywhere}.follow-list-items small{color:var(--text-secondary)}.follow-list-items .selected-word{background:#eaf2ed;color:var(--primary);font-weight:650;border-left:3px solid var(--primary)}.settings-dialog,.word-list-dialog{border:1px solid var(--border);background:var(--surface);color:var(--text-primary);padding:0;width:100%;max-width:100%;max-height:100dvh;height:100dvh;margin:0;position:fixed;top:0;right:0;bottom:0;left:0;border-radius:0}.settings-dialog::backdrop,.word-list-dialog::backdrop{background:#162b2466}.settings-dialog,.word-list-dialog{text-align:left}html:has(.english-page dialog[open]){overflow:hidden}.settings-dialog[open]{display:flex;flex-direction:column}.dialog-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:calc(16px + env(safe-area-inset-top)) 20px 16px;border-bottom:1px solid var(--border);flex-shrink:0}.settings-content{overflow-y:auto;overscroll-behavior:contain;min-height:0;padding:20px}.settings-content fieldset{margin:24px 0;border:1px solid var(--border);padding:16px;border-radius:14px;min-width:0}.settings-content legend{font-weight:650;padding:0 8px}.setting-toggle{display:flex;align-items:center;gap:10px;min-height:48px;padding:8px 0;cursor:pointer}.setting-toggle>span:first-child{flex:1;min-width:0}.setting-toggle small{display:block;font-size:.875rem;line-height:1.5;color:var(--text-secondary);margin-top:4px}.setting-toggle input{width:22px;height:22px;accent-color:var(--primary);flex-shrink:0}.toggle-status{font-size:.875rem;color:var(--text-secondary)}.select-row{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;min-height:48px}.select-row select{min-height:44px;max-width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--text-primary);font:inherit}.sequence-preview{margin-top:16px;padding:12px;background:#edf4ef;border-radius:10px;color:var(--primary)}.number-control{display:grid;grid-template-columns:minmax(0,1fr);gap:8px;margin:16px 0}.number-stepper{display:flex;align-items:center;justify-content:space-between;gap:8px}.number-stepper button{width:44px;height:44px;border:1px solid var(--border);border-radius:10px;background:#fff}.number-stepper output{font-weight:600}.number-control input{width:100%;height:44px;accent-color:var(--primary);min-width:0}.dialog-footer{padding:16px 20px calc(16px + env(safe-area-inset-bottom));border-top:1px solid var(--border);flex-shrink:0}.dialog-footer .button{width:100%}.word-list-dialog{overflow-y:auto;padding:0 16px 24px}.word-list-dialog .dialog-header{padding-left:0;padding-right:0;margin-bottom:16px}.dictation-card{max-width:640px;margin:auto;padding:24px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);display:grid;gap:20px}.dictation-card form{display:grid;gap:12px}.dictation-card input{width:100%;min-height:52px;padding:12px;border:1px solid var(--border);border-radius:10px;font:inherit}.dictation-result{padding:16px;background:#edf4ef;border-radius:12px}.dictation-card{min-width:0;overflow-wrap:anywhere}.dictation-actions{display:flex;flex-wrap:wrap;gap:12px}.dictation-actions .button{flex:1 1 130px}.dictation-score{font-variant-numeric:tabular-nums;color:var(--text-secondary)}.dictation-error{color:#963c30;background:#fff2ed;padding:14px;border:1px solid #e6c2b8;border-radius:12px;overflow-wrap:anywhere}.dictation-hint{background:#f3f5ee;padding:14px;border-radius:12px}.answer-wrong{background:#fff3ed;border:1px solid #e6c2b8}.answer-correct{border:1px solid #bdd6c8}.dictation-settings{max-width:640px;margin:24px auto;border:1px solid var(--border);border-radius:14px;padding:16px;background:var(--surface)}.dictation-settings summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-weight:600}.dictation-settings-grid{display:grid;gap:16px;margin:16px 0}.dictation-settings label{display:grid;gap:8px;min-width:0}.dictation-settings select{min-height:44px;width:100%;font:inherit;border:1px solid var(--border);border-radius:10px;background:#fff;padding:8px}.dictation-settings input[type=range]{width:100%;min-width:0;height:44px;accent-color:var(--primary)}.dictation-settings .setting-toggle{display:flex;justify-content:space-between;min-height:48px}.dictation-settings input[type=checkbox]{width:22px;height:22px;accent-color:var(--primary)}.learning-storage-note{max-width:640px;margin:24px auto;font-size:.875rem;line-height:1.6;color:var(--text-secondary)}.mistake-filters{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px}.mistake-filters [aria-pressed=true]{background:#eaf2ed;border-color:var(--primary);color:var(--primary)}.word-card .button{margin-top:16px}@media(max-width:767px){.dictation-card{padding:20px 16px}.dictation-card input,.dictation-card form{scroll-margin-bottom:110px}}@media(min-width:768px){.dictation-settings-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.recitation-card{max-width:640px;margin:24px auto;padding:28px;display:grid;gap:20px;border:1px solid var(--border);border-radius:var(--radius);background:#fff;min-width:0;overflow-wrap:anywhere}.recitation-disclaimer{max-width:640px;margin:auto;color:var(--text-secondary)}.recitation-mode-label{color:var(--primary);font-weight:600}.recitation-prompt{min-height:150px;display:flex;flex-direction:column;justify-content:center;gap:16px;text-align:center}.recitation-prompt h2{font-size:clamp(1.6rem,5vw,2.6rem);line-height:1.4}.recitation-answer{display:grid;gap:10px;border:1px solid var(--border);border-radius:12px;padding:20px;background:#f5f8f6}.recitation-answer h3{font-size:1.6rem}.recitation-ratings,.recitation-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.recitation-ratings .button{min-height:52px;padding:12px 8px}.rating-known{background:#edf4ef}.rating-uncertain{background:#f6f0e2}.rating-unknown{background:#fff2ed}.recitation-summary{text-align:center;padding:20px 8px;background:#f5f8f6;border-radius:12px}.recitation-summary strong{display:block;font-size:1.75rem}.recitation-summary-actions,.mistake-review-actions{display:flex;flex-wrap:wrap;gap:12px}.recitation-summary-actions .button{flex:1 1 160px}.recitation-page .learning-storage-note{max-width:640px}.recitation-settings .settings-content{overflow-wrap:anywhere}.review-choice summary{cursor:pointer;list-style:none}.review-choice[open] .mistake-review-actions{margin-top:12px}.word-card .mistake-review-actions{margin-top:16px}.word-card .mistake-review-actions .button{flex:1 1 120px}.word-card .recitation-word-link{margin-top:16px}@media(max-width:767px){.recitation-card{padding:24px 16px}.recitation-ratings{gap:8px}}@media(min-width:768px){.continue-card{grid-template-columns:minmax(0,1fr) auto;align-items:center}.english-entry-grid,.word-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.word-display-options{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.word-display-options .select-row{display:block}.word-display-options select{display:block;margin-top:8px;width:100%}.follow-study{padding:36px}.follow-word{min-height:220px}.follow-actions .button{flex:0 1 220px}.settings-dialog,.word-list-dialog{width:min(560px,calc(100% - 48px));max-width:560px;height:auto;max-height:calc(100dvh - 48px);margin:auto;border-radius:20px}.settings-content{padding:24px}.word-list-dialog{height:min(680px,calc(100dvh - 48px))}}@media(min-width:1024px){.follow-layout{grid-template-columns:minmax(170px,.7fr) minmax(0,2fr)}.follow-list{display:block;background:#fff;border:1px solid var(--border);border-radius:16px;padding:16px;max-height:720px;overflow-y:auto}.follow-list h2{font-size:1rem;margin:8px 12px 16px}.mobile-list-button{display:none!important}.follow-study{padding:36px 24px}.follow-word{min-height:240px}}@media(min-width:1366px){.word-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(prefers-reduced-motion:reduce){.english-page *{scroll-behavior:auto;transition:none;animation:none}}.recitation-settings .icon-button,.recitation-settings .number-stepper button{min-width:48px;min-height:48px}.read-write-card{max-width:640px;margin:24px auto;padding:28px;display:grid;gap:20px;border:1px solid var(--border);border-radius:var(--radius);background:#fff;min-width:0;overflow-wrap:anywhere}.read-write-card form{display:grid;gap:12px}.read-write-card input:not([type]){width:100%;min-width:0;min-height:52px;border:1px solid var(--border);border-radius:12px;padding:12px 14px;font-size:18px;background:#fff}.read-write-card input:focus{outline:3px solid var(--primary);outline-offset:2px}.read-write-summary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;text-align:center;background:#f5f8f6;padding:20px;border-radius:12px}.read-write-summary strong{display:block;font-size:1.75rem}.read-write-settings .icon-button,.read-write-settings .number-stepper button{min-width:48px;min-height:48px}.mastery-dimensions{margin:12px 0;color:var(--text-secondary)}@media(max-width:767px){.read-write-card{padding:24px 16px}}.textbook-unit-selector label{display:grid;gap:8px;margin:12px 0}.textbook-unit-selector input,.textbook-unit-selector select{font:inherit;width:100%;min-width:0;max-width:100%;min-height:48px;border:1px solid var(--border);border-radius:10px;padding:10px 12px;background:var(--surface);color:var(--text-primary)}.textbook-sections .study-unit-card{text-align:left;min-width:0;cursor:pointer}.textbook-sections .study-unit-card[aria-pressed=true]{border:2px solid #26734e}.textbook-settings{overflow-wrap:anywhere}.textbook-settings button,.textbook-settings summary{min-height:44px}.textbook-settings summary{cursor:pointer;padding:12px}.textbook-study{max-width:1120px;margin:auto;overflow-wrap:anywhere}.study-unit-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:24px}.study-unit-card{display:flex;flex-direction:column;gap:9px;padding:22px;border:1px solid #d9e8dd;border-radius:16px;background:#fff;color:#205739;text-decoration:none;min-height:120px}.study-unit-card strong{font-size:1.2rem}.study-unit-card small{color:#5b7165}.study-actions{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}.textbook-study button,.textbook-study select,.textbook-study .button,.study-vocabulary-row button,.study-vocabulary-row summary,.study-tabs a{min-height:44px}.textbook-study input,.textbook-study select,.textbook-study textarea{max-width:100%;padding:10px;border:1px solid #c9dace;border-radius:9px}.textbook-study textarea{display:block;width:100%;box-sizing:border-box;margin:12px 0}.study-tabs{display:flex;flex-wrap:wrap;gap:6px;margin:20px 0}.study-tabs a{display:flex;align-items:center;padding:8px 14px;color:#28533c;background:#edf5ef;border-radius:10px;text-decoration:none}.study-tabs a[aria-current=page]{background:#26734e;color:#fff}.study-vocabulary-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0}.study-vocabulary-row{background:#fff;border:1px solid #dce8df;border-radius:14px;padding:16px;display:flex;align-items:start;justify-content:space-between;gap:10px;min-width:0}.study-vocabulary-row h3{margin:0;font-size:1.3rem}.study-vocabulary-row p{margin:8px 0}.study-vocabulary-row details{margin-top:12px}.study-article-list{display:grid;gap:14px}.study-article-list p{line-height:1.8;white-space:pre-wrap}.study-stat-grid{display:flex;flex-wrap:wrap;gap:12px}.study-stat-grid span{padding:16px;background:#eaf5ee;border-radius:12px}.study-reader-viewport{overflow:clip;overflow-clip-margin:1px;background:#e3e9e4;border:1px solid #cbd8cd;touch-action:pan-x pan-y}.study-reader-viewport img{display:block;max-width:none;height:auto;margin:auto}.study-thumbnails{display:flex;overflow:auto;gap:8px}.study-thumbnails button{flex-shrink:0;background:#fff;border:1px solid #d5e1d7;padding:6px}.study-thumbnails img{display:block;width:80px;height:112px;object-fit:contain}.study-reader-controls{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:16px 0}.study-reader-controls input{width:80px}.study-reader-controls select{flex:1;min-width:140px}.study-lesson-card{display:flex;gap:12px;align-items:center;justify-content:space-between;background:#fff;border:1px solid #dce8df;border-radius:14px;padding:16px;margin:12px 0}.study-lesson-card h3{margin:0 0 8px}.textbook-study details summary{cursor:pointer;line-height:1.6;padding:8px 0}.textbook-study :focus-visible{outline:3px solid #47976b;outline-offset:3px}@media(max-width:900px){.study-unit-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:560px){.study-vocabulary-list{grid-template-columns:minmax(0,1fr)}.study-unit-card{padding:16px}.study-lesson-card{align-items:start;flex-direction:column}.study-tabs a{padding:8px 11px}.study-reader-viewport{max-height:none}}.activity-workspace{min-width:0}.activity-source-text{white-space:pre-wrap;line-height:1.8}.project-step{border-top:1px solid #dce8df;padding:18px 0}.activity-option{display:flex;align-items:center;gap:10px;min-height:44px}.activity-workspace audio{width:100%;max-width:480px}.activity-workspace fieldset{min-width:0}.activity-workspace p,.activity-workspace li{overflow-wrap:anywhere}.activity-workspace .study-actions{flex-wrap:wrap}.study-reader-viewport{overflow-x:auto;overflow-y:hidden;max-height:none}.textbook-study textarea{font-size:16px;scroll-margin-bottom:110px}.activity-workspace button{min-height:44px}.student-mistake-home{max-width:1080px;margin:auto;background:#f8f6ff;color:#29233f;padding:clamp(12px,3vw,28px);border-radius:24px}.student-mistake-home .beginner-card{background:#fff;border:1px solid #e9e2fa;border-radius:22px;margin:16px 0;padding:clamp(14px,3vw,28px)}.student-mistake-home button,.student-mistake-home .button{border-radius:14px;min-height:44px}.vocabulary-review{max-width:780px;margin-inline:auto!important}.vocabulary-review input{display:block;box-sizing:border-box;width:100%;min-width:0;margin:10px 0;min-height:48px;font:inherit;padding:12px;border:1px solid #bcb5cc;border-radius:12px;background:#fff;color:#29233f}.vocabulary-correction,.vocabulary-result{background:#f3efff;border-radius:16px;padding:16px;margin-block:16px;overflow-wrap:anywhere}.student-mistake-home .study-actions{display:flex;flex-wrap:wrap;gap:10px}.student-mistake-home article{border-top:1px solid #e9e2fa;padding-block:16px}.student-mistake-home p,.student-mistake-home a{overflow-wrap:anywhere}.student-mistake-home details>summary{cursor:pointer;min-height:44px}.student-shell .student-mistake-home .button.primary{background:#7051c7;color:#fff}.student-mistake-home select{max-width:100%}@media(max-width:420px){.student-mistake-home{padding:10px}.student-mistake-home .beginner-card{padding:14px}.vocabulary-review .study-actions>*{flex:1 1 100%}}.vocabulary-review .notranslate{user-select:text;-webkit-user-select:text}.vocabulary-review .teaching-letter-parts{flex-wrap:wrap;gap:10px}.vocabulary-review .review-meaning{border-top:1px solid #ddd3ef;padding-top:12px}.vocabulary-review details{margin-block:12px}.vocabulary-review input{font-size:16px;scroll-margin-block:90px}.vocabulary-review .vocabulary-result>.button.primary{display:block;width:100%;margin-block:16px}.vocabulary-review .vocabulary-correction h3{margin-top:0}.vocabulary-review .vocabulary-correction{border-inline-start:4px solid #a28aca}.dual-learning{max-width:1000px;margin:auto}.learning-paths{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:28px 0}.learning-path{background:var(--surface,#fff);border:1px solid #dce5e5;border-radius:24px;padding:30px;display:flex;flex-direction:column;align-items:flex-start;gap:14px;box-shadow:0 8px 28px #1232}.learning-path h2,.learning-path p{margin:0}.path-number{color:#4a7770;font-weight:700}.learning-path .primary{margin-top:auto}.self-study-files{display:grid;gap:16px}.self-study-files article,.self-study-part{min-width:0}.self-study-page textarea{width:100%;min-height:170px;resize:vertical;line-height:1.8}.self-study-page input[type=file]{max-width:100%}.self-study-page pre{white-space:pre-wrap;overflow-wrap:anywhere}.activity-navigation{display:flex;gap:16px;align-items:center;flex-wrap:wrap;padding:20px 0;position:sticky;bottom:0;background:var(--surface,#fff);z-index:2;border-top:1px solid #dce5e5}.activity-navigation .button{white-space:normal}.learning-activity-page{padding-bottom:120px}.learning-activity-page p,.learning-activity-page h1{overflow-wrap:anywhere}.learning-activity-page textarea{max-width:100%}.self-study-part .study-actions{flex-wrap:wrap}.learning-path .button,.self-study-page .button{min-height:44px}.student-unit-continue{padding:28px;background:#eff8f4;border-radius:20px;margin:24px 0}.student-unit-continue h2{margin-top:0}@media(max-width:850px){.learning-path{padding:24px}.learning-activity-page .study-actions{flex-wrap:wrap}}@media(max-width:600px){.learning-paths{grid-template-columns:1fr;gap:16px;margin:20px 0}.learning-path{padding:22px;border-radius:18px}.learning-path .button{width:100%;justify-content:center}.self-study-page .study-actions{flex-direction:column;align-items:stretch}.self-study-page .study-actions>*{max-width:100%;white-space:normal}.activity-navigation{position:static}.learning-activity-page{padding-bottom:100px}.student-unit-continue{padding:20px}}.homework-example-entry,.homework-unassigned{margin:24px 0;padding:16px 20px;border:1px solid var(--border);background:#fff;border-radius:16px}.homework-example-entry summary,.homework-unassigned summary,.homework-split summary,.homework-block-trace summary{min-height:44px;cursor:pointer;display:flex;align-items:center;font-weight:600}.homework-unassigned p{white-space:pre-wrap;overflow-wrap:anywhere;margin:12px 0}.homework-confirm-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:24px}.homework-confirm-original{display:none}.homework-confirm-questions{min-width:0}.homework-input-card{min-width:0;border:1px solid var(--border);background:#fff;padding:20px;border-radius:18px;margin-bottom:20px;overflow-wrap:anywhere}.homework-input-card.selected{border-color:var(--primary)}.homework-input-heading{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:16px}.homework-input-heading button{white-space:normal;text-align:left}.homework-input-card label{display:block;font-weight:600;margin:16px 0 8px}.homework-input-card input,.homework-input-card textarea,.homework-input-card select{display:block;width:100%;min-width:0;min-height:48px;background:#fafbfa;border:1px solid #bfc9c3;border-radius:10px;padding:12px;font:inherit;color:var(--text);margin-top:8px}.homework-input-card textarea{resize:vertical;font-weight:400;line-height:1.6}.homework-input-card input{max-width:220px}.homework-warning-list{padding-left:22px;color:#765b16;font-size:.875rem;margin:14px 0;display:grid;gap:6px}.homework-input-card .homework-actions button{min-height:48px}.homework-add-question{min-height:52px;width:100%}.homework-block-trace{font-size:.875rem;color:var(--text-secondary)}.homework-block-trace p{margin:8px 0;word-break:break-all}.homework-region-image{position:relative;width:100%;margin:16px auto;line-height:0;max-width:100%}.homework-region-image img{display:block;width:100%;height:auto;margin:0!important;border-radius:8px;max-height:none}.homework-region-overlay{position:absolute;border:3px solid #286655;background:#387c5b29;pointer-events:none;border-radius:4px}.homework-region-overlay>span{position:absolute;left:0;top:0;line-height:1.4;color:#fff;background:#286655;padding:3px 6px;font-size:12px;white-space:nowrap}.homework-confirm-page .homework-mobile-original{padding:0 12px}.homework-confirm-page .homework-mobile-original summary{padding-left:8px}@media(min-width:1024px){.homework-confirm-layout{grid-template-columns:minmax(280px,.85fr) minmax(0,1.3fr);align-items:start}.homework-confirm-original{display:block;position:sticky;top:24px;background:#fff;border:1px solid var(--border);border-radius:18px;padding:20px;max-height:calc(100vh - 48px);overflow:auto}.homework-confirm-questions{max-height:calc(100vh - 48px);overflow-y:auto;padding-right:6px}.homework-confirm-original .homework-region-image{max-width:440px}.homework-confirm-page .homework-mobile-original{display:none}}@media(max-width:600px){.homework-input-card{padding:16px}.homework-input-heading>button{width:100%}.homework-confirm-page .homework-actions button{flex:1 1 130px}.homework-confirm-page .homework-input-card textarea{font-size:16px}}.page-type-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.page-type-actions .button{min-height:48px;white-space:normal}.semantic-import{min-width:0;overflow-wrap:anywhere}.semantic-prose{white-space:pre-wrap;line-height:1.8}.semantic-paragraph,.semantic-activity{border:1px solid var(--border);border-radius:12px;padding:16px;margin:16px 0;min-width:0}.semantic-sentence{margin:16px 0;padding-top:12px;border-top:1px solid var(--border)}.semantic-import textarea{scroll-margin-top:20px;scroll-margin-bottom:140px;resize:vertical}.semantic-import .item-actions{display:flex;flex-wrap:wrap}.semantic-import .item-actions .button{flex:1;min-width:120px;min-height:48px}.activity-tip{background:var(--surface-subtle,#f3f7f4)}.activity-example,.activity-quote{border-left:4px solid var(--primary)}.semantic-raw{margin-top:24px}.semantic-raw pre{max-height:300px;overflow:auto}.semantic-save{min-height:52px}.semantic-preview summary{min-height:44px;padding:12px 0;cursor:pointer}.semantic-exercises .homework-input-card{min-width:0}.semantic-exercises textarea,.semantic-exercises input{max-width:100%}@media(max-width:767px){.semantic-paragraph,.semantic-activity{padding:12px}.semantic-import .item-actions .button{min-width:100px}.semantic-import .import-card{padding:20px 16px}}.textbook-course{max-width:900px;margin:auto;padding-bottom:calc(120px + env(safe-area-inset-bottom));overflow-wrap:anywhere}.course-heading{margin:24px 0 32px}.course-heading h1{font-size:clamp(1.6rem,4vw,2.3rem);line-height:1.3;margin:12px 0}.course-heading p{color:#47655d}.course-text{font-size:1.2rem;line-height:1.95;white-space:pre-wrap}.course-reading{background:#fff;padding:28px;border-radius:20px;border:1px solid #dce5e5}.course-footer{display:flex;align-items:center;flex-wrap:wrap;gap:16px;padding:24px 0;margin-top:24px;border-top:1px solid #dce5e5}.course-footer .primary{min-height:48px}.course-source{margin:24px 0}.course-source img{width:100%;height:auto;margin:16px 0}.course-sections{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.course-sections h2{font-size:1.2rem}.course-summary li{padding:10px 0}.course-summary li a{margin-left:12px}.textbook-course textarea,.textbook-course select{width:100%;box-sizing:border-box;max-width:100%}.textbook-course .study-actions{flex-wrap:wrap}.textbook-course .project-step{margin-top:24px}.textbook-course button,.textbook-course a.button{min-height:44px;white-space:normal}.textbook-course .activity-source-text{white-space:pre-wrap;line-height:1.8}.course-summary{padding:24px;background:#f1f8f4;border-radius:20px}.paragraph-player .library-actions{display:flex;gap:12px;flex-wrap:wrap}@media(max-width:850px){.course-reading{padding:24px}.course-sections{gap:12px}.course-footer{position:static}}@media(max-width:600px){.textbook-course{padding-bottom:calc(110px + env(safe-area-inset-bottom))}.course-sections{grid-template-columns:1fr}.course-reading{padding:18px}.course-text{font-size:1.1rem;line-height:1.8}.course-footer .primary{width:100%;justify-content:center}.course-summary{padding:18px}.course-footer{gap:12px}}.teaching-reader .course-reading{margin:1.2rem 0;padding:1.4rem;border-radius:18px;background:#fff;border:1px solid #dce8ed}.lesson-goals{background:#eaf5f2;border-radius:16px;padding:1.2rem}.lesson-goals li{margin:.6rem 0;line-height:1.6}.lesson-paragraph-heading{display:flex;justify-content:space-between;gap:1rem;align-items:center;flex-wrap:wrap}.inline-word{display:inline;padding:0;border:0;background:transparent;color:inherit;font:inherit;line-height:inherit;border-radius:3px;cursor:pointer;box-shadow:none;min-height:0}.inline-word:hover,.inline-word:focus-visible{background:#daf0eb;text-decoration:underline}.lesson-sentence{line-height:2.2}.sentence-help{font-size:.75rem;padding:.15rem .35rem;background:#edf3f6;border:0;color:#3c6271;border-radius:5px;min-height:0;vertical-align:middle}.lesson-help-panel{position:fixed;z-index:60;right:1rem;bottom:5rem;width:min(420px,calc(100vw - 2rem));max-height:60vh;overflow:auto;padding:1.4rem;background:#fff;border:2px solid #358b79;box-shadow:0 8px 40px #133e4933;border-radius:16px}.lesson-help-panel p{line-height:1.7}.help-close{float:right}.lesson-key-words{margin:1.5rem 0}.practice-session .practice-group-instruction{line-height:1.7;padding:1rem;background:#f0f6fa;border-radius:10px}.practice-result-page .practice-result-list{margin-top:1rem}@media(max-width:600px){.teaching-reader .course-reading{padding:1rem}.teaching-reader .course-text{font-size:1.12rem}.lesson-help-panel{bottom:4.5rem}}.textbook-course:has(.teaching-reader) .course-heading{margin:12px 0 18px}.lesson-goals{padding:.85rem 1rem}.lesson-goals h2{font-size:1.1rem;margin:0 0 .4rem}.lesson-goals ul{margin:0;padding-left:1.2rem}.lesson-goals li{margin:.25rem 0;line-height:1.45}.learning-chinese{font-size:.94rem;color:#52646e;line-height:1.7;margin:.3rem 0 .9rem}.language-mode{display:inline-flex;gap:.7rem;align-items:center;flex-wrap:wrap;margin:.6rem 0}.language-mode select{min-height:44px;padding:.5rem;border:1px solid #9bb6bf;border-radius:8px}.lesson-sentence{overflow-wrap:anywhere}/*! tailwindcss v4.3.3 | MIT License | https://tailwindcss.com */@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-ordinal:initial;--tw-slashed-zero:initial;--tw-numeric-figure:initial;--tw-numeric-spacing:initial;--tw-numeric-fraction:initial;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial}}}@layer theme{:root,:host{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;-moz-tab-size:4;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab,red,red)){::placeholder{color:color-mix(in oklab,currentcolor 50%,transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){-webkit-appearance:button;-moz-appearance:button;appearance:button}::file-selector-button{-webkit-appearance:button;-moz-appearance:button;appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.collapse{visibility:collapse}.invisible{visibility:hidden}.visible{visibility:visible}.absolute{position:absolute}.fixed{position:fixed}.relative{position:relative}.static{position:static}.sticky{position:sticky}.isolate{isolation:isolate}.container{width:100%}@media(min-width:40rem){.container{max-width:40rem}}@media(min-width:48rem){.container{max-width:48rem}}@media(min-width:64rem){.container{max-width:64rem}}@media(min-width:80rem){.container{max-width:80rem}}@media(min-width:96rem){.container{max-width:96rem}}.block{display:block}.contents{display:contents}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline{display:inline}.table{display:table}.shrink{flex-shrink:1}.grow{flex-grow:1}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.resize{resize:both}.truncate{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.rounded{border-radius:.25rem}.border{border-style:var(--tw-border-style);border-width:1px}.capitalize{text-transform:capitalize}.lowercase{text-transform:lowercase}.uppercase{text-transform:uppercase}.italic{font-style:italic}.ordinal{--tw-ordinal:ordinal;font-variant-numeric:var(--tw-ordinal,) var(--tw-slashed-zero,) var(--tw-numeric-figure,) var(--tw-numeric-spacing,) var(--tw-numeric-fraction,)}.underline{text-decoration-line:underline}.shadow{--tw-shadow:0 1px 3px 0 var(--tw-shadow-color,#0000001a), 0 1px 2px -1px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow),var(--tw-inset-ring-shadow),var(--tw-ring-offset-shadow),var(--tw-ring-shadow),var(--tw-shadow)}.ring{--tw-ring-shadow:var(--tw-ring-inset,) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow),var(--tw-inset-ring-shadow),var(--tw-ring-offset-shadow),var(--tw-ring-shadow),var(--tw-shadow)}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.blur{--tw-blur:blur(8px);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.grayscale{--tw-grayscale:grayscale(100%);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.invert{--tw-invert:invert(100%);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.sepia{--tw-sepia:sepia(100%);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}}.page .button{min-height:48px;font:inherit;cursor:pointer;text-align:center;white-space:normal;overflow-wrap:anywhere;border:1px solid #b0bfb7;font-weight:600;transition:background-color .12s}.page .button.primary{color:#fff;background:#246553;border-color:#246553}.page .button.secondary{color:#202c2a;background:#fff}.page button:not(.button):not(.inline-word):not(.sentence-help){color:#202c2a;min-height:44px;font:inherit;cursor:pointer;background:#fff;border:1px solid #b0bfb7;border-radius:10px;padding:8px 14px}.page button:hover:not(:disabled),.page .button:hover{filter:brightness(.96)}.page button:disabled,.page .button:disabled{opacity:.6;cursor:not-allowed;filter:none}.page :is(button,a,input,textarea,select,summary):focus-visible{outline-offset:3px;outline:3px solid #246553}.page :is(select,textarea,input:not([type=checkbox]):not([type=radio])){box-sizing:border-box;color:#202c2a;min-width:0;max-width:100%;min-height:44px;font:inherit;background:#fff;border:1px solid #7c9187;border-radius:10px;padding:10px 12px}.page :is(input,select,textarea):disabled{cursor:not-allowed;background:#e9efec}.page input:is([type=radio],[type=checkbox]){accent-color:#246553;flex-shrink:0}.homework-detail-panel>label{margin:14px 0;display:block}.homework-detail-panel>label>textarea{width:100%;min-height:100px;margin:8px 0;display:block}.homework-detail-panel>.button{margin-top:12px}.homework-detail-panel>fieldset label.practice-option{cursor:pointer;border:1px solid #b0bfb7;border-radius:10px;align-items:center;gap:12px;min-height:48px;margin:8px 0;padding:10px;display:flex}.homework-detail-panel>fieldset label:has(input:checked){background:#e8f4ec;border-color:#246553}.page summary{cursor:pointer;overflow-wrap:anywhere;background:#f6f8f6;border:1px solid #d5dfd8;border-radius:10px;min-height:44px;padding:10px 12px}.page details[open]>summary{margin-bottom:12px}.page [role=alert]:not(:empty),.practice-input-error{color:#a72f36;background:#fff4f3;border-left:3px solid #a72f36;border-radius:6px;padding:10px 12px}.review-today{background:#edf7f0;border:1px solid #93b5a2;border-radius:14px;margin-bottom:24px;padding:20px}.review-today .button{max-width:320px;margin-top:12px}.mistake-categories{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:16px 0;display:grid}.mistake-categories [aria-pressed=true]{background:#e8f4ec!important;border:2px solid #246553!important}.special-review,.mistake-history{margin:20px 0}.mistake-history .library-content{overflow-wrap:anywhere;border-bottom:1px solid #d5dfd8;padding:16px 0}.mistake-history .button{max-width:320px;margin-top:10px}.language-help-menu{width:fit-content;max-width:100%;margin:0 0 14px auto}.language-help-menu>summary{background:#fff;font-size:.875rem}.language-help-menu select{width:100%;display:block}.practice-answer label.practice-option{align-items:center;min-height:48px;margin:6px 0;padding:10px 12px}.practice-option-row{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px;margin:8px 0;display:grid}.practice-option-row>.learning-chinese{color:#52665d;margin:0;font-size:.875rem}.practice-option-row>.learning-chinese[open]{grid-column:1/-1;margin-left:32px}.practice-option-row>.learning-chinese>summary{background:#f8faf8;min-height:44px;padding:4px 10px}.practice-option-row label span{overflow-wrap:anywhere;min-width:0}.learning-settings{max-width:960px}.learning-settings>.import-card{margin:20px 0}.learning-settings label{margin:12px 0;display:block}.learning-settings select,.learning-settings input:not([type=checkbox]){width:100%;margin-top:6px;display:block}.learning-settings .button{margin-top:12px}.learning-settings .learning-clear{background:#fff8f6;border:1px solid #b44747}.page .button.danger{color:#fff;background:#a72f36;border-color:#a72f36}.consent-status{margin:12px 0;font-weight:600}.ai-consent>details{margin-top:12px}@media(max-width:850px){.mistake-categories{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.learning-settings :is(input,textarea,select){font-size:16px}.review-today{padding:16px}.language-help-menu{width:auto}.language-help-menu>summary{width:fit-content;margin-left:auto}.mistake-filters,.quick-grid{grid-template-columns:minmax(0,1fr)}}:root{--background:#f6f7f9;--surface:#fff;--surface-secondary:#eef2f1;--text-primary:#202c2a;--text-secondary:#64716f;--border:#e2e7e5;--primary:#246553;--success:#37775f;--warning:#9b731e;--danger:#b44747;--radius:20px;--spacing:8px;--shadow:0 4px 24px #223b2f05;--font-body:16px;--font-heading:clamp(1.65rem,3vw,2.2rem);color:var(--text-primary);background:var(--background);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;font-size:var(--font-body);font-synthesis:none;line-height:1.6}*{box-sizing:border-box}body{margin:0}html,body,#root{width:100%;min-width:0}img{max-width:100%}a{color:inherit;text-decoration:none}a:focus-visible,button:focus-visible{outline:3px solid var(--primary);outline-offset:4px}h1,h2,h3,p{margin:0}h1{font-size:var(--font-heading);letter-spacing:-.025em;font-weight:650;line-height:1.35}h2{font-size:1.3rem;font-weight:650}h3{font-size:1rem;font-weight:600}svg{flex-shrink:0}.skip-link{z-index:30;background:#fff;padding:12px;position:fixed;top:-100px;left:16px}.skip-link:focus{top:12px}.mobile-header{padding:calc(16px + env(safe-area-inset-top)) 16px 16px;background:var(--surface);border-bottom:1px solid var(--border);align-items:center;gap:10px;font-weight:650;display:flex}.mobile-header svg{color:var(--primary)}.sidebar{display:none}main{min-width:0}.page{width:100%;max-width:1200px;padding:28px 16px calc(104px + env(safe-area-inset-bottom));margin:auto}.page-heading{margin-bottom:26px}.eyebrow{color:var(--primary);margin-bottom:10px;font-size:.875rem;font-weight:600}.page-heading>p:last-child{color:var(--text-secondary);margin-top:12px}.core-grid,.task-grid,.quick-grid{grid-template-columns:minmax(0,1fr);gap:16px;display:grid}.core-card{border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.english-card{background:#edf4ef}.homework-card{background:#f2f0e9}.card-top{justify-content:space-between;align-items:center;gap:12px;margin-bottom:24px;display:flex}.feature-icon{width:56px;height:56px;color:var(--primary);background:#ffffffb3;border-radius:16px;justify-content:center;align-items:center;display:inline-flex}.homework-card .feature-icon{color:#807044}.card-tag{color:var(--text-secondary);font-size:.875rem}.core-card h2{font-size:1.6rem}.core-card>p{color:var(--text-secondary);margin:8px 0 24px}.button{border-radius:12px;justify-content:center;align-items:center;gap:12px;min-height:52px;padding:12px 20px;font-weight:600;display:flex}.primary{background:var(--primary);color:#fff}.secondary{color:var(--text-primary);background:#fff;border:1px solid #dadace}.button:hover{filter:brightness(.96)}.home-section{margin-top:32px}.section-heading{justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}.mock-label{color:var(--text-secondary);font-size:.875rem}.task-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:20px}.task-count{margin:14px 0 12px}.task-count strong{font-size:1.75rem;font-weight:650}.task-count span{color:var(--text-secondary)}progress{width:100%;height:6px;accent-color:var(--primary);background:#e9eeeb;border:0;border-radius:10px;display:block;overflow:hidden}progress::-webkit-progress-bar{background:#e9eeeb}progress::-webkit-progress-value{background:var(--primary);border-radius:10px}progress::-moz-progress-bar{background:var(--primary)}.task-note{color:var(--text-secondary);margin-top:12px;font-size:.875rem}.quick-item{background:var(--surface);border:1px solid var(--border);border-radius:14px;align-items:center;gap:12px;min-width:0;min-height:68px;padding:16px;display:flex}.quick-item>svg:first-child{color:var(--primary)}.quick-item>svg:last-child,.quick-item small{color:var(--text-secondary);margin-left:auto}.quick-item small{font-size:.875rem}.home-footer{color:var(--text-secondary);text-align:center;margin-top:32px;font-size:.875rem}.bottom-nav{background:var(--surface);border-top:1px solid var(--border);padding:8px 8px calc(8px + env(safe-area-inset-bottom));z-index:10;position:fixed;bottom:0;left:0;right:0}.bottom-nav nav{grid-template-columns:repeat(5,minmax(0,1fr));gap:4px;display:grid}.nav-item{min-height:52px;color:var(--text-secondary);border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:4px;font-size:.875rem;display:flex}.nav-item.active{color:var(--primary);background:#eaf2ed;font-weight:650}.nav-item.active span{text-underline-offset:4px;text-decoration:underline}.placeholder{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);max-width:600px;margin:24px auto;padding:32px 24px}.placeholder .eyebrow{margin-top:24px}.placeholder>p:not(.eyebrow){color:var(--text-secondary);margin:16px 0 28px}@media(min-width:768px){.app-shell{grid-template-columns:100px minmax(0,1fr);min-height:100dvh;display:grid}.mobile-header,.bottom-nav{display:none}.sidebar{border-right:1px solid var(--border);background:var(--surface);flex-direction:column;height:100dvh;padding:28px 12px;display:flex;position:sticky;top:0}.brand{justify-content:center;margin-bottom:36px;display:flex}.brand-icon{background:var(--primary);color:#fff;border-radius:14px;justify-content:center;align-items:center;width:44px;height:44px;display:flex}.brand>div,.sidebar-note{display:none}.sidebar nav{flex-direction:column;gap:12px;display:flex}.nav-item{min-height:64px}.page{padding:40px 24px}.core-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.core-card{padding:24px 20px}.card-top{flex-wrap:wrap;min-height:88px;margin-bottom:16px}.task-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.home-section{margin-top:36px}}@media(min-width:1024px){.app-shell{grid-template-columns:220px minmax(0,1fr)}.sidebar{padding:32px 20px}.brand{justify-content:flex-start;align-items:center;gap:10px}.brand>div{font-size:1rem;font-weight:650;display:block}.brand small{color:var(--text-secondary);margin-top:3px;font-size:.75rem;font-weight:400;display:block}.sidebar .nav-item{flex-direction:row;justify-content:flex-start;gap:14px;min-height:52px;padding:12px 18px;font-size:1rem}.sidebar-note{color:var(--text-secondary);margin-top:auto;padding:20px 10px;font-size:.875rem;display:block}.page{padding:48px 36px}.core-card{padding:28px}.card-top{flex-wrap:nowrap;min-height:56px;margin-bottom:28px}.quick-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.quick-item{gap:10px}.quick-item small{font-size:.8rem}}@media(min-width:1366px){.page{padding:56px 48px}.core-card{padding:32px}.core-card .button{max-width:240px}.page-heading{margin-bottom:32px}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}.account-page{max-width:760px;margin-inline:auto}.account-form{display:grid;gap:18px;margin-block:24px;max-width:440px}.account-form label,.daily-form label{display:grid;gap:8px;min-width:0}.account-form input,.daily-form input,.daily-form select{box-sizing:border-box;width:100%;min-width:0;padding:12px;border:1px solid #cdd6e3;border-radius:10px;background:#fff;color:#17223c;font:inherit}.account-notice{margin:12px auto;padding:16px;border:1px solid #c5d5ee;background:#edf4ff;border-radius:12px;max-width:1080px;overflow-wrap:anywhere}.account-notice button{margin:4px;white-space:normal}.account-notice p{margin:8px 0}.account-page [role=alert],.daily-page [role=alert]{color:#a62929}.daily-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.daily-form button{align-self:end}.daily-task{padding:18px;border:1px solid #dce3ed;border-radius:16px;margin:16px 0;background:#fff}.daily-actions{display:flex;flex-wrap:wrap;gap:8px}.daily-actions button{padding:8px 12px;border:1px solid #bac9dd;border-radius:8px;background:#f5f8fe;cursor:pointer;font:inherit}.daily-task progress{width:100%}.daily-task h2{font-size:20px;margin:0 0 8px}.daily-counts{display:flex;flex-wrap:wrap;gap:16px}.daily-history{font-size:14px;overflow-wrap:anywhere}@media(max-width:600px){.daily-form{grid-template-columns:1fr}.account-notice{margin:10px;padding:12px}.daily-task{padding:14px}.daily-page .button{white-space:normal}}.homework-page{max-width:1200px}.homework-page button{cursor:pointer}.homework-page button:disabled{cursor:default;opacity:.5}.homework-back{display:inline-flex;align-items:center;gap:8px;min-height:44px;margin-bottom:16px;color:var(--primary)}.homework-preview-notice{font-size:.875rem;color:var(--text-secondary);margin:0 0 24px;padding:12px 16px;background:#edf3ef;border-radius:12px}.homework-section-heading{margin-bottom:16px}.homework-subject-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:14px}.homework-subject-card{display:flex;text-align:left;align-items:flex-start;gap:18px;padding:24px;background:#fff;border:1px solid var(--border);border-radius:20px;min-width:0}.homework-subject-card>svg{color:var(--primary);margin-top:4px}.homework-subject-card strong{display:block;font-size:1.25rem;margin-bottom:6px}.homework-subject-card small{display:block;color:var(--text-secondary);font-size:.875rem}.homework-subject-card .homework-availability{margin-top:12px;color:var(--primary)}.homework-card-panel{padding:24px;background:#fff;border:1px solid var(--border);border-radius:20px;margin-bottom:20px;min-width:0}.homework-subject-grid+.homework-card-panel{margin-top:24px}.homework-card-panel h2{margin-bottom:16px}.homework-card-panel>p{margin:12px 0}.homework-card-panel .button{margin-top:12px}.image-picker-actions,.homework-actions{display:flex;gap:12px;flex-wrap:wrap;margin:16px 0}.image-picker-actions>.button,.homework-actions>.button{flex:1;min-width:140px}.image-picker-input{display:none}.homework-image{display:block;max-height:560px;object-fit:contain;width:100%;background:#f5f6f5;border-radius:12px}.homework-image-empty{min-height:180px;display:flex;gap:16px;flex-direction:column;align-items:center;justify-content:center;background:#f4f6f5;border:1px dashed var(--border);padding:24px;border-radius:12px;text-align:center;color:var(--text-secondary)}.homework-file-name{overflow-wrap:anywhere}.homework-primary-action{width:100%;max-width:640px;margin:24px auto}.homework-note{color:var(--text-secondary);font-size:.875rem;overflow-wrap:anywhere}.homework-error{background:#fff0ee;padding:16px;border-radius:12px;color:var(--danger);margin:16px 0}.homework-confirmation{padding:16px;background:#fbf6e9;border-radius:12px;margin:16px 0}.homework-processing{max-width:620px;margin:auto;padding:32px 24px;border:1px solid var(--border);border-radius:20px;background:#fff}.homework-processing-symbol{display:flex;align-items:center;justify-content:center;width:72px;height:72px;background:#eaf3ee;border-radius:20px;margin:0 auto 24px;color:var(--primary)}.homework-processing h2{text-align:center}.homework-processing-steps{list-style:none;padding:0;margin:28px 0;display:grid;gap:20px}.homework-processing-steps li{display:flex;gap:14px;align-items:center;color:var(--text-secondary)}.homework-processing-steps li>span{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:#eef1ef}.homework-processing-steps li.current{font-weight:650;color:var(--primary)}.homework-processing-steps li.current>span,.homework-processing-steps li.done>span{background:#e6f0ea;color:var(--primary)}.homework-processing>.button{margin-top:24px}.homework-result-heading{display:flex;gap:20px;justify-content:space-between;align-items:center;margin-bottom:20px}.homework-result-heading p{color:var(--text-secondary);margin-top:8px}.homework-summary{border:1px solid var(--border);padding:24px;border-radius:20px;background:#fff;margin-bottom:20px}.homework-summary-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:24px}.homework-summary-title p{color:var(--text-secondary);margin-top:4px}.homework-accuracy{display:flex;flex-direction:column;text-align:right}.homework-accuracy strong{font-size:2rem;color:var(--primary)}.homework-accuracy span{color:var(--text-secondary);font-size:.875rem}.homework-counts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:16px}.homework-counts>div{background:#f7f9f8;border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:6px}.homework-counts strong{font-size:1.5rem}.homework-status{display:inline-flex;gap:6px;align-items:center;font-size:.875rem;font-weight:600}.homework-status.correct{color:var(--success)}.homework-status.incorrect{color:var(--danger)}.homework-status.uncertain{color:var(--warning)}.homework-status.unanswered{color:var(--text-secondary)}.homework-mobile-original{background:#fff;border:1px solid var(--border);border-radius:16px;margin-bottom:20px}.homework-mobile-original summary{padding:14px 20px;min-height:52px;cursor:pointer;color:var(--primary);font-weight:600}.homework-mobile-original img,.homework-mobile-original .homework-image-empty{margin:0 16px 16px;width:calc(100% - 32px)}.homework-desktop-original{display:none}.homework-result-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:24px}.homework-results{min-width:0}.homework-toolbar{display:flex;gap:10px;margin-bottom:16px}.homework-toolbar>.button{flex:1;min-width:0}.homework-toolbar button[aria-pressed=true],.homework-filter button[aria-pressed=true]{background:#e8f1eb;border-color:var(--primary);color:var(--primary)}.homework-filter{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.homework-filter button{padding:10px 16px;min-height:44px;border:1px solid var(--border);border-radius:12px;background:#fff;font-size:.875rem}.homework-question-list{display:grid;gap:14px;margin-top:16px}.homework-question-card{display:block;padding:20px;border:1px solid var(--border);border-radius:16px;background:#fff;overflow-wrap:anywhere;min-width:0}.homework-question-card:hover{border-color:#aec9bd}.homework-question-top{display:flex;gap:12px;justify-content:space-between;align-items:center;margin-bottom:12px}.homework-question-text{white-space:pre-wrap;font-size:1.0625rem;margin-bottom:16px;overflow-wrap:anywhere}.homework-question-card>p{margin-top:6px}.homework-learning-preview{border-top:1px solid var(--border);padding-top:12px;margin-top:12px;font-size:.875rem}.homework-learning-preview p+p{margin-top:8px}.homework-detail-link{display:block;margin-top:14px;font-size:.875rem;color:var(--primary)}.homework-correct-collapsed summary{display:flex;justify-content:space-between;gap:12px;align-items:center;min-height:44px;cursor:pointer}.homework-correct-collapsed[open] summary{margin-bottom:16px}.homework-knowledge-summary{margin-top:24px;padding:16px 20px;border-radius:16px;background:#fff;border:1px solid var(--border)}.homework-knowledge-summary summary,.homework-steps summary{min-height:44px;cursor:pointer;font-weight:600}.homework-knowledge-summary p{margin-top:10px}.homework-question-page{max-width:900px}.homework-detail-panel{padding:24px;border-radius:20px;background:#fff;border:1px solid var(--border);overflow-wrap:anywhere}.homework-detail-section{margin-top:24px}.homework-detail-section h2{font-size:1.0625rem;margin-bottom:12px}.homework-answer-pair{display:grid;grid-template-columns:minmax(0,1fr);gap:12px;margin:20px 0}.homework-answer-pair section{padding:18px;border-radius:12px;background:#f5f6f5}.homework-answer-pair h3{font-size:.875rem;color:var(--text-secondary);margin-bottom:8px}.homework-answer-pair .homework-reference-answer{background:#edf5ef}.homework-steps{margin:24px 0}.homework-steps ol{padding-left:26px;margin:12px 0;display:grid;gap:12px}.homework-positive{color:var(--success);font-weight:600}.homework-placeholder-message{padding:16px;background:#eaf3ee;border-radius:12px;margin:20px 0}.homework-detail-panel .homework-confirmation p{margin-top:10px}@media(max-width:600px){.homework-result-heading{align-items:flex-start;flex-direction:column}.homework-result-heading>.button{width:100%}.image-picker-actions{flex-direction:column}.image-picker-actions>.button{min-width:0;width:100%}.homework-card-panel,.homework-summary,.homework-detail-panel{padding:20px}.homework-counts>div{padding:12px}.homework-question-card{padding:18px}.homework-question-top{align-items:flex-start}.homework-status{white-space:nowrap}}@media(min-width:768px){.homework-subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.homework-counts{grid-template-columns:repeat(4,minmax(0,1fr))}.homework-answer-pair{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(min-width:1024px){.homework-result-layout{grid-template-columns:minmax(240px,.8fr) minmax(0,1.2fr);align-items:start}.homework-desktop-original{display:block;position:sticky;top:24px;background:#fff;border:1px solid var(--border);border-radius:20px;padding:20px;min-width:0}.homework-desktop-original h2{font-size:1.0625rem;margin-bottom:16px}.homework-desktop-original .homework-note{margin-top:12px}.homework-desktop-original .homework-image{max-height:calc(100dvh - 220px)}.homework-mobile-original{display:none}.homework-subject-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}