:root{--bg:#f6f5f1;--paper:#fff;--ink:#243b35;--muted:#7b8278;--line:#e3e5dd;--accent:#e5ad78;--green:#365c4d;--light:#edf1ea;--radius:18px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,a,select,input{ -webkit-tap-highlight-color:transparent}button{cursor:pointer;border:0;background:none;color:inherit;touch-action:manipulation}button:disabled{opacity:.38;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid #cf975f;outline-offset:3px}button:hover:not(:disabled){filter:brightness(.96)}[hidden]{display:none!important}.topbar{height:88px;display:flex;align-items:center;justify-content:space-between;padding:0 42px;border-bottom:1px solid var(--line);background:#f9f8f4}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-weight:650;font-size:19px;letter-spacing:1px}.brand-mark{background:var(--ink);color:#f6e7cf;width:43px;height:43px;display:grid;place-items:center;border-radius:13px;font-size:30px;font-weight:400}.brand small{display:block;font-size:9px;font-weight:500;letter-spacing:3.5px;color:#888d7d;margin-top:5px}.top-right{display:flex;align-items:center;gap:22px}.local-note{color:var(--muted);font-size:12px}.local-note i{display:inline-block;width:6px;height:6px;background:#6f8b67;border-radius:50%;margin-right:7px}.icon-btn{width:32px;height:32px;border:1px solid #cfd5ca;border-radius:50%;font-size:17px}.app-shell{display:grid;grid-template-columns:296px minmax(0,1fr);max-width:1480px;margin:auto}aside{padding:30px 24px;border-right:1px solid var(--line);height:calc(100dvh - 88px);position:sticky;top:0;display:flex;flex-direction:column}.sidebar-heading{display:flex;justify-content:space-between;align-items:center}h2{font-size:15px;margin:0;font-weight:600}.sidebar-heading h2{font-size:16px}.summary{margin:24px 0 25px}.summary strong{font-family:Georgia,serif;font-size:32px;font-weight:400}.summary span{color:var(--muted);font-size:12px}.progress-track{height:5px;border-radius:8px;background:#e0e4d9;margin-top:13px;overflow:hidden}.progress-track>div{height:100%;background:var(--green);transition:width .3s;width:0}.summary-meta{display:flex;justify-content:space-between;margin-top:10px;align-items:center}.summary-meta span,.summary-meta button{font-size:10px}.text-btn{color:#62745d;font-size:12px;padding:5px 0}.searchbox{display:flex;align-items:center;border:1px solid var(--line);background:#fff;border-radius:10px;padding:0 10px;height:43px;gap:8px;flex-shrink:0}.searchbox span{font-size:24px;color:#9caa97}.searchbox input{min-width:0;width:100%;border:0;outline:0;font-size:12px;background:transparent;color:var(--ink)}.field-caption{font-size:10px;color:var(--muted);margin:19px 0 8px}select{color:var(--ink);border:1px solid var(--line);border-radius:8px;background:#fff;padding:10px 7px;max-width:100%;font-size:12px}#chapterFilter{width:100%;flex-shrink:0}.filter-tabs{display:flex;gap:2px;background:#eaece4;border-radius:9px;padding:3px;margin:16px 0 22px;flex-shrink:0}.filter-tabs button{flex:1;padding:8px 0;font-size:10px;white-space:nowrap;border-radius:6px;color:#7d8579}.filter-tabs .selected{background:#fff;color:var(--ink);box-shadow:0 1px 4px #283a2520}.list-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:9px;color:var(--muted);font-size:11px}.question-list{overflow-y:auto;flex:1;min-height:100px;padding-right:3px;scrollbar-width:thin}.list-item{width:100%;display:flex;text-align:left;align-items:flex-start;gap:10px;padding:12px 9px;border-radius:10px;margin:3px 0;color:#70796b}.list-item.active{background:#e4ebdf;color:var(--ink)}.list-id{font-size:10px;padding-top:3px;opacity:.7;font-variant-numeric:tabular-nums}.list-copy{font-size:12px;line-height:1.65;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.list-dot{font-size:11px;color:#8fa785;padding-top:3px}.list-empty{font-size:12px;color:var(--muted);line-height:2;padding:15px}.sidebar-foot{font-size:10px;line-height:1.8;color:#a0a697;padding-top:14px;margin:0}main{max-width:1000px;width:100%;padding:42px 58px 125px;margin:auto;min-width:0}.intro{display:flex;align-items:center;justify-content:space-between;margin-bottom:34px}.eyebrow{font-size:10px;letter-spacing:2px;color:#809174;margin:0 0 12px}h1{font-family:Georgia,"Songti SC","SimSun",serif;font-size:38px;font-weight:500;letter-spacing:2px;margin:0 0 11px}.intro-sub{font-size:13px;color:var(--muted);margin:0}.orbit{width:100px;height:100px;opacity:.5;transform:rotate(-4deg);margin-right:6px}.orbit svg{width:100%;height:100%;fill:none;stroke:#8d9c7d;stroke-width:1}.orbit path{fill:#e7e9de;stroke-width:1.2}.lesson-path{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:#838e7c;margin:0 0 15px;gap:10px}#position{white-space:nowrap;font-variant-numeric:tabular-nums}.question-card{background:var(--paper);border:1px solid #e3e5dc;border-radius:var(--radius);padding:22px 28px 18px;box-shadow:0 8px 30px #26342504}.card-top{display:flex;align-items:center;justify-content:space-between}.question-kicker{color:#90a086;font-size:10px;letter-spacing:1.4px}.star-btn{font-size:27px;color:#a3ac98;padding:0 0 0 12px;line-height:1}.star-btn[aria-pressed=true]{color:#bd864a}.question-body{padding:13px 0 21px;font-family:Georgia,"Songti SC","SimSun",serif;font-size:23px;line-height:1.85;letter-spacing:.4px}.question-body p{margin:0 0 8px}.question-body p:not(:first-child){font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;font-size:16px;letter-spacing:0}.question-source{display:flex;align-items:center;justify-content:space-between;padding-top:14px;border-top:1px solid #eef0e9;color:#9a9f92;font-size:10px}.status-pill{padding:4px 9px;border-radius:20px;background:#f3f4ee;color:#8b937f}.status-pill.mastered{background:#e5efdf;color:#55734a}.status-pill.review{background:#fbefdf;color:#b18653}.audio-panel{margin:22px 0 27px;padding:21px 24px;background:#ecefe6;border:1px solid #e1e6d8;border-radius:var(--radius)}.audio-title{display:flex;gap:13px;align-items:center}.audio-title h2{font-size:14px;margin-bottom:6px}.audio-title p{margin:0;color:#919a85;font-size:11px;line-height:1.6}.sound-icon{display:flex;align-items:center;gap:3px;height:36px;padding:8px;background:#e0e7d7;border-radius:10px}.sound-icon span{width:3px;height:8px;background:#7c916a;border-radius:3px}.sound-icon span:nth-child(2){height:20px}.sound-icon span:nth-child(3){height:14px}.speaking .sound-icon span{animation:sound .8s ease-in-out infinite alternate}.speaking .sound-icon span:nth-child(2){animation-delay:.2s}.speaking .sound-icon span:nth-child(3){animation-delay:.4s}@keyframes sound{to{transform:scaleY(.45)}}.play-buttons{display:flex;gap:9px;flex-wrap:wrap;margin:18px 0}.primary,.outline,.quiet{border-radius:9px;padding:12px 17px;font-size:12px;min-height:42px;white-space:nowrap}.primary{color:#fff;background:var(--green);border:1px solid var(--green)}.outline{background:#fff;border:1px solid #dce1d5}.quiet{padding:10px 8px;font-size:11px;color:#6d7c62}.audio-settings{display:flex;align-items:center;gap:16px;padding-top:14px;border-top:1px solid #dde3d4;font-size:11px;color:#7d8972;flex-wrap:wrap}.audio-settings label{display:flex;align-items:center;gap:7px}.audio-settings select{font-size:11px;padding:6px 5px;background:#f8f9f5;border-color:#dde2d5}.voice-setting{max-width:215px}.voice-setting select{max-width:156px}.repeat-setting{margin-left:auto;cursor:pointer;white-space:nowrap}.repeat-setting input{accent-color:var(--green);height:15px;width:15px}.audio-note{font-size:10px;color:#929c88;line-height:1.8;margin:13px 0 0}.answer-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px}.answer-heading h2{font-size:14px}.reveal-btn{font-size:11px;color:#7e8c72;padding:9px 0 9px 15px}.reveal-btn span{padding-left:6px}.answer-cover{border:1px dashed #d5dccd;min-height:150px;border-radius:15px;display:flex;align-items:center;justify-content:center;flex-direction:column;padding:20px;background:#f7f8f3}.cover-icon{color:#9baa8c;font-size:25px;margin-bottom:5px}.answer-cover p{margin:4px 0 9px;font-size:13px;color:#839277}.answer-cover>span:last-child{font-size:11px;color:#a1a995;text-align:center;line-height:1.7}.answer-body{padding:22px 26px;background:#fff;border:1px solid var(--line);border-radius:15px;font-size:16px;line-height:2.05;overflow-wrap:anywhere}.answer-body p{margin:0 0 13px}.answer-body p:last-child{margin:0}.answer-body .no-answer{font-size:14px;color:var(--muted)}.source-figure{margin:18px 0}.source-figure img{max-width:100%;max-height:600px;object-fit:contain;display:block;margin:auto;border-radius:6px}.source-figure figcaption{font-size:10px;color:var(--muted);text-align:center;margin-top:7px;font-family:-apple-system,sans-serif;letter-spacing:0}.read-active{background:#fff0d7!important;border-radius:5px;box-shadow:0 0 0 4px #fff0d7}.mastery-panel{margin:28px 0 22px;padding:23px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.mastery-panel h2{font-size:13px}.mastery-panel p{font-size:11px;color:#9aa18f;margin:7px 0 15px}.mark-buttons{display:flex;gap:10px}.mark-buttons button{background:#efeee8;border:1px solid #e4e6dc;padding:11px 15px;font-size:12px;border-radius:9px;flex:1;white-space:nowrap}.mark-buttons button.active{background:#e5ebdd;border-color:#b3c3a3;color:#486438}.mark-buttons button[data-mark=review].active{background:#faeddb;border-color:#dfbf97;color:#a27946}.source-note{font-size:10px;line-height:1.9;color:#a3a99a;max-width:600px}.bottom-nav{position:sticky;bottom:0;display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:30px;padding:16px 0;background:var(--bg);border-top:1px solid var(--line);z-index:2}.bottom-nav>.primary,.bottom-nav>.outline{min-width:140px}.bottom-nav>.text-btn{padding:10px;min-height:42px}dialog{max-width:520px;width:calc(100% - 32px);border:1px solid var(--line);border-radius:20px;background:#fafbf7;color:var(--ink);padding:35px;box-shadow:0 25px 100px #1f322e30}dialog::backdrop{background:#20332865;backdrop-filter:blur(3px)}dialog h2{font-size:22px;margin-bottom:22px}dialog p,dialog li{font-size:13px;line-height:1.9;color:#7b8473}dialog ol{padding-left:20px}.dialog-close{position:absolute;right:14px;top:12px;font-size:25px;padding:0 5px}.toast{position:fixed;bottom:100px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;font-size:12px;border-radius:10px;padding:13px 20px;z-index:20;max-width:90vw;line-height:1.6}.empty{padding:50px 10px;text-align:center}.empty p{font-size:13px;color:var(--muted);margin:16px 0 23px}.mobile-only{display:none}@media(min-width:1400px){main{padding-left:85px;padding-right:85px}}@media(max-width:1050px){main{padding-left:32px;padding-right:32px}.app-shell{grid-template-columns:270px minmax(0,1fr)}aside{padding-left:20px;padding-right:20px}.audio-panel{padding:20px}.play-buttons{gap:6px}.play-buttons .primary,.play-buttons .outline{padding:11px 13px}.repeat-setting{margin-left:0}.local-note{display:none}}@media(max-width:800px){.mobile-only{display:inline-flex;align-items:center;justify-content:center}.topbar{height:73px;padding:0 19px}.brand{font-size:16px;gap:9px}.brand-mark{height:35px;width:35px;border-radius:10px;font-size:26px}.brand small{font-size:8px;margin-top:4px;letter-spacing:2.3px}.top-right{gap:12px}#openCatalog{font-size:11px;min-height:35px;padding:8px 10px;background:transparent}.icon-btn{height:28px;width:28px;font-size:14px}.app-shell{display:block}aside{display:none;position:fixed;left:0;top:0;height:100dvh;z-index:15;width:min(340px,88vw);background:var(--bg);padding:28px 24px;padding-bottom:calc(20px + env(safe-area-inset-bottom))}body.catalog-open aside{display:flex}#scrim{position:fixed;inset:0;background:#243b3575;z-index:14;backdrop-filter:blur(2px)}body.catalog-open{overflow:hidden}main{padding:29px 19px 28px;max-width:650px}.intro{margin-bottom:25px}.eyebrow{font-size:9px;letter-spacing:1.5px;margin-bottom:11px}h1{font-size:30px;letter-spacing:1px}.intro-sub{font-size:11px;line-height:1.8}.orbit{width:67px;height:67px;margin-right:0}.lesson-path{font-size:10px;margin-bottom:12px;align-items:flex-start;line-height:1.7}.question-card{padding:17px 20px 15px;border-radius:16px}.question-body{font-size:21px;padding:12px 0 17px;line-height:1.85}.question-body p:not(:first-child){font-size:15px}.question-kicker{font-size:9px;letter-spacing:.9px}.question-source{font-size:9px}.audio-panel{padding:18px;margin-top:18px;margin-bottom:24px;border-radius:16px}.audio-title h2{font-size:13px}.audio-title p{font-size:10px}.play-buttons{gap:7px;margin:17px 0}.play-buttons .primary{flex:1;padding:11px 14px}.play-buttons .outline{flex:1;padding:11px 13px}.play-buttons .quiet{padding:8px 10px;min-height:34px}.audio-settings{gap:11px;font-size:10px}.voice-setting{max-width:180px}.voice-setting select{max-width:122px}.audio-settings select{font-size:10px}.repeat-setting{margin-left:0}.audio-note{font-size:9px}.answer-body{padding:18px 20px;font-size:16px;line-height:2}.answer-cover{min-height:145px}.answer-cover>span:last-child{font-size:10px}.mastery-panel{margin-top:25px;padding:20px 0}.mark-buttons{gap:7px}.mark-buttons button{font-size:11px;padding:12px 6px;min-height:43px}.bottom-nav{position:sticky;bottom:0;margin-top:23px;padding:12px 0 calc(12px + env(safe-area-inset-bottom));gap:12px}.bottom-nav>.primary,.bottom-nav>.outline{min-width:0;flex:1}.bottom-nav>.text-btn{font-size:11px}.source-note{font-size:9px}.sidebar-foot{padding-top:10px}.toast{bottom:100px}dialog{padding:29px 24px}.list-item{min-height:52px}.list-copy{font-size:13px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}} 
.scope-tabs{display:flex;gap:3px;background:#e8ece2;border-radius:9px;padding:3px;margin-bottom:10px;flex-shrink:0}.scope-tabs button{flex:1;border-radius:6px;font-size:11px;padding:9px 2px;color:#7b8772}.scope-tabs .selected{background:#fff;color:var(--ink)}.scope-tabs b{font-size:9px;margin-left:4px;background:#e5ebdd;padding:2px 5px;border-radius:4px}.plan-btn{display:flex;flex-direction:column;gap:5px;text-align:left;border:1px dashed #cbd5be;background:#eff2e9;border-radius:9px;padding:11px 12px;font-size:11px;color:#647b53;margin-bottom:15px;flex-shrink:0}.plan-btn span{font-size:9px;color:#9baa8e}.list-row{display:flex;align-items:center;gap:0}.list-row>input{margin:0 3px 0 2px;accent-color:var(--green);width:14px;height:14px;flex-shrink:0;cursor:pointer}.list-row .list-item{min-width:0;padding-left:7px}.play-modes{display:flex;gap:2px;border-radius:8px;padding:3px;background:#e0e6d7;margin-top:17px}.play-modes button{flex:1;padding:9px 4px;font-size:10px;color:#7b8c6a;border-radius:6px}.play-modes button.selected{color:var(--ink);background:#fafbf6;box-shadow:0 1px 4px #2a402915}.group-hint{font-size:10px;color:#829576}.planner-controls,.range-controls{display:flex;gap:8px;margin:12px 0}.planner-controls input,.range-controls input{min-width:0;flex:1;border:1px solid var(--line);border-radius:8px;padding:11px 10px;font-size:12px;background:#fff;color:var(--ink)}.planner-controls select{max-width:45%}.range-controls button{padding:9px 15px;font-size:11px}.plan-tools{display:flex;align-items:center;gap:13px;font-size:11px;color:var(--muted);margin:16px 0 9px}.plan-tools button{font-size:10px}.plan-tools span{margin-right:auto}#planDialog{max-width:620px;padding:30px;max-height:90dvh}.plan-list{max-height:35dvh;overflow:auto;border:1px solid var(--line);background:white;border-radius:10px;padding:5px 12px}.plan-option{display:flex;gap:11px;align-items:flex-start;padding:11px 0;border-bottom:1px solid #f0f1eb;font-size:12px;line-height:1.7;cursor:pointer}.plan-option:last-child{border:0}.plan-option input{margin-top:4px;accent-color:var(--green);width:16px;height:16px;flex-shrink:0}.plan-option span{flex:1}.plan-option b{font-size:10px;color:#8f9f7f;font-weight:500;margin-right:8px}.save-plan{width:100%;margin-top:18px}.summary{margin-bottom:18px}.filter-tabs{margin-bottom:15px}#sidebar .question-list{min-height:60px}@media(max-width:800px){.play-modes button{font-size:10px;padding:10px 2px}.audio-settings .group-hint{font-size:9px}.plan-btn{font-size:12px}.scope-tabs button{font-size:12px}.sidebar-foot{font-size:9px}.summary{margin:16px 0}.field-caption{margin-top:13px}.filter-tabs{margin:12px 0}.plan-tools{gap:10px}.plan-tools span{font-size:10px}.plan-tools button{font-size:9px}#planDialog{padding:27px 20px}.plan-list{max-height:33dvh}.planner-controls select{font-size:10px}.range-controls input{font-size:11px}.save-plan{margin-top:12px}}
@media(max-width:800px){.play-buttons{display:grid;grid-template-columns:1.25fr 1fr 1fr}.play-buttons .quiet:disabled{display:none}#pauseBtn{grid-column:1 / 2}#stopBtn{grid-column:2 / 4}.play-buttons .quiet{background:#e2e8da;border-radius:7px}}
.offline-strip{display:flex;align-items:center;gap:8px;margin:-16px 0 23px;font-size:10px;color:#7a8a6e;min-height:24px}.offline-strip p{margin:0;line-height:1.8;flex:1}.offline-dot{width:6px;height:6px;background:#bdc7b3;border-radius:50%;flex-shrink:0}.offline-strip.ready .offline-dot{background:#60825d}.offline-strip.failed{color:#a58a61}.offline-strip.failed .offline-dot{background:#bd9b69}.offline-strip button{font-size:10px;white-space:nowrap}@media(max-width:800px){.offline-strip{margin:-10px 0 20px;font-size:9px}.offline-strip button{font-size:9px}}
/* Safari: avoid form-focus zoom and reserve comfortable touch targets. */
@media(max-width:800px){.searchbox input,.planner-controls input,.range-controls input,.planner-controls select,.audio-settings select,#chapterFilter{font-size:16px}.searchbox{min-height:44px}select{min-height:44px}.icon-btn{width:44px;height:44px;flex-shrink:0}.star-btn{width:44px;min-height:44px}.top-right{gap:8px}#openCatalog{min-height:44px}.play-modes button{min-height:44px}.reveal-btn{min-height:44px}.voice-setting select{max-width:175px}.voice-setting{max-width:230px}.audio-settings{gap:10px}.range-controls button,.plan-tools button{min-height:44px}.planner-controls select{max-width:47%}.plan-tools{gap:8px}.scope-tabs button,.filter-tabs button{min-height:38px}}

/* Study and recorded audio */
.study-tools{background:#edf1ea;padding:16px 18px;border-radius:14px;margin-bottom:22px}.study-tools .play-modes{margin:0;max-width:340px}.study-tools p{font-size:13px;color:#526550;margin:11px 0 0;line-height:1.7}#recordedAudio{width:100%;height:42px;margin:14px 0 4px}.auto-next{display:flex;align-items:center;gap:7px;font-size:12px;line-height:1.6}.auto-next input{accent-color:#365c4d;min-width:20px;min-height:20px}.mastery-panel{flex-wrap:wrap}.audio-note{line-height:1.7}@media(max-width:800px){.study-tools{padding:12px}.auto-next{font-size:14px;width:100%;padding:8px 0}.mastery-panel{gap:10px}.filter-tabs button{font-size:12px}.study-tools .play-modes button{font-size:15px;min-height:44px}}
@media(max-width:800px){main{padding-top:18px}.intro{margin-bottom:18px}.intro .eyebrow,.intro .orbit{display:none}.intro h1{font-size:25px;margin-bottom:5px}.intro-sub{font-size:12px}.offline-strip{margin:0 0 15px;font-size:11px}.study-tools{margin-bottom:17px}.study-tools p{font-size:12px}.audio-panel .play-modes button{font-size:13px}.play-buttons button{font-size:14px;min-height:44px}.audio-title p{font-size:12px}.audio-note{font-size:12px}.audio-settings .group-hint{font-size:12px}.voice-setting{max-width:100%;width:100%}.voice-setting select{max-width:calc(100% - 45px);width:250px}.mark-buttons button{font-size:14px}.answer-cover>span:last-child{font-size:12px}}

/* Large pause/resume target for one-handed Safari use. */
.play-buttons #pauseBtn{min-height:64px;min-width:200px;padding:17px 24px;font-size:22px;font-weight:650;background:#365c4d;color:#fff;border:2px solid #365c4d;border-radius:12px;box-shadow:0 3px 10px #243b3518}.play-buttons #pauseBtn:disabled{opacity:.38}.play-buttons #stopBtn{min-height:52px;padding:14px 20px;font-size:16px;background:#e0e6d7;border-radius:10px}@media(max-width:800px){.play-buttons #pauseBtn{grid-column:1 / -1;width:100%;min-width:0;min-height:68px;font-size:23px;padding:18px 20px}.play-buttons #stopBtn{grid-column:1 / -1;width:100%;min-height:52px;font-size:17px}}

/* Read the question and its original answer as one continuous card. */
.reading-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 8px 30px #26342504}.reading-card .question-card{border:0;box-shadow:none;border-radius:0;background:transparent;padding-bottom:10px}.reading-card .question-body{padding-bottom:8px}.reading-card .question-source{border:0;padding-top:0}.reading-card .answer-section{margin:0;padding:0 28px 24px}.reading-card .answer-heading{border-top:1px solid var(--line);padding-top:15px;margin-bottom:12px;gap:10px}.reading-card .answer-body{padding:0;background:transparent;border:0;border-radius:0;line-height:1.95}.reading-card .answer-cover{min-height:120px}.reading-mode .answer-heading h2{font-size:13px;color:#6b7c61}.reading-mode .answer-body p{margin-bottom:14px}.audio-options{margin:20px 0;border:1px solid #dce2d5;border-radius:12px;padding:0 16px;background:#eff2e9}.audio-options summary{cursor:pointer;min-height:52px;display:list-item;padding:16px 0;font-size:13px;line-height:1.6;color:#52684b;touch-action:manipulation}.audio-options .audio-panel{margin:0 0 16px;padding:14px;border-radius:10px}.bottom-nav{display:grid;grid-template-columns:1fr auto 1fr;gap:9px 12px;padding-top:10px}.nav-listening{grid-column:1 / -1;display:grid;grid-template-columns:1fr 1.7fr;gap:10px}.nav-listening button{min-height:60px;font-size:19px;font-weight:600;border-radius:12px;padding:12px}.nav-listening #dockPause{font-size:21px}.nav-listening button:disabled{opacity:.42}.bottom-nav>.primary,.bottom-nav>.outline{min-width:0}.mastery-panel{margin-top:18px}.reading-mode .question-body{font-size:21px;line-height:1.7}
@media(max-width:800px){.reading-card{border-radius:15px}.reading-card .question-card{padding:14px 18px 9px}.reading-card .question-body{font-size:20px;padding-top:8px;padding-bottom:6px;line-height:1.75}.reading-card .question-source{font-size:10px}.reading-card .answer-section{padding:0 18px 20px}.reading-card .answer-heading{padding-top:10px;margin-bottom:9px}.reading-card .answer-heading h2{font-size:13px}.reading-card .answer-body{font-size:17px;line-height:1.9}.reading-card .answer-body p{margin-bottom:13px}.reading-card .answer-cover{min-height:112px;padding:15px}.bottom-nav{margin-top:16px;gap:8px;padding-top:9px;padding-bottom:calc(9px + env(safe-area-inset-bottom))}.nav-listening{gap:8px}.nav-listening button{min-height:64px;font-size:17px;padding:12px 6px}.nav-listening #dockPause{font-size:21px}.bottom-nav>.primary,.bottom-nav>.outline{min-height:44px;padding:10px 8px}.audio-options{padding:0 12px;margin:16px 0}.audio-options summary{font-size:13px}.audio-options .audio-panel{padding:12px}.mastery-panel{margin-top:15px;padding-top:17px}}

.mode-reading .intro{display:none}.mode-reading .offline-strip{margin-top:0;margin-bottom:14px}.mode-reading .study-tools{margin-bottom:15px}@media(max-width:800px){.mode-reading main{padding-top:14px}.mode-reading .study-tools{padding:9px 12px}.mode-reading .study-tools p{margin-top:7px}}

/* Karaoke progress uses MP3 media time and matching speech word boundaries. */
.karaoke-word{-webkit-box-decoration-break:clone;box-decoration-break:clone;border-radius:2px;padding:1px 0}.karaoke-word.karaoke-read{background:#fff0bd}.karaoke-word.karaoke-current{background:linear-gradient(90deg,#ffd060 var(--sung,0%),transparent var(--sung,0%));box-shadow:0 2px 0 #e6b647}.karaoke-block{border-left:3px solid #e6b647;padding-left:9px;margin-left:-12px!important}.follow-reading{display:flex;align-items:center;gap:8px;font-size:13px;margin:14px 0;color:#52684b;min-height:44px}.follow-reading input{width:20px;height:20px;accent-color:#365c4d;flex-shrink:0}@media(max-width:800px){.follow-reading{font-size:15px}.karaoke-block{padding-left:7px;margin-left:-10px!important}}

.audio-settings .voice-setting{display:flex;align-items:center;gap:8px}.voice-value{font-size:14px;color:#365c4d;background:#f8f9f5;border:1px solid #dce2d5;border-radius:8px;padding:9px 12px;line-height:1.5}@media(max-width:800px){.voice-value{font-size:16px}}

.audio-settings .voice-setting select{max-width:240px;min-width:155px;min-height:44px;font-size:15px;background:#f8f9f5;color:#243b35}@media(max-width:800px){.audio-settings .voice-setting select{font-size:16px;max-width:calc(100% - 45px);width:240px}}