:root{--paper:#faf6eb;--page:#f1ebdd;--ink:#244c67;--muted:#627680;--line:#ccd4ce;--red:#a34531;--green:#286b55;--serif:"Yu Mincho","Hiragino Mincho ProN","Songti SC",serif;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--page);font-size:15px;line-height:1.7}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit;color:inherit}button,select{cursor:pointer}button,a,input,select,textarea{touch-action:manipulation}button{min-height:42px;border:1px solid #a8babf;background:transparent;border-radius:6px;padding:7px 13px;transition:background .15s}button:hover:not(:disabled){background:#e3eae4}button:disabled{opacity:.42;cursor:default}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #ba6248;outline-offset:3px}[hidden]{display:none!important}h1,h2,h3,p{margin:0}select{height:43px;border:1px solid #b6c3c1;background:var(--paper);border-radius:6px;padding:6px 30px 6px 10px;width:100%}label{font-size:12px;font-weight:600;letter-spacing:.3px}label select{display:block;margin-top:5px;font-size:14px;font-weight:400}main,.masthead{max-width:1250px;margin:auto;padding-left:36px;padding-right:36px}.masthead{display:flex;align-items:center;justify-content:space-between;padding-top:22px;padding-bottom:20px;border-bottom:2px solid var(--ink)}.brand{display:flex;align-items:center;gap:14px;font:700 28px/1.3 var(--serif);letter-spacing:4px}.brand small{font:10px/1.7 sans-serif;letter-spacing:2px;display:block;margin-top:5px}.seal{display:grid;place-items:center;background:var(--red);color:var(--paper);width:43px;height:48px;border-radius:3px;transform:rotate(-4deg);letter-spacing:0}.header-right{display:flex;align-items:center;gap:20px;font-size:13px}.test-badge{background:#e6e9dc;border:1px solid #b8c5b5;padding:4px 12px;border-radius:30px;font-size:12px}.intro{display:flex;justify-content:space-between;align-items:center;padding:30px 0 26px}.eyebrow{color:var(--red);font-size:11px;font-weight:600;letter-spacing:1.7px}h1{font:600 clamp(28px,3vw,37px)/1.5 var(--serif);margin:6px 0}.intro p:last-child{color:var(--muted);font-size:14px}.intro-note{font:16px var(--serif);letter-spacing:3px;color:var(--muted)}.library-picker{display:flex;align-items:flex-end;gap:16px;border:1px solid #b3c3c2;background:#e5ebe3;padding:17px 20px;border-radius:8px;margin-bottom:24px}.library-picker>label{width:110px}.library-picker .set-picker{flex:1;max-width:430px}.library-picker>p{margin-left:auto;padding-bottom:8px;font-size:12px;color:var(--muted)}.workspace{display:grid;grid-template-columns:260px minmax(0,1fr);gap:26px;align-items:start}.question-panel{background:var(--paper);border:1px solid var(--line);border-radius:9px;padding:18px 15px;position:sticky;top:18px;max-height:calc(100vh - 36px);overflow:auto;scrollbar-width:thin}.panel-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:13px}.panel-heading h2,.panel-heading h3{font-size:16px}.panel-heading span{font-size:12px}.filter-label{display:block;margin:12px 0}.muted{font-size:12px;color:var(--muted)}#summary{margin:12px 0}.question-group h3{font-size:11px;font-weight:600;letter-spacing:.4px;color:var(--muted);padding:16px 6px 7px}.question-link{width:100%;display:flex;justify-content:space-between;align-items:center;text-align:left;border:1px solid transparent;margin:2px 0;padding:9px 10px;font-size:14px}.question-link small{font-size:11px;color:var(--muted)}.question-link[aria-current=true]{background:#dfe9e7;border-color:#b7cbc8;color:#174d55;font-weight:600}.question-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:4px 0 17px}.question-heading h2{font:600 28px/1.5 var(--serif);margin:4px 0}.question-heading .eyebrow{letter-spacing:1px}.position{padding:6px 12px;border:1px solid #bcc7bf;border-radius:30px;font-size:12px;white-space:nowrap}.paper{padding:22px 24px;border:1px solid var(--line);border-radius:9px;background:var(--paper);margin-bottom:16px}.transport{display:flex;align-items:center;gap:19px}.play{width:60px;height:60px;border-radius:50%;background:var(--ink);color:white;border:0;font-size:24px;flex:none}.play:hover:not(:disabled){background:#376d87}.timeline{flex:1;min-width:0}.timeline-heading{display:flex;justify-content:space-between;gap:8px;font-size:12px}.timeline-heading strong{font-size:14px}#seek{width:100%;margin:13px 0 0;accent-color:var(--ink);height:20px;cursor:pointer}.transport-secondary{display:flex;justify-content:space-between;gap:10px;margin:22px 0}.transport-secondary>div{display:flex;gap:7px}.transport-secondary button{font-size:12px;padding:6px 10px}.playback-settings{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:14px;border-top:1px solid var(--line);padding-top:16px}#repeat-status{margin-top:12px}.keyboard-hint{font-size:11px;color:var(--muted);margin-top:5px}#answers h3{font-size:16px;margin-bottom:14px}.answer-image{display:block;max-width:100%;max-height:620px;object-fit:contain;margin:0 auto 18px;border-radius:4px;background:white}.option-group{border:0;padding:0;margin:0 0 22px;min-width:0}.option-group:last-child{margin-bottom:0}.option-group legend{font-weight:600;font-size:14px;margin-bottom:10px}.option-row{display:flex;align-items:flex-start;gap:10px;padding:12px;border:1px solid var(--line);border-radius:6px;background:#f5f3e9;margin-bottom:8px;font-size:14px;font-weight:400;cursor:pointer;letter-spacing:0}.option-row input{margin-top:6px;accent-color:var(--ink)}.option-row:has(input:checked){border-color:#6c9da3;background:#e7eeea}.option-row.correct{border-color:#52826c;background:#e5efe5}.option-row.incorrect{border-color:#bb7b65;background:#f7e8df}.option-row b{font-weight:600;min-width:13px}.check-answer{background:var(--ink);color:white;font-size:13px}.check-answer:hover:not(:disabled){background:#376d87}.answer-feedback{margin-top:10px;font-size:14px}.answer-feedback.correct{color:var(--green)}.answer-feedback.incorrect{color:var(--red)}.answer-explanation{font-size:13px;white-space:pre-wrap;margin-top:6px;color:var(--muted)}details summary{cursor:pointer;font-weight:600}details p{white-space:pre-wrap;margin-top:12px}#transcript{white-space:pre-wrap;font-size:16px;line-height:2.1;overflow-wrap:anywhere;padding-top:4px}#transcript .supplement{margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}.review-actions{display:flex;gap:10px;margin:15px 0}.review-actions button[aria-pressed=true]{background:#e0eadd;border-color:#719080}.note-label{display:block;margin:12px 0 6px}textarea{width:100%;resize:vertical;min-height:110px;padding:12px;border:1px solid #c4cdc7;border-radius:6px;background:#fffdf7;font-size:14px}#save-status{margin-top:7px}footer{display:flex;justify-content:space-between;gap:15px;border-top:1px solid #bdc9c2;margin-top:30px;padding:20px 0 30px;font-size:11px;color:var(--muted)}#notice{padding:12px 16px;border:1px solid #b98461;background:#faeddb;border-radius:7px;margin-bottom:16px;font-size:14px}.loading{padding:35px}.skip-link{position:absolute;top:-100px;left:20px;background:var(--paper);padding:8px;z-index:30}.skip-link:focus{top:5px}.empty{padding:18px 8px;font-size:13px;color:var(--muted)}
@media(max-width:850px){main,.masthead{padding-left:20px;padding-right:20px}.workspace{grid-template-columns:210px minmax(0,1fr);gap:16px}.paper{padding:18px}.intro-note{display:none}.library-picker>p{display:none}.transport-secondary{flex-wrap:wrap;gap:12px}.transport-secondary>div:last-child{margin-left:auto}.timeline-heading{flex-wrap:wrap}.header-right{gap:10px}.question-heading h2{font-size:25px}}
@media(max-width:620px){main,.masthead{padding-left:16px;padding-right:16px}.masthead{padding-top:15px;padding-bottom:15px}.brand{font-size:24px;gap:10px}.seal{width:34px;height:39px}.header-right{flex-direction:column;gap:5px;align-items:flex-end;font-size:11px}.test-badge{font-size:10px;padding:2px 8px}.intro{padding:22px 0}.intro h1{font-size:28px}.intro .eyebrow{font-size:9px}.library-picker{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:13px;margin-bottom:16px}.library-picker>label{width:auto}.library-picker .set-picker{grid-column:1/-1;max-width:none}.workspace{display:block}.question-panel{position:static;max-height:260px;padding:13px;margin-bottom:20px}.question-panel .panel-heading{margin-bottom:8px}.filter-label{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:4px 0}.filter-label select{width:150px;margin:0;height:36px}.question-group h3{padding-top:8px}.question-group .question-rows{display:flex;gap:6px;flex-wrap:wrap}.question-link{width:auto;min-width:83px;gap:7px;font-size:12px;background:#f4f0e3;padding:7px}.question-link small{font-size:10px}#summary{margin:6px 0}.question-heading{padding:0 0 14px}.question-heading h2{font-size:25px}.paper{padding:17px 15px}.transport{gap:12px}.play{width:52px;height:52px}.timeline-heading strong{font-size:13px}.transport-secondary{margin:17px 0}.transport-secondary button{min-height:44px;padding:6px 9px}.playback-settings{gap:9px;grid-template-columns:1.3fr 1fr 1fr}.playback-settings select{padding-left:7px;padding-right:18px;font-size:13px}.keyboard-hint{display:none}.position{font-size:11px;padding:5px 9px}.option-row{font-size:14px}footer{flex-direction:column;gap:5px}.panel-heading button{font-size:12px}#transcript{font-size:16px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Compact introduction in the masthead leaves room for practice content. */
.masthead{gap:24px}
.header-intro{flex:1;text-align:center;min-width:0}
.header-intro h1{font:600 23px/1.4 var(--serif);margin:0 0 4px}
.header-intro p{font-size:11px;color:var(--muted)}
.library-picker{margin-top:22px}
@media(max-width:850px){.masthead{gap:16px}.header-intro h1{font-size:18px}.header-intro p{font-size:10px}.header-right{flex-direction:column;align-items:flex-end;gap:5px}}
@media(max-width:620px){.masthead{flex-wrap:wrap;gap:12px}.brand{order:0}.header-right{order:1;margin-left:auto}.header-intro{order:2;flex-basis:100%;text-align:left;border-top:1px solid var(--line);padding-top:9px}.header-intro h1{font-size:18px;margin:0}.header-intro p{display:none}.library-picker{margin-top:16px}}

/* Sentence-follow pilot: only the original-text pane scrolls. */
#transcript:has(#sentence-scroll){white-space:normal}
.sentence-toolbar{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin:0 0 8px;font-size:11px;color:var(--muted)}
.sentence-badge{background:#e5ece0;color:#41674f;border-radius:20px;padding:3px 9px}
#sentence-position{margin-right:auto;white-space:nowrap}
.sentence-toolbar button{font-size:11px;min-height:34px;padding:4px 9px}
.sentence-toolbar button[aria-pressed=true]{background:#e4ece3;border-color:#819d8b}
.sentence-help{font-size:11px;color:var(--muted);margin-bottom:12px;line-height:1.6}
#sentence-scroll{max-height:min(52vh,440px);overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;position:relative;padding:6px 5px 40px 0;scroll-padding:20px;overflow-anchor:none}
.sentence-line{display:flex;align-items:baseline;gap:13px;width:100%;border:1px solid transparent;border-left:3px solid transparent;border-radius:5px;text-align:left;padding:11px 12px;margin:2px 0;line-height:1.95;font-size:16px;white-space:pre-wrap;color:#506b79;background:transparent}
.sentence-line time{font:11px/1.8 ui-monospace,monospace;flex:none;white-space:nowrap;color:#80918f}
.sentence-line span{overflow-wrap:anywhere;min-width:0}
.sentence-line.is-current{background:#e1ebe3;color:#173f51;border-left-color:#a34531;font-weight:600}
.sentence-line.is-current time{color:#a34531}
.sentence-line:hover:not(:disabled){background:#edf0e5}
.sentence-line.is-current:hover:not(:disabled){background:#dce8df}
.sentence-section{font-size:13px;font-weight:600;padding:15px 12px 5px;border-top:1px solid var(--line);margin-top:10px}
.sentence-unmatched{font-size:13px;color:var(--muted);padding:12px;white-space:pre-wrap}
.sentence-unmatched small{display:block;font-size:10px;line-height:1.5}
@media(max-width:620px){#sentence-scroll{max-height:48vh}.sentence-line{font-size:16px;padding:10px 7px;gap:8px}.sentence-line time{font-size:10px}.sentence-toolbar{gap:6px}.sentence-toolbar button{min-height:40px}.sentence-toolbar #sentence-current{margin-left:auto}}


/* Karaoke color advances through each character, never the entire active line. */
.sentence-line.is-current{background:transparent;border-left-color:transparent;font-weight:400;color:#506b79}
.sentence-line.is-current:hover:not(:disabled){background:#edf0e5}
.sentence-line.is-current time{color:#80918f}
.karaoke-char{color:inherit}
.sentence-line.is-past .karaoke-char{color:#a34531;opacity:.72}
.karaoke-char.is-read{color:#a34531}
.karaoke-char.is-singing{color:transparent;background:linear-gradient(90deg,#a34531 var(--karaoke-fill,0%),#506b79 var(--karaoke-fill,0%));-webkit-background-clip:text;background-clip:text}

/* Keep the current sentence located while its characters fill with the voice. */
.sentence-line.is-current{background:#e4ece3;border-left-color:#a34531;font-weight:400;color:#244c67}
.sentence-line.is-current:hover:not(:disabled){background:#dce8df}
.sentence-line.is-current time{color:#a34531}
.sentence-line.is-current .karaoke-char.is-read{color:#a34531;font-weight:600}
.sentence-line.is-current .karaoke-char.is-singing{background:linear-gradient(90deg,#a34531 var(--karaoke-fill,0%),#244c67 var(--karaoke-fill,0%));-webkit-background-clip:text;background-clip:text}

.sentence-line.is-current .karaoke-char.is-read{font-weight:inherit}

/* Compact synchronized text without shrinking the Japanese type. */
.sentence-line{line-height:1.65;padding:6px 10px;margin:0;min-height:0;gap:10px}
#sentence-scroll{padding-bottom:20px}
.sentence-section{padding:10px 10px 4px;margin-top:6px}
@media(max-width:620px){.sentence-line{line-height:1.65;padding:5px 7px;gap:8px;min-height:0}}

/* Compact player and answer cards, keeping readable type and touch targets. */
#exercise>.paper{padding:15px 18px;margin-bottom:12px}
.transport{gap:13px}
.play{width:48px;height:48px;font-size:21px}
#seek{margin-top:6px;height:18px}
.transport-secondary{margin:12px 0;gap:8px}
.transport-secondary>div{gap:6px}
.transport-secondary button{min-height:34px;padding:4px 10px}
.playback-settings{padding-top:11px;gap:12px}
.playback-settings select{height:35px;margin-top:3px;padding-top:4px;padding-bottom:4px}
#repeat-status{display:inline-block;margin-top:8px;margin-right:16px}
.keyboard-hint{display:inline-block;margin-top:8px;font-size:10px}
#answers h3{margin-bottom:8px}
.option-group{margin-bottom:14px}
.option-group legend{font-size:12px;margin-bottom:5px}
.option-group legend:only-child{margin-bottom:0}
.option-row{padding:7px 10px;margin-bottom:5px;line-height:1.55;min-height:37px;gap:8px}
.option-row input{margin-top:4px}
.check-answer{min-height:34px;padding:5px 12px}
.answer-feedback{margin-top:7px;font-size:13px}
.answer-explanation{margin-top:4px}
.answer-image{margin-bottom:12px}
#exercise .panel-heading{margin-bottom:9px}
@media(max-width:620px){
 #exercise>.paper{padding:13px 14px;margin-bottom:10px}
 .play{width:46px;height:46px}
 .transport-secondary{margin:10px 0;gap:6px;flex-wrap:nowrap}
 .transport-secondary>div{gap:4px}
 .transport-secondary button{min-height:40px;padding:4px 6px;font-size:11px}
 .playback-settings{padding-top:9px;gap:8px}
 .playback-settings select{height:40px}
 .keyboard-hint{display:none}
 #repeat-status{margin-top:6px}
 .option-row{min-height:42px;padding:8px 9px;margin-bottom:4px;font-size:14px}
 .check-answer{min-height:40px}
}
@media(max-width:360px){.transport-secondary{flex-wrap:wrap}}

/* Show only essential controls and keep group labels accessible. */
.visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.transport-secondary{justify-content:flex-end;margin:8px 0}
#repeat-status[hidden],.keyboard-hint[hidden]{display:none!important}

/* Navigation belongs to the question; shortcuts belong to the audio timeline. */
.question-navigation{display:flex;align-items:center;gap:10px;flex-shrink:0}
.question-nav-buttons{display:flex;gap:6px}
.question-nav-buttons button{font-size:12px;min-height:34px;padding:5px 10px}
.playback-shortcuts{font-size:11px;color:var(--muted);margin:6px 0 10px 61px;line-height:1.7;display:flex;gap:14px;flex-wrap:wrap}
.playback-shortcuts span{white-space:nowrap}
.playback-shortcuts kbd{font:inherit;color:var(--ink)}
@media(max-width:850px){.question-navigation{flex-direction:column;align-items:flex-end;gap:5px}.question-heading{gap:10px}}
@media(max-width:620px){.question-heading h2{font-size:23px}.question-nav-buttons{gap:5px}.question-nav-buttons button{font-size:11px;padding:5px 8px;min-height:38px}.question-navigation .position{padding:2px 8px}.playback-shortcuts{margin:6px 0 9px;font-size:10px;gap:3px 10px}.question-heading .eyebrow{font-size:10px}}

/* Let expanded transcripts use the document scroll, at every viewport size. */
#sentence-scroll{height:auto;max-height:none;overflow:visible;overscroll-behavior:auto;padding-bottom:0}

/* The practice section is a shortcut/skip-link target, not a control. */
#practice:focus, #practice:focus-visible { outline: none; }

.sentence-line.is-looping{box-shadow:inset 0 0 0 1px #286b55}.sentence-line.is-looping time::after{content: " ↻";color:#286b55}#sentence-loop[aria-pressed=true]{background:#e0eadd;border-color:#719080}

/* Paper-toned dock, visually shared with the listening page. */
body{padding-bottom:calc(140px + env(safe-area-inset-bottom,0px))}
.mobile-player{--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px);--safe-left:env(safe-area-inset-left,0px);--safe-right:env(safe-area-inset-right,0px);position:fixed;z-index:30;left:0;top:0;width:min(336px,calc(100vw - 20px));padding:0 12px 10px;background:var(--paper);color:var(--ink);border:1px solid #bbc9c3;border-radius:12px;box-shadow:0 2px 10px #244c6714}
.mobile-player[hidden],.mobile-loop-row[hidden]{display:none!important}
#mobile-drag{display:flex;align-items:center;justify-content:center;width:100%;height:36px;min-height:36px;padding:0;border:0;border-radius:0;background:transparent;cursor:grab;touch-action:none;user-select:none;-webkit-user-select:none}
#mobile-drag::after{content:'';width:26px;height:3px;border-radius:4px;background:#b6c2bc}
#mobile-drag:hover::after,.dragging #mobile-drag::after{background:var(--muted)}
.dragging #mobile-drag{cursor:grabbing}
.mobile-meta{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:10px;line-height:1.3;color:var(--muted);margin:0 1px 7px}
#mobile-title{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#mobile-time{white-space:nowrap;font-variant-numeric:tabular-nums}
.mobile-buttons{display:flex;align-items:center;justify-content:space-between;gap:8px}
.mobile-buttons button{display:flex;align-items:center;justify-content:center;min-height:56px;width:68px;padding:0;border:0;border-radius:50%;background:transparent;color:var(--ink);font-size:16px;touch-action:manipulation}
.mobile-buttons button:hover:not(:disabled){background:#e8ede3}
.mobile-buttons button:active:not(:disabled){background:#dce5d9}
#mobile-play,#mobile-play:hover:not(:disabled),#mobile-play:focus{width:56px;height:56px;flex:0 0 56px;border-radius:50%;background:var(--ink);color:var(--paper);-webkit-text-fill-color:var(--paper);font-size:21px;line-height:1}
#mobile-play:active:not(:disabled){background:#18394d;transform:scale(.95)}
.mobile-loop-row{display:flex;align-items:center;justify-content:space-between;gap:6px;border-top:1px solid var(--line);margin-top:8px;padding-top:5px;font-size:11px;color:var(--green)}
.mobile-loop-row button{min-height:44px;padding:2px 5px;border:0;color:var(--green);font-size:11px}
.mobile-player[data-edge=left],.mobile-player[data-edge=right]{width:84px;padding:0 7px 10px;border-radius:0 12px 12px 0}
.mobile-player[data-edge=right]{border-radius:12px 0 0 12px}
.mobile-player[data-edge=left] .mobile-buttons,.mobile-player[data-edge=right] .mobile-buttons{flex-direction:column;gap:20px}
.mobile-player[data-edge=left] .mobile-meta,.mobile-player[data-edge=right] .mobile-meta{display:none}
.mobile-player[data-edge=left] #mobile-drag::after,.mobile-player[data-edge=right] #mobile-drag::after{width:18px}
.mobile-player[data-edge=left] .mobile-loop-row,.mobile-player[data-edge=right] .mobile-loop-row{flex-direction:column;gap:0;font-size:10px;padding-top:3px}
.mobile-player[data-edge=left] .mobile-loop-row span,.mobile-player[data-edge=right] .mobile-loop-row span{font-size:0}
.mobile-player[data-edge=left] .mobile-loop-row span::after,.mobile-player[data-edge=right] .mobile-loop-row span::after{content:'↻ 循环中';font-size:10px}
.mobile-player[data-edge=left] #mobile-loop-off,.mobile-player[data-edge=right] #mobile-loop-off{font-size:10px;padding:2px 0}
.mobile-player[data-edge=top]{border-radius:0 0 12px 12px;padding-top:env(safe-area-inset-top,0px)}
.mobile-player[data-edge=bottom]{border-radius:12px 12px 0 0;padding-bottom:max(10px,env(safe-area-inset-bottom,0px))}
@media(pointer:coarse){.playback-shortcuts{display:none}}

/* Touch feedback lasts only while pressing; no sticky hover tint. */
#mobile-back,#mobile-forward,#mobile-back:hover:not(:disabled),#mobile-forward:hover:not(:disabled),#mobile-back:focus,#mobile-forward:focus{background:transparent;color:var(--ink);border-radius:10px;flex-direction:column;gap:2px}
#mobile-back:active:not(:disabled),#mobile-forward:active:not(:disabled){background:#dfe7db;transform:scale(.96)}
#mobile-back svg,#mobile-forward svg{width:25px;height:25px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
#mobile-back span,#mobile-forward span{font-size:12px;line-height:1.3}
/* Phone layout stays compact while preserving 48px touch targets. */
@media(max-width:600px){
 .mobile-player{width:min(260px,calc(100vw - 16px));padding:0 10px 8px}
 .mobile-player[data-edge=left],.mobile-player[data-edge=right]{width:64px;padding:0 7px 8px}
 #mobile-drag{height:28px;min-height:28px}
 .mobile-buttons button{width:48px;min-height:48px}
 #mobile-play,#mobile-play:hover:not(:disabled),#mobile-play:focus{width:48px;height:48px;flex-basis:48px;font-size:18px}
 .mobile-player[data-edge=left] .mobile-buttons,.mobile-player[data-edge=right] .mobile-buttons{gap:8px}
 #mobile-back svg,#mobile-forward svg{width:22px;height:22px}
 .mobile-meta{margin-bottom:5px}
}

@media not all and (any-pointer: coarse){body{padding-bottom:0}#mobile-player{display:none!important}}

/* The transcript region receives playback keys without a page-sized focus frame. */
#sentence-scroll:focus, #sentence-scroll:focus-visible { outline: none; }

/* Printed paragraphs and embedded original material. */
.question-prompt{white-space:pre-wrap;overflow-wrap:anywhere;font-weight:400;line-height:1.95;margin:0 0 22px}
.option-row>span[lang="ja"]{white-space:pre-wrap;overflow-wrap:anywhere;min-width:0}
.answer-image.embedded-material{max-height:none;height:auto}