:root{--paper:#fafaf8;--ink:#252c29;--muted:#7a827d;--line:#e5e7e2;--green:#285c4b;--green-light:#edf3ef;--serif:'Lyric Serif JP','Yu Mincho','Noto Serif JP','Songti SC',serif;--sans:'Segoe UI','Yu Gothic','Microsoft YaHei',sans-serif}
.scope-switch{display:flex;align-items:center;flex-shrink:0;gap:2px;padding:3px;background:#edf0ea;border:1px solid var(--line);border-radius:8px}.scope-switch button{min-height:38px;min-width:52px;padding:7px 13px;border-radius:5px;background:transparent;color:var(--muted);font-size:12px;white-space:nowrap}.scope-switch button[aria-pressed="true"]{background:var(--green);color:#fff}.scope-switch button:hover:not([aria-pressed="true"]){color:var(--ink)}@media(max-width:700px){.scope-switch button{min-height:42px;min-width:44px;padding:7px 10px}}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:14px}button,input{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;border:0}button:focus-visible,input:focus-visible{outline:2px solid var(--green);outline-offset:4px}button:disabled{opacity:.3;cursor:default}[hidden]{display:none!important}
.topbar{height:88px;display:flex;align-items:center;justify-content:space-between;max-width:1400px;padding:0 40px;margin:auto;border-bottom:1px solid var(--line)}.song-title{display:flex;align-items:baseline;gap:18px}.song-title h1{font-family:var(--serif);font-size:26px;font-weight:500;letter-spacing:3px;margin:0}.song-title>span{color:var(--muted);font-size:12px}.quiet-button{padding:9px 15px;color:var(--ink);background:transparent;border:1px solid var(--line);border-radius:6px;font-size:12px}.quiet-button:hover{background:var(--green-light)}.quiet-button.active{background:var(--green);border-color:var(--green);color:white}
.layout{display:grid;grid-template-columns:280px minmax(0,1fr);max-width:1400px;margin:auto}.sidebar{padding:28px 20px 24px 32px;border-right:1px solid var(--line);height:calc(100dvh - 88px);position:sticky;top:0;display:flex;flex-direction:column}.side-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.side-heading h2{font-size:13px;font-weight:600;margin:0}.count{color:var(--muted);font-size:11px;font-variant-numeric:tabular-nums}.search{display:flex;margin-bottom:16px}.search input{background:#f0f1ed;border:1px solid transparent;border-radius:6px;width:100%;color:var(--ink);font:inherit;font-size:12px;padding:10px 12px}.search input::placeholder{color:#899089}#lyric-list{overflow:auto;flex:1;scrollbar-width:thin;scrollbar-color:#d4d9d2 transparent;padding-right:5px}.group-title{margin:22px 10px 8px;color:var(--muted);font-size:10px}.group-title:first-child{margin-top:4px}.line-button{display:flex;text-align:left;width:100%;gap:10px;padding:11px 10px;border-radius:5px;background:transparent;color:var(--ink);font-size:12px;line-height:1.7;margin-bottom:2px;transition:background .15s}@media(hover:hover) and (pointer:fine){.line-button:hover:not(.current){background:#f0f2ed}}.line-button.current{background:var(--green-light);color:var(--green)}.line-button .index{font-size:10px;font-variant-numeric:tabular-nums;color:var(--muted);padding-top:2px;min-width:18px}.line-button.current .index{color:var(--green)}.line-snippet{overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.line-button.current .line-snippet{font-weight:600}
.workspace{padding:32px clamp(28px,5vw,76px) 32px;min-width:0}.lesson{min-height:260px;display:flex;flex-direction:column}.lesson-top{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:11px}.sentence-number{font-variant-numeric:tabular-nums;letter-spacing:1px}.tokens{display:flex;flex-wrap:wrap;justify-content:center;align-content:center;gap:24px 8px;flex:1;padding:36px 0;min-height:200px}.word{display:flex;align-items:center;flex-direction:column;border-radius:5px;padding:6px 7px;transition:background .15s}.word .jp{font-family:var(--serif);font-size:30px;letter-spacing:1px;line-height:1.6;white-space:nowrap}.word .romaji{font-size:13px;color:var(--muted);margin-top:8px;white-space:nowrap}.word.playing{background:var(--green-light)}.word.playing .jp,.word.playing .romaji{color:var(--green)}
.player{border-top:1px solid var(--line);padding-top:22px}.player-top{display:flex;justify-content:space-between;align-items:center;gap:12px}.mode-tabs{display:flex;gap:24px}.mode-tabs button{background:transparent;border-bottom:2px solid transparent;padding:0 1px 11px;color:var(--muted);font-size:13px}.mode-tabs button.active{color:var(--green);border-bottom-color:var(--green);font-weight:600}.source-time{font-size:11px;white-space:nowrap;color:var(--muted);font-variant-numeric:tabular-nums}.speed-row{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:20px;font-size:11px;color:var(--muted)}.speed-buttons{display:flex;gap:3px;padding:3px;background:#f0f2ee;border-radius:6px}.speed-buttons button{border-radius:4px;padding:7px 13px;background:transparent;color:var(--muted);font-size:11px}.speed-buttons button.selected{background:white;color:var(--green);box-shadow:0 1px 3px #24382b0d}
.transport{display:flex;justify-content:center;align-items:center;position:relative;gap:22px;margin-top:30px}.round-button{height:40px;width:40px;border-radius:50%;background:transparent;color:var(--ink);font-size:28px;font-family:Arial}.round-button:hover,.restart:hover{background:#edf0ea}.play-button{display:flex;align-items:center;justify-content:center;gap:11px;border-radius:7px;background:var(--green);color:white;min-width:140px;height:46px;font-size:13px}.play-button:hover{background:#204a3c}#play-icon{font-size:10px}.restart{position:absolute;right:0;font-size:22px;color:var(--muted);background:transparent;width:36px;height:36px;border-radius:5px}.progress-row{display:flex;align-items:center;gap:13px;margin-top:26px;font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}.progress-row input{appearance:none;-webkit-appearance:none;width:100%;height:3px;background:#dce1d9;border-radius:5px;cursor:pointer;accent-color:var(--green);margin:8px 0}.progress-row input::-webkit-slider-thumb{appearance:none;width:10px;height:10px;border-radius:50%;background:var(--green)}.progress-row input::-moz-range-thumb{width:10px;height:10px;border:0;border-radius:50%;background:var(--green)}.practice-options{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-top:26px;font-size:11px;color:var(--muted)}.practice-options label{display:flex;align-items:center;gap:7px;cursor:pointer;white-space:nowrap}.practice-options input{accent-color:var(--green);width:13px;height:13px;margin:0}.download{margin-left:auto;background:transparent;color:var(--muted);font-size:11px;padding:5px 0}.download:hover{color:var(--green)}.status{margin-top:20px;font-size:12px;line-height:1.6}.status.error{color:#a2482f}.empty{padding:20px 10px;color:var(--muted);font-size:12px}
@media(min-width:1600px){.workspace{padding-top:60px}.lesson{min-height:370px}.word .jp{font-size:34px}.tokens{gap:28px 12px}}@media(max-width:1000px){.layout{grid-template-columns:230px minmax(0,1fr)}.sidebar{padding:26px 14px 20px 20px}.workspace{padding:36px 28px}.word .jp{font-size:26px}.word .romaji{font-size:12px}.practice-options{gap:16px}.download{margin-left:0}}@media(max-width:700px){.topbar{height:72px;padding:0 20px}.song-title h1{font-size:23px}.song-title{gap:12px}.layout{display:flex;flex-direction:column}.workspace{padding:25px 20px 30px;order:1}.lesson{min-height:280px}.tokens{padding:35px 0;gap:20px 4px;min-height:240px}.word{padding:4px 5px}.word .jp{font-size:25px}.word .romaji{font-size:11px}.sidebar{position:static;height:auto;order:2;border-right:0;border-top:1px solid var(--line);padding:24px 20px}#lyric-list{max-height:380px}.source-time{font-size:10px}.transport{gap:15px}.play-button{min-width:130px}.practice-options{gap:15px 20px}.download{margin-left:auto}.speed-buttons button{padding:7px 11px}.restart{width:30px}.round-button{width:32px}}
/* Directory disclosure keeps the desktop index visible and mobile navigation compact. */
.side-heading{list-style:none;cursor:default}.side-heading::-webkit-details-marker{display:none}.list-title{font-size:13px;font-weight:600}.drawer-chevron{display:none}.sidebar-content{display:flex;flex-direction:column;min-height:0;flex:1}.side-heading:focus-visible{outline:2px solid var(--green);outline-offset:4px}.progress-row input{height:24px;background:linear-gradient(var(--line),var(--line)) center/100% 3px no-repeat;touch-action:pan-y}button{touch-action:manipulation}
@media(max-width:700px){
 body{padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}
 .topbar{height:76px;padding:0 22px}.song-title h1{font-size:25px}.song-title{gap:10px}.song-title>span{font-size:11px}.quiet-button{min-height:44px;font-size:12px;padding:10px 14px}
 .layout{max-width:600px;margin:auto}.sidebar{order:0;width:100%;padding:0 22px;border-top:0;border-bottom:1px solid var(--line);height:auto;display:block}
 .side-heading{cursor:pointer;margin:0;min-height:54px;display:flex;gap:10px}.list-title{font-size:12px;font-weight:500}.count{margin-left:auto}.drawer-chevron{display:block;font-size:19px;color:var(--muted);transition:transform .2s}.sidebar[open] .drawer-chevron{transform:rotate(180deg)}
 .sidebar-content{padding:0 0 16px}.search{margin:0 0 12px}.search input{font-size:16px;min-height:44px}.sidebar:not([open]) .sidebar-content{display:none}#lyric-list{max-height:48dvh;overscroll-behavior:contain}.line-button{padding:13px 10px;font-size:13px;min-height:48px}.group-title{font-size:11px}
 .workspace{order:1;padding:24px 22px 30px;width:100%}.lesson{min-height:260px}.lesson-top{font-size:12px}.tokens{padding:32px 0 40px;gap:20px 3px;min-height:225px}.word{padding:4px 5px;max-width:100%}.word .jp{font-size:27px;letter-spacing:.3px}.word .romaji{font-size:12px;margin-top:6px;white-space:normal;text-align:center;overflow-wrap:anywhere}.word .jp{white-space:normal;overflow-wrap:anywhere}
 .player{padding-top:16px}.mode-tabs{gap:6px;background:#edf0ea;border-radius:8px;padding:3px}.mode-tabs button{padding:0 18px;min-height:42px;border:0;border-radius:6px;font-size:14px}.mode-tabs button.active{background:#fff;box-shadow:0 1px 3px #25372a0a}.source-time{font-size:10px}.speed-row{margin-top:18px;gap:12px;flex-wrap:wrap}.speed-row>span{font-size:12px}.speed-buttons{gap:0;padding:3px}.speed-buttons button{min-height:42px;min-width:48px;font-size:12px;padding:7px 12px}
 .transport{display:grid;grid-template-columns:48px minmax(120px,1fr) 48px 44px;gap:10px;margin-top:24px}.round-button{width:48px;height:52px;background:#f0f2ee;border-radius:8px;font-size:30px}.play-button{height:52px;min-width:0;border-radius:8px;font-size:14px}.restart{position:static;width:44px;height:52px;font-size:25px;background:#f0f2ee;border-radius:8px}
 .progress-row{margin-top:18px;font-size:12px;gap:12px}.progress-row input{height:32px}.progress-row input::-webkit-slider-thumb{width:16px;height:16px}.progress-row input::-moz-range-thumb{width:16px;height:16px}
 .practice-options{display:grid;grid-template-columns:1fr 1fr;gap:6px 12px;margin-top:16px;font-size:12px}.practice-options label{min-height:44px;gap:9px}.practice-options input{width:17px;height:17px}.download{min-height:44px;margin-left:0;justify-self:end;padding:8px 12px;font-size:12px}.status{font-size:12px}
}
@media(max-width:370px){.topbar,.sidebar{padding-left:16px;padding-right:16px}.workspace{padding-left:16px;padding-right:16px}.word .jp{font-size:25px}.source-time{font-size:9px}.speed-buttons button{padding:7px 10px}.transport{gap:7px;grid-template-columns:44px minmax(100px,1fr) 44px 40px}.round-button{width:44px}.restart{width:40px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media(max-width:700px){.lesson{min-height:230px}.tokens{padding:24px 0 28px;gap:16px 0;min-height:205px}.word .jp{font-size:24px}.word .romaji{font-size:11px}.workspace{padding-top:20px}.player{padding-top:14px}.transport{margin-top:20px}.practice-options{margin-top:10px}}

.library-bar{max-width:1400px;margin:auto;padding:16px 40px;display:flex;align-items:center;gap:22px;border-bottom:1px solid var(--line)}.library-bar>label{font-size:12px;color:var(--muted)}.library-bar select{font:inherit;color:var(--ink);background:#f0f2ee;border:1px solid var(--line);border-radius:6px;min-height:44px;padding:8px 34px 8px 12px;width:min(100%,380px);cursor:pointer}.sidebar{height:calc(100dvh - 165px)}select:focus-visible{outline:2px solid var(--green);outline-offset:3px}@media(max-width:700px){.library-bar{padding:12px 22px;gap:14px}.library-bar>label{display:none}.library-bar select{width:100%;font-size:16px;min-height:48px}.sidebar{height:auto}.topbar{height:68px}.song-title h1{font-family:var(--sans);font-size:20px;letter-spacing:1px}.workspace{padding-top:16px}.tokens{min-height:185px}.lesson{min-height:210px}}@media(max-width:370px){.library-bar{padding-left:16px;padding-right:16px}}

.translation-toggle{display:flex;align-items:center;gap:6px;margin-left:auto;margin-right:22px;cursor:pointer;font-size:11px;min-height:32px}.translation-toggle input{accent-color:var(--green);margin:0;width:13px;height:13px}.translation{font-size:14px;line-height:1.9;text-align:center;color:#5d6961;margin:0 0 28px;padding:0 16px;white-space:pre-line}@media(max-width:700px){.translation-toggle{min-height:44px;margin-right:18px;font-size:12px;gap:7px}.translation-toggle input{width:16px;height:16px}.translation{font-size:14px;line-height:1.8;margin-bottom:26px;padding:0 4px}.lesson-top{gap:8px}.translation-toggle{margin-left:auto}}

/* Compact title and playback controls. */
.topbar{gap:20px}.song-title{margin:0;min-width:0;flex:1;display:block}.song-title select{appearance:auto;font-family:var(--serif);font-size:26px;font-weight:500;letter-spacing:.5px;color:var(--ink);background:transparent;border:0;border-radius:4px;padding:8px 24px 8px 0;max-width:100%;min-height:48px;cursor:pointer;text-overflow:ellipsis}.song-title select option{font-family:var(--sans);font-size:15px;letter-spacing:0}.quiet-button{flex-shrink:0}.sidebar{height:calc(100dvh - 88px)}.section-meta{display:flex;align-items:center;gap:16px;min-width:0}.source-time{display:inline!important;font-size:10px;white-space:nowrap;font-variant-numeric:tabular-nums}.player-top{display:flex;align-items:center;justify-content:space-between;gap:16px}.speed-row{margin:0;display:flex;align-items:center;gap:0}.mode-tabs button{min-height:38px;padding-bottom:8px}.speed-buttons button{min-width:48px;min-height:36px}.translation-toggle{margin-right:18px}.practice-options{justify-content:flex-start}
@media(max-width:700px){.topbar{height:76px;padding:0 20px;gap:12px}.song-title select{font-size:21px;min-height:48px;width:100%;padding-right:12px;letter-spacing:0}.quiet-button{padding:8px 12px;font-size:11px}.sidebar{height:auto}.workspace{padding-top:16px}.section-meta{gap:8px}.source-time{font-size:9px}.lesson-top{gap:6px;flex-wrap:wrap}.translation-toggle{font-size:11px;margin-right:8px;min-height:40px}.sentence-number{font-size:10px}.player-top{gap:10px;flex-wrap:nowrap}.mode-tabs{gap:0;padding:3px;flex-shrink:0}.mode-tabs button{padding:0 13px;min-height:40px;font-size:13px}.speed-buttons button{font-size:12px;padding:6px 10px;min-width:45px;min-height:40px}.speed-row{flex-shrink:0}.practice-options{display:flex;flex-wrap:wrap;gap:4px 18px}.practice-options label{min-height:40px}.section-tag{font-size:11px}.translation{margin-bottom:24px}}
@media(max-width:370px){.topbar{padding:0 16px;gap:8px}.song-title select{font-size:19px}.mode-tabs button{padding:0 10px}.speed-buttons button{min-width:41px;padding:6px 8px}.player-top{gap:6px}.translation-toggle{margin-right:2px}.section-meta{gap:5px}.source-time{font-size:8px}.lesson-top{column-gap:3px}}
/* The full-song player has no practice-only audio selector. */
#audio-type[hidden]+.speed-row{margin-left:auto}
@media(max-width:700px){.topbar{height:auto;min-height:76px;flex-wrap:wrap;gap:8px;padding-top:12px;padding-bottom:12px}.song-title{flex-basis:100%}.scope-switch{width:100%}.scope-switch button{flex:1}}

/* The directory doubles as the contiguous-range selector. */
.directory-range{padding:0 0 14px;margin-bottom:14px;border-bottom:1px solid var(--line)}.range-guidance{display:flex;align-items:center;justify-content:space-between;gap:8px;color:var(--green);font-size:11px}.range-guidance button{font-size:11px;padding:7px 9px;background:var(--green-light);color:var(--green);border-radius:5px;min-height:32px}.section-summary{color:var(--muted);font-size:10px;line-height:1.6;margin-top:4px;font-variant-numeric:tabular-nums}.line-button.in-range{background:var(--green-light)}.line-button.range-start{background:#e3ece6;color:var(--green)}.scope-switch button{padding-left:11px;padding-right:11px}
/* The measured player height reserves space for every mode and screen size. */
:root{--player-height:230px}html{scroll-padding-bottom:calc(var(--player-height) + 24px)}.layout{padding-bottom:calc(var(--player-height) + 24px)}.sidebar{height:calc(100dvh - 88px - var(--player-height));min-height:180px}.player{position:fixed;left:0;right:0;bottom:0;z-index:20;display:grid;grid-template-columns:minmax(260px,1fr) minmax(300px,1fr);column-gap:48px;row-gap:8px;padding:12px max(24px,calc((100vw - 1120px)/2)) calc(12px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:var(--paper);box-shadow:0 -8px 28px #25372a06}.player-top{grid-column:1;grid-row:1;min-width:0}.transport{grid-column:2;grid-row:1;margin:0;gap:16px;padding-right:44px;min-height:46px}.progress-row{grid-column:1/-1;margin:0;min-width:0}.practice-options{grid-column:1/-1;margin:0;justify-content:center;gap:4px 24px}.practice-options label{min-height:30px}.status{grid-column:1/-1;margin:0}.player .speed-row{margin-top:0}
@media(max-width:700px){body{padding-bottom:0}.layout{padding-bottom:calc(var(--player-height) + 20px)}.sidebar{height:auto;min-height:0}.sidebar[open] #lyric-list{max-height:max(160px,calc(100dvh - var(--player-height) - 300px))}.directory-range{padding-bottom:10px;margin-bottom:12px}.range-guidance{font-size:12px}.range-guidance button{min-height:36px}.section-summary{font-size:11px}.scope-switch button{padding-left:7px;padding-right:7px;font-size:12px}.player{grid-template-columns:minmax(0,1fr);column-gap:0;row-gap:8px;padding:10px max(20px,env(safe-area-inset-left)) calc(10px + env(safe-area-inset-bottom)) max(20px,env(safe-area-inset-right))}.player-top,.transport{grid-column:1;grid-row:auto}.transport{padding-right:0;gap:10px;grid-template-columns:44px minmax(100px,1fr) 44px 40px;min-height:46px}.round-button{width:44px;height:46px}.restart{width:40px;height:46px}.play-button{height:46px}.progress-row{gap:10px;font-size:11px}.progress-row input{height:24px}.practice-options{gap:0 16px;font-size:11px;justify-content:flex-start}.practice-options label{min-height:32px}.practice-options input{width:15px;height:15px}.mode-tabs button{min-height:38px}.speed-buttons button{min-height:38px}}
@media(max-width:370px){.player{padding-left:16px;padding-right:16px}.transport{gap:7px;grid-template-columns:40px minmax(90px,1fr) 40px 36px}.round-button{width:40px}.restart{width:36px}.practice-options{gap:0 12px;font-size:10px}}

.sidebar:not([open]){height:auto;min-height:0}.sidebar:not([open]) .sidebar-content{display:none}.side-heading{cursor:pointer;gap:10px}.sidebar:not([open]) .side-heading{margin-bottom:0}.count{margin-left:auto}.drawer-chevron{display:block;font-size:19px;color:var(--muted);transition:transform .2s}.sidebar[open] .drawer-chevron{transform:rotate(180deg)}

/* A modal lyric sheet leaves the practice canvas unchanged. */
.title-row{display:flex;align-items:center;gap:14px;flex:1;min-width:0}.topbar .song-title{flex-basis:auto}.lyrics-trigger{display:flex;align-items:center;gap:7px;flex-shrink:0;min-height:42px;padding:8px 12px;border:1px solid var(--line);border-radius:7px;color:var(--green);background:transparent;font-size:12px}.lyrics-trigger:hover{background:var(--green-light)}.layout{display:block;max-width:1120px}.workspace{width:100%;margin:auto}.lyrics-open{overflow:hidden;overscroll-behavior:none}.lyrics-sheet{box-sizing:border-box;width:min(680px,calc(100% - 48px));height:min(720px,calc(100dvh - 64px));max-height:calc(100dvh - 64px);margin:auto;padding:0;border:1px solid var(--line);border-radius:14px;color:var(--ink);background:var(--paper);box-shadow:0 24px 90px #14251e24;overflow:hidden;overscroll-behavior:contain}.lyrics-sheet[open]{display:flex;flex-direction:column}.lyrics-sheet::backdrop{background:#14251e66}.lyrics-sheet-head{display:flex;align-items:center;gap:12px;flex-shrink:0;min-height:68px;padding:12px 18px 12px 24px;border-bottom:1px solid var(--line);position:relative}.lyrics-sheet-head h2{margin:0;font-size:17px;font-weight:500}.lyrics-sheet-head .count{font-size:11px}.lyrics-sheet-head button{display:grid;place-items:center;width:40px;height:40px;flex-shrink:0;background:transparent;color:var(--muted);border-radius:6px;font:26px/1 var(--sans)}.lyrics-sheet-head button:hover{background:var(--green-light)}.lyrics-sheet-content{display:flex;flex-direction:column;flex:1;min-height:0;padding:12px 16px 16px;overflow:hidden}.lyrics-sheet #lyric-list{min-height:0;max-height:none;flex:1;overflow-y:auto;overscroll-behavior:contain;padding:0 4px 8px;scrollbar-width:thin}.lyrics-sheet .line-button{font-size:14px;min-height:52px;padding:12px}.lyrics-sheet .group-title{position:sticky;top:0;z-index:1;margin:0;padding:12px;background:var(--paper);font-size:11px;border-bottom:1px solid var(--line)}.lyrics-sheet .directory-range{flex-shrink:0;margin-bottom:8px;padding:0 8px 10px}
@media(max-width:700px){.title-row{width:100%;flex-basis:100%;gap:10px}.lyrics-trigger{min-height:42px;padding:8px 10px}.lyrics-sheet{position:fixed;inset:calc(16px + env(safe-area-inset-top)) 0 0;width:100%;max-width:100%;height:calc(100dvh - 16px - env(safe-area-inset-top));max-height:calc(100dvh - 16px - env(safe-area-inset-top));margin:0;border:0;border-radius:14px 14px 0 0}.lyrics-sheet-head{padding:18px 12px 8px 18px;min-height:68px}.lyrics-sheet-head:before{content:'';position:absolute;top:7px;left:calc(50% - 17px);width:34px;height:4px;border-radius:4px;background:#d4d9d2}.lyrics-sheet-head h2{font-size:16px}.lyrics-sheet-head .count{font-size:10px}.lyrics-sheet-content{padding:10px 10px calc(12px + env(safe-area-inset-bottom))}.lyrics-sheet .line-button{font-size:14px;line-height:1.8;min-height:56px}.lyrics-sheet .line-snippet{-webkit-line-clamp:unset;display:block;overflow:visible}.lyrics-sheet .group-title{padding-top:10px;padding-bottom:10px}}

.lyrics-sheet .line-button:focus{outline:none}.lyrics-sheet .line-button:focus-visible{outline:1px dashed #7a827d;outline-offset:-3px;box-shadow:none}

/* Mode-specific settings sit above a common, bottom-aligned transport. */
.player{display:flex;flex-direction:column;align-items:stretch;gap:8px;padding-top:10px}.player .scope-switch{align-self:center;width:min(100%,540px);flex-shrink:0}.player .scope-switch button{flex:1}.player .practice-options,.player .player-top,.player .progress-row{width:100%;max-width:900px;align-self:center;margin:0}.player .practice-options{justify-content:center}.player .transport{width:100%;max-width:520px;align-self:center;margin:0}.player .progress-row{flex-shrink:0}.player .practice-options label{min-height:28px}.player .status{align-self:center}.topbar .title-row{width:100%}
@media(max-width:700px){.topbar{min-height:76px;padding-top:8px;padding-bottom:8px}.player{gap:6px;padding-top:8px}.player .scope-switch{width:100%;padding:2px}.player .scope-switch button{min-height:36px;font-size:12px;padding:6px}.player .practice-options{justify-content:flex-start;gap:0 14px}.player .practice-options label{min-height:28px}.player .transport{max-width:none}.player .mode-tabs button,.player .speed-buttons button{min-height:34px}.player .player-top{gap:8px}}

.lyrics-sheet button.group-title{display:flex;align-items:center;justify-content:space-between;width:100%;gap:10px;text-align:left;color:var(--green);cursor:pointer}.lyrics-sheet button.group-title:after{content:attr(data-count) " 句  ›";font-size:10px;color:var(--muted);white-space:nowrap}.lyrics-sheet button.group-title:hover{background:var(--green-light)}.lyrics-sheet button.group-title:focus-visible{outline:0;box-shadow:inset 0 0 0 1px #285c4b40}

.lyrics-sheet:focus{outline:none}.player .progress-row>span{flex:0 0 36px;white-space:nowrap}.player .progress-row>span:last-child{text-align:right}.player .progress-row input{flex:1;min-width:0;width:auto}

.lyrics-sheet button.group-title{position:relative;top:auto}

/* A quiet starting canvas lets the song be chosen before the lyrics. */
.selection-empty{min-height:max(260px,calc(100dvh - var(--player-height) - 180px));display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px}.selection-empty button{padding:13px 24px;border:1px solid #ccd5cd;border-radius:8px;background:transparent;color:var(--green);font-size:14px}.selection-empty p{margin:0;color:var(--muted);font-size:12px;line-height:1.7;text-align:center}.player button:disabled{cursor:default}.lyrics-sheet .line-button{transition:none}.lyrics-sheet .line-button.in-range,.lyrics-sheet .line-button.range-start{background:#eef0eb;color:var(--ink)}.lyrics-sheet .line-button.range-start{box-shadow:inset 2px 0 #89958c}.lyrics-sheet .line-button.current{background:var(--green);color:#fff;box-shadow:none}.lyrics-sheet .line-button.current .index{color:#d8e8df}.lyrics-sheet .line-button.current .line-snippet{font-weight:600}.lyrics-sheet .line-button.current:after{content:'当前句';font-size:10px;font-weight:400;white-space:nowrap;align-self:center;margin-left:auto;color:#deebe3}.lyrics-sheet .line-button.current.is-playing:after{content:'播放中';color:#fff}.word.playing{background:#dcebe1;box-shadow:none}.word.playing .jp{font-weight:600}
@media(hover:none){.lyrics-sheet .line-button:not(.current):hover,.lyrics-sheet .line-button:not(.current):active{background:transparent}.lyrics-sheet .line-button.in-range:not(.current):hover,.lyrics-sheet .line-button.range-start:not(.current):hover{background:#eef0eb}}

.player.full-mode .transport{padding-right:0;grid-template-columns:44px minmax(100px,1fr) 44px}
@media(max-width:370px){.player.full-mode .transport{grid-template-columns:40px minmax(90px,1fr) 40px}}

/* Reserve the same control rows across all three practice modes. */
.player #audio-type[hidden]{display:flex!important;visibility:hidden;pointer-events:none}
.player #restart[hidden]{display:block!important;visibility:hidden;pointer-events:none}
.player .practice-options{min-height:28px}
.unavailable{opacity:.4}
.unavailable label{cursor:default}
.vocal-control{display:flex;align-items:center;gap:12px;width:100%;max-width:900px;align-self:center;min-height:30px;color:var(--muted);font-size:11px}
.vocal-control label{flex:0 0 36px}
.vocal-control input{appearance:none;-webkit-appearance:none;flex:1;min-width:0;height:24px;margin:0;background:linear-gradient(var(--line),var(--line)) center/100% 3px no-repeat;accent-color:var(--green);cursor:pointer}
.vocal-control input::-webkit-slider-thumb{appearance:none;width:12px;height:12px;background:var(--green);border-radius:50%}
.vocal-control input::-moz-range-thumb{width:12px;height:12px;background:var(--green);border:0;border-radius:50%}
.vocal-control input:disabled{cursor:default}
.vocal-control output{flex:0 0 36px;text-align:right;font-variant-numeric:tabular-nums}
.player.full-mode .transport{padding-right:44px}
@media(max-width:700px){.player.full-mode .transport{padding-right:0;grid-template-columns:44px minmax(100px,1fr) 44px 40px}.vocal-control{min-height:28px}}
@media(max-width:370px){.player.full-mode .transport{grid-template-columns:40px minmax(90px,1fr) 40px 36px}}

/* A quiet preview sits below the current sentence, above the fixed player. */
.next-line{margin-top:auto;padding:24px 0 8px;text-align:center;color:var(--muted)}
.next-caption{display:block;font-size:10px;letter-spacing:.08em;margin-bottom:12px}
.next-tokens{display:flex;flex-wrap:wrap;justify-content:center;align-items:flex-start;gap:12px 7px}
.next-word{display:flex;flex-direction:column;align-items:center;gap:5px;max-width:100%}
.next-jp{font-family:var(--serif);font-size:17px;line-height:1.6;overflow-wrap:anywhere}
.next-romaji{font-size:10px;line-height:1.5;overflow-wrap:anywhere}
.player .practice-options label:has(input:disabled){opacity:.4;cursor:default}
@media(max-width:700px){.next-line{padding-top:20px}.next-jp{font-size:15px}.next-tokens{gap:12px 6px}.next-caption{margin-bottom:10px}}
/* Fill the space above the player without estimating the header or padding. */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;width:100%;height:100%;overflow:hidden;overscroll-behavior:none;touch-action:pan-y pinch-zoom}
body{position:fixed;inset:0;width:100%;max-width:100%;height:100dvh;min-height:0;overflow:hidden;overscroll-behavior:none;display:flex;flex-direction:column}
.topbar{width:100%;flex-shrink:0;margin:0 auto}
.layout{display:flex;flex-direction:column;flex:1;min-height:0;width:100%;margin:0 auto;padding-bottom:0;overflow:hidden}
.workspace{display:flex;flex-direction:column;flex:1;min-height:0;margin:0 auto;padding-bottom:12px;overflow-x:hidden;overflow-y:auto;overscroll-behavior:none;touch-action:pan-y pinch-zoom;scrollbar-width:thin;scrollbar-gutter:stable both-edges}
.lesson{flex:1 0 auto;min-height:0}
.lesson .tokens{flex:1 0 auto}
.lesson .next-line{flex:0 0 auto}
/* Keep controls in the viewport flow: safe-area padding reserves its own space. */
.player{position:relative;flex:0 0 auto;width:100%;left:auto;right:auto;bottom:auto}
.selection-empty{flex:1 0 auto;min-height:0;padding:16px 0}
.word{max-width:100%;min-width:0;transition:none}
.word .jp,.word.playing .jp{font-weight:400}
.word .jp,.word .romaji{white-space:normal;overflow-wrap:anywhere;text-align:center}
@media(min-width:701px) and (max-height:800px){
 .lesson .tokens{min-height:145px;padding:12px 0;gap:16px 8px}
 .lesson .translation{margin-bottom:12px}
 .next-line{padding-top:12px;padding-bottom:4px}.next-caption{margin-bottom:8px}
}
@media(max-width:700px) and (max-height:760px){
 .lesson .tokens{min-height:150px;padding:14px 0;gap:12px 6px}
 .lesson .translation{margin-bottom:12px}
 .next-line{padding-top:12px;padding-bottom:4px}.next-caption{margin-bottom:8px}
}
.single-song .song-title select:disabled{opacity:1;color:var(--ink);-webkit-text-fill-color:var(--ink);background-image:none;cursor:default;padding-right:0}
.single-song .song-title select:disabled{appearance:none;-webkit-appearance:none}

.mora-enabled .romaji{word-spacing:normal;overflow-wrap:normal;word-break:normal}.player .practice-options{column-gap:16px}@media(max-width:700px){.player .practice-options{column-gap:10px;row-gap:0;font-size:10px}.player .practice-options label{gap:5px}}

.player .status:not([hidden]){display:block;min-height:18px;margin:0;font-size:11px;line-height:1.5;text-align:center;color:var(--muted)}.player .status.error{color:#a2482f}.play-button[aria-busy="true"]{background:#466f60}

/* Announce playback state without adding any row or changing control geometry. */
.player #status{position:absolute;width:1px;height:1px;min-height:0;margin:-1px;padding:0;border:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.play-button{white-space:nowrap}

/* Fixed-size monochrome control icons; no additional layout rows. */
#play-icon{display:block;width:18px;height:18px;flex:0 0 18px;overflow:visible}
.play-button svg > *{display:none}
.play-button:not([data-play-state]) .icon-play,.play-button[data-play-state="play"] .icon-play,.play-button[data-play-state="pause"] .icon-pause,.play-button[data-play-state="loading"] .icon-loading,.play-button[data-play-state="retry"] .icon-retry{display:block}
.play-button[data-play-state="loading"] #play-icon{animation:play-loading .9s linear infinite}
@keyframes play-loading{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){.play-button[data-play-state="loading"] #play-icon{animation:none}}

/* Balanced lyric rows preserve complete Japanese/romanization word pairs. */
.tokens .word{flex:0 0 auto;width:max-content}.lyric-row{display:flex;flex:0 0 100%;justify-content:center;align-items:flex-start;gap:inherit;min-width:0;max-width:100%}

/* Native ruby keeps kana attached to its kanji at every line width. */
.jp ruby,.next-jp ruby{ruby-position:over;ruby-align:center}.jp rt,.next-jp rt{font-family:var(--sans, sans-serif);font-weight:400;font-size:.38em;line-height:1;letter-spacing:0;color:var(--muted)}.word.playing rt{color:var(--green)}.next-jp rt{font-size:.5em}

/* Each visual row shares its Japanese track, with ruby above and romaji below. */
.tokens .word,.next-word{display:grid;grid-template-columns:minmax(0,auto);align-content:start;justify-items:center}.word .jp,.next-word .next-jp{align-self:end}

/* Hide focus decoration without interrupting text entry or keyboard controls. */
:focus,:focus-visible{outline:none!important}
button:focus,input:focus,select:focus,textarea:focus,a:focus,[tabindex]:focus{box-shadow:none!important}