@charset "UTF-8";
:root{--paper:#f5f3ed;--ink:#262b29;--muted:#747a73;--line:#dedfd6;--accent:#c7512e;--accent-soft:#f3e6dc;--green:#466b52;--dark:#242e2b;--radius:14px;color-scheme:light;font-family:"Avenir Next","PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink)}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.35;cursor:not-allowed}button,select{touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #d98e56;outline-offset:4px}button svg{pointer-events:none}svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.svg-library{position:absolute;width:0;height:0;overflow:hidden}.page{max-width:1200px;margin:auto;padding:0 44px 260px}.topbar{height:100px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);font-size:30px;font-weight:750;letter-spacing:-1.5px}.brand-mark{position:relative;display:inline-flex;align-items:center;justify-content:center;background:var(--accent);color:white;width:35px;height:35px;border-radius:10px;font-family:Georgia,serif;font-size:32px;font-style:italic;padding-bottom:4px}.brand-mark span{font-size:18px;position:absolute;right:3px;top:0}.brand-dot{color:var(--accent)}.brand-caption{font-size:12px;letter-spacing:1.3px;font-weight:500;color:var(--muted);padding-left:14px;border-left:1px solid var(--line);margin-left:3px}.top-actions{display:flex;align-items:center;gap:13px}.network-status{display:flex;gap:7px;align-items:center;font-size:12px;color:var(--muted)}.network-status i{height:6px;width:6px;border-radius:50%;background:#6e8b65}.network-status.offline i{background:#ba8b4b}.button{border:1px solid #ccd1c4;border-radius:9px;padding:10px 14px;background:transparent;color:var(--ink);display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:12px;font-weight:600;min-height:42px}.button:hover{background:#e9eadf}.button.quiet{border-color:transparent}.intro{padding:50px 0 44px;display:flex;justify-content:space-between;gap:30px;align-items:center}.eyebrow{font-size:10px;letter-spacing:1.9px;font-weight:650;color:var(--muted);margin:0 0 14px}.intro h1{font-size:43px;line-height:1.45;font-weight:650;letter-spacing:-1.8px;margin:0}.intro h1 span{color:var(--accent)}.intro-description{font-size:13px;color:var(--muted);line-height:1.8;margin:13px 0 0}.collection-note{min-width:170px;position:relative;padding:0 23px;border-left:1px solid var(--line);display:flex;gap:14px;align-items:center}.collection-note strong{font-size:61px;line-height:1;font-weight:500;letter-spacing:-4px}.collection-note strong span{font-size:12px;letter-spacing:0;margin-left:5px}.collection-note>span{font-size:11px;line-height:2;color:var(--muted)}.note-lines{position:absolute;bottom:-22px;left:26px;display:flex;gap:4px;height:13px;align-items:center}.note-lines i{width:3px;height:5px;background:#bfcaaf;border-radius:3px}.note-lines i:nth-child(2n){height:13px}.note-lines i:nth-child(3n){height:9px}.workspace{display:grid;grid-template-columns:195px minmax(0,1fr);gap:36px;border-top:1px solid var(--line);padding-top:30px}.sidebar{align-self:start;position:sticky;top:24px}.sidebar>.eyebrow{padding-left:13px;margin-bottom:18px}.lesson-button{display:flex;align-items:center;justify-content:space-between;width:100%;border:0;background:transparent;color:#62685f;border-radius:9px;padding:13px 12px;margin-bottom:5px;font-size:12px;text-align:left;min-height:44px}.lesson-button span:last-child{font-size:10px;font-variant-numeric:tabular-nums;opacity:.65}.lesson-button.active{background:var(--accent-soft);color:#a84327;font-weight:650}.lesson-button:hover{background:#ebe9e1}.sidebar-note{margin:30px 12px 0;border-top:1px solid var(--line);padding-top:22px}.sidebar-note>span{font-size:12px;font-weight:600}.sidebar-note p{font-size:11px;color:var(--muted);line-height:1.9;margin-top:9px}.library-top{display:flex;align-items:center;justify-content:space-between;gap:20px}.library-top .eyebrow{font-size:9px}.library-top h2{font-size:21px;font-weight:600;margin:6px 0 0;letter-spacing:-.4px}.library-top h2 span{font-size:12px;vertical-align:middle;background:#e6e8df;color:#6b7566;padding:3px 7px;border-radius:5px;margin-left:6px;font-weight:500}.list-tools{display:flex;justify-content:space-between;align-items:center;margin:20px 0 6px;min-height:32px;color:var(--muted);font-size:11px}.list-tools>div{display:flex;gap:8px}.text-button{border:0;background:transparent;color:var(--muted);font-size:11px;padding:8px;min-height:36px}.text-button:hover,.text-button[aria-pressed=true]{color:var(--accent)}.phrase-list{border-top:1px solid var(--line)}.phrase{position:relative;display:flex;align-items:center;gap:16px;border-bottom:1px solid var(--line);min-height:90px;padding:15px 6px 15px 0;transition:background .15s}.phrase.active{background:#eeeee3;box-shadow:inset 3px 0 #bf5530}.phrase.active .phrase-index{color:var(--accent)}.phrase.removed{opacity:.57}.phrase-main{display:flex;gap:17px;align-items:center;flex:1;text-align:left;border:0;background:transparent;padding:5px 0 5px 10px;color:inherit;min-width:0}.phrase-main:hover .phrase-en{color:var(--accent)}.phrase-index{color:#a3a79d;font-size:11px;min-width:24px;font-variant-numeric:tabular-nums}.phrase-copy{display:block;min-width:0}.phrase-en{display:block;font-family:"Avenir Next","Trebuchet MS",sans-serif;font-size:15px;font-weight:550;line-height:1.55;letter-spacing:-.15px}.phrase-zh{display:block;font-size:12px;color:var(--muted);margin-top:5px;line-height:1.65}.phrase.active .phrase-en.is-speaking,.phrase.active .phrase-zh.is-speaking{color:var(--accent)}.phrase-toggle{width:38px;height:38px;border:1px solid transparent;color:#90998a;border-radius:50%;background:transparent;display:grid;place-items:center;flex-shrink:0}.phrase-toggle:hover{border-color:var(--line);background:#fafaf5;color:var(--accent)}.phrase-toggle svg{width:16px;height:16px}.library-footer{display:flex;justify-content:space-between;gap:16px;margin-top:25px;color:#969b91;font-size:9px;letter-spacing:1px}.empty{padding:55px 20px;text-align:center;color:var(--muted);font-size:14px}.empty p{font-size:12px;margin-top:12px}.player{position:fixed;z-index:10;bottom:max(18px,env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);width:calc(100% - 56px);max-width:1100px;background:var(--dark);color:#f9f8f1;border-radius:17px;padding:20px 28px 15px;box-shadow:0 10px 45px #172b252a;border:1px solid #3c453f}.player-top{display:flex;justify-content:space-between;align-items:center;gap:15px}.now-label{display:flex;align-items:center;gap:8px;color:#a6b5a8;font-size:10px;letter-spacing:.3px}.live-dot{width:6px;height:6px;border-radius:50%;background:#b4c89a}.player.playing .live-dot{animation:pulse 1.8s infinite}#position{opacity:.65;font-variant-numeric:tabular-nums}.player-options{display:flex;align-items:center;gap:16px;flex-shrink:0}.player-main{display:flex;justify-content:space-between;align-items:center;gap:28px;margin:15px 0 14px}.now-playing{flex:1;min-width:0}.now-playing p{margin:0;line-height:1.5}.now-playing #current-en{font-size:18px;font-weight:500;letter-spacing:-.2px}.now-playing #current-zh{font-size:12px;color:#a8b4a7;margin-top:5px}.now-playing #current-zh.speaking{color:#e7c3a1}.now-playing #current-en.speaking{color:#f5dab4}.now-playing.zh-first{display:flex;flex-direction:column}.now-playing.zh-first #current-zh{order:-1;margin:0 0 5px;font-size:16px}.now-playing.zh-first #current-en{font-size:13px}.transport{display:flex;gap:17px;align-items:center}.icon-button{height:42px;width:42px;padding:10px;border:0;color:#d8e0d2;background:transparent;border-radius:50%;display:grid;place-items:center}.icon-button:hover{background:#3e4941}.icon-button svg{width:18px;height:18px}.play-button{border:0;border-radius:50%;width:52px;height:52px;background:#dfb580;color:#27382b;display:grid;place-items:center}.play-button:hover{background:#ebc391}.play-button svg{height:24px;width:24px}.progress-line{display:flex;align-items:center;gap:10px;color:#a0ad9e;font-size:9px;font-variant-numeric:tabular-nums}.progress-line>span:first-child{min-width:23px}.progress-line>span:last-child{min-width:67px;text-align:right}.progress-line input{flex:1;min-width:0;accent-color:#ddba86;height:14px;cursor:pointer}.toast{position:fixed;z-index:30;bottom:230px;left:50%;transform:translateX(-50%);background:#fffef9;color:var(--ink);box-shadow:0 4px 25px #27352a22;border:1px solid var(--line);border-radius:10px;padding:13px 20px;font-size:13px;max-width:calc(100% - 36px);text-align:center}.sr-only{position:absolute;clip:rect(0,0,0,0);width:1px;height:1px;overflow:hidden;white-space:nowrap}dialog{border:1px solid var(--line);border-radius:18px;background:var(--paper);color:var(--ink);padding:34px;max-width:450px;width:calc(100% - 32px);box-shadow:0 15px 80px #15231d40}dialog::backdrop{background:#1d2b2560;backdrop-filter:blur(3px)}dialog h2{font-size:24px;margin-bottom:25px}dialog p:not(.eyebrow){font-size:13px;color:var(--muted);line-height:1.9}dialog .dialog-done{margin-top:12px}.dialog-close{position:absolute;right:12px;top:12px;width:34px;height:34px;border:0;border-radius:50%;background:transparent;font-size:25px;color:var(--muted)}[hidden]{display:none!important}@keyframes pulse{50%{opacity:.35}}
@media(min-width:1500px){.page{padding-top:12px}.intro{padding-top:65px;padding-bottom:55px}.intro h1{font-size:48px}}
@media(max-width:850px){.page{padding:0 25px 265px}.topbar{height:82px}.brand-caption,.network-status{display:none}.top-actions{gap:3px}.intro{padding:35px 0}.intro h1{font-size:34px}.collection-note{display:none}.workspace{grid-template-columns:1fr;gap:25px;padding-top:20px}.sidebar{position:static}.sidebar>.eyebrow,.sidebar-note{display:none}#lessons{display:flex;gap:7px;overflow-x:auto;scrollbar-width:none;padding-bottom:3px}.lesson-button{white-space:nowrap;gap:13px;width:auto;min-width:max-content;margin:0;border:1px solid var(--line);padding:10px 13px}.lesson-button.active{border-color:#e5cbb7}.library-top h2{font-size:21px}.player{width:calc(100% - 28px);padding:18px 22px 14px}.now-playing #current-en{font-size:16px}}
@media(max-width:540px){.page{padding:0 18px 285px}.topbar{height:75px;gap:8px}.brand{font-size:26px;gap:8px}.brand-mark{width:30px;height:30px;font-size:29px}.top-actions .button{font-size:11px;padding:8px;gap:5px}.top-actions .button svg{width:15px;height:15px}.top-actions .quiet{font-size:10px}.intro{padding:31px 0 28px}.eyebrow{font-size:8px;letter-spacing:1.6px}.intro h1{font-size:32px;letter-spacing:-1.2px}.intro h1 span{display:block}.intro-description{font-size:11px;max-width:275px;line-height:1.9;margin-top:12px}.workspace{padding-top:16px;gap:23px}.lesson-button{font-size:11px;padding:8px 11px;min-height:39px}.lesson-button span:last-child{font-size:9px}.library-top{gap:12px}.library-top .eyebrow{font-size:8px}.library-top h2{font-size:19px}.list-tools{margin-top:14px}.phrase{gap:8px;padding:12px 0;min-height:89px}.phrase-main{gap:10px;padding-left:5px}.phrase-index{font-size:10px;min-width:19px}.phrase-en{font-size:14px;line-height:1.6}.phrase-zh{font-size:11px;line-height:1.7}.phrase-toggle{width:36px;height:40px}.library-footer{font-size:8px;line-height:1.7}.library-footer>span:last-child{display:none}.player{width:calc(100% - 20px);padding:13px 15px 12px;border-radius:15px;bottom:max(10px,env(safe-area-inset-bottom))}.player-top{gap:8px;align-items:flex-start}.now-label{font-size:9px;gap:5px;flex-wrap:wrap;max-width:80px;line-height:1.6}.now-label #position{width:100%;padding-left:11px}.player-options{gap:7px}.player-main{gap:12px;margin:13px 0 11px}.now-playing #current-en{font-size:13px;line-height:1.5}.now-playing #current-zh{font-size:10px;line-height:1.6}.now-playing.zh-first #current-zh{font-size:12px}.now-playing.zh-first #current-en{font-size:11px}.transport{gap:1px}.icon-button{height:32px;width:27px;padding:5px}.icon-button svg{width:15px;height:15px}.play-button{width:42px;height:42px;margin:0 4px;flex-shrink:0}.play-button svg{width:21px;height:21px}.progress-line{font-size:8px;gap:6px}.toast{bottom:225px;font-size:12px}.progress-line input{height:17px}}
.sidebar,.library{min-width:0}.library-top>div{min-width:0}#lessons{max-width:100%}
@media(max-width:850px){.workspace{grid-template-columns:minmax(0,1fr)}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* Leave room to bring even the final sentence to the top. */
.page{padding-bottom:max(260px,calc(100svh - 80px))}
.phrase,.removed-section{scroll-margin-top:12px}
.phrase-toggle{width:44px;height:44px}
.phrase.removed{opacity:1;background:#ecece6;box-shadow:none}
.phrase.removed .phrase-main{opacity:1;cursor:default;color:#92978e}
.phrase.removed .phrase-en,.phrase.removed .phrase-zh{color:#92978e}
.phrase.removed .phrase-toggle{width:auto;min-width:66px;border:1px solid #d3d6cc;border-radius:8px;display:flex;gap:4px;justify-content:center;font-size:11px;color:#596753;background:var(--paper)}
.removed-section{margin-top:30px}
.removed-heading{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 3px 8px}
.removed-heading h3{font-size:12px;font-weight:500;color:var(--muted);margin:0}
#removed-count{margin-left:5px;font-variant-numeric:tabular-nums}
#repeat-progress{color:#dfb580;white-space:nowrap}
#repeat-progress:empty{display:none}
.player-options{gap:10px}
.player-setting{position:relative;display:flex;flex-direction:column;align-items:center;gap:2px;min-width:0}
.player-setting>span{font-size:9px;color:#a6b5a8;letter-spacing:.5px}
.player-setting select{appearance:none;-webkit-appearance:none;border:0;border-radius:6px;background:var(--dark);color:#e2e9dc;font-size:12px;line-height:20px;min-height:32px;padding:4px 22px 4px 8px;cursor:pointer;text-align:center;text-align-last:center;min-width:0;width:100%}
.player-setting::after{content:"";position:absolute;pointer-events:none;right:9px;bottom:14px;width:5px;height:5px;border-right:1px solid #9ba797;border-bottom:1px solid #9ba797;transform:rotate(45deg)}
@media(max-width:850px){
  .player .now-playing,.player .progress-line{display:none}
  .player{display:grid;grid-template-columns:minmax(0,1fr);bottom:0;left:0;transform:none;width:100%;max-width:none;border-radius:22px 22px 0 0;padding:12px max(18px,env(safe-area-inset-left)) calc(12px + env(safe-area-inset-bottom));background:var(--dark);color:#f9f8f1;border:1px solid #3c453f;border-bottom:0;box-shadow:0 -5px 30px #172b252a}
  .player-top{display:contents}
  .now-label{grid-row:1;justify-content:center;max-width:none;flex-wrap:nowrap;font-size:10px;line-height:16px;gap:8px;color:#a6b5a8;letter-spacing:0;min-height:16px}
  .now-label #position{width:auto;padding-left:0;opacity:1}
  .live-dot{width:5px;height:5px;background:#a6b5a8}
  .player.playing .live-dot{background:#b4c89a}
  #repeat-progress{color:#dfb580;padding:0;flex-basis:auto}
  #repeat-progress:not(:empty)::before{content:"·";color:#7c8b7e;margin-right:8px}
  .player-main{grid-row:2;justify-content:center;margin:8px 0 12px;gap:0}
  .transport{gap:30px}
  .icon-button{width:44px;height:44px;padding:12px;color:#d8e0d2}
  .icon-button:hover{background:#3e4941}
  .icon-button svg{width:20px;height:20px}
  .play-button{width:52px;height:52px;margin:0;background:#dfb580;color:#27382b;box-shadow:none}
  .play-button:hover{background:#ebc391}
  .play-button svg{width:24px;height:24px}
  .player-options{grid-row:3;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;padding-top:10px;border-top:1px solid #465248;width:100%}
  .player-setting{gap:1px;padding:0 6px}
  .player-setting+.player-setting{border-left:1px solid #465248}
  .player-setting>span{color:#a6b5a8;font-size:9px;line-height:14px}
  .player-setting select{background:var(--dark);color:#e2e9dc;font-size:12px;font-weight:600;min-height:30px;padding:3px 16px 3px 0;line-height:24px}
  .player-setting::after{right:9px;bottom:13px;border-color:#9ba797}
  .toast{bottom:calc(190px + env(safe-area-inset-bottom))}
}
@media(max-width:540px){
  .phrase{gap:10px;min-height:89px}
  .phrase.removed .phrase-toggle{min-width:60px;font-size:10px}
}

.category-tabs{display:grid;gap:6px;padding-bottom:17px;margin-bottom:14px;border-bottom:1px solid var(--line)}
.category-button{display:flex;justify-content:space-between;align-items:center;gap:8px;border:1px solid transparent;border-radius:9px;padding:11px 12px;min-height:44px;background:transparent;color:var(--ink);font-size:12px;text-align:left;white-space:nowrap}
.category-button span:last-child{font-size:10px;font-weight:400;opacity:.65;font-variant-numeric:tabular-nums}
.category-button.active{background:var(--dark);color:#f9f8f1;font-weight:600}
.category-button:not(.active):hover{background:#ebe9e1}
@media(max-width:850px){.category-tabs{grid-template-columns:auto 1fr 1.3fr;gap:6px;margin-bottom:13px;padding-bottom:13px}.category-button{justify-content:center;padding:10px;gap:7px;font-size:12px}}
@media(max-width:360px){.category-button{font-size:11px;padding:9px 6px;gap:5px}.category-button span:last-child{font-size:9px}}
@media(min-width:851px){.sidebar{max-height:calc(100svh - 270px);overflow-y:auto;scrollbar-width:thin;scrollbar-color:#ccd1c4 transparent;overscroll-behavior:contain}}