:root{--app-bg:#f8f7f4;--app-surface:#fff;--app-ink:#2d2b2a;--app-muted:#8c8884;--app-border:#e4e2db;--app-accent:#2d6a4f;--app-soft:#e8f5ee;--subtitle-size:16px;color-scheme:light}.dark{--app-bg:#121111;--app-surface:#1c1b1a;--app-ink:#e8e6e1;--app-muted:#a39e98;--app-border:#333130;--app-soft:#203b2d;color-scheme:dark}body{background:var(--app-bg)!important;color:var(--app-ink)!important}[hidden]{display:none!important}button:disabled{cursor:not-allowed;opacity:.45}button,a,input,textarea,select{touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid #3b906a;outline-offset:3px}.app-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--app-border);background:var(--app-surface);color:var(--app-ink);border-radius:10px;padding:9px 13px;font-size:13px;line-height:1.4;cursor:pointer;transition:background .15s}.app-btn:hover{background:var(--app-soft)}.app-btn.primary,.app-btn[aria-pressed=true],.app-btn.active{background:var(--app-accent);color:white;border-color:var(--app-accent)}.app-btn.danger{color:#c14636}.app-chip{border:1px solid var(--app-border);border-radius:999px;padding:4px 9px;font-size:11px;color:var(--app-muted);display:inline-flex;align-items:center;gap:5px;background:var(--app-surface)}.app-chip.active{color:var(--app-accent);border-color:var(--app-accent)}.app-input{display:block;width:100%;border:1px solid var(--app-border);border-radius:10px;background:var(--app-bg);color:var(--app-ink);padding:11px 13px;font:inherit;font-size:14px;min-width:0}.app-field{display:block;font-size:13px;margin:14px 0}.app-field>span{display:block;color:var(--app-muted);margin-bottom:7px}.app-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.app-stack>*+*{margin-top:12px}.app-card{border:1px solid var(--app-border);border-radius:15px;padding:20px;background:var(--app-surface)}.app-muted{color:var(--app-muted);font-size:13px;line-height:1.8}.app-page{max-width:1100px;margin:auto;padding:32px 24px 90px}.app-page h1{font-size:25px;font-weight:650;margin:0 0 22px}.app-page h2{font-size:18px;font-weight:600;margin:24px 0 14px}.app-empty{padding:50px 20px;text-align:center;color:var(--app-muted);line-height:2}.app-notice{padding:12px 16px;background:#fff5d8;border:1px solid #e9d69c;border-radius:10px;font-size:13px;line-height:1.8;color:#755a15}.dark .app-notice{background:#352c17;color:#e4c978;border-color:#544324}.app-error{color:#bb3c32;font-size:13px;white-space:pre-wrap;line-height:1.8}.app-success{color:var(--app-accent);font-size:13px}.app-link{color:var(--app-accent);text-decoration:underline;text-underline-offset:3px}.app-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(235px,1fr));gap:16px}.app-stat strong{display:block;font-size:27px;margin-bottom:4px}.app-toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);max-width:90vw;border-radius:12px;background:#263e31;color:white;box-shadow:0 8px 28px #0003;padding:12px 20px;z-index:3000;font-size:13px;line-height:1.7}.app-modal{border:1px solid var(--app-border);border-radius:18px;background:var(--app-surface);color:var(--app-ink);padding:0;width:min(680px,calc(100vw - 28px));max-height:88dvh;box-shadow:0 25px 80px #0004}.app-modal::backdrop{background:#0007;backdrop-filter:blur(3px)}.app-modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--app-border);position:sticky;top:0;background:var(--app-surface);z-index:1}.app-modal-head h2{font-size:18px;font-weight:600}.app-modal-body{padding:18px 22px;line-height:1.8}.app-modal-foot{padding:14px 22px;border-top:1px solid var(--app-border);display:flex;justify-content:flex-end;gap:10px;position:sticky;bottom:0;background:var(--app-surface)}.app-modal .app-close{width:30px;height:30px;border-radius:50%;font-size:20px;line-height:1}.app-modal textarea{min-height:100px;resize:vertical}.app-setting{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0;border-bottom:1px solid var(--app-border);font-size:14px}.app-setting select{width:auto;max-width:230px}.app-setting input[type=checkbox]{width:19px;height:19px;accent-color:var(--app-accent)}.app-bottom-nav{display:none}.app-sync{position:fixed;bottom:8px;right:12px;z-index:80;font-size:11px;color:var(--app-muted);background:var(--app-surface);padding:3px 8px;border-radius:6px}.app-sync:empty{display:none}.app-toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:18px}.app-toolbar .app-input{width:auto;flex:1;min-width:160px}.app-term{display:inline;padding:1px 4px;margin:0 1px;border:0;background:#e3ecdf;color:#275e42;border-radius:4px;font:inherit;font-weight:600;cursor:pointer}.app-term.t-word{background:#fff0db;color:#9c5626}.app-term.t-phrase{background:#eae5fb;color:#61518b}.dark .app-term{background:#284b37;color:#a5d6b2}.dark .app-term.t-word{background:#4e3822;color:#e3b27e}.dark .app-term.t-phrase{background:#3d3454;color:#c1aceb}.app-term.masked{color:transparent!important;user-select:none;min-width:35px}.app-dict-def{padding:12px 0;border-bottom:1px solid var(--app-border)}.app-occurrence{display:block;padding:13px;margin:10px 0;background:var(--app-bg);border:1px solid var(--app-border);border-radius:10px}.app-occurrence:hover{border-color:var(--app-accent)}.app-occurrence p{margin:5px 0}.app-wordbook-panel{padding:15px;margin-bottom:18px;border:1px solid var(--app-border);border-radius:12px}.app-note{margin-top:8px;padding:8px 12px;background:var(--app-soft);border-radius:8px;color:var(--app-accent);font-size:13px;white-space:pre-wrap}.app-heatmap{display:flex;gap:3px;overflow:auto;padding:12px 0}.app-heat-column{display:flex;flex-direction:column;gap:3px}.app-heat-cell{width:13px;height:13px;flex:none;border-radius:3px;background:var(--app-border);border:1px solid #00000005}.app-heat-cell.level1{background:#b3d2b0}.app-heat-cell.level2{background:#6aa578}.app-heat-cell.level3{background:#2d6a4f}.app-recovery-code{font:19px/2 Consolas,monospace;word-break:break-all;background:var(--app-bg);padding:14px;border-radius:10px;user-select:all}.app-login{max-width:440px;margin:7vh auto;padding:20px}.app-login h1{font-size:29px;font-weight:700;margin-bottom:8px}.app-login form{margin-top:24px}.app-login .app-btn.primary{width:100%;padding:12px}.app-result{display:block;padding:18px 20px;border-bottom:1px solid var(--app-border)}.app-result:hover{background:var(--app-soft)}.app-result mark{background:#f8dc8f;color:#493514;border-radius:3px;padding:0 2px}.app-result .meta{display:flex;justify-content:space-between;margin-top:7px;color:var(--app-muted);font-size:12px}.app-sentence-card{padding:18px;margin-bottom:12px;background:var(--app-surface);border:1px solid var(--app-border);border-radius:12px}.app-sentence-card>p{margin-bottom:8px;line-height:1.8}.app-recording audio{width:100%;height:38px;margin-top:10px}.app-method-nav{display:flex;flex-direction:column;gap:6px;position:sticky;top:95px}.app-method-layout{display:grid;grid-template-columns:220px 1fr;gap:28px}.app-method-article h2{font-size:23px}.app-method-article p,.app-method-article li{line-height:2;margin:12px 0}.app-method-article h3{font-weight:650;font-size:16px;margin-top:25px}
/* 学习页：桌面双栏，手机使用独立模式和底部播放条。 */
.app-player-body{height:100dvh;overflow:hidden}.app-player-header{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 22px;border-bottom:1px solid var(--app-border);background:var(--app-bg)}.app-player-header h1{font-size:18px;font-weight:650}.app-player-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;height:calc(100dvh - 64px);padding:18px 22px;overflow:hidden}.app-player-left{display:flex;flex-direction:column;min-height:0;gap:10px;overflow-y:auto;scrollbar-width:thin}/* Keep the reference 16:9 frame at every width; scroll the column on short screens. */
.app-media{width:100%;aspect-ratio:16/9;flex:none;background:#111;border-radius:15px;position:relative;overflow:hidden}.app-media video{width:100%;height:100%;object-fit:contain}.app-media .app-big-play{position:absolute;inset:0;margin:auto;width:68px;height:68px;border-radius:50%;background:#ffffff2b;border:1px solid #ffffff60;color:white;font-size:34px;backdrop-filter:blur(8px)}.app-video-caption{position:absolute;bottom:12px;left:15px;right:15px;text-align:center;color:white;text-shadow:0 1px 3px black;font-size:15px;pointer-events:none}.app-video-caption span{display:inline-block;background:#0007;border-radius:4px;padding:3px 8px}.app-play-controls{background:var(--app-surface);border:1px solid var(--app-border);border-radius:13px;padding:6px 8px;flex:none}.app-progress-time{display:flex;justify-content:space-between;font-size:10px;line-height:1.2;color:var(--app-muted)}.app-progress{display:block;width:100%;accent-color:var(--app-accent);height:16px}.app-controls-row{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(0,1fr);gap:2px;align-items:stretch;margin-top:2px}.app-control{min-height:46px;min-width:0;width:100%;padding:3px 0;border-radius:8px;border:1px solid transparent;font-size:11px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:var(--app-muted);white-space:normal}.app-control span{max-width:100%;line-height:1.3}.app-control b{font-size:17px;font-weight:500;line-height:1}.app-control:hover,.app-control.active{background:var(--app-soft);color:var(--app-accent);border-color:var(--app-border)}.app-current-panel{flex:1;min-height:140px;border-radius:15px;border:1px solid var(--app-border);background:var(--app-surface);display:flex;flex-direction:column;overflow:auto}.app-current-bar{display:flex;align-items:center;gap:10px;padding:10px 14px;flex:none;font-size:12px;color:var(--app-muted);border-bottom:1px solid var(--app-border)}.app-current-content{padding:18px;display:flex;flex:1;flex-direction:column;justify-content:center;min-height:0;text-align:center}.app-current-en{font-size:clamp(18px,1.6vw,25px);font-weight:550;line-height:1.9}.app-current-cn{font-size:14px;color:var(--app-muted);line-height:1.9;margin-top:12px}.app-ipa{font:12px/1.8 Consolas,monospace;color:var(--app-muted);margin-bottom:8px}.app-dictation-input{min-height:110px;width:100%;flex:1;border:1px solid var(--app-border);border-radius:12px;background:var(--app-bg);color:var(--app-ink);font:17px/1.9 inherit;padding:12px;resize:vertical}.app-player-right{min-height:0;display:flex;flex-direction:column;background:var(--app-surface);border:1px solid var(--app-border);border-radius:15px;overflow:hidden}.app-mode-bar{display:flex;gap:4px;align-items:center;flex-wrap:wrap;padding:10px;border-bottom:1px solid var(--app-border)}.app-mode-bar .app-btn{font-size:12px;padding:7px 10px;border-radius:20px}.app-transcript-search{padding:10px 13px;border-bottom:1px solid var(--app-border)}.app-transcript{overflow:auto;min-height:0;flex:1;padding:10px;scroll-behavior:smooth}.app-line{padding:15px 13px;border:1px solid transparent;border-radius:12px;margin-bottom:9px;line-height:1.8;cursor:pointer}.app-line:hover{background:var(--app-bg)}.app-line.active{border-color:#a7cdb3;background:var(--app-soft)}.app-line-en{font-size:var(--subtitle-size);line-height:1.95}.app-line-cn{font-size:calc(var(--subtitle-size) - 2px);color:var(--app-muted);line-height:1.9;margin-top:5px}.app-line-footer{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--app-border);padding-top:9px;margin-top:11px;font-size:11px;color:var(--app-muted)}.app-line-actions{display:flex;gap:4px}.app-icon-btn{width:27px;height:27px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;border:1px solid var(--app-border);font-size:15px;background:var(--app-surface);color:var(--app-muted)}.app-icon-btn.active{background:var(--app-accent);color:white;border-color:var(--app-accent)}.app-reading-row{padding:16px 12px;border-bottom:1px solid var(--app-border)}.app-reading-row .row-head{display:flex;gap:10px;align-items:baseline}.app-reading-row .row-text{flex:1;font-size:var(--subtitle-size);line-height:2}.app-reading-row .translation{padding:12px 25px;color:var(--app-muted);font-size:14px;line-height:2}.app-reading-num{font-size:11px;color:var(--app-muted);width:20px;flex:none}.app-word-row{padding:12px;border:1px solid var(--app-border);border-radius:10px;margin:8px 0;background:var(--app-bg);width:100%;text-align:left;display:flex;align-items:center;gap:12px}.app-word-row .word{flex:1;font-size:16px}.app-word-filters{padding:12px;border-bottom:1px solid var(--app-border)}.app-diff-correct{color:var(--app-accent)}.app-diff-wrong,.app-diff-extra{color:#bc443c;text-decoration:line-through}.app-diff-missing{color:#a56819;background:#fff0c4;border-radius:4px;padding:1px 4px}.app-mobile-tabs{display:none}.app-recording-live{color:#b83b32;font-weight:600}.app-more{margin-left:auto}.app-word-view{display:flex;flex:1;min-height:0;flex-direction:column}.app-word-list{min-height:0;flex:1;overflow:auto;padding:10px}.app-content-unavailable{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;padding:30px;color:#e4e4e4;background:#202420;font-size:14px;line-height:1.8}
@media(max-width:767px){.app-page{padding:22px 16px 90px}.app-modal{max-height:92dvh}.app-modal-body{padding:16px}.app-setting{gap:10px}.app-setting select{max-width:170px}.app-method-layout{grid-template-columns:1fr}.app-method-nav{position:static;flex-direction:row;overflow:auto;white-space:nowrap;padding-bottom:8px}.app-bottom-nav{display:flex;position:fixed;bottom:0;left:0;right:0;justify-content:space-around;background:var(--app-surface);border-top:1px solid var(--app-border);height:60px;padding:7px 5px;z-index:100}.app-bottom-nav a{display:flex;align-items:center;justify-content:center;flex-direction:column;font-size:11px;gap:3px;color:var(--app-muted);min-width:50px}.app-bottom-nav a.active{color:var(--app-accent)}.app-sync{bottom:63px;max-width:80vw}.app-player-body .app-bottom-nav{display:none}.app-player-header{height:48px;padding:0 12px}.app-player-header h1{font-size:15px}.app-player-layout{display:flex;flex-direction:column;height:calc(100dvh - 48px);padding:0;gap:0}.app-player-left{display:contents}.app-media{order:0;width:100%;border-radius:0;aspect-ratio:16/9}.app-mobile-tabs{order:1;display:flex;align-items:center;background:var(--app-bg);padding:5px 8px;border-bottom:1px solid var(--app-border);gap:6px;flex:none}.app-mobile-tabs button{flex:1;border-radius:0;border:none;padding:9px 2px;font-size:13px;background:transparent;color:var(--app-muted)}.app-mobile-tabs button.active{color:var(--app-ink);border-bottom:2px solid var(--app-accent)}.app-player-right{order:2;flex:1;border:0;border-radius:0;min-height:0}.app-mode-bar{display:none}.app-current-panel{order:2;flex:1;border:0;border-radius:0;min-height:160px}.app-play-controls{order:3;border:0;border-radius:0;border-top:1px solid var(--app-border);padding:4px 8px calc(6px + env(safe-area-inset-bottom));background:var(--app-bg);width:100%;z-index:10}.app-controls-row{justify-content:space-between;margin-top:2px}.app-control{min-width:0;min-height:44px;padding:2px 1px;font-size:10px}.app-control b{font-size:16px}.app-control.desktop-only{display:none}.app-current-panel .app-current-content{justify-content:flex-start;overflow:auto;min-height:0}.app-current-panel .app-current-en{font-size:19px}.app-player-body .app-sync{bottom:5px;right:5px;font-size:9px;max-width:45vw}.app-player-header .desktop-only{display:none}.app-current-bar{gap:8px}.app-transcript{padding:6px}.app-line{padding:12px}.app-video-caption{font-size:12px;bottom:9px}.app-line-en{line-height:1.9}}
@media print{body{background:white!important;color:black!important;padding:0!important}.app-player-header,.app-play-controls,.app-mobile-tabs,.app-player-left,.app-mode-bar,.app-transcript-search,.app-line-actions,.app-modal,.app-bottom-nav,.app-sync,.app-line-footer{display:none!important}.app-player-body,.app-player-layout,.app-player-right,.app-transcript{display:block!important;overflow:visible!important;height:auto!important;max-height:none!important;border:0!important;padding:0!important}.app-line{break-inside:avoid;border-bottom:1px solid #ddd!important;background:white!important}.app-line-en,.app-line-cn{display:block!important;color:black!important}.app-term{background:transparent!important;color:black!important}.app-term.masked{color:black!important}.app-print-title{display:block!important;font-size:23px;margin-bottom:20px}.app-player-body{height:auto!important}}

.app-current-content{flex:1 0 auto;min-height:140px}.app-current-bar{position:sticky;top:0;z-index:2;background:var(--app-surface)}.app-transcript-search{flex-wrap:nowrap}.app-transcript-search .app-input{flex:1;min-width:0;width:auto}.app-controls-row{gap:2px}
@media(max-width:767px){.app-current-panel .app-current-content{flex:1 0 auto;min-height:180px;overflow:visible}.app-player-header{gap:6px}.app-player-header h1{white-space:nowrap;font-size:14px}.app-player-header .app-row{gap:6px}.app-player-header .app-btn{padding:7px 10px}}
.app-player-layout:fullscreen{height:100dvh;width:100vw;background:var(--app-bg)}

.app-plain-term{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}.app-plain-term:hover{color:var(--app-accent);text-decoration:underline;text-underline-offset:3px}


/* Player icons: quiet secondary tools and a clear central playback group. */
.app-controls-row .app-control{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:34px auto;align-content:center;justify-items:center;min-height:56px;padding:0;gap:0;transition:background .18s,color .18s}
.app-control .app-control-icon{display:inline-flex;align-items:center;justify-content:center;flex:none;position:relative;width:24px;height:24px;border:1px solid transparent;border-radius:50%;background:var(--app-bg);color:var(--app-ink);transition:background .18s,color .18s,transform .18s}
.app-player-symbol{display:block;width:18px;height:18px;flex:none}
.app-control .app-control-glyph{font:600 12px/1 'Inter',sans-serif;letter-spacing:-.04em}
#control-ipa .app-control-glyph{font-size:17px;font-weight:500}
.app-control .app-control-count{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font:600 9px/1 'Inter',sans-serif}
.app-control.app-control--transport{color:var(--app-ink);font-weight:600}
.app-control--transport .app-control-icon{width:26px;height:26px;background:var(--app-soft);color:var(--app-accent);border-color:#2d6a4f1f}
.app-control--transport .app-player-symbol{width:18px;height:18px;stroke-width:2}
.app-control.app-control--primary{color:var(--app-accent)}
.app-control--primary .app-control-icon{width:34px;height:auto;aspect-ratio:1;background:var(--app-accent);color:#fff;border-color:transparent;box-shadow:0 4px 12px #2d6a4f35}
.app-control--primary .app-player-symbol{width:18px;height:18px}
.app-control:hover .app-control-icon{transform:translateY(-1px)}
.app-control.active .app-control-icon{color:var(--app-accent);background:var(--app-soft)}
.app-media .app-big-play{display:flex;align-items:center;justify-content:center}
.app-media .app-big-play .app-player-symbol{width:30px;height:30px;transform:translateX(1px)}
.dark .app-control--transport .app-control-icon{color:#9dd6b8;border-color:#74c69d26}
.dark .app-control--primary .app-control-icon{background:#74c69d;color:#102b1d;box-shadow:0 4px 14px #0004}
.dark .app-control.app-control--primary,.dark .app-control.active .app-control-icon{color:#9dd6b8}
@media(max-width:767px){
  .app-controls-row .app-control{grid-template-rows:30px auto;min-height:50px;padding:0;gap:0}
  .app-controls-row .app-control.desktop-only{display:none}
  .app-control .app-control-icon{width:22px;height:22px}
  .app-control .app-player-symbol{width:16px;height:16px}
  .app-control .app-control-glyph{font-size:11px}
  #control-ipa .app-control-glyph{font-size:16px}
  .app-control--transport .app-control-icon{width:25px;height:25px}
  .app-control--primary .app-control-icon{width:30px;height:auto}
  .app-control--primary .app-player-symbol{width:17px;height:17px}
}
@media(prefers-reduced-motion:reduce){.app-control,.app-control .app-control-icon{transition:none}.app-control:hover .app-control-icon{transform:none}}


/* Keep seeking with the picture; the tools below retain their own row. */
.app-video-timeline{--seek-track:#ffffff50;--seek-played:#fff;--seek-thumb:#fff;position:absolute;z-index:3;inset:auto 0 0;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;padding:14px 12px 6px;color:#fff;background:linear-gradient(transparent,#000a);font-size:11px;line-height:1;font-variant-numeric:tabular-nums}
.app-video-timeline>span{text-shadow:0 1px 3px #0008;white-space:nowrap;pointer-events:none}
.app-video-timeline .app-progress{-webkit-appearance:none;appearance:none;display:block;width:100%;height:24px;margin:0;background:transparent;cursor:pointer;min-width:0;touch-action:pan-y}
.app-video-timeline .app-progress::-webkit-slider-runnable-track{height:3px;border-radius:999px;background:linear-gradient(to right,var(--seek-played) 0 var(--seek-fill,0%),var(--seek-track) var(--seek-fill,0%) 100%)}
.app-video-timeline .app-progress::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:10px;height:10px;margin-top:-3.5px;border:0;border-radius:50%;background:var(--seek-thumb);box-shadow:0 1px 4px #0005}
.app-video-timeline .app-progress::-moz-range-track{height:3px;border-radius:999px;background:var(--seek-track)}
.app-video-timeline .app-progress::-moz-range-progress{height:3px;border-radius:999px;background:var(--seek-played)}
.app-video-timeline .app-progress::-moz-range-thumb{width:10px;height:10px;border:0;border-radius:50%;background:var(--seek-thumb);box-shadow:0 1px 4px #0005}
.app-video-timeline .app-progress:focus-visible{outline:2px solid var(--seek-played);outline-offset:1px;border-radius:5px}
.app-play-controls>.app-controls-row{margin-top:0}
#video-module .app-video-caption{bottom:52px;z-index:2}
.app-video-timeline.is-detached{--seek-track:var(--app-border);--seek-played:var(--app-accent);--seek-thumb:var(--app-accent);position:static;padding:0 2px 4px;color:var(--app-muted);background:none}
.app-video-timeline.is-detached>span{text-shadow:none}
@media(max-width:767px){.app-video-timeline{gap:8px;padding:14px 10px 6px;font-size:10px}#video-module .app-video-caption{bottom:48px}}


/* Clearer control labels, with a little breathing room below each icon. */
.app-play-controls{container-type:inline-size}
.app-play-controls>.app-controls-row{column-gap:0}
.app-controls-row .app-control{row-gap:5px}
.app-control .app-control-label{font-size:12px;line-height:1.2;font-weight:500}
.app-control--transport .app-control-label{font-weight:600}
@container(max-width:650px){.app-control .app-control-label{font-size:11px}}
@container(max-width:550px){.app-control .app-control-label{min-height:2.4em}}
@media(max-width:767px){.app-controls-row .app-control{row-gap:4px}.app-control .app-control-label{font-size:10px}}


/* Compact paired catalog filters; accent selection remains multi-select. */
.app-filter-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;align-items:start}
.app-filter-field{display:block;min-width:0}
.app-filter-label{display:block;margin-bottom:8px;font-size:12px;font-weight:500;line-height:1.4;color:var(--app-muted)}
.app-filter-dropdown{min-width:0}
.app-filter-select{display:block;width:100%;min-width:0;height:36px;box-sizing:border-box;appearance:none;list-style:none;cursor:pointer;border:1px solid var(--app-border);border-radius:10px;background-color:var(--app-surface);color:var(--app-ink);padding:8px 27px 8px 10px;font:12px/18px 'Inter','Noto Sans SC',sans-serif;text-align:left;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238c8884' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 9px center}
.app-filter-select::-webkit-details-marker{display:none}
.app-filter-select>span{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.app-filter-select.is-selected{color:var(--app-accent);border-color:var(--app-accent)}
.app-filter-options{position:fixed;inset:auto;z-index:1100;width:168px;min-width:0;max-width:calc(100vw - 16px);box-sizing:border-box;max-height:220px;overflow-y:auto;overscroll-behavior:contain;margin:0;padding:5px;border:1px solid var(--app-border);border-radius:10px;background:var(--app-surface);color:var(--app-ink);box-shadow:0 8px 24px #0002;scrollbar-width:thin}
.app-filter-choice{display:flex;align-items:center;gap:8px;padding:7px 8px;border-radius:6px;color:var(--app-ink);font-size:12px;line-height:1.5;cursor:pointer}
.app-filter-choice:hover{background:var(--app-soft)}
.app-filter-choice input{width:14px;height:14px;flex:none;margin:0;accent-color:var(--app-accent)}
.app-filter-choice span{white-space:nowrap}

/* Four complete topic rows: 4 × 34px buttons + 3 × 8px gaps. */
.app-topic-grid{grid-auto-rows:34px;row-gap:8px;max-height:160px;align-content:start}


/* Small, crisp difficulty stars with a warmer selected state. */
.app-difficulty-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}
.app-difficulty-heading .app-filter-label{margin:0}
.app-difficulty-value{font-size:11px;line-height:1.4;color:var(--app-muted);font-variant-numeric:tabular-nums}
.app-difficulty-value.is-active{color:#a3682d}
.app-difficulty-stars{display:flex;align-items:center;gap:6px}
.app-difficulty-star{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;flex:none;padding:0;border:1px solid #e3ded5;border-radius:8px;background:#faf8f4;color:#817565;cursor:pointer;transition:background .15s,border-color .15s,color .15s}
.app-difficulty-star svg{display:block;width:18px;height:18px;fill:transparent;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.app-difficulty-star:hover{color:#a46a2c;border-color:#c7a57c;background:#fcf4e8}
.app-difficulty-star.fill{color:#ad6c29;border-color:#d1ac7d;background:#f9ecd9}
.app-difficulty-star.fill svg{fill:currentColor;stroke-width:1.2}
.dark .app-difficulty-star{color:#b6aa99;border-color:#494135;background:#29251f}
.dark .app-difficulty-star:hover{color:#edbd7e;border-color:#a17a46;background:#3b2d1c}
.dark .app-difficulty-star.fill{color:#edba72;border-color:#a27b45;background:#47341e}
.dark .app-difficulty-value.is-active{color:#e8b575}
@media(max-width:767px){.app-difficulty-star{width:34px;height:34px}}
@media(prefers-reduced-motion:reduce){.app-difficulty-star{transition:none}}

/* Use one text style for every desktop header navigation link. */
header nav .nav-link{font-family:'Inter','Noto Sans SC',sans-serif;font-size:14px;font-weight:500;line-height:20px;letter-spacing:0;color:#63605e}
header nav .nav-link:hover{color:var(--app-ink)}
header nav .nav-link.active{color:var(--app-accent)}
header nav .nav-link.active::after{background:currentColor}
.dark header nav .nav-link{color:var(--app-muted)}
.dark header nav .nav-link:hover{color:var(--app-ink)}
.dark header nav .nav-link.active{color:#74c69d}
.dark header nav .nav-link.active::after{background:currentColor}
.site-beian{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 18px;padding:20px 16px 28px;font-size:12px;line-height:1.6;color:var(--app-muted);text-align:center}.site-beian a{color:inherit}.site-beian a:hover{color:var(--app-ink);text-decoration:underline}.app-player-body .site-beian{display:none}@media(max-width:767px){.site-beian{padding-bottom:84px}}@media print{.site-beian{display:none}}
.app-invite{display:flex;justify-content:space-between;align-items:center;gap:10px 16px;flex-wrap:wrap;padding:14px 0;border-bottom:1px solid var(--app-border)}.app-invite:last-child{border-bottom:0}.app-invite-code{font:600 17px/1.6 Consolas,'SFMono-Regular',monospace;letter-spacing:.06em;margin-right:8px;user-select:all}.app-invite .app-chip{vertical-align:middle}button.app-chip{cursor:pointer}