/* Content-first study surface: original implementation inspired by modern learning catalogues. */
.library-active{--bg:#f7f9fc;--surface:#fff;--surface-2:#f2f5fa;--line:#dfe6ef;--line-2:#c5d0df;--ink:#1b2438;--ink-2:#5b6b83;--ink-3:#8a98aa}
.library-active .topbar{background:rgba(247,249,252,.92)}
.library-active .tabbar{background:rgba(255,255,255,.94)}
.library-active .lib-page{color:var(--ink)}
.library-active .lib-hero-main{background:linear-gradient(132deg,#202a5c 0%,#2f69ba 57%,#73b9e8 100%)}
.library-active .lib-skill-hero .lib-hero-main{background:linear-gradient(132deg,color-mix(in srgb,var(--skill-accent) 70%,#202a5c),color-mix(in srgb,var(--skill-accent) 52%,#2f69ba) 57%,#73b9e8 100%)}
.lib-skill-hero .lib-skill-hero-meta{display:flex;gap:9px;flex-wrap:wrap;margin-top:15px}
.lib-skill-hero .lib-skill-hero-meta span{padding:7px 10px;border:1px solid rgba(255,255,255,.24);border-radius:999px;background:rgba(255,255,255,.12);color:rgba(255,255,255,.78);font-size:11px}
.lib-skill-hero .lib-skill-hero-meta b{margin-right:3px;color:#fff;font-size:14px}
.library-active .lib-hero-main:focus-within,.library-active .lib-card:focus-within{outline:3px solid rgba(44,129,232,.3);outline-offset:3px}
.lib-page{max-width:1280px}
.lib-page button,.lib-page input{outline:none}
.lib-page button:focus-visible,.lib-page input:focus-visible{box-shadow:0 0 0 3px rgba(48,125,229,.22)}
.lib-hero-main{display:flex;flex-direction:column;justify-content:center}
.lib-hero-main .lib-hero-actions .btn{transition:transform .2s ease,box-shadow .2s ease}
.lib-hero-main .lib-hero-actions .btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(20,61,120,.16)}
.lib-goal{border-color:#d6e3f0}
.lib-goal .goal-big{font-variant-numeric:tabular-nums}
.lib-goal .goal-track i{background:linear-gradient(90deg,#276fd8,#6bc8ed)}
.lib-hero-note{display:flex;align-items:center;gap:8px;margin-top:17px;color:rgba(255,255,255,.74);font-size:12px}
.lib-hero-note i{width:8px;height:8px;border-radius:99px;background:#ffd27e;box-shadow:0 0 0 5px rgba(255,210,126,.15)}
.lib-toolbar{position:sticky;top:58px;z-index:12;padding:10px 0 8px;background:color-mix(in srgb,var(--bg) 94%,transparent)}
.lib-toolbar:after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent);opacity:.7}
.lib-search{min-width:280px;border-radius:15px;transition:border-color .2s ease,box-shadow .2s ease}
.lib-search:focus-within{border-color:#7fb5ed;box-shadow:0 0 0 4px rgba(49,128,232,.1),var(--e1)}
.lib-search input{min-width:0}
.lib-filter button{background:rgba(255,255,255,.75)}
.lib-filter button.on{background:#eaf3ff;border-color:#78b1ed;color:#2069c2}
.lib-section{scroll-margin-top:132px}
.lib-section-head{align-items:center}
.lib-section-head h2{letter-spacing:-.03em}
.lib-section-head p{max-width:520px}
.lib-section-head button{border-radius:99px;padding:8px 11px;transition:background .2s ease}
.lib-section-head button:hover{background:#eaf3ff}
.lib-rail{padding-bottom:16px}
.lib-card{cursor:pointer;min-height:280px}
.lib-card:active{transform:translateY(-1px) scale(.995)}
.lib-card.is-done{border-color:#a7dbbb}
.lib-card.is-done .lib-cover:before{content:"✓ 已完成";position:absolute;z-index:3;right:11px;bottom:11px;padding:5px 8px;border-radius:8px;background:rgba(13,83,50,.88);font-size:10px;font-weight:900;color:#fff}
.lib-cover.listen{background:linear-gradient(135deg,#2168bd,#76bde7)}
.lib-cover .lib-cover-icon{font-size:31px}
.lib-cover .lib-cover-title{max-width:78%}
.lib-card-body{min-height:135px;display:flex;flex-direction:column}
.lib-card-foot{margin-top:auto;padding-top:10px}
.lib-card-foot button{padding:4px 0}
.lib-card-foot button:hover{text-decoration:underline}
.lib-cover .lib-tag{letter-spacing:.08em}
.lib-count-badge{display:inline-flex;align-items:center;gap:5px;height:26px;padding:0 10px;border-radius:99px;background:#edf4ff;color:#3d6ba0;font-size:11px;font-weight:850}
.lib-count-badge i{width:6px;height:6px;border-radius:50%;background:#4c9cf0}
.lib-list{align-items:stretch}
.lib-list .lib-card{min-width:0}
.lib-list .lib-cover{min-height:118px}
.lib-list .lib-card-body{min-height:142px}
.lib-index{padding-top:8px}
.lib-more{display:flex;justify-content:center;margin:18px 0 30px}
.lib-more .btn{min-width:170px}
.lib-empty{padding:50px 22px}
.lib-empty .et{font-size:28px;font-weight:850;color:var(--ink)}
.lib-empty .es{margin-top:8px}
.lib-session-intro{max-width:760px;margin:0 auto}
.lib-session-intro .lib-session-kicker{font-size:11px;font-weight:900;letter-spacing:.13em;text-transform:uppercase;color:var(--brand)}
.lib-session-intro .lib-session-tags{display:flex;gap:7px;flex-wrap:wrap;margin:12px 0}
.lib-session-shell{max-width:980px;margin:0 auto}
.lib-session-panel{padding:18px;border:1px solid var(--line);border-radius:20px;background:var(--surface);box-shadow:var(--e1)}
.lib-session-panel + .lib-session-panel{margin-top:12px}
.lib-session-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:13px}
.lib-session-toolbar .small{font-size:11px}
.lib-audio-wrap{padding:15px;border-radius:18px;background:linear-gradient(135deg,#edf5ff,#f8fbff);border:1px solid #d7e7f6}
.lib-audio-wrap audio{width:100%;height:42px}
.lib-audio-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.lib-audio-actions .btn{min-height:36px;font-size:12px}
.lib-transcript[hidden]{display:none}
.lib-transcript{max-height:260px;overflow:auto}
.lib-q-list{display:grid;gap:12px}
.lib-q-card{padding:15px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}
.lib-q-card.answered{border-color:#a9caee}
.lib-q-card.correct{border-color:#a7dbbb;background:linear-gradient(180deg,var(--surface),#f2fbf5)}
.lib-q-card.incorrect{border-color:#efb9b6;background:linear-gradient(180deg,var(--surface),#fff6f5)}
.lib-q-card .lib-question-label{align-items:flex-start}
.lib-q-card .lib-question-label b{flex:0 0 auto}
.lib-q-card textarea,.lib-q-card input{width:100%;min-height:44px;padding:10px 12px;border:1px solid var(--line-2);border-radius:11px;background:var(--surface);font-size:15px}
.lib-q-card textarea{min-height:92px;resize:vertical}
.lib-q-card select{width:100%;height:44px;padding:0 11px;border:1px solid var(--line-2);border-radius:11px;background:var(--surface)}
.lib-q-card .lib-q-options{margin-top:10px}
.lib-q-card .lib-q-options button{background:var(--surface)}
.lib-q-card .lib-q-options button:hover{border-color:#78b1ed}
.lib-q-card .lib-q-options button.on{background:#eaf3ff;border-color:#65a3e8;color:#1e67bd}
.lib-q-status{display:flex;align-items:center;gap:8px;margin-top:11px;font-size:12px;font-weight:800}
.lib-q-status.good{color:var(--ok)}
.lib-q-status.bad{color:var(--err)}
.lib-q-status .answer{font-weight:600;color:var(--ink-2)}
.lib-reading-layout{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(330px,.95fr);gap:14px;align-items:start}
.lib-reading-passage{max-height:calc(100svh - 200px);overflow:auto;position:sticky;top:0}
.lib-reading-passage h3{font-family:var(--font-en);font-size:21px;line-height:1.4;margin-bottom:12px}
.lib-reading-passage p{font-family:var(--font-en);font-size:16px;line-height:1.9;margin:0 0 14px}
.lib-reading-passage p[data-p]{padding:10px 11px;border-radius:11px;transition:background .2s ease}
.lib-reading-passage p[data-p]:hover{background:#f0f6ff;color:#183049}
.lib-reading-questions{display:grid;gap:11px}
.lib-reading-questions .lib-q-card{padding:13px}
.lib-par-ref{display:inline-flex;margin-left:6px;padding:2px 6px;border-radius:5px;background:#edf4ff;color:#3d6ba0;font-size:10px;font-weight:800}
.lib-writing-layout{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:14px;align-items:start}
.lib-writing-prompt{font-size:17px}
.lib-writing-editor{min-height:330px;width:100%;padding:16px;border:1px solid var(--line-2);border-radius:16px;background:var(--surface);font-family:var(--font-en);font-size:16px;line-height:1.85;resize:vertical}
.lib-writing-editor:focus{border-color:#71aae2;box-shadow:0 0 0 4px rgba(49,128,232,.1)}
.lib-writing-count{display:flex;justify-content:space-between;gap:8px;margin-top:8px;font-size:12px;color:var(--ink-3)}
.lib-writing-count b{color:var(--ink)}
.lib-writing-check{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:11px}
.lib-writing-check label{display:flex;gap:8px;align-items:flex-start;padding:10px;border-radius:11px;background:var(--surface-2);font-size:12px;color:var(--ink-2)}
.lib-writing-check input{accent-color:var(--write);margin-top:3px}
.lib-writing-report{display:grid;gap:7px;margin-top:12px}
.lib-report-row{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:9px 11px;border-radius:10px;background:var(--surface-2);font-size:12px}
.lib-report-row b{font-variant-numeric:tabular-nums}
.lib-speaking-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(250px,.62fr);gap:14px;align-items:start}
.lib-speak-prompt{min-height:270px;display:flex;flex-direction:column;justify-content:center}
.lib-speak-prompt .question{max-width:650px;margin-left:auto;margin-right:auto}
.lib-speak-points{display:grid;gap:8px;margin-top:18px;text-align:left}
.lib-speak-points li{list-style:none;padding:9px 11px;border-radius:10px;background:rgba(255,255,255,.65);font-family:var(--font-en);font-size:14px}
.lib-rec-card{padding:16px;border:1px solid var(--line);border-radius:18px;background:var(--surface)}
.lib-rec-state{display:flex;align-items:center;gap:9px;padding:11px 12px;border-radius:12px;background:var(--surface-2);font-size:12px;color:var(--ink-2)}
.lib-rec-dot{width:10px;height:10px;border-radius:50%;background:var(--line-2)}
.lib-rec-dot.live{background:#e45353;box-shadow:0 0 0 6px rgba(228,83,83,.12);animation:libPulse 1.4s infinite}
@keyframes libPulse{50%{transform:scale(.65);opacity:.65}}
.lib-rec-actions{display:grid;gap:8px;margin-top:12px}
.lib-rec-actions .btn{width:100%}
.lib-rec-card audio{width:100%;margin-top:12px}
.lib-vocab-layout{max-width:720px;margin:0 auto}
.lib-flash{cursor:pointer;user-select:none;transition:transform .25s ease,box-shadow .25s ease}
.lib-flash:hover{transform:translateY(-3px);box-shadow:var(--e2)}
.lib-flash.revealed{background:radial-gradient(circle at 50% 0%,var(--vocab-soft),var(--surface) 62%)}
.lib-flash .word{color:var(--ink)}
.lib-flash .phonetic{margin-top:8px;color:var(--vocab);font-size:13px;font-family:var(--font-en)}
.lib-flash .meaning{font-weight:750}
.lib-flash .example{max-width:520px;margin:14px auto 0;padding:11px 13px;border-radius:12px;background:rgba(255,255,255,.52);font-family:var(--font-en);font-size:15px;line-height:1.65;color:var(--ink-2)}
.lib-vocab-actions{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;margin-top:12px}
.lib-vocab-actions .btn{min-height:50px}
.lib-vocab-actions .btn:first-child{color:var(--err)}
.lib-vocab-actions .btn:nth-child(2){color:var(--warn)}
.lib-vocab-actions .btn:nth-child(3){color:var(--ok)}
.lib-session-footer-note{margin-top:10px;text-align:center;color:var(--ink-3);font-size:11px}
.lib-result-note{display:flex;align-items:center;gap:8px;justify-content:center;margin-top:12px;color:var(--ok);font-weight:800;font-size:12px}
.lib-result-note:before{content:"✓";display:grid;place-items:center;width:20px;height:20px;border-radius:50%;background:var(--ok-soft)}
@media (max-width:899px){
  .lib-toolbar{top:58px;margin-left:-14px;margin-right:-14px;padding-left:14px;padding-right:14px}
  .lib-search{min-width:0;flex:1 1 100%}
  .lib-reading-layout,.lib-writing-layout,.lib-speaking-layout{display:block}
  .lib-reading-passage{position:static;max-height:none;margin-bottom:12px}
  .lib-writing-prompt{font-size:16px}
  .lib-writing-editor{min-height:280px;margin-top:12px}
  .lib-writing-check{grid-template-columns:1fr}
  .lib-speak-prompt{min-height:240px}
  .lib-rec-card{margin-top:12px}
  .lib-vocab-actions{grid-template-columns:1fr}
  .lib-session-panel{padding:14px;border-radius:17px}
  .lib-q-card{padding:13px}
}
@media (prefers-reduced-motion:reduce){
  .lib-rec-dot.live{animation:none}
  .lib-card,.lib-flash,.lib-hero-main .lib-hero-actions .btn{transition:none}
}

/* Catalogue pass: keep the source-inspired shelves, but make the whole library
   legible at a glance and make the daily 480-minute loop the primary action. */
.library-active .lib-page{max-width:1240px}
.library-active .lib-hero{margin-bottom:15px}
.library-active .lib-hero-main{min-height:206px;padding:25px 27px;border-radius:24px}
.library-active .lib-hero h1{font-size:30px}
.library-active .lib-hero-actions{margin-top:17px}
.library-active .lib-goal{padding:19px;border-radius:24px}
.library-active .lib-stats{margin-bottom:16px}
.lib-stat{position:relative;overflow:hidden}
.lib-stat:after{content:"";position:absolute;right:-22px;bottom:-30px;width:76px;height:76px;border:13px solid color-mix(in srgb,var(--lib-accent) 17%,transparent);border-radius:50%}
.lib-stat small{display:block;margin-top:5px;color:var(--ink-3);font-size:10px;font-weight:700}
.lib-catalog-card{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:0 0 16px;padding:18px 20px;border:1px solid #cfe0f3;border-radius:20px;background:linear-gradient(110deg,#eef6ff,#fff 72%);box-shadow:var(--e1)}
.lib-catalog-card h2{margin-top:4px;font-size:19px;letter-spacing:-.03em}
.lib-catalog-card p{max-width:690px;margin-top:5px;color:var(--ink-2);font-size:12px;line-height:1.6}
.lib-catalog-card .btn{flex:0 0 auto;min-height:40px;white-space:nowrap}
.lib-duration{display:flex;gap:7px;flex-wrap:wrap;margin-top:8px}
.lib-duration button{padding:7px 10px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.75);color:var(--ink-2);font-size:11px;font-weight:800;white-space:nowrap}
.lib-duration button:hover{border-color:#78b1ed;color:#2069c2}
.lib-duration button.on{border-color:#78b1ed;background:#eaf3ff;color:#2069c2}
.lib-card-meta{display:flex;align-items:center;gap:5px;margin-top:9px;color:var(--ink-3);font-size:10px;white-space:nowrap}
.lib-card-open{margin-left:auto;color:var(--brand);font-weight:800;opacity:.78}
.lib-status-dot{width:6px;height:6px;border-radius:50%;background:#bdc8d7;box-shadow:0 0 0 3px rgba(189,200,215,.16)}
.lib-status-dot.done{background:#25a76d;box-shadow:0 0 0 3px rgba(37,167,109,.13)}
.lib-card.is-done .lib-card-meta{color:#32825f}
.lib-index-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;padding:4px 1px 18px}
.lib-index-grid .lib-card{min-width:0}
.lib-result-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:0 0 10px}
.lib-result-strip>div{display:flex;align-items:baseline;gap:7px;padding:12px 14px;border:1px solid var(--line);border-radius:15px;background:var(--surface);box-shadow:var(--e1)}
.lib-result-strip b{font-size:21px;letter-spacing:-.05em;color:var(--ink)}
.lib-result-strip span{font-size:11px;color:var(--ink-3)}
.lib-hero-index .lib-hero-main{min-height:164px}
.lib-session-impact{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:13px;padding:11px 13px;border:1px solid #cfe3fa;border-radius:14px;background:linear-gradient(100deg,#eff7ff,#f9fcff);color:#376286;font-size:11px}
.lib-session-impact strong{color:#1968bb;font-size:12px}
.lib-session-impact small{color:#72879e}
.library-active .lib-session-intro{padding-bottom:13px}
.library-active .lib-session-intro h2{font-size:23px}
:root[data-theme="dark"] .lib-catalog-card,:root[data-theme="dark"] .lib-session-impact{background:linear-gradient(110deg,#182d46,#17253a);border-color:#294866}
:root[data-theme="dark"] .lib-duration button{background:#17263a}
:root[data-theme="dark"] .lib-result-strip>div{background:#162438}
@media (prefers-color-scheme:dark){
  :root[data-theme="auto"] .lib-catalog-card,:root[data-theme="auto"] .lib-session-impact{background:linear-gradient(110deg,#182d46,#17253a);border-color:#294866}
  :root[data-theme="auto"] .lib-duration button{background:#17263a}
  :root[data-theme="auto"] .lib-result-strip>div{background:#162438}
}
@media (max-width:899px){
  .library-active .lib-hero-main{min-height:0;padding:22px;border-radius:21px}
  .library-active .lib-hero h1{font-size:27px}
  .library-active .lib-goal{padding:17px;border-radius:21px}
  .lib-catalog-card{display:block;padding:16px;border-radius:18px}
  .lib-catalog-card .btn{width:100%;margin-top:13px}
  .lib-index-grid{grid-template-columns:1fr;gap:10px}
  .lib-result-strip{gap:7px}
  .lib-result-strip>div{display:block;padding:10px 11px}
  .lib-result-strip b{display:block;font-size:19px}
  .lib-result-strip span{display:block;margin-top:3px;font-size:10px}
  .lib-card-meta{font-size:10px}
  .lib-session-impact{align-items:flex-start;flex-direction:column;gap:3px}
}

/* v4 experience pass: make the catalogue feel like a real learning home,
   while keeping the existing direct-study engine and offline-friendly shell. */
.library-active{background:#f4f6fb}
.library-active main{background:transparent}
.library-active .lib-page{max-width:1360px;padding-bottom:80px}
.library-active .lib-hero{gap:16px;margin-bottom:18px}
.library-active .lib-hero-main{position:relative;overflow:hidden;min-height:244px;padding:31px 34px;border-radius:28px;box-shadow:0 18px 44px rgba(38,82,143,.16)}
.library-active .lib-hero-main:after{content:"";position:absolute;right:-70px;bottom:-116px;width:310px;height:310px;border:1px solid rgba(255,255,255,.3);border-radius:50%;box-shadow:0 0 0 28px rgba(255,255,255,.07),0 0 0 56px rgba(255,255,255,.055),0 0 0 84px rgba(255,255,255,.04);pointer-events:none}
.library-active .lib-hero-main>*{position:relative;z-index:1}
.library-active .lib-hero h1{max-width:560px;font-size:35px;letter-spacing:-.055em}
.library-active .lib-hero-main p{max-width:610px;font-size:14px;line-height:1.75}
.library-active .lib-hero-actions{position:relative;z-index:2;display:flex;gap:9px;flex-wrap:wrap}
.library-active .lib-hero-actions .btn{min-height:43px;padding-inline:16px}
.library-active .lib-hero-actions .btn.secondary{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.34);color:#fff}
.library-active .lib-goal{position:relative;overflow:hidden;padding:23px 24px;border-radius:28px;background:linear-gradient(155deg,#fff 0%,#f5f8ff 100%);border:1px solid #d9e4f2;box-shadow:0 18px 44px rgba(43,75,120,.1)}
.library-active .lib-goal:before{content:"";position:absolute;top:-44px;right:-42px;width:145px;height:145px;border:18px solid rgba(54,133,222,.07);border-radius:50%}
.library-active .lib-goal>*{position:relative;z-index:1}
.library-active .lib-goal .goal-big{font-size:42px;letter-spacing:-.07em}
.library-active .lib-goal .goal-big small{font-size:13px;letter-spacing:0}
.library-active .lib-goal-marks{display:flex;justify-content:space-between;gap:5px;margin-top:9px}
.lib-goal-mark{display:flex;align-items:center;gap:4px;color:var(--ink-3);font-size:10px}
.lib-goal-mark i{width:7px;height:7px;border-radius:50%;background:#d2dce8;box-shadow:0 0 0 3px rgba(210,220,232,.3)}
.lib-goal-mark.on{color:#2d79c9;font-weight:800}.lib-goal-mark.on i{background:#3d9bea;box-shadow:0 0 0 3px rgba(61,155,234,.15)}
.library-active .lib-stats{grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin-bottom:20px}
.library-active .lib-stat{min-height:100px;padding:16px;border-radius:19px;background:rgba(255,255,255,.82);border:1px solid #e0e7f1;box-shadow:0 7px 22px rgba(42,68,104,.055)}
.library-active .lib-stat b{font-size:25px;letter-spacing:-.06em}.library-active .lib-stat span{font-size:11px;font-weight:800}.library-active .lib-stat small{font-size:10px}
.lib-tools-section{margin:0 0 20px;padding:22px 21px 20px;border:1px solid #dfe7f1;border-radius:24px;background:rgba(255,255,255,.7);box-shadow:0 8px 24px rgba(42,68,104,.05)}
.lib-tools-section .lib-section-head{margin:0 0 15px}
.lib-tool-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.lib-tool{position:relative;display:grid;grid-template-columns:42px minmax(0,1fr) auto;grid-template-rows:auto auto;column-gap:11px;align-items:center;min-height:83px;padding:13px 14px;border:1px solid #e0e7f1;border-radius:17px;background:#fff;text-align:left;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;overflow:hidden}
.lib-tool:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--tool-accent);opacity:.9}
.lib-tool:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--tool-accent) 35%,#dfe7f1);box-shadow:0 12px 28px color-mix(in srgb,var(--tool-accent) 14%,transparent)}
.lib-tool:focus-visible{outline:3px solid color-mix(in srgb,var(--tool-accent) 25%,transparent);outline-offset:2px}
.lib-tool-icon{grid-row:1 / span 2;display:grid;place-items:center;width:42px;height:42px;border-radius:14px;background:color-mix(in srgb,var(--tool-accent) 12%,#fff);color:var(--tool-accent);font-size:23px;font-weight:900}
.lib-tool-copy{min-width:0}.lib-tool-copy b{display:block;color:#1f2940;font-size:13px;letter-spacing:-.02em}.lib-tool-copy small{display:block;margin-top:4px;color:#78879b;font-size:10px;line-height:1.35;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lib-tool-time{grid-column:2;color:#94a0b1;font-size:10px;margin-top:5px}.lib-tool-arrow{grid-column:3;grid-row:1 / span 2;color:var(--tool-accent);font-size:18px;font-weight:900}
.lib-route-card{margin:0 0 20px;padding:22px 21px;border:1px solid #dfe7f1;border-radius:24px;background:linear-gradient(125deg,#fff 0%,#f5f8ff 70%,#eef6ff 100%);box-shadow:0 8px 24px rgba(42,68,104,.05)}
.lib-route-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:13px}.lib-route-head h2{margin-top:3px;font-size:21px;letter-spacing:-.04em}.lib-route-head p{max-width:660px;margin-top:5px;color:#718097;font-size:12px;line-height:1.6}.lib-route-head .btn{white-space:nowrap}
.lib-route-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px 12px}
.lib-route-row{display:grid;grid-template-columns:48px 11px minmax(0,1fr) auto;align-items:center;gap:9px;min-height:58px;padding:10px 11px;border:1px solid #e4eaf2;border-radius:14px;background:rgba(255,255,255,.83)}
.lib-route-time{font-variant-numeric:tabular-nums;color:#6f7f94;font-size:11px;font-weight:850}.lib-route-dot{width:9px;height:9px;border-radius:50%;background:var(--route-accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--route-accent) 15%,transparent)}
.lib-route-copy{min-width:0}.lib-route-copy b{display:block;overflow:hidden;color:#28334a;font-size:12px;line-height:1.4;white-space:nowrap;text-overflow:ellipsis}.lib-route-copy small{display:block;margin-top:3px;color:#8a98aa;font-size:10px}.lib-route-go{padding:6px 7px;border:0;border-radius:8px;background:#edf5ff;color:#2b78ed;font-size:10px;font-weight:850;cursor:pointer}.lib-route-go.muted{background:#f2f4f7;color:#8190a3}
.lib-catalog-card{border-color:#d5e3f2;background:linear-gradient(110deg,#eaf4ff,#fff 74%);box-shadow:0 10px 28px rgba(46,103,171,.08)}
.lib-catalog-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:11px}.lib-catalog-tags span{padding:5px 8px;border-radius:999px;background:rgba(255,255,255,.76);color:#5c7190;font-size:10px;font-weight:850}
.library-active .lib-toolbar{padding-top:12px;padding-bottom:12px}.library-active .lib-filter{gap:6px}.library-active .lib-filter button{border-radius:999px;background:#fff}.library-active .lib-filter button.on{box-shadow:0 3px 10px rgba(48,125,229,.13)}
.library-active .lib-section{margin-top:24px}.library-active .lib-section-head{margin-bottom:11px}.library-active .lib-section-head h2{font-size:21px;letter-spacing:-.045em}.library-active .lib-section-head p{font-size:12px}
.library-active .lib-rail{gap:12px;padding-top:2px;padding-bottom:17px}
.library-active .lib-card{flex-basis:236px;min-height:310px;border-radius:19px;border-color:#dfe7f1;background:#fff;box-shadow:0 7px 20px rgba(42,68,104,.065);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.library-active .lib-card.wide{flex-basis:278px}.library-active .lib-card:hover{transform:translateY(-4px);border-color:#b9d0e9;box-shadow:0 15px 30px rgba(42,68,104,.12)}
.library-active .lib-cover{position:relative;min-height:143px;border-radius:18px 18px 10px 10px;overflow:hidden;background:linear-gradient(135deg,var(--lib-accent),color-mix(in srgb,var(--lib-accent) 45%,#13213f))}
.library-active .lib-cover.listen{background:linear-gradient(135deg,#2168bd 0%,#55b9d7 60%,#9be3df 100%)}.library-active .lib-cover.read{background:linear-gradient(135deg,#b84f2b,#eea25e 58%,#ffd598)}.library-active .lib-cover.write{background:linear-gradient(135deg,#167c63,#51bd8e 62%,#b2ead0)}.library-active .lib-cover.speak{background:linear-gradient(135deg,#6e46b2,#c270bd 58%,#f3a5ae)}.library-active .lib-cover.vocabulary{background:linear-gradient(135deg,#5441b7,#8b78dc 62%,#d7caff)}
.lib-cover-orbit{position:absolute;border:1px solid rgba(255,255,255,.33);border-radius:50%;pointer-events:none}.lib-cover-orbit.one{right:-38px;bottom:-65px;width:170px;height:170px}.lib-cover-orbit.two{right:12px;bottom:-28px;width:98px;height:98px}
.library-active .lib-cover-index{position:absolute;right:15px;bottom:12px;color:rgba(255,255,255,.54);font-size:10px;font-weight:900;letter-spacing:.18em}.library-active .lib-cover-icon{position:relative;z-index:1;font-size:38px;text-shadow:0 8px 20px rgba(17,30,64,.25)}.library-active .lib-cover-title{position:relative;z-index:1;max-width:78%;font-size:13px;line-height:1.35}
.library-active .lib-card-body{padding:13px 14px 12px;min-height:157px}.lib-card-kicker{display:flex;align-items:center;justify-content:space-between;gap:7px;color:#9aa7b7;font-size:10px;font-weight:850}.lib-card-title{margin-top:7px;line-height:1.35}.library-active .lib-card-tags{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-top:8px;min-height:23px}.library-active .lib-card-tags span{max-width:100%;padding:4px 7px;border:1px solid #e1e8f1;border-radius:999px;background:#f7f9fc;color:#60728a;font-size:10px;line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.library-active .lib-card-tags span:last-child{color:#2f76d2;background:#eef6ff;border-color:#d8e8fa}.library-active .lib-card-desc{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;line-height:1.45}.library-active .lib-card-foot{padding-top:9px}.library-active .lib-card-foot button{font-weight:900}.library-active .lib-card-meta{margin-top:8px;padding-top:8px;border-top:1px solid #edf0f5}
.library-active .lib-index-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.library-active .lib-index-grid .lib-card{min-width:0}.library-active .lib-result-strip>div{border-color:#dfe7f1}
.lib-shadow-layout{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:13px}.lib-shadow-main{min-height:350px;display:flex;flex-direction:column;justify-content:center;text-align:center}.lib-shadow-line{display:flex;align-items:flex-start;gap:13px;max-width:700px;margin:18px auto 12px;padding:24px 22px;border-radius:19px;background:linear-gradient(135deg,#eff7ff,#fff);color:#1d2c46;font-family:var(--font-en);font-size:24px;line-height:1.5;text-align:left;box-shadow:inset 0 0 0 1px #dbe9f6}.lib-shadow-num{display:grid;place-items:center;flex:0 0 32px;height:32px;border-radius:10px;background:#2f76d2;color:#fff;font:800 14px var(--font-ui)}.lib-shadow-actions{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}.lib-shadow-tip{max-width:620px;margin:18px auto 0;color:var(--ink-3);font-size:11px;line-height:1.6}.lib-shadow-score{display:grid;place-items:center;padding:20px;border-radius:18px;background:linear-gradient(150deg,#f7efff,#fff);text-align:center}.lib-shadow-score span,.lib-shadow-score small{color:#8d7c9c;font-size:11px}.lib-shadow-score strong{display:block;margin:3px 0;font-size:42px;letter-spacing:-.08em;color:#8b5ac6}.lib-shadow-side audio{width:100%;margin-top:12px}.lib-shadow-side .btn{margin-top:12px}
.lib-game-shell{max-width:720px}.lib-game-prompt{padding:28px 20px;border-radius:19px;background:radial-gradient(circle at 80% 0%,#f1eaff,#fff 65%);text-align:center}.lib-game-label{display:block;color:#8d7baa;font-size:10px;font-weight:900;letter-spacing:.14em}.lib-game-prompt strong{display:block;margin-top:11px;color:#25233f;font:800 31px/1.25 var(--font-en)}.lib-game-options{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:12px}.lib-game-options button{display:flex;align-items:center;gap:9px;min-height:52px;padding:11px 12px;border:1px solid var(--line);border-radius:13px;background:#fff;color:var(--ink);font-size:13px;text-align:left;cursor:pointer}.lib-game-options button:hover{border-color:#b79ce7;background:#fbf9ff}.lib-game-options button span{display:grid;place-items:center;width:23px;height:23px;border-radius:8px;background:#f0ecfc;color:#7657c7;font-size:11px;font-weight:900}.lib-game-options button.correct{border-color:#8bcda9;background:#effaf3}.lib-game-options button.wrong{border-color:#e7a7a5;background:#fff3f2}.lib-game-feedback{min-height:31px;margin:9px 0 2px;color:#6f7f94;font-size:12px;text-align:center}.lib-game-feedback.good{color:#218655}.lib-game-feedback.bad{color:#c64d49}
:root[data-theme="dark"] .library-active,:root[data-theme="dark"] .library-active .lib-tools-section,:root[data-theme="dark"] .library-active .lib-route-card{background:#0f1826}.library-active:has(:root[data-theme="dark"]){background:#0f1826}
:root[data-theme="dark"] .library-active .lib-tools-section,:root[data-theme="dark"] .library-active .lib-route-card{border-color:#26394f;background:#152235}.library-active .lib-tool,:root[data-theme="dark"] .library-active .lib-tool,.library-active .lib-stat,:root[data-theme="dark"] .library-active .lib-stat,.library-active .lib-route-row,:root[data-theme="dark"] .library-active .lib-route-row{background:#17273c;border-color:#2a405a}.library-active .lib-tool-copy b,:root[data-theme="dark"] .library-active .lib-tool-copy b,.library-active .lib-route-copy b,:root[data-theme="dark"] .library-active .lib-route-copy b{color:#edf3fb}.library-active .lib-shadow-line,:root[data-theme="dark"] .library-active .lib-shadow-line,.library-active .lib-game-prompt,:root[data-theme="dark"] .library-active .lib-game-prompt{background:#192a40;color:#eef4fb}.library-active .lib-game-options button,:root[data-theme="dark"] .library-active .lib-game-options button{background:#17273c;color:#eef4fb;border-color:#2b425d}
@media (max-width:1120px){.lib-tool-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.library-active .lib-index-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:899px){
  .library-active .lib-page{padding-bottom:92px}.library-active .lib-hero-main{min-height:270px;padding:23px}.library-active .lib-hero h1{font-size:29px}.library-active .lib-goal{min-height:0}
  .library-active .lib-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.library-active .lib-stat:last-child{grid-column:span 2}.lib-tools-section,.lib-route-card{padding:17px 14px;border-radius:20px}.lib-tool-grid{grid-template-columns:1fr 1fr;gap:8px}.lib-tool{min-height:91px;padding:11px 10px;grid-template-columns:35px minmax(0,1fr) auto;column-gap:8px}.lib-tool-icon{width:35px;height:35px;border-radius:11px;font-size:19px}.lib-tool-copy b{font-size:12px}.lib-tool-copy small{font-size:9px}.lib-tool-time{font-size:9px}.lib-route-head{display:block}.lib-route-head .btn{width:100%;margin-top:12px}.lib-route-list{grid-template-columns:1fr}.lib-route-row{grid-template-columns:43px 9px minmax(0,1fr) auto;gap:7px}.library-active .lib-index-grid{grid-template-columns:1fr}.lib-shadow-layout{display:block}.lib-shadow-side{margin-top:12px}.lib-shadow-line{font-size:19px;padding:19px 16px}.lib-shadow-actions .btn{flex:1 1 42%;font-size:12px}.lib-game-options{grid-template-columns:1fr}.lib-game-prompt strong{font-size:27px}
}
@media (prefers-reduced-motion:reduce){.lib-tool,.library-active .lib-card{transition:none}.lib-tool:hover,.library-active .lib-card:hover{transform:none}}

/* Keep the catalogue readable when the app shell switches to dark or follows
   the operating-system theme. The catalogue deliberately has its own surface
   hierarchy, so these overrides live after the desktop/mobile polish rules. */
:root[data-theme="dark"] body.library-active,
:root[data-theme="auto"] body.library-active{--bg:#0f1826;--surface:#152235;--surface-2:#192a40;--line:#2a405a;--line-2:#38516e;--ink:#edf3fb;--ink-2:#b6c7da;--ink-3:#8fa4bb;background:#0f1826;color:var(--ink)}
:root[data-theme="dark"] body.library-active .topbar,
:root[data-theme="auto"] body.library-active .topbar{background:rgba(15,24,38,.94);border-color:#26394f}
:root[data-theme="dark"] body.library-active .tabbar,
:root[data-theme="auto"] body.library-active .tabbar{background:rgba(21,34,53,.97);border-color:#26394f}
:root[data-theme="dark"] body.library-active .lib-goal,
:root[data-theme="auto"] body.library-active .lib-goal{background:linear-gradient(155deg,#182941 0%,#152235 100%);border-color:#2d4561;box-shadow:0 18px 44px rgba(0,0,0,.22)}
:root[data-theme="dark"] body.library-active .lib-stat,
:root[data-theme="auto"] body.library-active .lib-stat{background:#17273c;border-color:#2a405a;box-shadow:0 7px 22px rgba(0,0,0,.16)}
:root[data-theme="dark"] body.library-active .lib-tools-section,
:root[data-theme="dark"] body.library-active .lib-route-card,
:root[data-theme="auto"] body.library-active .lib-tools-section,
:root[data-theme="auto"] body.library-active .lib-route-card{background:#152235;border-color:#2a405a;box-shadow:0 8px 24px rgba(0,0,0,.16)}
:root[data-theme="dark"] body.library-active .lib-tool,
:root[data-theme="dark"] body.library-active .lib-route-row,
:root[data-theme="auto"] body.library-active .lib-tool,
:root[data-theme="auto"] body.library-active .lib-route-row{background:#17273c;border-color:#2a405a}
:root[data-theme="dark"] body.library-active .lib-card,
:root[data-theme="auto"] body.library-active .lib-card{background:#152235;border-color:#2a405a;box-shadow:0 7px 20px rgba(0,0,0,.2)}
:root[data-theme="dark"] body.library-active .lib-card:hover,
:root[data-theme="auto"] body.library-active .lib-card:hover{border-color:#4c7298;box-shadow:0 15px 30px rgba(0,0,0,.28)}
:root[data-theme="dark"] body.library-active .lib-tool-copy b,
:root[data-theme="dark"] body.library-active .lib-route-copy b,
:root[data-theme="auto"] body.library-active .lib-tool-copy b,
:root[data-theme="auto"] body.library-active .lib-route-copy b{color:#edf3fb}
:root[data-theme="dark"] body.library-active .lib-tool-copy small,
:root[data-theme="dark"] body.library-active .lib-route-copy small,
:root[data-theme="auto"] body.library-active .lib-tool-copy small,
:root[data-theme="auto"] body.library-active .lib-route-copy small{color:#9db0c5}
:root[data-theme="dark"] body.library-active .lib-filter button,
:root[data-theme="auto"] body.library-active .lib-filter button{background:#17273c;border-color:#2a405a;color:#c3d2e2}
:root[data-theme="dark"] body.library-active .lib-filter button.on,
:root[data-theme="auto"] body.library-active .lib-filter button.on{background:#203c5e;border-color:#4c88c8;color:#b9dcff}
:root[data-theme="dark"] body.library-active .lib-card-kicker,
:root[data-theme="dark"] body.library-active .lib-card-desc,
:root[data-theme="dark"] body.library-active .lib-section-head p,
:root[data-theme="dark"] body.library-active .lib-card-meta,
:root[data-theme="auto"] body.library-active .lib-card-kicker,
:root[data-theme="auto"] body.library-active .lib-card-desc,
:root[data-theme="auto"] body.library-active .lib-section-head p,
:root[data-theme="auto"] body.library-active .lib-card-meta{color:var(--ink-2)}
:root[data-theme="dark"] body.library-active .lib-card-tags span,
:root[data-theme="auto"] body.library-active .lib-card-tags span{background:#1c3048;border-color:#324d6a;color:#b8cae0}
:root[data-theme="dark"] body.library-active .lib-card-tags span:last-child,
:root[data-theme="auto"] body.library-active .lib-card-tags span:last-child{background:#203c5e;border-color:#315b83;color:#a8d0ff}
:root[data-theme="dark"] body.library-active .lib-card-meta,
:root[data-theme="auto"] body.library-active .lib-card-meta{border-color:#2b4058}
:root[data-theme="dark"] body.library-active .lib-result-strip>div,
:root[data-theme="auto"] body.library-active .lib-result-strip>div{background:#152235;border-color:#2a405a}
:root[data-theme="dark"] body.library-active .lib-route-go,
:root[data-theme="auto"] body.library-active .lib-route-go{background:#203c5e;color:#a8d0ff}
:root[data-theme="dark"] body.library-active .lib-route-go.muted,
:root[data-theme="auto"] body.library-active .lib-route-go.muted{background:#1d2b3e;color:#98aac0}
:root[data-theme="dark"] body.library-active .lib-audio-wrap,
:root[data-theme="auto"] body.library-active .lib-audio-wrap{background:linear-gradient(135deg,#1a3049,#152235);border-color:#2d4966}
:root[data-theme="dark"] body.library-active .lib-speak-points li,
:root[data-theme="auto"] body.library-active .lib-speak-points li{background:rgba(255,255,255,.07)}
:root[data-theme="dark"] body.library-active .lib-flash,
:root[data-theme="auto"] body.library-active .lib-flash{background:#17273c;color:var(--ink)}
:root[data-theme="dark"] body.library-active .lib-flash.revealed,
:root[data-theme="auto"] body.library-active .lib-flash.revealed{background:radial-gradient(circle at 50% 0%,#29365a,#152235 62%)}
:root[data-theme="dark"] body.library-active .lib-flash .example,
:root[data-theme="auto"] body.library-active .lib-flash .example{background:rgba(255,255,255,.08);color:var(--ink-2)}
:root[data-theme="dark"] body.library-active .lib-shadow-line,
:root[data-theme="auto"] body.library-active .lib-shadow-line{background:linear-gradient(135deg,#1b3450,#17273c);border-color:#2d4966;color:#e6f0fb}
:root[data-theme="dark"] body.library-active .lib-game-prompt,
:root[data-theme="auto"] body.library-active .lib-game-prompt{background:radial-gradient(circle at 80% 0%,#29305a,#17273c 65%);color:var(--ink)}
:root[data-theme="dark"] body.library-active .lib-game-prompt strong,
:root[data-theme="auto"] body.library-active .lib-game-prompt strong{color:#f1efff}
:root[data-theme="dark"] body.library-active .lib-game-options button,
:root[data-theme="auto"] body.library-active .lib-game-options button{background:#17273c;border-color:#2b425d;color:#eef4fb}
:root[data-theme="dark"] body.library-active .lib-game-options button:hover,
:root[data-theme="auto"] body.library-active .lib-game-options button:hover{background:#20344c;border-color:#6b81b0}

@media (prefers-color-scheme:dark){
  :root[data-theme="auto"] body.library-active{--bg:#0f1826;--surface:#152235;--surface-2:#192a40;--line:#2a405a;--line-2:#38516e;--ink:#edf3fb;--ink-2:#b6c7da;--ink-3:#8fa4bb;background:#0f1826;color:var(--ink)}
  :root[data-theme="auto"] body.library-active .topbar{background:rgba(15,24,38,.94);border-color:#26394f}
  :root[data-theme="auto"] body.library-active .tabbar{background:rgba(21,34,53,.97);border-color:#26394f}
}