/* Shared styles for the public pages: /r/{code}, /listen, /listen/{channel}, /listen/{channel}/{episode}.
   Tokens are the same Midnight (dark, default) / Swiss (light) pair used by index.html. */
:root{
  color-scheme:dark;
  --bg0:#0E0E13; --bg1:#16161D; --bg2:#1F1F28; --hairline:#2A2A35; --strongline:#3A3A48;
  --fg0:#F2F2F5; --fg1:#A9A9B5; --fg2:#6E6E7A;
  --primary:#3EE6C1; --on-primary:#0B0B0F; --primary-dim:#2BA88E;
  --unheard:#5CA8FF; --unheard-fill:rgba(92,168,255,.16);
  --unknown:#FF6B5E; --unknown-fill:rgba(255,107,94,.16);
  --gold:#F5C518; --success:#3EE6C1; --danger:#FF6B5E;
  --card-bg:var(--bg1); --card-border:var(--hairline);
  --btn-shadow:0 0 24px rgba(62,230,193,.30);
  --glow:radial-gradient(ellipse 720px 420px at 50% -10%, rgba(62,230,193,.14), transparent 70%);
  --radius:20px; --radius-sm:12px;
}
@media (prefers-color-scheme: light){
  :root{
    color-scheme:light;
    --bg0:#FFFFFF; --bg1:#FFFFFF; --bg2:#F2F2F2; --hairline:#E2E2E2; --strongline:#111111;
    --fg0:#111111; --fg1:#555555; --fg2:#999999;
    --primary:#111111; --on-primary:#FFFFFF; --primary-dim:#333333;
    --unheard:#0A5BFF; --unheard-fill:#E8F0FF;
    --unknown:#E5271D; --unknown-fill:#FDE9E7;
    --gold:#C7920A; --success:#0F9D58; --danger:#E5271D;
    --card-bg:#FFFFFF; --card-border:#111111;
    --btn-shadow:none; --glow:none;
    --radius:0; --radius-sm:0;
  }
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{background:var(--bg0);color:var(--fg0);font-family:-apple-system,"SF Pro Text","SF Pro Display",system-ui,"PingFang TC","Noto Sans TC","Helvetica Neue",sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh}
body::before{content:"";position:fixed;inset:0;background:var(--glow);pointer-events:none;z-index:0}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dim)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
svg{flex:none;display:block}
[hidden]{display:none !important}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.serif{font-family:"Source Serif 4",Georgia,"Times New Roman","Songti TC",serif}
.num{font-variant-numeric:tabular-nums}
.muted{color:var(--fg1)} .faint{color:var(--fg2)}
.tiny{font-size:12px;line-height:16px} .small{font-size:14px;line-height:20px}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--primary)}
.eyebrow.raw{text-transform:none;letter-spacing:.04em}
.narrow{max-width:680px}
h1{font-size:clamp(28px,4.4vw,44px);font-weight:800;letter-spacing:-.025em;line-height:1.15;text-wrap:balance}
h2{font-size:22px;font-weight:700;letter-spacing:-.01em;line-height:1.3}
h3{font-size:16px;font-weight:700;line-height:1.35}

/* Nav / footer */
nav.top{display:flex;align-items:center;justify-content:space-between;height:64px;border-bottom:1px solid var(--hairline)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--fg0)}
.brand .zh{font-weight:600;color:var(--fg1);font-size:14px}
.logo circle{fill:var(--primary)} .logo path{stroke:var(--primary)}
.navlinks{display:flex;gap:22px;align-items:center;font-size:14px}
.navlinks a{color:var(--fg1)} .navlinks a:hover{color:var(--fg0)}
.navlinks a.btn,.navlinks a.btn:hover{color:var(--on-primary)}
footer.bottom{border-top:1px solid var(--hairline);margin-top:64px;padding:28px 0 48px;color:var(--fg2);font-size:13px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
footer.bottom a{color:var(--fg2)}

/* Buttons, chips, cards */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;white-space:nowrap;border-radius:14px;background:var(--primary);color:var(--on-primary);font-weight:700;font-size:15px;box-shadow:var(--btn-shadow);border:1px solid var(--primary);text-align:center}
.btn:hover{color:var(--on-primary);filter:brightness(1.05)}
.btn.ghost{background:transparent;color:var(--fg0);border:1.5px solid var(--strongline);box-shadow:none}
.btn.ghost:hover{color:var(--fg0);background:var(--bg2)}
.btn.sm{min-height:36px;padding:0 14px;font-size:13px;border-radius:10px}
.btn:disabled{opacity:.5;cursor:default}
.chip{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border:1px solid var(--hairline);border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.02em;color:var(--fg1);white-space:nowrap;background:var(--bg1)}
.chip.strong{border-color:var(--primary);color:var(--primary)}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius);padding:24px}
.card.soft{background:var(--bg2);border-color:var(--hairline)}
.stack{display:flex;flex-direction:column;gap:12px}

/* Layout: main + sticky aside */
.grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:56px;align-items:start;margin-top:32px}
.grid > aside{position:sticky;top:24px;display:flex;flex-direction:column;gap:28px}
.main{display:flex;flex-direction:column;gap:36px;min-width:0}
@media (max-width:900px){
  .grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .grid > aside{position:static}
  nav.top .navlinks a.plain{display:none}
}

/* Word marks */
.w-unheard{background:var(--unheard-fill);color:var(--unheard);border-bottom:2px solid var(--unheard);padding:0 3px;border-radius:4px 4px 0 0}
.w-unknown{background:var(--unknown-fill);color:var(--unknown);border-bottom:2px solid var(--unknown);padding:0 3px}

/* Sentence rows (transcript + report) */
.sent{display:flex;gap:14px;align-items:flex-start;padding:12px 0;border-top:1px solid var(--hairline);scroll-margin-top:24px}
.sent:first-child{border-top:0}
.sent .play{width:32px;height:32px;border-radius:10px;border:1px solid var(--strongline);background:var(--bg1);display:flex;align-items:center;justify-content:center;flex:none;margin-top:2px;color:var(--fg0)}
.sent .play:hover{border-color:var(--primary);color:var(--primary)}
.sent .play.on{background:var(--primary);color:var(--on-primary);border-color:var(--primary)}
.sent .body{flex:1;min-width:0}
.sent .en{font-size:19px;line-height:1.65}
.sent .tr{font-size:14px;line-height:20px;color:var(--fg1);margin-top:4px}
.sent .meta{font-size:12px;color:var(--fg2);margin-top:4px}
.sent .idx{font-size:12px;color:var(--fg2);flex:none;padding-top:8px}
.sent.active{background:linear-gradient(90deg,var(--unheard-fill),transparent 60%);margin:0 -12px;padding-left:12px;padding-right:12px;border-radius:var(--radius-sm)}
@media (max-width:600px){.sent .en{font-size:17px}}
.sent-list.collapsed .sent.extra{display:none}
.expand{width:100%;padding:14px 0;border-top:1px solid var(--hairline);text-align:center;color:var(--fg1);font-size:13px}
.expand:hover{color:var(--primary)}

/* Audio player */
.player{display:flex;align-items:center;gap:12px;padding:10px 14px;border:1px solid var(--hairline);border-radius:var(--radius-sm);background:var(--bg1)}
.player audio{flex:1;min-width:0;height:36px}
.player .now{font-size:12px;color:var(--fg2);white-space:nowrap}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.stats.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.stat{padding:14px 0;border-top:1px solid var(--hairline)}
.stat .n{font-size:32px;font-weight:800;letter-spacing:-.02em;line-height:1.1}
.stat .n small{font-size:14px;font-weight:600;color:var(--success);margin-left:6px}
.stat .n small.down{color:var(--danger)}
.stat .l{font-size:12px;color:var(--fg2);margin-top:4px}
@media (max-width:480px){.stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.stat .n{font-size:24px}}

/* Vocabulary */
.vocab{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 24px}
@media (max-width:700px){.vocab{grid-template-columns:minmax(0,1fr)}}
.vitem{display:flex;gap:12px;align-items:flex-start;padding:10px 0;border-top:1px solid var(--hairline)}
.vitem .lemma{font-size:18px;font-weight:700}
.vitem .rank{display:inline-block;font-size:11px;font-weight:700;padding:1px 7px;border-radius:999px;background:var(--bg2);color:var(--fg1);margin-left:6px;vertical-align:middle;letter-spacing:.02em}
.vitem .rank.hot{background:var(--unheard-fill);color:var(--unheard)}
.vitem .gloss{font-size:14px;line-height:20px;color:var(--fg1);margin-top:2px}
.vitem .cnt{font-size:12px;color:var(--fg2);white-space:nowrap;padding-top:6px}

/* Quiz widget */
.quiz{display:flex;flex-direction:column;gap:18px}
.quiz .head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
.quiz .bar{display:flex;gap:6px}
.quiz .bar i{flex:1;height:4px;background:var(--hairline);border-radius:2px}
.quiz .bar i.ok{background:var(--success)} .quiz .bar i.miss{background:var(--fg0)}
.quiz .qrow{display:flex;align-items:center;gap:16px}
.quiz .bigplay{width:56px;height:56px;border-radius:16px;border:1px solid var(--strongline);display:flex;align-items:center;justify-content:center;color:var(--fg0);flex:none}
.quiz .bigplay.on{border-color:var(--primary);color:var(--primary)}
.quiz .two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.quiz .score{display:flex;align-items:baseline;gap:14px}
.quiz .score b{font-size:64px;font-weight:800;letter-spacing:-.03em;line-height:1}
.quiz .cta{border-top:1px solid var(--hairline);padding-top:16px;display:flex;flex-direction:column;gap:8px}
.quiz .btns{display:flex;gap:10px;flex-wrap:wrap}
.choices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
@media (max-width:480px){.choices{grid-template-columns:minmax(0,1fr)}}
.choice{min-height:48px;padding:10px 14px;border:1.5px solid var(--strongline);border-radius:var(--radius-sm);text-align:left;font-size:16px;font-weight:600;background:var(--bg1)}
.choice:hover{border-color:var(--primary)}
.choice.right{border-color:var(--success);background:var(--unheard-fill);color:var(--success)}
.choice.wrong{border-color:var(--danger);color:var(--danger);background:var(--unknown-fill)}
.choice:disabled{cursor:default}
.masked{font-size:20px;line-height:1.6}
.masked .blank{display:inline-block;min-width:4.5em;border-bottom:2px solid var(--primary);text-align:center;color:var(--primary);font-weight:700}
.feedback{font-size:14px;color:var(--fg1);min-height:20px}
.feedback.ok{color:var(--success)} .feedback.no{color:var(--danger)}

/* Report card page */
.report-head{padding:40px 0 8px}
.report-sents .sent .en{font-size:20px}
.fallback-words{display:flex;flex-wrap:wrap;gap:8px}
.fallback-words span{padding:6px 12px;border-radius:10px;background:var(--unheard-fill);color:var(--unheard);font-weight:600}

/* Channel index */
.ep-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
@media (max-width:900px){.ep-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.ep-grid{grid-template-columns:minmax(0,1fr)}}
.ep-card{display:flex;flex-direction:column;gap:10px;padding:20px;border:1px solid var(--card-border);border-radius:var(--radius);background:var(--card-bg);min-height:170px;color:var(--fg0)}
.ep-card:hover{border-color:var(--primary);color:var(--fg0)}
.ep-card .t{font-size:18px;font-weight:700;line-height:1.35;flex:1}
.ep-card .top{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--fg2)}
.ch-card{display:flex;flex-direction:column;gap:12px;padding:24px;border:1px solid var(--card-border);border-radius:var(--radius);background:var(--card-bg)}
.ch-card h2 a{color:var(--fg0)} .ch-card h2 a:hover{color:var(--primary)}
.list{display:flex;flex-direction:column}
.list a{display:flex;gap:12px;padding:10px 0;border-top:1px solid var(--hairline);color:var(--fg0);font-size:14px;line-height:20px}
.list a:hover{color:var(--primary)}
.list a .d{color:var(--fg2);font-size:12px;width:40px;flex:none;padding-top:2px}
.list a .t{flex:1;min-width:0}
.list a .l{color:var(--fg2);font-size:12px;flex:none;padding-top:2px}
.pager{display:flex;justify-content:center;gap:8px;font-size:14px;margin-top:8px}
.pager a,.pager span{padding:6px 12px;border-radius:8px;color:var(--fg1)}
.pager .cur{border:1px solid var(--strongline);color:var(--fg0)}
.crumbs{font-size:12px;color:var(--fg2);display:flex;gap:8px;flex-wrap:wrap;padding-top:28px}
.crumbs a{color:var(--fg2)} .crumbs a:hover{color:var(--fg0)}

/* Lang tabs */
.tabs{display:flex;gap:14px;font-size:14px;flex-wrap:wrap}
.tabs button{color:var(--fg2);padding-bottom:2px;border-bottom:2px solid transparent}
.tabs button.on{color:var(--fg0);border-bottom-color:var(--primary)}

/* States */
.state{padding:80px 0;text-align:center;display:flex;flex-direction:column;align-items:center;gap:14px}
.state .big{font-size:44px}
.state p{color:var(--fg1);max-width:460px}
.skeleton{height:14px;border-radius:6px;background:var(--bg2);animation:pulse 1.2s ease-in-out infinite}
@keyframes pulse{50%{opacity:.5}}
.notice{font-size:13px;color:var(--fg2);line-height:1.6}
.qr{width:96px;height:96px;flex:none;background:#fff;border-radius:8px;padding:6px}
.qr canvas,.qr svg{width:100%;height:100%;display:block}