:root{
  --bg:#f6f4ef; --card:#ffffff; --ink:#1c1b19; --muted:#6b675f; --line:#e4e0d6;
  --accent:#c2410c; --accent-ink:#ffffff; --ok:#15803d; --danger:#b91c1c;
  --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans",sans-serif;-webkit-user-select:none;user-select:none}
input,textarea{-webkit-user-select:text;user-select:text}
.hidden{display:none!important}

.top{display:flex;align-items:center;gap:12px;padding:12px 20px;border-bottom:1px solid var(--line);background:var(--card)}
.brand{font-weight:700;letter-spacing:.2px}
.who{margin-left:auto;color:var(--muted);font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:50vw}
.link{background:none;border:0;color:var(--accent);font:inherit;font-size:14px;cursor:pointer;padding:4px}

main{max-width:1100px;margin:0 auto;padding:24px 16px 48px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin:0 auto 20px}
.card.center{max-width:480px;text-align:center;margin-top:8vh}
.card h1{font-size:24px;margin:0 0 8px}
.card h2{font-size:18px;margin:0 0 12px}
.hint{color:var(--muted);font-size:13px}
.err{color:var(--danger);font-size:14px;min-height:1em}
.ok{color:var(--ok);font-size:14px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--ink);font:inherit;font-weight:600;cursor:pointer}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.danger{color:var(--danger);border-color:#f0c4c4}
.btn:disabled{opacity:.5;cursor:default}

.spinner{width:28px;height:28px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;margin:0 auto 8px;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- player ---------- */
#classTitle{font-size:20px;margin:0 0 12px}
.stage{position:relative;width:100%;aspect-ratio:16/9;background:#000;border-radius:var(--radius);overflow:hidden}
.stage:fullscreen{width:100vw;height:100vh;aspect-ratio:auto;border-radius:0}
.stage:-webkit-full-screen{width:100vw;height:100vh;aspect-ratio:auto;border-radius:0}
.stage.theater{position:fixed;inset:0;z-index:1000;aspect-ratio:auto;border-radius:0;width:100vw;height:100vh;height:100dvh}
#playerBox,#playerBox iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.shield{position:absolute;inset:0 0 48px 0;z-index:2;cursor:pointer}
.wm{position:absolute;z-index:3;pointer-events:none;color:#fff;opacity:.45;font-size:clamp(11px,1.6vw,16px);font-weight:600;text-shadow:0 0 3px #000;white-space:nowrap;transition:left 1.2s ease,top 1.2s ease}
.wm-tile{position:absolute;inset:-20%;z-index:3;pointer-events:none;display:flex;flex-wrap:wrap;gap:60px 80px;align-content:space-around;justify-content:space-around;transform:rotate(-22deg);opacity:.07;color:#fff;font-size:14px;font-weight:700}
.controls{position:absolute;left:0;right:0;bottom:0;height:48px;z-index:4;display:flex;align-items:center;gap:6px;padding:0 10px;background:linear-gradient(transparent,rgba(0,0,0,.75))}
.controls button{background:none;border:0;color:#fff;font-size:18px;cursor:pointer;padding:6px 8px;border-radius:6px}
.controls button:hover{background:rgba(255,255,255,.15)}
.controls input[type=range]{width:90px;accent-color:#fff}
#liveBtn{font-size:13px;font-weight:700;color:#ff6b6b}
.spacer{flex:1}
.start{position:absolute;z-index:5;left:50%;top:50%;transform:translate(-50%,-50%);padding:16px 26px;border-radius:999px;border:0;background:var(--accent);color:#fff;font:inherit;font-size:18px;font-weight:700;cursor:pointer;box-shadow:0 8px 30px rgba(0,0,0,.4)}

.classgrid{display:grid;grid-template-columns:1fr;gap:16px}
.classgrid.with-chat{grid-template-columns:minmax(0,1fr) 340px}
.chat{width:100%;height:100%;min-height:420px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
@media (max-width:860px){.classgrid.with-chat{grid-template-columns:1fr}.chat{min-height:480px}}

/* ---------- admin ---------- */
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:12px;flex:1;min-width:220px}
.field label{font-size:13px;font-weight:600;color:var(--muted)}
.field input,textarea,.search{padding:10px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff;color:var(--ink);width:100%}
textarea{min-height:140px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:14px}
.pill{display:inline-block;padding:3px 10px;border-radius:999px;font-size:13px;font-weight:700}
.pill.live{background:#fee2e2;color:#b91c1c}
.pill.off{background:#eee;color:#555}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.4px}
td.small{color:var(--muted);font-size:12px}
.tablewrap{overflow-x:auto}
.check{display:flex;align-items:center;gap:8px;font-size:14px;margin:4px 0 14px}
a.btn{text-decoration:none}
@media (max-width:600px){
  .start{font-size:15px;padding:11px 18px;white-space:nowrap}
  .controls input[type=range]{display:none}
  .card{padding:20px}
  main{padding:16px 12px 40px}
}

/* ---------- batches & recordings ---------- */
.banner{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;background:#fee2e2;color:#991b1b;border:1px solid #fecaca;border-radius:var(--radius);padding:12px 16px;margin-bottom:16px}
.idle{max-width:none;margin-top:0}
.recs{margin-top:20px}
.batchname{font-size:15px;margin:18px 0 8px;color:var(--muted)}
.reclist{display:flex;flex-direction:column;gap:6px}
.rec{display:flex;align-items:center;gap:12px;width:100%;text-align:left;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);font:inherit;cursor:pointer}
.rec:hover{border-color:var(--accent)}
.rec.active{border-color:var(--accent);background:#fff7ed}
.rplay{color:var(--accent);font-size:13px}
.rtitle{flex:1;font-weight:600}
.rdate{color:var(--muted);font-size:13px;white-space:nowrap}
.seek{flex:1;min-width:60px;accent-color:var(--accent)}
.time{color:#fff;font-size:12px;white-space:nowrap;font-variant-numeric:tabular-nums}
.speed{background:rgba(0,0,0,.4);color:#fff;border:1px solid rgba(255,255,255,.3);border-radius:6px;font-size:12px;padding:3px 4px}
.controls input.seek{width:auto;display:block}
.controls input.seek.hidden{display:none!important}
.select{padding:10px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff;color:var(--ink);width:100%}
.checks{display:flex;flex-wrap:wrap;gap:4px 18px}
.batchrows{display:flex;flex-direction:column;gap:6px}
.batchrow{display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid var(--line);border-radius:10px}
.batchrow .hint{margin-left:auto}
@media (max-width:600px){.controls .time{display:none}}
.checks label.check{flex-direction:row;font-size:15px;font-weight:500;color:var(--ink);white-space:nowrap}
#globalMsg:empty{display:none}