:root{color-scheme:dark;--bg:#071014;--card:#0d1b22;--line:#1c3945;--text:#ecf8f5;--muted:#90aaa8;--green:#53e6a5;--cyan:#68d9ff;--danger:#ff8181}
*{box-sizing:border-box}
body{margin:0;background:radial-gradient(circle at 10% 0,#12303a 0,transparent 38%),linear-gradient(145deg,#061014,#08161b 55%,#071014);font:15px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--text);min-height:100vh}
.shell{width:min(1120px,calc(100% - 32px));margin:auto;padding:42px 0 64px}
header{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:22px}
h1{font-size:clamp(28px,5vw,52px);line-height:1.05;margin:0;letter-spacing:-.04em}h2{margin:0 0 8px;font-size:20px}
.eyebrow{color:var(--green);font-weight:800;letter-spacing:.18em;margin:0 0 8px}.badge{border:1px solid var(--line);padding:7px 12px;border-radius:999px;color:var(--cyan);background:#0a171d}
.grid{display:grid;grid-template-columns:1.05fr .95fr;gap:18px}.card{background:linear-gradient(145deg,rgba(16,36,44,.94),rgba(9,24,30,.96));border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:0 24px 80px rgba(0,0,0,.24)}
.muted{color:var(--muted);margin:0 0 16px}.qr-wrap{width:230px;height:230px;border-radius:18px;background:#fff;margin:20px auto;display:grid;place-items:center;overflow:hidden;color:#32434a}.qr-wrap img{width:100%;height:100%;display:none;image-rendering:pixelated}.status-row{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:14px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.actions.compact{margin:0;justify-content:flex-end}button{appearance:none;border:0;border-radius:12px;padding:11px 15px;font-weight:750;cursor:pointer}button:disabled{opacity:.42;cursor:not-allowed}.primary{background:var(--green);color:#062016}.secondary{background:#15313b;color:var(--text);border:1px solid #28505e}
.big-state{font-size:32px;font-weight:850;color:var(--green);margin:30px 0}dl{display:grid;grid-template-columns:100px 1fr;gap:10px;margin:0}dt{color:var(--muted)}dd{margin:0}.callout{margin-top:24px;padding:14px;background:#0a171c;border-left:3px solid var(--cyan);color:#b8cecd}
.player-card,.log-card{margin-top:18px}.player-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}.track-card{display:flex;align-items:center;gap:14px;margin-top:18px;padding:16px;border:1px solid var(--line);border-radius:16px;background:#08171d}.track-card strong,.track-card span{display:block}.track-card strong{font-size:19px}.track-card span{color:var(--muted);margin-top:2px}.track-mark{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:var(--green);color:#062016;font-weight:900}audio{width:100%;margin:18px 0}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.metrics div{padding:14px;background:#08171d;border-radius:14px}.metrics span{display:block;color:var(--muted);font-size:12px}.metrics strong{font-size:18px;color:var(--cyan)}
pre{height:260px;overflow:auto;background:#061015;padding:16px;border-radius:14px;color:#b8d7d3;white-space:pre-wrap}.error{color:var(--danger)!important}
@media(max-width:760px){.grid,.metrics{grid-template-columns:1fr}.shell{width:min(100% - 20px,1120px);padding-top:24px}header{align-items:flex-start;gap:12px}.qr-wrap{width:200px;height:200px}.player-head{display:block}.actions.compact{justify-content:flex-start;margin-top:12px}}