*{box-sizing:border-box}
:root{
  --bg:#0b0b0d;
  --card:#151518;
  --line:#2a2a30;
  --text:#f4f4f5;
  --muted:#9898a2;
  --accent:#ffffff;
  --danger:#9f2d2d;
  --warn:#8a6418;
  --success:#22683d;
}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
body{min-height:100vh}
a{color:inherit}
.centered{display:grid;place-items:center;padding:24px}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;border-bottom:1px solid var(--line);background:#101012;position:sticky;top:0;z-index:10}
.container{width:min(980px,calc(100% - 32px));margin:32px auto}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 8px 30px rgba(0,0,0,.18)}
.login-card,.player-card{width:min(480px,100%)}
h1,h2{margin:0 0 16px}
h1{font-size:clamp(28px,5vw,42px)}
h2{font-size:22px}
.muted{color:var(--muted)}
label{display:block;margin:0 0 8px;font-size:14px;color:#d8d8dc}
input[type=text],input[type=password],input[type=file]{width:100%;padding:12px 13px;border-radius:10px;border:1px solid var(--line);background:#0f0f12;color:var(--text)}
button,.button-link,.link-button{border:0;border-radius:10px;padding:11px 15px;background:var(--accent);color:#000;font-weight:700;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.secondary{background:#29292f;color:#fff}
.warn{background:var(--warn);color:#fff}
.danger{background:var(--danger);color:#fff}
.success{background:var(--success);color:#fff}
.alert{padding:12px 14px;background:#3b1717;border:1px solid #6e2929;border-radius:10px;margin-bottom:16px}
.grid-form{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-form .full{grid-column:1/-1}
.section-head{display:flex;align-items:center;gap:10px;margin:30px 0 12px}
.badge{display:inline-flex;min-width:28px;height:28px;align-items:center;justify-content:center;background:#28282d;border-radius:99px;color:#ddd}
.demo-list{display:grid;gap:12px}
.demo-row{display:flex;justify-content:space-between;gap:20px;align-items:center}
.demo-main{min-width:0;flex:1}
.demo-title{font-size:18px;font-weight:800}
.url-box{display:flex;gap:8px;margin-top:14px}
.url-box input{min-width:0;flex:1}
.actions{display:flex;gap:8px;align-items:center}
.cover{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:16px;margin-bottom:22px;background:#1c1c20}
.placeholder{display:grid;place-items:center;font-size:72px;font-weight:900;letter-spacing:-6px;color:#777}
.player-card{text-align:center}
.player-card audio{width:100%;margin-top:18px}
.eyebrow{font-size:12px;letter-spacing:.22em;color:#8f8f98;margin-bottom:9px}
.artist{font-size:18px;color:#c0c0c7;margin-top:-8px}
.private-note{font-size:12px;color:#777;margin:18px 0 0}
.player-page{background:radial-gradient(circle at 50% 0,#242429 0,#0b0b0d 45%)}
@media(max-width:700px){
  .grid-form{grid-template-columns:1fr}
  .demo-row{align-items:stretch;flex-direction:column}
  .actions{justify-content:flex-start}
  .url-box{flex-wrap:wrap}
  .url-box input{flex-basis:100%}
}