:root{
  --bg: #0b1020;
  --bg-grad: radial-gradient(1200px 600px at 20% -10%, #17204a 0%, #0b1020 60%) no-repeat fixed;
  --card: #111633;
  --text: #e8eeff;
  --muted: #9aa3c7;
  --primary: #6b8cff;
  --primary2:#3f6ff3;
  --success:#2dcc9f;
  --accent: #60e0b2;
  --border:#253056;
  --error:#ff6b6b;
}

*{box-sizing:border-box}
html,body{height:100%;margin:0;background:var(--bg-grad);color:var(--text);
  font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}

.container{max-width:980px;margin:0 auto;padding:22px}

.header .brand{display:flex;gap:14px;align-items:center}
.logo{width:46px;height:46px;border-radius:12px;border:1px solid var(--border);background:#1b2350;object-fit:contain}
h1{margin:0;font-size:34px;letter-spacing:.3px}
.accent{color:var(--accent)}
.subtitle{margin:6px 0 0;color:var(--muted)}

.tabs{display:flex;gap:10px;margin-top:8px}
.tab-btn{border:1px solid var(--border);background:rgba(255,255,255,.05);color:var(--text);
  padding:10px 14px;border-radius:12px;font-weight:700;cursor:pointer;user-select:none}
.tab-btn.active{background:linear-gradient(180deg,var(--primary),var(--primary2));color:#fff;border-color:transparent}

.tab-pane{display:none}
.tab-pane.active{display:block}

.card{margin-top:12px;background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.01));
  border:1px solid var(--border);border-radius:18px;box-shadow:0 16px 50px rgba(0,0,0,.35);
  backdrop-filter:blur(4px);padding:18px}

.group{border:1px solid var(--border);border-radius:14px;padding:14px}

.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:900px){ .grid-3,.grid-2{ grid-template-columns:1fr } }

.form-row{display:grid;gap:6px}
label{color:var(--muted);font-size:14px;font-weight:600}
select,textarea,input[type="range"]{
  width:100%;background:var(--card);color:var(--text);
  border:1px solid var(--border);border-radius:12px;padding:11px 12px;outline:none
}
select{height:44px}
textarea{min-height:140px;line-height:1.5;resize:vertical}
.hint{color:var(--muted);font-size:12px}

.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px;align-items:center}
.btn{border:1px solid transparent;border-radius:12px;padding:12px 16px;font-weight:700;cursor:pointer;user-select:none}
.btn.primary{background:linear-gradient(180deg,var(--primary),var(--primary2));color:#fff}
.btn.success{background:linear-gradient(180deg,var(--success),#1fb58a);color:#04221b}
.btn.ghost{background:rgba(255,255,255,.06);border:1px solid var(--border);color:var(--text)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn:hover{opacity:.95}

.player{margin-top:16px;padding:12px;border:1px dashed var(--border);border-radius:12px;background:rgba(255,255,255,.04)}
.player.hidden{display:none}

.muted{color:var(--muted);font-size:14px}
.code{background:#0d1226;border:1px solid var(--border);border-radius:12px;padding:12px;overflow:auto;color:#dbe3ff}

.footer{color:var(--muted);font-size:14px;text-align:center;padding:24px 0 40px}