:root{
  --bg:#0f1222;
  --panel:#161a33;
  --panel-2:#1b2040;
  --text:#eef1ff;
  --muted:#aab0d9;
  --accent:#7c8cff;
  --accent-2:#34d399;
  --warn:#f59e0b;
  --error:#ef4444;
  --chip:#262a52;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --radius:16px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font:500 16px/1.5 Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,#0a0d1a 0%, #0f1222 40%, #0a0d1a 100%);
}
.sr-only{position:absolute;left:-9999px}

.app-header{
  display:flex;align-items:center;gap:16px;justify-content:space-between;
  padding:16px 20px;background:#0b0e1b;position:sticky;top:0;z-index:10;box-shadow:var(--shadow);
}
.app-header h1{margin:0;font-size:20px;letter-spacing:.3px}
.top-actions .btn{margin-right:8px}

.app-footer{padding:16px 20px;color:var(--muted);text-align:center;opacity:.8}

#screens{padding:20px;max-width:1200px;margin:0 auto}

.card{
  background:linear-gradient(180deg,var(--panel) 0%, var(--panel-2) 100%);
  border:1px solid #23274f;border-radius:var(--radius);box-shadow:var(--shadow);
  padding:16px;
}
.hero{padding:24px}
.sub{color:var(--muted);margin-top:6px}

.cta-grid{display:flex;gap:12px;margin:18px 0 8px;flex-wrap:wrap}
.bullets{margin:10px 0 0 18px;color:var(--muted)}

.screen{display:none}
.screen.active{display:block}

.toolbar .row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.input-group{display:flex;align-items:center;gap:8px;background:#101433;border:1px solid #23274f;border-radius:12px;padding:6px 8px}
.input-group input{background:transparent;border:none;outline:none;color:var(--text);min-width:160px}

.btn, .btn-sm{
  background:#1b2146;color:#e9ecff;border:1px solid #2a3062;cursor:pointer;
  padding:10px 14px;border-radius:12px;transition:transform .05s ease, background .2s;
}
.btn:hover{background:#222a59}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(90deg,#6b7cff,#34d399);border:none;color:#081022}
.btn-sm{padding:6px 10px;font-size:12px}

.divider{width:1px;height:28px;background:#2a3062;margin:0 8px}
.flex-spacer{flex:1}

.workspace{display:grid;grid-template-columns:1fr 280px;gap:16px;margin:16px 0}
@media (max-width: 900px){
  .workspace{grid-template-columns:1fr}
}

.board{display:flex;gap:10px;min-height:120px;align-items:center;justify-content:center;padding:26px}
.sound-box{
  min-width:72px;min-height:72px;display:flex;align-items:center;justify-content:center;
  border:2px dashed #3a4180;border-radius:14px;background:#13183a;position:relative;
}
.sound-box.highlight-initial:nth-child(1),
.sound-box.highlight-medial:nth-child(n+2):not(:last-child),
.sound-box.highlight-final:last-child{
  box-shadow:0 0 0 3px var(--accent) inset;
}
.show-index .slot-index{position:absolute;top:6px;left:6px;font-size:12px;color:var(--muted)}

.tile{
  background:#262e68;border:1px solid #3b438a;border-radius:12px;padding:10px 14px;min-width:48px;text-align:center;
  font-weight:700;font-size:20px;cursor:grab;user-select:none;box-shadow:var(--shadow);
}
.tile:active{cursor:grabbing}
.tile.ghost{opacity:.5}

.bank{margin:16px 0}
.bank-header{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.tile-grid{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}

.history .history-header{display:flex;align-items:center;justify-content:space-between}
.history-list{margin:10px 0 0 18px;max-height:260px;overflow:auto}
.history-list li{color:var(--muted);padding:2px 0}
.history-list li button{margin-left:8px}

.switch{display:flex;align-items:center;gap:8px}
.switch input{transform:scale(1.2)}

.list-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;margin-top:12px}
.list-card{padding:14px}
.list-card h4{margin:0 0 6px}

.settings-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
.set{border:1px dashed #2a3062;border-radius:12px;padding:12px}
.input-inline{display:inline-flex;align-items:center;gap:8px}