:root {
  --bg: #0e0e13;
  --panel: #171722;
  --text: #e7e7ee;
  --muted: #9aa0a6;
  --brand: #7c4dff;
  --button: #2a2a3a;
  --button-hover: #34344a;
  --primary: #7c4dff;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 800px at 70% -10%, #1a1a28 0, var(--bg) 45%);
}
header, footer { text-align: center; padding: 1rem 1rem 0.5rem; }
h1 { margin: .2rem 0 .4rem; font-weight: 700; letter-spacing: .2px; }
.tagline { margin: 0; color: var(--muted); }
main { max-width: 1100px; margin: 0 auto; padding: 1rem; }

.controls {
  background: var(--panel);
  border: 1px solid #24243a;
  border-radius: 14px;
  padding: .9rem;
  display: grid;
  gap: .6rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  align-items: center;
}
button, select, input[type="range"] {
  background: var(--button);
  color: var(--text);
  border: 1px solid #3a3a55;
  border-radius: 10px;
  padding: .65rem .85rem;
}
button:hover { background: var(--button-hover); cursor: pointer; }
button.primary { background: var(--primary); border-color: #9067ff; }
button.primary:hover { filter: brightness(1.04); }

.sliders { display: flex; gap: .8rem; align-items: center; }
.sliders label { font-size: .9rem; color: var(--muted); display: flex; gap: .5rem; align-items: center; }
input[type="range"] { width: 140px; }

.stage {
  margin-top: 1rem;
  background: #0a0a10;
  border: 1px solid #23233a;
  border-radius: 14px;
  padding: .5rem;
}
#viz {
  width: 100%;
  height: auto;
  display: block;
  background: linear-gradient(180deg, #0a0a12 0%, #0b0b18 100%);
  border-radius: 10px;
}

.kbd-hint { color: var(--muted); font-size: .85rem; }
kbd {
  background: #25253a; color: #eaeaff; padding: 0 .3rem; border-radius: 4px; border: 1px solid #3a3a55;
}
footer { color: var(--muted); }