*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { background: #0a0a0a; overflow: hidden; font-family: monospace; }
nav {
  position: fixed; top: 0; left: 0; z-index: 10;
  padding: 1rem 1.5rem;
}
nav a { color: #aaa; text-decoration: none; font-size: 0.85rem; }
nav a:hover { color: #fff; }
canvas { display: block; width: 100vw; height: 100vh; }

.controls {
  position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%);
  background: rgba(0,0,0,0.6); backdrop-filter: blur(10px);
  padding: 1.25rem 1.5rem; border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.08);
  display: flex; flex-direction: column; gap: 0.75rem;
  min-width: 260px;
}
label { color: #aaa; font-size: 0.8rem; display: flex; flex-direction: column; gap: 0.3rem; }
input[type=range] { accent-color: #fff; cursor: pointer; }
.presets { display: flex; gap: 0.5rem; }
.presets button {
  flex: 1; padding: 0.4rem; background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15); color: #fff;
  border-radius: 6px; cursor: pointer; font-family: monospace; font-size: 0.75rem;
}
.presets button:hover { background: rgba(255,255,255,0.15); }