:root {
  color-scheme: dark;
  --bg: #0a0a0f;
  --panel: rgba(10, 10, 15, 0.62);
  --panel-line: rgba(255, 255, 255, 0.16);
  --ink: #f8fafc;
  --muted: rgba(248, 250, 252, 0.68);
  --accent: #52ead6;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  position: fixed;
  inset: 0;
}

canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  background:
    radial-gradient(circle at 18% 22%, rgba(82, 234, 214, 0.08), transparent 28vw),
    radial-gradient(circle at 82% 18%, rgba(138, 92, 246, 0.1), transparent 30vw),
    var(--bg);
}

.home-link {
  position: fixed;
  top: max(18px, env(safe-area-inset-top));
  left: max(18px, env(safe-area-inset-left));
  z-index: 2;
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  background: rgba(10, 10, 15, 0.54);
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 800;
  text-decoration: none;
  backdrop-filter: blur(18px);
  transition: border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.home-link:hover {
  border-color: rgba(82, 234, 214, 0.72);
  color: var(--accent);
  transform: translateY(-1px);
}

.controls {
  position: fixed;
  right: max(14px, env(safe-area-inset-right));
  bottom: max(14px, env(safe-area-inset-bottom));
  left: max(14px, env(safe-area-inset-left));
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 1fr)) auto;
  align-items: end;
  gap: 14px;
  max-width: 820px;
  padding: 14px;
  margin: 0 auto;
  border: 1px solid var(--panel-line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 22px 80px rgba(0, 0, 0, 0.32);
  backdrop-filter: blur(18px);
}

.field {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.field span {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
}

.field output {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  width: 100%;
  min-width: 0;
  accent-color: var(--accent);
}

button {
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid rgba(82, 234, 214, 0.48);
  border-radius: 999px;
  background: rgba(82, 234, 214, 0.12);
  color: var(--ink);
  font: inherit;
  font-size: 0.84rem;
  font-weight: 800;
  cursor: pointer;
  transition: background 180ms ease, transform 180ms ease;
}

button:hover {
  background: rgba(82, 234, 214, 0.22);
  transform: translateY(-1px);
}

.status {
  position: fixed;
  top: max(20px, env(safe-area-inset-top));
  right: max(18px, env(safe-area-inset-right));
  z-index: 2;
  color: rgba(248, 250, 252, 0.55);
  font-size: 0.76rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

@media (max-width: 760px) {
  .controls {
    grid-template-columns: 1fr;
    gap: 10px;
    max-width: 430px;
    padding: 12px;
  }

  .field {
    gap: 5px;
  }

  button {
    width: 100%;
  }

  .status {
    display: none;
  }
}

@media (max-width: 420px) {
  .controls {
    right: 10px;
    bottom: 10px;
    left: 10px;
  }

  .home-link {
    width: 40px;
    height: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .home-link,
  button {
    transition: none;
  }
}