:root {
  --bg: #10131c;
  --panel: #191f2d;
  --text: #e8ecf6;
  --muted: #a8b2c7;
  --accent: #8dc5ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 0%, #1d2436 0%, #10131c 40%),
    linear-gradient(160deg, #0b0f17, #171d2b);
  color: var(--text);
  font-family: "Avenir Next", "Segoe UI", sans-serif;
}

.app {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
}

.toolbar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  background: color-mix(in srgb, var(--panel) 92%, #000);
  border: 1px solid #2c354a;
  border-radius: 12px;
  padding: 0.75rem;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.control label {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.control input[type="range"] {
  width: 100%;
}

button {
  border: 1px solid #3e4d6a;
  background: #22314d;
  color: var(--text);
  border-radius: 8px;
  font-size: 0.95rem;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

.canvas-wrap {
  border: 1px solid #2c354a;
  border-radius: 12px;
  padding: 0.5rem;
  overflow: auto;
  background: #070a10;
}

canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

.hidden-input {
  display: none;
}