* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #000;
  color: #fff;
  overflow: hidden;
}

#canvas-container {
  width: 100vw;
  height: 100vh;
}

#overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.6);
  z-index: 10;
}

h1 {
  font-size: 1.4rem;
  margin-bottom: 0.25rem;
}

p {
  font-size: 0.9rem;
  opacity: 0.9;
  margin-bottom: 0.5rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin: 0.5rem 0;
}

button {
  background: #1e8e3e;
  color: #fff;
  border: none;
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
}

button:hover {
  background: #2da44e;
}

label {
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

input[type="range"] {
  width: 120px;
}

.hint {
  font-size: 0.75rem;
  opacity: 0.7;
  margin-top: 0.25rem;
}