html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #050814;
  height: 100vh;
  width: 100vw;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: #fff;
}

#sketch-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
}

canvas {
  display: block;
}

.controls-overlay {
  position: absolute;
  top: 1.5rem;
  left: 1.5rem;
  z-index: 10;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1rem 1.25rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  max-width: calc(100vw - 3rem);
}

.title-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.title-bar h1 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, #a5b4fc, #38bdf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.back-link {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s ease;
}

.back-link:hover {
  color: #f1f5f9;
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

button {
  background: rgba(255, 255, 255, 0.08);
  color: #e2e8f0;
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

button:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

button.action-btn {
  background: rgba(56, 189, 248, 0.15);
  border-color: rgba(56, 189, 248, 0.3);
  color: #38bdf8;
}

button.action-btn:hover {
  background: rgba(56, 189, 248, 0.3);
  border-color: rgba(56, 189, 248, 0.5);
}