body {
  background: #111;
  color: #eee;
  font-family: system-ui, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 20px;
}

h1 {
  margin: 0;
}

.controls {
  display: flex;
  gap: 16px;
  align-items: center;
}

button {
  padding: 8px 14px;
  border: none;
  border-radius: 6px;
  background: #444;
  color: white;
  cursor: pointer;
}

button:hover {
  background: #666;
}

svg {
  width: 420px;
  max-width: 90vw;
  border-radius: 12px;
  box-shadow:
    inset 0 0 25px rgba(255,255,255,0.2),
    0 20px 60px rgba(0,0,0,0.6);
}