* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #1a1a1f;
  font-family: 'Segoe UI', Roboto, Arial, sans-serif;
  color: #f5f5f5;
}

.app {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 24px;
}

h1 {
  margin: 0;
  font-size: 1.6rem;
}

h2 {
  margin: 12px 0 6px;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #b8b8c0;
}

.stage {
  background: #ff00ff22;
  border: 2px solid #ff00ff;
  border-radius: 12px;
  padding: 8px;
}

#gameCanvas {
  image-rendering: pixelated;
  display: block;
  background: transparent;
}

.controls {
  width: 100%;
  max-width: 360px;
  background: #26262e;
  border-radius: 12px;
  padding: 16px;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 8px 12px;
  background: #3a3a45;
  color: #f5f5f5;
  font-size: 0.85rem;
  transition: background 0.15s ease;
}

button:hover {
  background: #4a4a58;
}

button.active {
  background: #d000d0;
}

.speed-control,
.scale-control {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  font-size: 0.85rem;
}

input[type="range"] {
  flex: 1;
}