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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  overflow: hidden;
  background: #f0f4f8;
}

/* Fullscreen Canvas */
#game-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  cursor: crosshair;
  image-rendering: pixelated;
}

/* Toolbar */
.toolbar {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  padding: 8px 12px;
  z-index: 100;
  gap: 8px;
  user-select: none;
}

.btn-group {
  display: flex;
  gap: 4px;
}

button {
  padding: 6px 10px;
  border: 1px solid #ddd;
  background: white;
  border-radius: 10px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

button:hover {
  background: #f5f5f5;
}

button.active {
  background: #e6f7e6;
  border-color: #4CAF50;
}

#mode-city.active { background: #e6f3ff; border-color: #2196F3; }

#hand-mode.active { background: #fff9e6; border-color: #FFC107; }

.divider {
  width: 1px;
  height: 28px;
  background: #ddd;
  margin: 0 8px;
}

#zoom-display {
  width: 40px;
  text-align: center;
  font-size: 14px;
  color: #555;
}

/* Palette */
.palette {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  padding: 10px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-width: 160px;
}

.palette button {
  text-align: left;
  padding: 8px 12px;
  font-size: 13px;
}

.palette button.active {
  background: #e6f7ff;
  border-color: #1890ff;
}

.palette .hint {
  font-size: 11px;
  color: #777;
  padding: 4px 12px;
  margin-top: 4px;
  border-top: 1px solid #eee;
}