body {
  font-family: 'Inter', Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f3f4f6;
}

canvas {
  max-width: 100vw;
  width: 100%;
  height: auto;
  border: 1px solid #ddd;
  background: #fff;
  border-radius: 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  touch-action: none;
}

@media (max-width: 640px) {
  .max-w-6xl {
    max-width: 100vw;
    padding: 0.5rem;
  }
  .grid {
    display: block;
  }
  .rounded-xl {
    border-radius: 0.75rem;
  }
}

#canvas-drag-area {
  position: relative;
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  touch-action: none;
}

.overlay-text {
  position: absolute;
  left: 50%;
  top: 90%;
  transform: translate(-50%, -50%);
  color: #fff;
  font-size: 1.5rem;
  font-weight: bold;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
  pointer-events: none;
  user-select: none;
}