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

body {
  font-family: -apple-system, sans-serif;
  background: #1a1a2e;
  color: #e0e0e0;
  padding: 20px;
}

h1 { text-align: center; margin-bottom: 4px; }
.subtitle { text-align: center; color: #888; margin-bottom: 20px; }

.container {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.controls {
  flex: 0 0 260px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.upload-area {
  border: 2px dashed #555;
  border-radius: 8px;
  padding: 30px 10px;
  text-align: center;
  cursor: pointer;
}
.upload-area:hover { border-color: #7c83ff; }
.upload-area p { color: #888; }

label { font-size: 0.85rem; color: #aaa; }
label input[type="range"] { width: 100%; display: block; margin-top: 4px; }

.checkbox-label { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.checkbox-label input[type="checkbox"] { width: auto; margin: 0; }

button {
  padding: 10px;
  background: #7c83ff;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
button:disabled { opacity: 0.4; cursor: not-allowed; }

footer {
  text-align: center;
  margin-top: 24px;
  font-size: 0.85rem;
}
footer a { color: #7c83ff; text-decoration: none; }
footer a:hover { text-decoration: underline; }

.preview-section { flex: 1; min-width: 300px; }

#canvas {
  max-width: 100%;
  background: #16213e;
  border-radius: 8px;
  cursor: grab;
}