:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-purple: #8b5cf6;
  --border-color: #334155;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}
.mp-container { max-width: 1400px; margin: 0 auto; padding: 20px; }
header { text-align: center; margin-bottom: 24px; }
header h1 {
  font-size: 1.8rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 6px;
}
header .subtitle { color: var(--text-secondary); font-size: 0.95rem; }
.main-layout { display: grid; grid-template-columns: 1fr 320px; gap: 20px; }
@media (max-width: 1024px) { .main-layout { grid-template-columns: 1fr; } }
.canvas-section {
  background: var(--bg-card); border-radius: 12px; border: 1px solid var(--border-color);
  overflow: hidden;
}
.canvas-wrapper { position: relative; width: 100%; aspect-ratio: 1 / 1; min-height: 400px; background: #fff; }
.canvas-wrapper canvas { width: 100%; height: 100%; display: block; cursor: grab; }
.canvas-wrapper canvas.dragging { cursor: grabbing; }
.hint-bar {
  display: flex; flex-wrap: wrap; gap: 16px; padding: 10px 16px;
  background: var(--bg-secondary); border-top: 1px solid var(--border-color);
  font-size: 0.78rem; color: var(--text-muted); text-align: center; justify-content: center;
}
.controls-panel { display: flex; flex-direction: column; gap: 16px; }
.control-card {
  background: var(--bg-card); border-radius: 12px; border: 1px solid var(--border-color); padding: 16px;
}
.control-card h3 {
  font-size: 0.85rem; font-weight: 600; color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px;
}
.preset-grid { display: grid; grid-template-columns: 1fr; gap: 8px; }
.preset-btn {
  background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: 8px;
  padding: 10px 12px; color: var(--text-primary); font-size: 0.8rem; cursor: pointer;
  transition: all 0.2s; text-align: left; display: flex; align-items: center; gap: 10px;
}
.preset-btn:hover { background: var(--bg-hover); border-color: var(--accent-blue); }
.preset-btn.active { background: rgba(59,130,246,0.15); border-color: var(--accent-blue); }
.preset-btn .preset-name { font-weight: 600; display: block; }
.preset-btn .preset-desc { font-size: 0.7rem; color: var(--text-muted); display: block; }
.layer-selectors { display: flex; flex-direction: column; gap: 10px; }
.layer-group { display: flex; flex-direction: column; gap: 4px; }
.layer-group label {
  font-size: 0.78rem; color: var(--text-secondary); font-weight: 600;
}
.layer-group select {
  width: 100%; padding: 8px 10px; background: var(--bg-primary); color: var(--text-primary);
  border: 1px solid var(--border-color); border-radius: 8px; font-size: 0.85rem;
  cursor: pointer; outline: none; transition: border-color 0.2s;
  -webkit-appearance: none; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
}
.layer-group select:hover { border-color: var(--accent-blue); }
.layer-group select:focus { border-color: var(--accent-blue); }
.slider-group { margin-bottom: 14px; }
.slider-group:last-child { margin-bottom: 0; }
.slider-label {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 6px;
}
.slider-value { font-weight: 600; color: var(--text-primary); min-width: 30px; text-align: right; }
.slider-unit { font-size: 0.7rem; color: var(--text-muted); min-width: 28px; text-align: left; }
input[type="range"] {
  width: 100%; height: 6px; -webkit-appearance: none; appearance: none;
  background: var(--bg-primary); border-radius: 3px; outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent-blue); cursor: pointer; transition: transform 0.15s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }
input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%; background: var(--accent-blue); cursor: pointer; border: none;
}
.reset-btn {
  width: 100%; padding: 10px; background: var(--bg-primary); border: 1px solid var(--border-color);
  border-radius: 8px; color: var(--text-secondary); font-size: 0.85rem; cursor: pointer; transition: all 0.2s;
}
.reset-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.explanation {
  background: var(--bg-card); border-radius: 12px; border: 1px solid var(--border-color);
  padding: 24px; margin-top: 20px;
}
.explanation h2 { font-size: 1.1rem; margin-bottom: 16px; color: var(--text-primary); }
.explanation p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 12px; line-height: 1.7; }
.explanation p:last-child { margin-bottom: 0; }
@media (max-width: 768px) {
  .mp-container { padding: 12px; }
  header h1 { font-size: 1.4rem; }
  .canvas-wrapper { aspect-ratio: 1 / 1; min-height: 300px; }
}