:root {
    --bg: #FAFAF8;
    --text: #1a1a1a;
    --text-secondary: #555;
    --accent: #E85D26;
    --accent-dark: #c44a1c;
    --blue: #2266aa;
    --purple: #6B21A8;
    --gold: #B8860B;
    --red: #c22;
    --border: #e0ddd8;
    --card-bg: #fff;
    --code-bg: #f4f2ee;
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }


  /* ============ 3D VISUAL EMBED ============ */
  .visual-embed {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    margin: 40px auto;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    overflow: hidden;
    max-width: 1024px;
    text-align: center;
  }
  @media (max-width: 800px) { .visual-embed { margin: 32px 0; } }

  #three-wrap {
    width: 100%;
    height: 480px;
    position: relative;
    cursor: grab;
    background: #fff;
  }
  #three-wrap:active { cursor: grabbing; }
  #three-wrap canvas {display: block;position: relative;left: 0;}

  .v-top-bar {
    padding: 8px 14px;
    background: #f8f8f8;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
  }
  .v-top-bar h4 {
    font-family: 'DM Sans', sans-serif;
    font-size: 13px;
    font-weight: 700;
    color: #222;
    margin-right: auto;
  }
  .v-status {
    font-family: 'DM Sans', sans-serif;
    font-size: 11px;
    color: #666;
    width: 100%;
    margin-top: 2px;
  }
  .v-controls {
    padding: 8px 14px;
    background: #f8f8f8;
    border-top: 1px solid #eee;
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
  }
  .v-btn {
    padding: 6px 12px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background: #fff;
    color: #555;
    cursor: pointer;
    font-family: 'DM Sans', sans-serif;
    font-size: 12px;
    transition: all 0.15s;
    user-select: none;
  }
  .v-btn:hover { border-color: #aaa; }
  .v-btn.active {
    border: 2px solid var(--accent);
    background: #fff5ef;
    color: var(--accent-dark);
    font-weight: 600;
  }

  .v-legend {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(255,255,255,0.92);
    padding: 8px 12px;
    border-radius: 6px;
    font-family: 'DM Sans', sans-serif;
    font-size: 11px;
    color: #444;
    border: 1px solid #e0e0e0;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
    line-height: 1.7;
    pointer-events: none;
  }
  .v-legend .dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 4px; vertical-align: middle; }
  .v-legend .line { display: inline-block; width: 12px; height: 2px; margin-right: 4px; vertical-align: middle; border-radius: 1px; }

  .v-info {
    position: absolute;
    bottom: 8px;
    left: 8px;
    background: rgba(255,255,255,0.94);
    padding: 8px 12px;
    border-radius: 6px;
    font-family: 'DM Sans', sans-serif;
    font-size: 11px;
    color: #444;
    border: 1px solid #e0e0e0;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
    max-width: 290px;
    line-height: 1.55;
    pointer-events: none;
  }
  .v-info b { color: #222; }