/* Portuguese ceramic wall backdrop */
  .ceramic-wall-bg {
    background-color: #f1f5f9;
    background-image: 
      radial-gradient(#0038a8 0.85px, transparent 0.85px),
      radial-gradient(#0038a8 0.85px, #f1f5f9 0.85px);
    background-size: 28px 28px;
    background-position: 0 0, 14px 14px;
  }

  /* Prime pulse indicator */
  @keyframes primeGlow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(251, 191, 36, 0.7); }
    50% { box-shadow: 0 0 0 8px rgba(251, 191, 36, 0); }
  }
  .prime-pulse {
    animation: primeGlow 1.6s infinite;
  }

  #fractile-canvas {
    cursor: grab;
    touch-action: none;
  }
  #fractile-canvas:active {
    cursor: grabbing;
  }