html, body {
      margin: 0;
      padding: 0;
      overflow: hidden;
      background: linear-gradient(135deg, #fceabb, #f8b500);
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    #canvas {
      display: block;
    }

    #menu {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background: rgba(255, 255, 255, 0.8);
      padding: 30px 50px;
      border-radius: 15px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      z-index: 2;
    }

    #menu h1 {
      margin-bottom: 20px;
      font-size: 24px;
      color: #333;
    }

    #start-btn {
      padding: 10px 20px;
      font-size: 16px;
      background-color: #f8b500;
      border: none;
      border-radius: 8px;
      color: white;
      cursor: pointer;
      box-shadow: 0 2px 8px rgba(0,0,0,0.15);
      transition: background-color 0.3s;
    }

    #start-btn:hover {
      background-color: #d89c00;
    }