body {
            max-width: 1000px;
            margin: 0 auto;
            padding: 20px;
            background-color: #f5f7fa;
            color: #333;
        }
        h1 {
            color: #2c3e50;
            text-align: center;
            margin-bottom: 10px;
        }
        .description {
            text-align: center;
            margin-bottom: 20px;
            color: #7f8c8d;
        }
        .container {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .canvas-container {
            background: white;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            padding: 15px;
            position: relative;
        }
        canvas {
            display: block;
            margin: 0 auto;
            background-color: #f8f9fa;
            border-radius: 4px;
            cursor: pointer;
        }
        .controls {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            background: white;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            padding: 15px;
        }
        .control-group {
            flex: 1;
            min-width: 200px;
        }
        h2 {
            font-size: 1.2em;
            margin-top: 0;
            color: #3498db;
            border-bottom: 1px solid #eee;
            padding-bottom: 8px;
        }
        .button-group {
            display: flex;
            gap: 10px;
            margin-top: 10px;
        }
        button {
            padding: 8px 15px;
            background-color: #3498db;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.2s;
        }
        button:hover {
            background-color: #2980b9;
        }
        button.reset {
            background-color: #e74c3c;
        }
        button.reset:hover {
            background-color: #c0392b;
        }
        .info-panel {
            background: white;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            padding: 15px;
        }
        .info-item {
            margin: 8px 0;
            display: flex;
            justify-content: space-between;
        }
        .info-label {
            font-weight: bold;
            color: #2c3e50;
        }
        .info-value {
            color: #3498db;
        }
        .instructions {
            background: #e8f4fc;
            border-left: 4px solid #3498db;
            padding: 10px 15px;
            margin-top: 15px;
            border-radius: 0 4px 4px 0;
        }
        .instructions h3 {
            margin-top: 0;
            color: #2c3e50;
        }
        .instructions ul {
            margin: 5px 0;
            padding-left: 20px;
        }
        .instructions li {
            margin: 5px 0;
        }