* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            height: 100vh;
            display: flex;
            overflow: hidden;
        }

        .container {
            display: flex;
            width: 100%;
            height: 100%;
        }

        .sidebar {
            width: 250px;
            background: rgba(255, 255, 255, 0.95);
            padding: 15px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }

        .sidebar h1 {
            font-size: 1.3rem;
            margin-bottom: 5px;
            color: #667eea;
        }

        .control-group {
            display: flex;
            flex-direction: column;
            gap: 3px;
        }

        .control-row {
            display: flex;
            gap: 8px;
        }

        .control-row .control-group {
            flex: 1;
        }

        .slider-group {
            display: flex;
            gap: 5px;
            align-items: center;
        }

        .slider-group input[type="range"] {
            flex: 1;
        }

        .slider-group input[type="number"] {
            width: 60px;
            flex-shrink: 0;
        }

        .button-row {
            display: flex;
            gap: 8px;
            margin-top: 5px;
        }

        .button-row button {
            flex: 1;
        }

        .sidebar select,
        .sidebar input,
        .sidebar button {
            width: 100%;
            padding: 6px;
            border: 1px solid #ccc;
            border-radius: 4px;
            font-size: 13px;
        }

        .sidebar input[type="checkbox"] {
            width: auto;
            padding: 0;
            margin: 0;
        }

        .sidebar button {
            background: #667eea;
            color: white;
            border: none;
            cursor: pointer;
            font-weight: bold;
        }

        .sidebar button:hover {
            background: #5568d3;
        }

        .sidebar label {
            font-size: 11px;
            color: #666;
            font-weight: 500;
        }

        .canvasWrap {
            flex: 1;
            background: white;
            margin: 10px;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            padding: 10px;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }

        #canvas {
            border: 2px solid #667eea;
            border-radius: 5px;
            background: #f8f9fa;
            width: 100%;
            height: 100%;
        }