.div-container {
        margin-left: auto;
        margin-right: auto;
            background: #2c3e50;
            border: 4px solid #3f8fef;
        padding: 30px;
        border-radius: 12px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        width: 100%;
        max-width: 800px;
        text-align: center;
        }
        .canvas-container {
            width: 100%;
            background-color: #f1f5f9;
            background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
            background-size: 20px 20px;
            border-radius: 12px;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 400px;
            position: relative;
            overflow: hidden;
            border: 2px solid #e2e8f0;
        }
        canvas {
            max-width: 100%;
            max-height: 60vh;
            object-fit: contain;
            box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
            z-index: 10;
        }
        .loading-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(4px);
            z-index: 100;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .control-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-top: 20px;
        }
        .control-card {
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            padding: 1rem;
            border-radius: 0.75rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        input[type="range"] { accent-color: #4f46e5; height: 6px; }
        .filter-label {
            display: flex;
            justify-content: space-between;
            font-size: 11px;
            font-weight: 700;
            color: #475569;
            text-transform: uppercase;
        }