.ppt-card {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .ppt-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.2);
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f1f1; 
        }
        ::-webkit-scrollbar-thumb {
            background: #cbd5e1; 
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #94a3b8; 
        }
        .selection-step {
            position: relative;
        }
        .selection-step.active {
            background: linear-gradient(135deg, #0ea5e9, #3b82f6);
            color: white;
        }
        .selection-step.completed {
            background: #10b981;
            color: white;
        }
        .parameter-slider {
            -webkit-appearance: none;
            width: 100%;
            height: 8px;
            border-radius: 4px;
            background: #e5e7eb;
            outline: none;
        }
        .parameter-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #0ea5e9;
            cursor: pointer;
        }
        .parameter-slider::-moz-range-thumb {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #0ea5e9;
            cursor: pointer;
        }