.course-header {
        background: linear-gradient(145deg, #1e0ed0c3 0%, #a821d5d0 75%, rgba(255, 61, 174, 0.839) 100%);
        color: white;
        padding: 2rem 0;
        margin-bottom: 2rem;
    }
    .lesson-card {
        transition: transform 0.2s;
        margin-bottom: 1rem;
    }
    .lesson-card:hover {
        transform: translateY(-3px);
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    }