.courses-section {
    padding: 80px 0;
    background-color: #FFFFFF;
}

.course-container {
    margin-top: 40px;
}

.course-row {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 80px;
    background-color: #f9f9f9;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.course-info {
    flex: 1;
    min-width: 300px;
    padding: 30px;
}

.course-title {
    color: #C24914;
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.course-details {
    margin-bottom: 15px;
    color: #666;
}

.course-grade, .course-duration {
    margin-bottom: 5px;
    font-size: 1rem;
}

.course-description {
    line-height: 1.6;
    color: #444;
    margin-bottom: 20px;
}

.video-note {
    color: #C24914;
    font-weight: 500;
    font-style: italic;
    font-size: 0.9rem;
    margin-top: 10px;
    text-align: center;
}

.course-video {
    flex: 1;
    min-width: 300px;
    position: relative;
    display: flex;
    flex-direction: column;
}

.course-video-player {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    min-height: 300px;
    transition: transform 0.3s ease;
    cursor: pointer;
}

.course-thumbnail {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.3s ease;
    z-index: 1;
}

.course-video:hover .course-thumbnail {
    opacity: 0;
}

.course-video a {
    display: block;
    height: 100%;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.course-video a::after {
    content: '\f144';
    font-family: 'Font Awesome 5 Free';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    color: white;
    opacity: 0.8;
    transition: opacity 0.3s;
    z-index: 3;
}

.course-video a:hover::after {
    opacity: 1;
}

.course-video a:hover .course-video-player {
    transform: scale(1.05);
}

.course-video-player[preload="none"] {
    background-color: #000;
}

@media (max-width: 992px) {
    .course-row {
        flex-direction: column;
    }
    
    .course-info, .course-video {
        width: 100%;
    }
    
    .course-video-player {
        min-height: 350px;
    }
}

@media (max-width: 768px) {
    .courses-section {
        padding: 60px 0;
    }
    
    .course-row {
        margin-bottom: 40px;
    }
    
    .course-info {
        padding: 20px;
    }
    
    .course-title {
        font-size: 1.3rem;
    }
    
    .course-video-player {
        min-height: 250px;
    }
}

@media (max-width: 480px) {
    .courses-section {
        padding: 40px 0;
    }
    
    .course-row {
        margin-bottom: 30px;
    }
    
    .course-video-player {
        min-height: 200px;
    }
}