/* Courses Page Specific Styles */

/* Hero Section */
.courses-hero {
    padding-top: 180px;
    padding-bottom: 100px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f7ff 0%, #e8ecff 100%);
}

/* Introduction Section */
.courses-intro {
    padding: 100px 0;
    background: white;
}

/* Courses Section */
.courses-section {
    padding: 100px 0;
}

.course-categories {
    margin-bottom: 40px;
}

.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.category-tab {
    padding: 10px 20px;
    border-radius: 50px;
    background: white;
    border: 1px solid var(--light-gray);
    color: var(--gray-color);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.category-tab:hover {
    color: var(--primary-color);
    border-color: var(--primary-light);
}

.category-tab.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.course-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.4s ease;
    position: relative;
}

.course-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.course-image {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.course-card:hover .course-image img {
    transform: scale(1.05);
}

.course-level {
    position: absolute;
    top: 15px;
    right: 15px;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
}

.course-level.beginner {
    background: var(--success-color);
}

.course-level.intermediate {
    background: var(--warning-color);
}

.course-level.advanced {
    background: var(--danger-color);
}

.course-content {
    padding: 25px;
}

.course-category {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.course-category.ai {
    background: rgba(255, 3, 62, 0.1);
    color: var(--primary-color);
}

.course-category.ml {
    background: rgba(57, 173, 74, 0.1);
    color: var(--secondary-color);
}

.course-category.nlp {
    background: rgba(76, 188, 232, 0.1);
    color: var(--accent-color);
}

.course-category.cv {
    background: rgba(108, 99, 255, 0.1);
    color: var(--primary-dark);
}

.course-category.data {
    background: rgba(240, 173, 78, 0.1);
    color: var(--warning-color);
}

.course-content h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.course-description {
    color: var(--gray-color);
    margin-bottom: 20px;
    min-height: 60px;
}

.course-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--gray-color);
}

.course-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--light-gray);
}

.course-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-color);
}

/* CTA Section */
.courses-cta {
    padding: 120px 0;
    position: relative;
    overflow: hidden;
}

.courses-cta .cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* Course Modal */
.course-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.course-modal.active {
    opacity: 1;
    visibility: visible;
}

.course-modal .modal-content {
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 40px;
    position: relative;
    background: white;
    color: var(--dark-color);
    border-radius: 12px;
}

.course-modal .modal-header {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
}

.course-modal .modal-image {
    width: 200px;
    height: 200px;
    border-radius: 12px;
    overflow: hidden;
    flex-shrink: 0;
}

.course-modal .modal-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-modal .modal-title {
    flex: 1;
}

.course-modal .modal-title h2 {
    margin-bottom: 15px;
}

.course-modal .modal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
}

.course-modal .modal-meta span {
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    background: var(--light-gray);
}

.course-modal .modal-price {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.course-modal .modal-divider {
    height: 1px;
    background: var(--light-gray);
    margin: 20px 0;
}

.course-modal .modal-section {
    margin-bottom: 30px;
}

.course-modal .modal-section h3 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.course-modal .details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.course-modal .detail-item {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.course-modal .detail-item i {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-top: 3px;
}

.course-modal .detail-item h4 {
    margin-bottom: 5px;
    font-size: 1rem;
}

.course-modal .modal-actions {
    display: flex;
    gap: 20px;
    margin-top: 40px;
}

.course-modal ul {
    list-style-type: none;
    margin-bottom: 20px;
}

.course-modal ul li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
}

.course-modal ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* Responsive Styles */
@media (max-width: 992px) {
    .course-modal .modal-header {
        flex-direction: column;
    }
    
    .course-modal .modal-image {
        width: 100%;
        height: 250px;
    }
}

@media (max-width: 768px) {
    .courses-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
    
    .course-modal .modal-actions {
        flex-direction: column;
    }
}

@media (max-width: 576px) {
    .category-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 10px;
    }
    
    .courses-cta .cta-buttons {
        flex-direction: column;
    }
    
    .course-modal .details-grid {
        grid-template-columns: 1fr;
    }
}