header {
    background: var(--primary);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 15px 0;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    color: white;
}

.btn-secondary {
    background: var(--secondary);
    color: var(--dark);
}

.btn-secondary:hover {
    background: #e0a520;
    color: var(--dark);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

.section {
    padding: 80px 0;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

.section-title h2 {
    font-size: 2.5rem;
    display: inline-block;
    margin-bottom: 15px;
    position: relative;
    color: var(--dark);
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--secondary);
    border-radius: 2px;
}

.section-title p {
    color: var(--gray);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 20px auto 0;
}

/* Hero Section for Courses */
.courses-hero {
    background: linear-gradient(135deg, rgba(44, 95, 140, 0.9) 0%, rgba(29, 70, 105, 0.95) 100%), url('https://images.unsplash.com/photo-1499951360447-b19be8fe80f5?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
    padding: 100px 0 60px;
    color: white;
    text-align: center;
}

.courses-hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.courses-hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: white;
    line-height: 1.2;
}

.courses-hero p {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

/* Courses Filter */
.courses-filter {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    padding: 25px;
    margin: -40px auto 60px;
    max-width: 1200px;
    position: relative;
    z-index: 10;
}

.filter-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.filter-title i {
    color: var(--primary);
}

.filter-title h3 {
    font-size: 1.4rem;
    color: var(--dark);
}

.filter-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.filter-group {
    margin-bottom: 10px;
}

.filter-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark);
}

.filter-group select, .filter-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background: white;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.filter-group select:focus, .filter-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(44, 95, 140, 0.1);
}

.filter-actions {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    margin-top: 15px;
}

/* Courses Grid */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.course-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    height: 100%;
    border: none;
    position: relative;
}

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

.card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-body {
    padding: 25px;
}

.badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--secondary);
    color: var(--dark);
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    z-index: 2;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.card-text {
    color: var(--gray);
    margin-bottom: 20px;
    min-height: 72px;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    color: var(--gray);
    font-size: 0.9rem;
}

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

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 25px;
    background: #f8fafc;
    border-top: 1px solid #e2e8f0;
}

.price {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.25rem;
}

.original-price {
    text-decoration: line-through;
    color: var(--gray);
    font-size: 0.9rem;
    margin-right: 5px;
}

/* Categories Section */
.categories {
    background: white;
    padding: 60px 0;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.category-card {
    background: #f8fafc;
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid #e2e8f0;
}

.category-card:hover {
    background: white;
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.category-icon {
    width: 70px;
    height: 70px;
    background: rgba(44, 95, 140, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
    color: var(--primary);
}

.category-card h3 {
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.category-card p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    margin-top: 50px;
    gap: 10px;
}

.pagination a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: white;
    color: var(--dark);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.pagination a:hover, .pagination a.active {
    background: var(--primary);
    color: white;
}

/* Responsive Design */
@media (max-width: 992px) {
    .nav-links {
        display: none;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .courses-hero h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .course-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
    
    .filter-options {
        grid-template-columns: 1fr;
    }
    
    .courses-hero {
        padding: 80px 0 40px;
    }
}

@media (max-width: 576px) {
    .nav-actions {
        display: none;
    }
    
    .courses-hero h1 {
        font-size: 2rem;
    }
    
    .courses-hero p {
        font-size: 1rem;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
}