.courses-hero {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-medium) 100%);
    color: white;
    padding: 4rem 0 3rem;
    position: relative;
    overflow: hidden;
}

.courses-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 20"><defs><radialGradient id="a" cx="50%25" cy="0%25" r="100%25"><stop offset="0%25" stop-color="%23fff" stop-opacity=".1"/><stop offset="100%25" stop-color="%23fff" stop-opacity="0"/></radialGradient></defs><rect width="100" height="20" fill="url(%23a)"/></svg>') repeat-x;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    display: block;
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 0.5rem;
}

.filters-section {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 51, 102, 0.08);
    margin: -2rem 1rem 3rem 1rem;
    position: relative;
    z-index: 3;
    border: 1px solid rgba(51, 102, 153, 0.1);
}

.search-container {
    position: relative;
    margin-bottom: 2rem;
}

.search-input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    background: #fafbfc;
    transition: all 0.3s ease;
}

.search-input:focus {
    border-color: var(--primary-medium);
    background: white;
    box-shadow: 0 0 0 4px rgba(51, 102, 153, 0.08);
    outline: none;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #64748b;
    font-size: 1.1rem;
}

.filter-tabs {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-tab {
    padding: 0.75rem 1.5rem;
    border: 2px solid #e2e8f0;
    border-radius: 25px;
    background: white;
    color: #64748b;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-tab.active,
.filter-tab:hover {
    border-color: var(--primary-medium);
    background: var(--primary-medium);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
}

.courses-container {
    margin-bottom: 4rem;
}

.section-header {
    display: flex;
    justify-content: between;
    align-items: center;
    margin-bottom: 2rem;
}

.section-title {
    color: var(--primary-dark);
    font-size: 2rem;
    font-weight: bold;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-icon {
    color: var(--primary-medium);
    font-size: 1.75rem;
}

.courses-count {
    color: #64748b;
    font-size: 1rem;
    font-weight: 500;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.course-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 51, 102, 0.06);
    border: 1px solid rgba(51, 102, 153, 0.08);
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    position: relative;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 51, 102, 0.12);
    text-decoration: none;
    color: inherit;
}

.course-thumbnail {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-medium) 0%, var(--primary-dark) 100%);
    position: relative;
    overflow: hidden;
}

.course-thumbnail::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }

    100% {
        transform: translateX(100%);
    }
}

.course-thumbnail-content {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    padding: 1.5rem;
    text-align: center;
}

.course-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.course-level {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-dark);
    padding: 0.375rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.course-content {
    padding: 2rem;
}

.course-header {
    margin-bottom: 1.5rem;
}

.course-title {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--primary-dark);
    margin-bottom: 0.75rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-description {
    color: #64748b;
    font-size: 0.9rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 1rem;
}

.course-instructor {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding: 0.75rem;
    background: #f8fafc;
    border-radius: 10px;
}

.instructor-avatar {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: cover;
    border: 2px solid white;
}

.instructor-info h6 {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-dark);
}

.instructor-info p {
    margin: 0;
    font-size: 0.8rem;
    color: #64748b;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid #f1f5f9;
}

.meta-left {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: #64748b;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.course-price {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--accent-green);
}

.course-price.free {
    color: var(--accent-green);
}

.course-badges {
    position: absolute;
    top: 1rem;
    left: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.course-badge {
    background: var(--accent-green);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 15px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.course-badge.featured {
    background: var(--accent-yellow);
    color: var(--primary-dark);
}

.course-badge.new {
    background: #ff6b6b;
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: #64748b;
}

.empty-state-icon {
    font-size: 4rem;
    color: #cbd5e1;
    margin-bottom: 1.5rem;
}

.empty-state h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.btn-primary-custom {
    background: var(--primary-medium);
    color: white;
    border: none;
    padding: 0.875rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary-custom:hover {
    background: var(--primary-dark);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(51, 102, 153, 0.25);
}

.pagination-container {
    display: flex;
    justify-content: center;
    margin-top: 3rem;
}

.pagination {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.pagination a,
.pagination span {
    padding: 0.75rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    color: var(--primary-dark);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.pagination a:hover {
    border-color: var(--primary-medium);
    background: var(--primary-medium);
    color: white;
    text-decoration: none;
}

.pagination .current {
    background: var(--primary-medium);
    color: white;
    border-color: var(--primary-medium);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-stats {
        gap: 2rem;
        flex-wrap: wrap;
    }

    .filters-section {
        margin: -1.5rem 0.5rem 2rem 0.5rem;
        padding: 1.5rem;
    }

    .filter-tabs {
        gap: 0.5rem;
    }

    .filter-tab {
        font-size: 0.8rem;
        padding: 0.5rem 1rem;
    }

    .courses-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .course-content {
        padding: 1.5rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .course-thumbnail {
        height: 160px;
    }

    .course-icon {
        font-size: 2.5rem;
    }
}