/* =============================================
   Courses Listing Page Styles
   ============================================= */

.courses-hero {
    background: var(--gradient-dark);
    padding: var(--space-16) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.courses-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(106,13,173,0.2) 0%, transparent 70%);
    border-radius: 50%;
}

.courses-hero h1 {
    color: white;
    margin-bottom: var(--space-4);
}

.courses-hero p {
    color: rgba(255,255,255,0.7);
    font-size: var(--text-lg);
    max-width: 600px;
    margin: 0 auto var(--space-8);
}

/* Search & Filters */
.courses-filters {
    background: white;
    padding: var(--space-6) 0;
    position: sticky;
    top: var(--nav-height);
    z-index: 50;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.courses-filters .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
}

.filter-tabs {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.filter-tab {
    padding: 8px 20px;
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    background: var(--gray-100);
    color: var(--gray-600);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

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

.filter-tab:hover:not(.active) {
    background: var(--gray-200);
    color: var(--dark);
}

.search-box {
    position: relative;
    min-width: 280px;
}

.search-box input {
    width: 100%;
    padding: 10px 16px 10px 40px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
}

.search-box input:focus {
    border-color: var(--purple);
    box-shadow: 0 0 0 3px rgba(106,13,173,0.1);
}

.search-box i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
}

/* Course Grid */
.courses-listing {
    padding: var(--space-10) 0 var(--space-16);
    background: var(--bg-light);
}

.courses-count {
    font-size: var(--text-sm);
    color: var(--gray-500);
    margin-bottom: var(--space-6);
}

.courses-count strong {
    color: var(--dark);
}

.all-courses-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-16) 0;
}

.no-results i {
    font-size: 3rem;
    color: var(--gray-300);
    margin-bottom: var(--space-4);
}

.no-results h3 {
    color: var(--gray-500);
    margin-bottom: var(--space-2);
}

@media (max-width: 1024px) {
    .all-courses-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .courses-filters .container {
        flex-direction: column;
    }
    
    .search-box {
        width: 100%;
        min-width: auto;
    }
    
    .filter-tabs {
        width: 100%;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: var(--space-2);
    }
    
    .filter-tab {
        flex-shrink: 0;
    }
    
    .all-courses-grid {
        grid-template-columns: 1fr;
    }
}