/**
 * Developer Flavor Theme - Frontend Styles
 * 
 * Production-ready styles that complement theme.json settings
 * for a world-class visual appearance and interactions.
 * 
 * @package Developer_Flavor
 * @version 2.0.0
 */

/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */
:root {
    --df-transition-fast: 150ms ease;
    --df-transition-normal: 250ms ease;
    --df-transition-slow: 400ms ease;
    --df-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --df-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --df-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --df-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --df-shadow-card: 0 2px 8px -2px rgb(0 0 0 / 0.08), 0 6px 20px -4px rgb(0 0 0 / 0.06);
    --df-shadow-card-hover: 0 8px 30px -4px rgb(0 0 0 / 0.12), 0 4px 12px -2px rgb(0 0 0 / 0.08);
}

/* ==========================================================================
   Global Styles
   ========================================================================== */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--wp--preset--color--primary);
    outline-offset: 2px;
}

/* Selection styles */
::selection {
    background-color: var(--wp--preset--color--primary);
    color: var(--wp--preset--color--base);
}

/* ==========================================================================
   Typography Enhancements
   ========================================================================== */
.wp-block-heading a,
h1 a, h2 a, h3 a, h4 a, h5 a, h6 a {
    text-decoration: none;
}

.wp-block-heading a:hover,
h1 a:hover, h2 a:hover, h3 a:hover, h4 a:hover, h5 a:hover, h6 a:hover {
    color: var(--wp--preset--color--primary);
}

/* ==========================================================================
   Course Card Styles
   ========================================================================== */
.course-card,
.course-card-v2 {
    transition: transform var(--df-transition-normal), box-shadow var(--df-transition-normal);
    box-shadow: var(--df-shadow-card);
    overflow: hidden;
}

.course-card:hover,
.course-card-v2:hover {
    transform: translateY(-6px);
    box-shadow: var(--df-shadow-card-hover);
}

.course-card .wp-block-post-featured-image img,
.course-card-v2 .wp-block-post-featured-image img {
    transition: transform var(--df-transition-slow);
    object-fit: cover;
}

.course-card:hover .wp-block-post-featured-image img,
.course-card-v2:hover .wp-block-post-featured-image img {
    transform: scale(1.08);
}

.course-card .wp-block-post-featured-image,
.course-card-v2 .wp-block-post-featured-image {
    overflow: hidden;
}

/* Course card meta icons */
.course-card-v2 .meta-icon {
    color: var(--wp--preset--color--muted);
    flex-shrink: 0;
}

.course-card-v2 .meta-item {
    gap: 6px !important;
    align-items: center;
}

/* Star rating icon */
.course-card-v2 .star-icon {
    flex-shrink: 0;
}

.course-card-v2 .rating-badge {
    gap: 4px !important;
    align-items: center;
}

/* ==========================================================================
   Subject Card Styles - SVG Icons
   ========================================================================== */
.subject-card {
    transition: transform var(--df-transition-normal), box-shadow var(--df-transition-normal), border-color var(--df-transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.subject-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--df-shadow-lg);
}

.subject-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--wp--preset--color--primary), var(--wp--preset--color--accent));
    opacity: 0;
    transition: opacity var(--df-transition-normal);
}

.subject-card:hover::before {
    opacity: 1;
}

/* Subject icon container */
.subject-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 16px;
    margin-bottom: 0.5rem;
    transition: transform var(--df-transition-normal), box-shadow var(--df-transition-normal);
}

.subject-card:hover .subject-icon {
    transform: scale(1.1);
}

/* Subject icon color variants */
.subject-icon--code {
    background: linear-gradient(135deg, #E0F2FE 0%, #BAE6FD 100%);
    color: #0284C7;
}

.subject-icon--data {
    background: linear-gradient(135deg, #F0FDF4 0%, #BBF7D0 100%);
    color: #16A34A;
}

.subject-icon--business {
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    color: #D97706;
}

.subject-icon--design {
    background: linear-gradient(135deg, #FCE7F3 0%, #FBCFE8 100%);
    color: #DB2777;
}

.subject-icon--health {
    background: linear-gradient(135deg, #FEE2E2 0%, #FECACA 100%);
    color: #DC2626;
}

.subject-icon--science {
    background: linear-gradient(135deg, #E0E7FF 0%, #C7D2FE 100%);
    color: #4F46E5;
}

.subject-icon--mobile {
    background: linear-gradient(135deg, #F3E8FF 0%, #E9D5FF 100%);
    color: #9333EA;
}

.subject-icon--marketing {
    background: linear-gradient(135deg, #CCFBF1 0%, #99F6E4 100%);
    color: #0D9488;
}

.subject-icon svg {
    width: 32px;
    height: 32px;
}

/* Subject card headings */
.subject-card h3 {
    margin-top: 0.75rem !important;
}

.subject-card h3 a {
    text-decoration: none;
    color: inherit;
    transition: color var(--df-transition-fast);
}

.subject-card:hover h3 a {
    color: var(--wp--preset--color--primary);
}

/* ==========================================================================
   Provider Card Styles
   ========================================================================== */
.provider-card {
    transition: transform var(--df-transition-normal), box-shadow var(--df-transition-normal);
    box-shadow: var(--df-shadow-card);
    text-align: center;
}

.provider-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--df-shadow-card-hover);
}

.provider-card .wp-block-post-featured-image {
    margin: 0 auto;
}

.provider-card .wp-block-post-featured-image img {
    object-fit: contain !important;
    background: #fff;
}

/* ==========================================================================
   University Card Styles
   ========================================================================== */
.university-card {
    transition: transform var(--df-transition-normal), box-shadow var(--df-transition-normal), border-color var(--df-transition-normal);
    text-align: center;
}

.university-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--df-shadow-lg);
    border-color: var(--wp--preset--color--primary) !important;
}

.university-card .wp-block-post-featured-image {
    margin: 0 auto;
}

.university-card .wp-block-post-featured-image img {
    object-fit: cover !important;
    border: 3px solid var(--wp--preset--color--surface);
    transition: border-color var(--df-transition-normal);
}

.university-card:hover .wp-block-post-featured-image img {
    border-color: var(--wp--preset--color--primary);
}

.university-card .course-count-icon {
    color: var(--wp--preset--color--muted);
    flex-shrink: 0;
}

/* ==========================================================================
   Article Card Styles
   ========================================================================== */
.article-card {
    transition: transform var(--df-transition-normal), box-shadow var(--df-transition-normal);
    box-shadow: var(--df-shadow-card);
    overflow: hidden;
}

.article-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--df-shadow-card-hover);
}

.article-card .wp-block-post-featured-image img {
    transition: transform var(--df-transition-slow);
    object-fit: cover;
}

.article-card:hover .wp-block-post-featured-image img {
    transform: scale(1.08);
}

.article-card .wp-block-post-featured-image {
    overflow: hidden;
}

/* ==========================================================================
   Popular Tags in Hero
   ========================================================================== */
.popular-tag {
    margin: 0 !important;
}

.popular-tag a {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 100px;
    color: #fff !important;
    text-decoration: none;
    transition: all var(--df-transition-fast);
    backdrop-filter: blur(4px);
}

.popular-tag a:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-1px);
}

/* ==========================================================================
   Hero Search Box
   ========================================================================== */
.hero-search .wp-block-search__input {
    border: none;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    background: #fff;
    box-shadow: var(--df-shadow-md);
}

.hero-search .wp-block-search__input:focus {
    box-shadow: var(--df-shadow-lg), 0 0 0 3px rgba(0, 102, 204, 0.2);
}

.hero-search .wp-block-search__button {
    padding: 0.75rem 1.25rem;
    border-radius: 0 8px 8px 0 !important;
}

.hero-search .wp-block-search__button svg {
    width: 20px;
    height: 20px;
}

/* ==========================================================================
   Button Enhancements
   ========================================================================== */
.wp-block-button__link {
    transition: all var(--df-transition-fast);
}

.wp-block-button__link:hover {
    transform: translateY(-2px);
    box-shadow: var(--df-shadow-md);
}

.wp-block-button__link:active {
    transform: translateY(0);
}

/* Outline button hover */
.is-style-outline .wp-block-button__link:hover {
    background-color: var(--wp--preset--color--primary);
    color: var(--wp--preset--color--base);
    border-color: var(--wp--preset--color--primary);
}

/* ==========================================================================
   Navigation Styles
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--df-shadow-sm);
}

.wp-block-navigation-item__content {
    transition: color var(--df-transition-fast);
}

.wp-block-navigation-item__content:hover {
    color: var(--wp--preset--color--primary);
}

/* Mobile navigation overlay */
.wp-block-navigation__responsive-container.is-menu-open {
    animation: fadeIn var(--df-transition-normal);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ==========================================================================
   Search Enhancements
   ========================================================================== */
.wp-block-search__input {
    transition: border-color var(--df-transition-fast), box-shadow var(--df-transition-fast);
}

.wp-block-search__input:focus {
    border-color: var(--wp--preset--color--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.wp-block-search__button {
    transition: background-color var(--df-transition-fast);
}

.wp-block-search__button:hover {
    background-color: var(--wp--preset--color--secondary);
}

/* ==========================================================================
   Cover Block Enhancements
   ========================================================================== */
.wp-block-cover {
    overflow: hidden;
}

.wp-block-cover__background {
    transition: opacity var(--df-transition-slow);
}

/* ==========================================================================
   Post Terms (Tags/Categories)
   ========================================================================== */
.wp-block-post-terms a {
    text-decoration: none;
    transition: color var(--df-transition-fast);
}

.wp-block-post-terms a:hover {
    color: var(--wp--preset--color--secondary);
}

/* ==========================================================================
   Featured Image Enhancements
   ========================================================================== */
.wp-block-post-featured-image img {
    display: block;
    width: 100%;
    height: auto;
}

/* ==========================================================================
   Footer Styles
   ========================================================================== */
.site-footer a {
    transition: color var(--df-transition-fast);
}

.site-footer a:hover {
    color: var(--wp--preset--color--base);
}

.site-footer .wp-block-list {
    list-style: none;
    padding-left: 0;
}

.site-footer .wp-block-list li {
    margin-bottom: 0.5rem;
}

/* ==========================================================================
   Social Links
   ========================================================================== */
.wp-block-social-links .wp-social-link {
    transition: transform var(--df-transition-fast), opacity var(--df-transition-fast);
}

.wp-block-social-links .wp-social-link:hover {
    transform: translateY(-2px);
    opacity: 0.8;
}

/* ==========================================================================
   Pagination Styles
   ========================================================================== */
.wp-block-query-pagination {
    gap: 0.5rem;
}

.wp-block-query-pagination-numbers .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 0.75rem;
    border-radius: 8px;
    text-decoration: none;
    transition: all var(--df-transition-fast);
}

.wp-block-query-pagination-numbers .page-numbers:hover,
.wp-block-query-pagination-numbers .page-numbers.current {
    background-color: var(--wp--preset--color--primary);
    color: var(--wp--preset--color--base);
}

/* ==========================================================================
   Form Styles
   ========================================================================== */
input[type="text"],
input[type="email"],
input[type="url"],
input[type="password"],
input[type="search"],
textarea,
select {
    border: 1px solid var(--wp--preset--color--light);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    transition: border-color var(--df-transition-fast), box-shadow var(--df-transition-fast);
    width: 100%;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="url"]:focus,
input[type="password"]:focus,
input[type="search"]:focus,
textarea:focus,
select:focus {
    border-color: var(--wp--preset--color--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

/* ==========================================================================
   Separator Styles
   ========================================================================== */
.wp-block-separator {
    border: none;
    border-top: 1px solid currentColor;
    opacity: 0.15;
}

.wp-block-separator.is-style-wide {
    opacity: 0.1;
}

/* ==========================================================================
   Quote Styles
   ========================================================================== */
.wp-block-quote {
    border-left: 4px solid var(--wp--preset--color--primary);
    padding-left: 1.5rem;
    font-style: italic;
}

.wp-block-quote cite {
    display: block;
    margin-top: 1rem;
    font-style: normal;
    font-weight: 600;
    color: var(--wp--preset--color--muted);
}

/* ==========================================================================
   Code Block Styles
   ========================================================================== */
.wp-block-code {
    background-color: var(--wp--preset--color--contrast);
    color: var(--wp--preset--color--base);
    border-radius: 8px;
    padding: 1.5rem;
    overflow-x: auto;
}

code {
    background-color: var(--wp--preset--color--light);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-size: 0.875em;
}

/* ==========================================================================
   Table Styles
   ========================================================================== */
.wp-block-table {
    border-collapse: collapse;
    width: 100%;
}

.wp-block-table th,
.wp-block-table td {
    border: 1px solid var(--wp--preset--color--light);
    padding: 0.75rem 1rem;
    text-align: left;
}

.wp-block-table th {
    background-color: var(--wp--preset--color--light);
    font-weight: 600;
}

.wp-block-table tr:hover td {
    background-color: rgba(243, 244, 246, 0.5);
}

/* ==========================================================================
   Loading States
   ========================================================================== */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.skeleton {
    background: linear-gradient(90deg, 
        var(--wp--preset--color--light) 25%, 
        rgba(255,255,255,0.5) 50%, 
        var(--wp--preset--color--light) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 4px;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ==========================================================================
   Responsive Utilities
   ========================================================================== */
@media (max-width: 1024px) {
    /* 3-column grid to 2-column on tablet */
    .wp-block-query .wp-block-post-template.is-layout-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    /* Subject cards 2 per row on tablet */
    .wp-block-group.alignwide > .wp-block-group:has(.subject-card) {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (max-width: 781px) {
    .site-header {
        position: relative;
    }
    
    .wp-block-columns {
        flex-wrap: wrap;
    }
    
    .wp-block-column {
        flex-basis: 100% !important;
    }
    
    /* Single column on mobile */
    .wp-block-query .wp-block-post-template.is-layout-grid {
        grid-template-columns: 1fr !important;
    }
    
    /* Provider cards 2 per row on mobile */
    .wp-block-query:has(.provider-card) .wp-block-post-template.is-layout-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    /* Subject grid 2 columns on mobile */
    .wp-block-group.alignwide:has(.subject-card) {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    /* Reduce hero padding on mobile */
    .wp-block-cover.alignfull {
        min-height: 400px !important;
    }
    
    /* Smaller icons on mobile */
    .subject-icon {
        width: 56px;
        height: 56px;
    }
    
    .subject-icon svg {
        width: 28px;
        height: 28px;
    }
}

@media (max-width: 600px) {
    /* Single column subject cards on small mobile */
    .wp-block-group.alignwide:has(.subject-card) {
        grid-template-columns: 1fr !important;
    }
    
    /* Stack provider cards */
    .wp-block-query:has(.provider-card) .wp-block-post-template.is-layout-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 1rem !important;
    }
    
    .provider-card {
        padding: 1rem !important;
    }
    
    /* Smaller popular tags */
    .popular-tag a {
        padding: 0.25rem 0.625rem;
        font-size: 0.75rem;
    }
}

/* Hide on mobile */
@media (max-width: 600px) {
    .hide-on-mobile {
        display: none !important;
    }
}

/* Hide on desktop */
@media (min-width: 601px) {
    .hide-on-desktop {
        display: none !important;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
    .site-header,
    .site-footer,
    .wp-block-navigation,
    .wp-block-search,
    .wp-block-buttons {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    a {
        color: inherit;
        text-decoration: underline;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
    }
}

/* ==========================================================================
   Accessibility Enhancements
   ========================================================================== */
.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    word-wrap: normal !important;
}

.screen-reader-text:focus {
    background-color: var(--wp--preset--color--base);
    clip: auto !important;
    clip-path: none;
    color: var(--wp--preset--color--contrast);
    display: block;
    font-size: 1rem;
    height: auto;
    left: 5px;
    line-height: normal;
    padding: 15px 23px 14px;
    text-decoration: none;
    top: 5px;
    width: auto;
    z-index: 100000;
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    z-index: 999999;
    padding: 1rem 1.5rem;
    background-color: var(--wp--preset--color--primary);
    color: var(--wp--preset--color--base);
    text-decoration: none;
    transition: top var(--df-transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .course-card,
    .wp-block-group[style*="border"] {
        border-width: 2px !important;
    }
}

/* ==========================================================================
   Single Course Page Styles
   ========================================================================== */

/* Course meta items in hero */
.single-course-page .course-meta-item {
    gap: 8px !important;
    align-items: center !important;
}

.single-course-page .course-meta-item svg.meta-icon-light {
    flex-shrink: 0;
}

/* Enroll button hover effects */
.single-course-page .enroll-btn .wp-block-button__link:hover {
    background-color: #E65A2E !important;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px -5px rgba(255, 107, 53, 0.4);
}

.single-course-page .wishlist-btn .wp-block-button__link:hover {
    background-color: rgba(255, 255, 255, 0.15) !important;
}

/* Learning items grid */
.single-course-page .learning-item {
    gap: 12px !important;
    align-items: flex-start !important;
    padding: 0.5rem 0;
}

.single-course-page .learning-item .check-icon {
    flex-shrink: 0;
    margin-top: 2px;
}

/* Syllabus accordion styles */
.single-course-page .syllabus-item {
    transition: transform var(--df-transition-fast), box-shadow var(--df-transition-fast);
    cursor: pointer;
}

.single-course-page .syllabus-item:hover {
    transform: translateX(4px);
    box-shadow: var(--df-shadow-md);
}

/* Week badge */
.single-course-page .week-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    background: linear-gradient(135deg, var(--wp--preset--color--primary) 0%, #004BA0 100%);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Sidebar cards */
.single-course-page .course-sidebar-card {
    box-shadow: var(--df-shadow-lg);
    border: 1px solid var(--wp--preset--color--surface-alt);
}

.single-course-page .sticky-sidebar {
    position: sticky;
    top: 100px;
}

/* Detail rows in sidebar */
.single-course-page .detail-row {
    gap: 8px !important;
}

.single-course-page .detail-row .detail-icon {
    flex-shrink: 0;
    color: var(--wp--preset--color--muted);
}

/* Provider sidebar card */
.single-course-page .provider-sidebar-card {
    border: 1px solid var(--wp--preset--color--surface-alt);
}

.single-course-page .provider-logo-placeholder {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--wp--preset--color--surface);
    border-radius: 12px;
    flex-shrink: 0;
}

/* Subjects sidebar tags */
.single-course-page .subject-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.single-course-page .subject-tags a {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: var(--wp--preset--color--surface-alt);
    border-radius: 100px;
    text-decoration: none;
    font-weight: 500;
    transition: all var(--df-transition-fast);
}

.single-course-page .subject-tags a:hover {
    background: var(--wp--preset--color--primary);
    color: #fff;
}

/* Related courses section */
.single-course-page .wp-block-query .course-card-v2 {
    height: 100%;
}

/* Course section styling */
.single-course-page .course-section {
    position: relative;
}

.single-course-page .course-content {
    line-height: 1.8;
}

.single-course-page .course-content p {
    margin-bottom: 1.25rem;
}

.single-course-page .course-content h3,
.single-course-page .course-content h4 {
    margin-top: 2rem;
    margin-bottom: 1rem;
}

/* Responsive adjustments for single course */
@media (max-width: 1024px) {
    .single-course-page .sticky-sidebar {
        position: relative;
        top: 0;
    }
}

@media (max-width: 781px) {
    .single-course-page .wp-block-columns {
        flex-direction: column-reverse;
    }
    
    .single-course-page .course-meta-item {
        flex-wrap: wrap;
    }
    
    /* Show sidebar first on mobile */
    .single-course-page .wp-block-column:last-child {
        order: -1;
    }
    
    /* Adjust learning grid on mobile */
    .single-course-page .wp-block-group.is-layout-grid {
        grid-template-columns: 1fr !important;
    }
}

/* ==========================================================================
   Archive Course Page Styles
   ========================================================================== */
.archive-courses-page .filter-sidebar {
    position: sticky;
    top: 100px;
}

.archive-courses-page .filter-group {
    margin-bottom: 1.5rem;
}

.archive-courses-page .filter-group h4 {
    margin-bottom: 0.75rem;
    font-weight: 600;
}

/* Course grid on archive */
.archive-courses-page .courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

/* ==========================================================================
   Single Provider Page Styles
   ========================================================================== */
.single-provider-page .provider-hero-logo {
    width: 120px;
    height: 120px;
    border-radius: 20px;
    object-fit: contain;
    background: #fff;
    padding: 1rem;
    box-shadow: var(--df-shadow-lg);
}

.single-provider-page .provider-stats {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.single-provider-page .provider-stat {
    text-align: center;
}

.single-provider-page .provider-stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--wp--preset--color--primary);
}

.single-provider-page .provider-stat-label {
    font-size: 0.875rem;
    color: var(--wp--preset--color--muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   Single University Page Styles
   ========================================================================== */
.single-university-page .university-hero-logo {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--df-shadow-xl);
}

.single-university-page .university-badges {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.single-university-page .university-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0.375rem 0.875rem;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 100px;
    font-size: 0.875rem;
    color: #fff;
    backdrop-filter: blur(4px);
}

/* ==========================================================================
   Single Instructor Page Styles
   ========================================================================== */
.single-instructor-page .instructor-avatar {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #fff;
    box-shadow: var(--df-shadow-xl);
}

.single-instructor-page .instructor-social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.single-instructor-page .instructor-social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--wp--preset--color--surface);
    border-radius: 50%;
    color: var(--wp--preset--color--muted);
    transition: all var(--df-transition-fast);
}

.single-instructor-page .instructor-social-link:hover {
    background: var(--wp--preset--color--primary);
    color: #fff;
    transform: translateY(-2px);
}

/* ==========================================================================
   Single Article Page Styles
   ========================================================================== */
.single-article-page .article-hero {
    position: relative;
}

.single-article-page .article-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.single-article-page .article-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.single-article-page .article-author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.single-article-page .article-content {
    max-width: 720px;
    margin: 0 auto;
}

.single-article-page .article-content p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.single-article-page .article-content img {
    border-radius: 12px;
    margin: 2rem 0;
}

/* Article TOC */
.single-article-page .article-toc {
    position: sticky;
    top: 100px;
}

.single-article-page .article-toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.single-article-page .article-toc-list li {
    margin-bottom: 0.5rem;
}

.single-article-page .article-toc-list a {
    display: block;
    padding: 0.5rem 1rem;
    border-left: 2px solid var(--wp--preset--color--surface-alt);
    color: var(--wp--preset--color--muted);
    text-decoration: none;
    transition: all var(--df-transition-fast);
}

.single-article-page .article-toc-list a:hover,
.single-article-page .article-toc-list a.active {
    border-color: var(--wp--preset--color--primary);
    color: var(--wp--preset--color--primary);
    background: var(--wp--preset--color--surface);
}

/* ==========================================================================
   Archive Courses Filter Styles
   ========================================================================== */
.archive-courses-page .archive-hero-icon {
    opacity: 0.8;
}

.archive-courses-page .filter-sidebar {
    position: sticky;
    top: 100px;
}

.archive-courses-page .filter-group {
    margin-bottom: 0;
}

.archive-courses-page .filter-group h4 {
    margin: 0 !important;
}

.archive-courses-page .filter-options {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.archive-courses-page .filter-option {
    padding: 0.5rem 0.75rem;
    margin: 0 -0.75rem;
    border-radius: 8px;
    transition: background-color var(--df-transition-fast);
}

.archive-courses-page .filter-option:hover {
    background-color: var(--wp--preset--color--surface-alt);
}

.archive-courses-page .filter-option a {
    text-decoration: none;
    color: var(--wp--preset--color--contrast);
    transition: color var(--df-transition-fast);
}

.archive-courses-page .filter-option a:hover {
    color: var(--wp--preset--color--primary);
}

.archive-courses-page .filter-icon {
    color: var(--wp--preset--color--muted);
}

/* Sort bar */
.archive-courses-page .sort-bar {
    border: 1px solid var(--wp--preset--color--surface-alt);
}

.archive-courses-page .sort-dropdown {
    cursor: pointer;
    gap: 4px !important;
    align-items: center;
}

.archive-courses-page .sort-dropdown:hover {
    color: var(--wp--preset--color--primary);
}

/* Archive search box */
.archive-courses-page .archive-search .wp-block-search__input {
    padding: 1rem 1.5rem;
    font-size: 1rem;
}

/* Filter column responsive */
@media (max-width: 1024px) {
    .archive-courses-page .filter-sidebar {
        position: relative;
        top: 0;
    }
}

@media (max-width: 781px) {
    .archive-courses-page .filter-column {
        order: 2;
        flex-basis: 100% !important;
    }
    
    .archive-courses-page .wp-block-query .wp-block-post-template.is-layout-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (max-width: 600px) {
    .archive-courses-page .wp-block-query .wp-block-post-template.is-layout-grid {
        grid-template-columns: 1fr !important;
    }
    
    .archive-courses-page .sort-bar {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start !important;
    }
}

/* ==========================================================================
   Single Provider Page Enhanced Styles
   ========================================================================== */
.single-provider-page .provider-type-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0.375rem 0.875rem;
    background: rgba(147, 197, 253, 0.2);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #93C5FD;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.single-provider-page .provider-hero-logo-wrap {
    box-shadow: var(--df-shadow-lg);
}

.single-provider-page .provider-stats {
    gap: 2rem !important;
}

.single-provider-page .provider-stat-item {
    text-align: left;
}

.single-provider-page .provider-stat-item p {
    margin: 0 !important;
}

.single-provider-page .provider-stat-item .wp-block-group {
    gap: 8px !important;
}

.single-provider-page .provider-content {
    line-height: 1.8;
}

.single-provider-page .provider-content p {
    margin-bottom: 1.25rem;
}

/* Program cards */
.single-provider-page .program-card {
    transition: transform var(--df-transition-fast), box-shadow var(--df-transition-fast);
    cursor: pointer;
}

.single-provider-page .program-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--df-shadow-md);
}

/* Provider info card */
.single-provider-page .provider-info-card {
    border: 1px solid var(--wp--preset--color--surface-alt);
}

.single-provider-page .sticky-sidebar {
    position: sticky;
    top: 100px;
}

/* Responsive adjustments */
@media (max-width: 781px) {
    .single-provider-page .provider-stats {
        gap: 1.5rem !important;
    }
    
    .single-provider-page .provider-hero-logo-wrap {
        margin-bottom: 1.5rem;
    }
    
    .single-provider-page .sticky-sidebar {
        position: relative;
        top: 0;
    }
}


/* ==========================================================================
   Single University Page
   ========================================================================== */
.single-university-page .wp-block-cover {
    overflow: hidden;
}

.single-university-page .wp-block-cover__inner-container {
    max-width: 100%;
}

/* University logo in hero */
.university-logo-ring {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0.05) 100%);
    padding: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.university-logo-placeholder {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(255,255,255,0.95);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* University badges */
.university-badges {
    gap: 12px !important;
}

.uni-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255,255,255,0.1);
    border-radius: 30px;
    color: rgba(255,255,255,0.95);
    font-size: 0.85rem;
    font-weight: 500;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255,255,255,0.15);
    transition: all var(--df-transition-fast);
}

.uni-badge:hover {
    background: rgba(255,255,255,0.18);
    transform: translateY(-1px);
}

.uni-badge svg {
    opacity: 0.9;
}

/* Hero stats */
.uni-stat-hero {
    text-align: center;
    padding: 0 24px !important;
    position: relative;
}

.uni-stat-hero:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.2);
}

.uni-stat-hero p {
    margin: 0 !important;
}

/* University sections */
.uni-section h2 {
    position: relative;
    padding-bottom: 12px;
}

.uni-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--wp--preset--color--primary);
    border-radius: 3px;
}

.uni-content {
    color: var(--wp--preset--color--dark);
}

.uni-content p {
    margin-bottom: 1.25rem;
}

/* Program items grid */
.program-item {
    transition: transform var(--df-transition-fast), box-shadow var(--df-transition-fast);
    border: 1px solid var(--wp--preset--color--surface-alt);
}

.program-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--df-shadow-md);
}

/* Info card sidebar */
.uni-info-card {
    border: 1px solid var(--wp--preset--color--surface-alt);
}

.single-university-page .sticky-sidebar {
    position: sticky;
    top: 100px;
}

.info-list svg {
    flex-shrink: 0;
}

.info-list .wp-block-group .wp-block-group {
    gap: 10px !important;
}

/* Course cards in university */
.single-university-page .course-card-v2 {
    border: 1px solid var(--wp--preset--color--surface-alt);
    transition: transform var(--df-transition-fast), box-shadow var(--df-transition-fast);
}

.single-university-page .course-card-v2:hover {
    transform: translateY(-4px);
    box-shadow: var(--df-shadow-card-hover);
}

/* Responsive for university page */
@media (max-width: 781px) {
    .university-logo-ring {
        width: 100px;
        height: 100px;
    }
    
    .university-badges {
        flex-direction: column;
        align-items: center;
    }
    
    .uni-stat-hero {
        padding: 0 16px !important;
    }
    
    .uni-stat-hero:not(:last-child)::after {
        display: none;
    }
    
    .single-university-page .sticky-sidebar {
        position: relative;
        top: 0;
        margin-top: 2rem;
    }
}

/* ==========================================================================
   Archive Providers Page
   ========================================================================== */
.archive-providers-page .wp-block-cover,
.archive-universities-page .wp-block-cover {
    overflow: hidden;
}

/* Archive hero icon */
.archive-hero-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

/* Hero stat pills */
.hero-stat-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    color: rgba(255, 255, 255, 0.95);
    font-size: 0.85rem;
    font-weight: 500;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    margin: 4px;
    transition: all var(--df-transition-fast);
}

.hero-stat-pill:hover {
    background: rgba(255, 255, 255, 0.18);
}

.hero-stat-pill svg {
    opacity: 0.9;
}

/* Sort select wrapper */
.sort-select-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--wp--preset--color--surface);
    border-radius: 8px;
    border: 1px solid var(--wp--preset--color--surface-alt);
}

.sort-select {
    border: none;
    background: transparent;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--wp--preset--color--dark);
    cursor: pointer;
    outline: none;
    padding-right: 8px;
}

/* Provider card */
.provider-card {
    border: 1px solid var(--wp--preset--color--surface-alt);
    transition: transform var(--df-transition-fast), box-shadow var(--df-transition-fast);
    text-align: center;
}

.provider-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--df-shadow-card-hover);
}

.provider-logo-wrap {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--df-shadow-sm);
    border: 1px solid var(--wp--preset--color--surface-alt);
}

.provider-logo-wrap img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.provider-meta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--wp--preset--color--muted);
    font-size: 0.8rem;
}

.provider-tag {
    display: inline-block;
    padding: 4px 10px;
    background: var(--wp--preset--color--surface);
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--wp--preset--color--muted);
    margin: 2px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* ==========================================================================
   Archive Universities Page
   ========================================================================== */

/* Filter chips */
.filter-chips {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-chip {
    padding: 8px 16px;
    background: var(--wp--preset--color--surface);
    border: 1px solid var(--wp--preset--color--surface-alt);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--wp--preset--color--dark);
    cursor: pointer;
    transition: all var(--df-transition-fast);
}

.filter-chip:hover {
    border-color: var(--wp--preset--color--primary);
    color: var(--wp--preset--color--primary);
}

.filter-chip.active {
    background: var(--wp--preset--color--primary);
    border-color: var(--wp--preset--color--primary);
    color: white;
}

/* University card */
.university-card {
    border: 1px solid var(--wp--preset--color--surface-alt);
    transition: transform var(--df-transition-fast), box-shadow var(--df-transition-fast);
    text-align: center;
}

.university-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--df-shadow-card-hover);
}

.university-logo-wrap {
    width: 88px;
    height: 88px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--df-shadow-sm);
    border: 2px solid var(--wp--preset--color--surface-alt);
    background: white;
}

.university-logo-wrap img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.uni-location {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--wp--preset--color--muted);
    font-size: 0.75rem;
}

.uni-badge-sm {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    color: #92400E;
    margin: 2px;
}

.uni-courses-count {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--wp--preset--color--muted);
    font-size: 0.75rem;
    margin: 2px;
}

/* Ranking cards */
.ranking-card {
    border: 1px solid var(--wp--preset--color--surface-alt);
    transition: transform var(--df-transition-fast), box-shadow var(--df-transition-fast);
    cursor: pointer;
}

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

/* Responsive for archive pages */
@media (max-width: 781px) {
    .archive-hero-icon {
        width: 56px;
        height: 56px;
    }
    
    .hero-stat-pill {
        font-size: 0.8rem;
        padding: 6px 12px;
    }
    
    .filter-chips {
        width: 100%;
        justify-content: center;
        margin-top: 1rem;
    }
    
    .provider-card,
    .university-card {
        padding: 1.5rem 1rem !important;
    }
    
    .provider-logo-wrap {
        width: 64px;
        height: 64px;
    }
    
    .university-logo-wrap {
        width: 72px;
        height: 72px;
    }
}

/* ==========================================================================
   Single Instructor Page
   ========================================================================== */
.single-instructor-page .instructor-profile-card {
    border: 1px solid var(--wp--preset--color--surface-alt);
    box-shadow: var(--df-shadow-card);
}

.instructor-avatar-ring {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    padding: 5px;
    background: linear-gradient(135deg, var(--wp--preset--color--primary) 0%, var(--wp--preset--color--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.instructor-avatar-ring img {
    border: 4px solid white;
}

.instructor-affiliation {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--wp--preset--color--muted);
    font-size: 0.85rem;
}

.instructor-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--wp--preset--color--surface);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--wp--preset--color--dark);
    margin: 4px;
}

.instructor-social .wp-block-social-link {
    transition: transform var(--df-transition-fast);
}

.instructor-social .wp-block-social-link:hover {
    transform: translateY(-2px);
}

.instructor-stat-cell {
    text-align: center;
}

.stat-icon-mini {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--wp--preset--color--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.5rem;
}

.instructor-section h2 {
    position: relative;
    padding-bottom: 12px;
}

.instructor-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--wp--preset--color--secondary);
    border-radius: 3px;
}

.instructor-content {
    line-height: 1.8;
    color: var(--wp--preset--color--dark);
}

.instructor-content p {
    margin-bottom: 1.25rem;
}

.expertise-tags {
    gap: 10px !important;
}

.expertise-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: linear-gradient(135deg, var(--wp--preset--color--surface) 0%, var(--wp--preset--color--surface-alt) 100%);
    border-radius: 24px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--wp--preset--color--dark);
    border: 1px solid var(--wp--preset--color--surface-alt);
    transition: all var(--df-transition-fast);
}

.expertise-tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--df-shadow-sm);
    border-color: var(--wp--preset--color--primary);
}

.expertise-tag svg {
    color: var(--wp--preset--color--primary);
}

.achievement-card {
    border: 1px solid var(--wp--preset--color--surface-alt);
    transition: transform var(--df-transition-fast), box-shadow var(--df-transition-fast);
}

.achievement-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--df-shadow-md);
}

.achievement-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* ==========================================================================
   Archive Instructors Page
   ========================================================================== */
.instructor-card {
    border: 1px solid var(--wp--preset--color--surface-alt);
    transition: transform var(--df-transition-fast), box-shadow var(--df-transition-fast);
    text-align: center;
}

.instructor-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--df-shadow-card-hover);
}

.instructor-avatar-wrap {
    width: 98px;
    height: 98px;
    border-radius: 50%;
    padding: 4px;
    background: linear-gradient(135deg, var(--wp--preset--color--primary) 0%, var(--wp--preset--color--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.instructor-avatar-wrap img {
    border: 3px solid white;
}

.instructor-meta-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: var(--wp--preset--color--surface);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--wp--preset--color--dark);
    margin: 2px;
}

.instructor-institution {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--wp--preset--color--muted);
    font-size: 0.75rem;
}

/* Responsive for instructor pages */
@media (max-width: 781px) {
    .instructor-avatar-ring {
        width: 120px;
        height: 120px;
    }
    
    .instructor-avatar-wrap {
        width: 80px;
        height: 80px;
    }
    
    .instructor-stat-cell {
        margin-bottom: 1rem;
    }
    
    .expertise-tags {
        justify-content: center;
    }
    
    .instructor-card {
        padding: 1.5rem 1rem !important;
    }
}

/* ==========================================================================
   Featured Image Placeholders
   ========================================================================== */

/* Course card placeholder when no featured image */
.course-card-v2 .wp-block-post-featured-image:empty,
.course-card .wp-block-post-featured-image:empty,
.article-card .wp-block-post-featured-image:empty {
    background: linear-gradient(135deg, var(--wp--preset--color--primary) 0%, var(--wp--preset--color--secondary) 100%);
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.course-card-v2 .wp-block-post-featured-image:empty::before,
.course-card .wp-block-post-featured-image:empty::before,
.article-card .wp-block-post-featured-image:empty::before {
    content: '';
    display: block;
    width: 80px;
    height: 80px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.5)' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2 3h6a4 4 0 0 1 4 4v14a3 3 0 0 0-3-3H2z'/%3E%3Cpath d='M22 3h-6a4 4 0 0 0-4 4v14a3 3 0 0 1 3-3h7z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
}

/* Provider card placeholder */
.provider-card .wp-block-post-featured-image:empty {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--wp--preset--color--surface) 0%, var(--wp--preset--color--surface-alt) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.provider-card .wp-block-post-featured-image:empty::before {
    content: '';
    width: 36px;
    height: 36px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='36' height='36' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='3' width='18' height='18' rx='2' ry='2'/%3E%3Ccircle cx='8.5' cy='8.5' r='1.5'/%3E%3Cpolyline points='21 15 16 10 5 21'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
}

/* University card placeholder */
.university-card .wp-block-post-featured-image:empty {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #E0E7FF 0%, #C7D2FE 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.university-card .wp-block-post-featured-image:empty::before {
    content: '';
    width: 40px;
    height: 40px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 24 24' fill='none' stroke='%234F46E5' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M22 10v6M2 10l10-5 10 5-10 5z'/%3E%3Cpath d='M6 12v5c3 3 9 3 12 0v-5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
}

/* ==========================================================================
   Site Header Styles
   ========================================================================== */
.site-header {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    z-index: 1000;
}

.site-header.has-background {
    transition: box-shadow var(--df-transition-normal);
}

.site-logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.site-logo-icon {
    transition: transform var(--df-transition-fast);
}

.site-logo-link:hover .site-logo-icon {
    transform: scale(1.05);
}

/* Header search */
.header-search .wp-block-search__inside-wrapper {
    border: 1px solid var(--wp--preset--color--surface-alt);
    border-radius: 8px !important;
    transition: border-color var(--df-transition-fast), box-shadow var(--df-transition-fast);
}

.header-search .wp-block-search__inside-wrapper:focus-within {
    border-color: var(--wp--preset--color--primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.header-search .wp-block-search__input {
    border: none !important;
    padding: 8px 12px;
}

.header-search .wp-block-search__button {
    background: transparent !important;
    padding: 8px 12px;
    border-radius: 0 8px 8px 0 !important;
}

.header-search .wp-block-search__button svg {
    color: var(--wp--preset--color--muted);
}

.header-search .wp-block-search__button:hover svg {
    color: var(--wp--preset--color--primary);
}

/* Main navigation */
.main-navigation .wp-block-navigation__container {
    gap: 0.25rem;
}

.main-navigation .wp-block-navigation-link {
    transition: color var(--df-transition-fast);
}

.main-navigation .wp-block-navigation-link:hover {
    color: var(--wp--preset--color--primary);
}

.main-navigation .wp-block-navigation-item__content {
    padding: 0.5rem 0.875rem;
    border-radius: 6px;
    transition: background-color var(--df-transition-fast);
}

.main-navigation .wp-block-navigation-item__content:hover {
    background-color: var(--wp--preset--color--surface);
}

/* Submenu dropdown styles */
.main-navigation .wp-block-navigation-submenu__content {
    background: var(--wp--preset--color--base);
    border: 1px solid var(--wp--preset--color--surface-alt);
    border-radius: 12px;
    padding: 0.5rem;
    box-shadow: var(--df-shadow-lg);
    min-width: 200px;
}

.main-navigation .wp-block-navigation-submenu__content .wp-block-navigation-item__content {
    padding: 0.625rem 1rem;
    border-radius: 8px;
}

.main-navigation .wp-block-navigation-submenu__content .wp-block-navigation-item__content:hover {
    background-color: var(--wp--preset--color--surface);
}

/* ==========================================================================
   Site Footer Styles
   ========================================================================== */
.site-footer {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo-icon {
    flex-shrink: 0;
}

/* Footer navigation columns */
.footer-nav.is-vertical .wp-block-navigation-item {
    width: 100%;
}

.footer-nav .wp-block-navigation-item__content {
    padding: 0.25rem 0;
    transition: color var(--df-transition-fast), padding-left var(--df-transition-fast);
}

.footer-nav .wp-block-navigation-item__content:hover {
    color: var(--wp--preset--color--base) !important;
    padding-left: 0.5rem;
}

/* Footer social links */
.footer-social .wp-social-link {
    transition: transform var(--df-transition-fast), opacity var(--df-transition-fast);
}

.footer-social .wp-social-link:hover {
    transform: scale(1.15);
    opacity: 1 !important;
}

/* Footer legal navigation */
.footer-legal-nav .wp-block-navigation-item__content {
    transition: color var(--df-transition-fast);
}

.footer-legal-nav .wp-block-navigation-item__content:hover {
    color: var(--wp--preset--color--base) !important;
}

/* Footer separator */
.site-footer .wp-block-separator {
    opacity: 0.15;
}

/* ==========================================================================
   Subject Card Styles
   ========================================================================== */
.subject-card {
    transition: transform var(--df-transition-normal), box-shadow var(--df-transition-normal);
    cursor: pointer;
}

.subject-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--df-shadow-card-hover);
}

.subject-card h3 a {
    text-decoration: none;
    color: inherit;
}

.subject-card:hover h3 a {
    color: var(--wp--preset--color--primary);
}

/* Subject icons with unique colors */
.subject-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.subject-icon--code {
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    color: #4F46E5;
}

.subject-icon--data {
    background: linear-gradient(135deg, #F0FDF4 0%, #DCFCE7 100%);
    color: #16A34A;
}

.subject-icon--business {
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    color: #D97706;
}

.subject-icon--design {
    background: linear-gradient(135deg, #FCE7F3 0%, #FBCFE8 100%);
    color: #DB2777;
}

.subject-icon--health {
    background: linear-gradient(135deg, #FEE2E2 0%, #FECACA 100%);
    color: #DC2626;
}

.subject-icon--science {
    background: linear-gradient(135deg, #E0F2FE 0%, #BAE6FD 100%);
    color: #0284C7;
}

.subject-icon--mobile {
    background: linear-gradient(135deg, #F5F3FF 0%, #EDE9FE 100%);
    color: #7C3AED;
}

.subject-icon--marketing {
    background: linear-gradient(135deg, #ECFDF5 0%, #D1FAE5 100%);
    color: #059669;
}

/* ==========================================================================
   Popular Tags Styles
   ========================================================================== */
.popular-tag a {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    transition: background-color var(--df-transition-fast), transform var(--df-transition-fast);
}

.popular-tag a:hover {
    background: rgba(255, 255, 255, 0.25);
    color: #fff;
    transform: translateY(-2px);
}

/* ==========================================================================
   Responsive Header/Footer
   ========================================================================== */
@media (max-width: 991px) {
    .main-navigation {
        display: none;
    }
    
    .site-header .header-search {
        display: none;
    }
}

@media (max-width: 781px) {
    .site-footer .wp-block-columns {
        gap: 2rem;
    }
    
    .site-footer .wp-block-column:first-child {
        text-align: center;
    }
    
    .site-footer .footer-social {
        justify-content: center;
    }
    
    .subject-card {
        text-align: center;
    }
    
    .subject-icon {
        margin: 0 auto;
    }
}

/* ==========================================================================
   ENHANCED SEARCH STYLES
   ========================================================================== */

/* Archive page search - large prominent style */
.archive-search .wp-block-search,
.hero-section .wp-block-search {
    max-width: 700px;
    margin: 0 auto;
}

.archive-search .wp-block-search__inside-wrapper,
.hero-section .wp-block-search__inside-wrapper {
    background: var(--wp--preset--color--base, #fff);
    border-radius: 50px;
    overflow: hidden;
    box-shadow: 0 4px 20px -4px rgba(0, 0, 0, 0.15);
    transition: box-shadow var(--df-transition-normal);
}

.archive-search .wp-block-search__inside-wrapper:focus-within,
.hero-section .wp-block-search__inside-wrapper:focus-within {
    box-shadow: 0 8px 30px -4px rgba(0, 0, 0, 0.2), 0 0 0 3px rgba(0, 102, 204, 0.25);
}

.archive-search .wp-block-search__input,
.hero-section .wp-block-search__input {
    border: none !important;
    padding: 1rem 1.5rem !important;
    font-size: 1.0625rem;
    background: transparent;
    height: auto;
    min-height: 56px;
}

.archive-search .wp-block-search__input:focus,
.hero-section .wp-block-search__input:focus {
    outline: none;
    box-shadow: none !important;
}

.archive-search .wp-block-search__input::placeholder,
.hero-section .wp-block-search__input::placeholder {
    color: var(--wp--preset--color--muted, #6B7280);
}

.archive-search .wp-block-search__button,
.hero-section .wp-block-search__button {
    background: var(--wp--preset--color--primary, #0066CC) !important;
    color: #fff !important;
    border: none !important;
    padding: 0 1.5rem !important;
    margin: 0.375rem 0.375rem 0.375rem 0 !important;
    border-radius: 50px !important;
    min-width: 48px;
    min-height: 48px;
    transition: background-color var(--df-transition-fast), transform var(--df-transition-fast);
}

.archive-search .wp-block-search__button:hover,
.hero-section .wp-block-search__button:hover {
    background: var(--wp--preset--color--secondary, #0052A3) !important;
    transform: scale(1.05);
}

.archive-search .wp-block-search__button svg,
.hero-section .wp-block-search__button svg {
    width: 22px;
    height: 22px;
}

/* Header search - compact style */
.header-search .wp-block-search__inside-wrapper {
    background: var(--wp--preset--color--surface, #F3F4F6);
    border-radius: 8px;
    border: 1px solid transparent;
    transition: all var(--df-transition-fast);
}

.header-search .wp-block-search__inside-wrapper:focus-within {
    background: var(--wp--preset--color--base, #fff);
    border-color: var(--wp--preset--color--primary, #0066CC);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
}

.header-search .wp-block-search__input {
    border: none !important;
    background: transparent;
    padding: 0.5rem 0.75rem !important;
    font-size: 0.875rem;
}

.header-search .wp-block-search__button {
    background: transparent !important;
    border: none !important;
    padding: 0.5rem !important;
    color: var(--wp--preset--color--muted, #6B7280) !important;
}

.header-search .wp-block-search__button:hover {
    color: var(--wp--preset--color--primary, #0066CC) !important;
}

/* ==========================================================================
   FILTER SIDEBAR STYLES
   ========================================================================== */
.filter-sidebar,
.archive-filters {
    background: var(--wp--preset--color--base, #fff);
    border-radius: 16px;
    box-shadow: var(--df-shadow-card);
    padding: 1.5rem;
}

.filter-sidebar h3,
.archive-filters h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-sidebar h3 svg,
.archive-filters h3 svg {
    opacity: 0.6;
}

.filter-sidebar h4,
.archive-filters h4,
.filter-group-title {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--wp--preset--color--muted, #6B7280);
    margin: 1.25rem 0 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--wp--preset--color--surface-alt, #E5E7EB);
}

.filter-sidebar h4:first-child,
.archive-filters h4:first-child {
    margin-top: 0;
}

/* Filter items as styled links */
.filter-item,
.filter-sidebar a,
.archive-filters > div > a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.625rem 0.875rem;
    margin: 0.25rem 0;
    color: var(--wp--preset--color--dark, #1F2937);
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.9375rem;
    transition: all var(--df-transition-fast);
}

.filter-item:hover,
.filter-sidebar a:hover,
.archive-filters > div > a:hover {
    background: var(--wp--preset--color--surface, #F3F4F6);
    color: var(--wp--preset--color--primary, #0066CC);
}

.filter-item.active,
.filter-sidebar a.active,
.archive-filters > div > a.active {
    background: var(--wp--preset--color--primary, #0066CC);
    color: #fff;
}

/* Filter count badges */
.filter-count {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--wp--preset--color--muted, #6B7280);
    background: var(--wp--preset--color--surface, #F3F4F6);
    padding: 0.125rem 0.5rem;
    border-radius: 10px;
}

.filter-item:hover .filter-count,
.filter-sidebar a:hover .filter-count {
    background: var(--wp--preset--color--surface-alt, #E5E7EB);
}

.filter-item.active .filter-count {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

/* Clear filters button */
.clear-filters,
a[href*="clear"] {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    margin-top: 1rem;
    color: var(--wp--preset--color--muted, #6B7280);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid var(--wp--preset--color--surface-alt, #E5E7EB);
    border-radius: 6px;
    transition: all var(--df-transition-fast);
}

.clear-filters:hover,
a[href*="clear"]:hover {
    color: var(--wp--preset--color--error, #DC2626);
    border-color: var(--wp--preset--color--error, #DC2626);
    background: rgba(220, 38, 38, 0.05);
}

/* ==========================================================================
   COURSE RESULTS HEADER
   ========================================================================== */
.results-header,
.courses-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--wp--preset--color--surface-alt, #E5E7EB);
}

.results-count {
    font-size: 0.9375rem;
    color: var(--wp--preset--color--muted, #6B7280);
}

.results-count strong {
    color: var(--wp--preset--color--dark, #1F2937);
    font-weight: 600;
}

/* Sort dropdown styling */
.sort-dropdown,
select {
    appearance: none;
    background-color: var(--wp--preset--color--base, #fff);
    border: 1px solid var(--wp--preset--color--surface-alt, #E5E7EB);
    border-radius: 8px;
    padding: 0.5rem 2.5rem 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--wp--preset--color--dark, #1F2937);
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    transition: all var(--df-transition-fast);
}

.sort-dropdown:hover,
select:hover {
    border-color: var(--wp--preset--color--muted, #6B7280);
}

.sort-dropdown:focus,
select:focus {
    outline: none;
    border-color: var(--wp--preset--color--primary, #0066CC);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
}

/* ==========================================================================
   QUICK FILTER TAGS (Popular tags in heroes)
   ========================================================================== */
.quick-filters,
.filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 1.5rem;
}

.filter-chip,
.quick-filter {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50px;
    color: rgba(255, 255, 255, 0.95);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--df-transition-fast);
    backdrop-filter: blur(4px);
}

.filter-chip:hover,
.quick-filter:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    color: #fff;
    transform: translateY(-2px);
}

.filter-chip.active,
.quick-filter.active {
    background: rgba(255, 255, 255, 0.95);
    color: var(--wp--preset--color--primary, #0066CC);
    border-color: transparent;
}

/* Light background variant */
.filter-chips--light .filter-chip,
.quick-filters--light .quick-filter {
    background: var(--wp--preset--color--surface, #F3F4F6);
    border-color: var(--wp--preset--color--surface-alt, #E5E7EB);
    color: var(--wp--preset--color--dark, #1F2937);
}

.filter-chips--light .filter-chip:hover,
.quick-filters--light .quick-filter:hover {
    background: var(--wp--preset--color--primary, #0066CC);
    border-color: var(--wp--preset--color--primary, #0066CC);
    color: #fff;
}

/* ==========================================================================
   ENHANCED CARD IMAGE PLACEHOLDER
   ========================================================================== */
.lc-placeholder-image,
.wp-block-post-featured-image.lc-placeholder-image {
    position: relative;
    overflow: hidden;
}

.lc-placeholder-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255,255,255,0.08) 0%, transparent 40%);
    pointer-events: none;
}

.course-card-v2:hover .lc-placeholder-image svg {
    transform: scale(1.1);
    opacity: 0.7;
}

.lc-placeholder-image svg {
    transition: all var(--df-transition-slow);
    opacity: 0.5;
}

/* ==========================================================================
   PAGINATION STYLES
   ========================================================================== */
.wp-block-query-pagination {
    margin-top: 3rem;
    gap: 0.5rem;
}

.wp-block-query-pagination-numbers {
    display: flex;
    gap: 0.25rem;
}

.wp-block-query-pagination .page-numbers,
.wp-block-query-pagination-previous,
.wp-block-query-pagination-next {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 0.75rem;
    background: var(--wp--preset--color--base, #fff);
    border: 1px solid var(--wp--preset--color--surface-alt, #E5E7EB);
    border-radius: 8px;
    color: var(--wp--preset--color--dark, #1F2937);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--df-transition-fast);
}

.wp-block-query-pagination .page-numbers:hover,
.wp-block-query-pagination-previous:hover,
.wp-block-query-pagination-next:hover {
    background: var(--wp--preset--color--surface, #F3F4F6);
    border-color: var(--wp--preset--color--muted, #6B7280);
}

.wp-block-query-pagination .page-numbers.current {
    background: var(--wp--preset--color--primary, #0066CC);
    border-color: var(--wp--preset--color--primary, #0066CC);
    color: #fff;
}

.wp-block-query-pagination-previous,
.wp-block-query-pagination-next {
    font-size: 0.875rem;
}

/* ==========================================================================
   ARCHIVE PAGE LAYOUT IMPROVEMENTS
   ========================================================================== */
.archive-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 2rem;
    align-items: start;
}

.archive-layout .filter-sidebar {
    position: sticky;
    top: calc(var(--wp-admin--admin-bar--height, 0px) + 100px);
}

@media (max-width: 1024px) {
    .archive-layout {
        grid-template-columns: 1fr;
    }
    
    .archive-layout .filter-sidebar {
        position: static;
        margin-bottom: 1.5rem;
    }
}

/* ==========================================================================
   NO RESULTS STATE
   ========================================================================== */
.no-results,
.wp-block-query-no-results {
    text-align: center;
    padding: 4rem 2rem;
}

.no-results-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    padding: 1.5rem;
    background: var(--wp--preset--color--surface, #F3F4F6);
    border-radius: 50%;
    color: var(--wp--preset--color--muted, #6B7280);
}

.no-results h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.no-results p {
    color: var(--wp--preset--color--muted, #6B7280);
    max-width: 400px;
    margin: 0 auto;
}

/* ==========================================================================
   MOBILE RESPONSIVE ENHANCEMENTS
   ========================================================================== */
@media (max-width: 781px) {
    /* Search adjustments */
    .archive-search .wp-block-search__inside-wrapper,
    .hero-section .wp-block-search__inside-wrapper {
        border-radius: 12px;
    }
    
    .archive-search .wp-block-search__input,
    .hero-section .wp-block-search__input {
        padding: 0.875rem 1rem !important;
        font-size: 1rem;
        min-height: 48px;
    }
    
    .archive-search .wp-block-search__button,
    .hero-section .wp-block-search__button {
        padding: 0 1rem !important;
        min-width: 44px;
        min-height: 44px;
    }
    
    /* Filter chips scroll horizontally */
    .quick-filters,
    .filter-chips {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 0.5rem;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    
    .quick-filters::-webkit-scrollbar,
    .filter-chips::-webkit-scrollbar {
        display: none;
    }
    
    .filter-chip,
    .quick-filter {
        flex-shrink: 0;
    }
    
    /* Results header stack on mobile */
    .results-header,
    .courses-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    /* Course grid 2 columns on tablet */
    .wp-block-post-template.is-layout-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    /* Card adjustments */
    .course-card-v2 {
        border-radius: 12px;
    }
}

@media (max-width: 480px) {
    /* Single column on phone */
    .wp-block-post-template.is-layout-grid {
        grid-template-columns: 1fr !important;
    }
    
    /* Tighter spacing */
    .archive-search .wp-block-search__input {
        padding: 0.75rem !important;
    }
    
    .filter-sidebar,
    .archive-filters {
        padding: 1rem;
    }
    
    .filter-item,
    .filter-sidebar a {
        padding: 0.5rem 0.75rem;
    }
}