/* ═══════════════════════════════════════════════════════════════════
   Course Archive / Catalog Styles
   Blue theme: #2563eb / #1e40af
   Modeled after calculators-hub.css
   ═══════════════════════════════════════════════════════════════════ */

/* ===========================
   CSS Variables
   =========================== */
:root {
    --ca-primary: #2563eb;
    --ca-primary-dark: #1e40af;
    --ca-primary-light: #3b82f6;
    --ca-gradient: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    --ca-shadow: rgba(37, 99, 235, 0.15);
    --ca-text-dark: #1e293b;
    --ca-text-muted: #64748b;
    --ca-border: #e2e8f0;
    --ca-card-radius: 16px;
    --ca-transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===========================
   Animations
   =========================== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes gradientFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ===========================
   Page Wrapper
   =========================== */
.roc-course-archive {
    overflow-x: hidden;
}

/* ===========================
   Hero Section
   =========================== */
.roc-course-archive__hero {
    position: relative;
    padding: 80px 0 60px;
    overflow: hidden;
}

.roc-course-archive__hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(-45deg, #2563eb, #1e40af, #3b82f6, #1d4ed8);
    background-size: 400% 400%;
    animation: gradientFlow 15s ease infinite;
    z-index: -1;
}

.roc-course-archive__hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.roc-course-archive__hero .container {
    position: relative;
    z-index: 1;
}

.roc-course-archive__hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.roc-course-archive__title {
    font-size: 2.75rem;
    font-weight: 800;
    color: #ffffff !important;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.roc-course-archive__subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin: 0 0 48px;
    line-height: 1.7;
    text-align: center;
}

/* ===========================
   Filter Tabs
   =========================== */
.roc-course-archive__filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.roc-course-archive__filter {
    padding: 12px 24px;
    border-radius: 30px;
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: #1a1a1a;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--ca-transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

a.roc-course-archive__filter,
a.roc-course-archive__filter:link,
a.roc-course-archive__filter:visited {
    color: #1a1a1a;
    text-decoration: none;
}

a.roc-course-archive__filter:hover {
    color: #1a1a1a;
    text-decoration: none;
}

.roc-course-archive__filter:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.roc-course-archive__filter--active {
    background: white;
    color: var(--ca-primary-dark);
    border-color: white;
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

a.roc-course-archive__filter--active,
a.roc-course-archive__filter--active:link,
a.roc-course-archive__filter--active:visited {
    color: var(--ca-primary-dark);
}

.roc-course-archive__filter-count {
    background: rgba(0, 0, 0, 0.1);
    padding: 3px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 700;
}

.roc-course-archive__filter--active .roc-course-archive__filter-count {
    background: var(--ca-primary);
    color: white;
}

/* ===========================
   Card Grid Section
   =========================== */
.roc-course-archive__grid-section {
    padding: 40px 0 60px;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    min-height: 400px;
}

.roc-course-archive__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

/* ===========================
   Course Card
   =========================== */
.roc-course-card {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
    transition: var(--ca-transition);
}

.roc-course-card__link {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: #fff;
    border: 1px solid var(--ca-border);
    border-radius: var(--ca-card-radius);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: var(--ca-transition);
}

.roc-course-card__link:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
    border-color: var(--ca-primary-light);
    text-decoration: none;
    color: inherit;
}

/* ─── Card Image ──────────────────────────────────────────── */
.roc-course-card__image {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: #f1f5f9;
}

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

.roc-course-card__link:hover .roc-course-card__image img {
    transform: scale(1.05);
}

.roc-course-card__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
}

.roc-course-card__placeholder .dashicons {
    font-size: 48px;
    width: 48px;
    height: 48px;
    color: var(--ca-primary);
    opacity: 0.5;
}

.roc-course-card__badges {
    position: absolute;
    top: 12px;
    left: 12px;
    display: flex;
    gap: 6px;
    z-index: 1;
}

.roc-course-card__badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    backdrop-filter: blur(8px);
}

.roc-course-card__badge--category {
    background: rgba(255, 255, 255, 0.9);
    color: var(--ca-primary-dark);
}

.roc-course-card__overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.06), transparent);
    pointer-events: none;
}

/* ─── Card Body ───────────────────────────────────────────── */
.roc-course-card__body {
    padding: 20px 20px 12px;
    flex: 1;
}

.roc-course-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ca-text-dark);
    margin: 0 0 12px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.roc-course-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.roc-course-card__meta-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
    color: var(--ca-text-muted);
}

.roc-course-card__meta-item .dashicons {
    font-size: 14px;
    width: 14px;
    height: 14px;
}

/* ─── Card Footer ─────────────────────────────────────────── */
.roc-course-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px 16px;
    border-top: 1px solid var(--ca-border);
}

.roc-course-card__price {
    font-size: 1rem;
    font-weight: 700;
}

.roc-course-card__price--free {
    color: #059669;
}

.roc-course-card__price--paid {
    color: var(--ca-primary);
}

.roc-course-card__action {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ca-primary);
    transition: gap 0.2s ease;
}

.roc-course-card__link:hover .roc-course-card__action {
    gap: 8px;
}

.roc-course-card__action .dashicons {
    font-size: 14px;
    width: 14px;
    height: 14px;
}

/* ===========================
   Empty State
   =========================== */
.roc-course-archive__empty {
    text-align: center;
    padding: 60px 20px;
}

.roc-course-archive__empty-icon {
    margin-bottom: 20px;
}

.roc-course-archive__empty-icon .dashicons {
    font-size: 64px;
    width: 64px;
    height: 64px;
    color: var(--ca-border);
}

.roc-course-archive__empty-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--ca-text-dark);
    margin: 0 0 8px;
}

.roc-course-archive__empty-text {
    font-size: 1rem;
    color: var(--ca-text-muted);
    margin: 0 0 24px;
}

/* ===========================
   Responsive — Tablet (768px)
   =========================== */
@media (max-width: 768px) {
    .roc-course-archive__hero {
        padding: 50px 0 40px;
    }

    .roc-course-archive__title {
        font-size: 2rem;
    }

    .roc-course-archive__subtitle {
        font-size: 1rem;
        margin-bottom: 28px;
    }

    .roc-course-archive__grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .roc-course-archive__grid-section {
        padding: 24px 0 40px;
    }

    .roc-course-archive__filters {
        gap: 8px;
    }

    .roc-course-archive__filter {
        padding: 10px 18px;
        font-size: 0.85rem;
    }
}

/* ===========================
   Responsive — Small Mobile (576px)
   =========================== */
@media (max-width: 576px) {
    .roc-course-archive__hero {
        padding: 40px 0 32px;
    }

    .roc-course-archive__title {
        font-size: 1.75rem;
    }

    .roc-course-archive__filter {
        padding: 8px 14px;
        font-size: 0.8rem;
    }
}