/* catalog.css — Course Catalog Grid + Filter Styles */

/* How It Works (reused from courses.css) */
.how-it-works {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--card-background);
    border: 2px solid var(--border-color);
    border-radius: 12px;
}

.how-step {
    text-align: center;
    flex: 1;
    max-width: 220px;
}

.how-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 0.5rem;
}

.how-step h3 {
    font-family: 'Cinzel', serif;
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.how-step p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.how-arrow {
    font-size: 1.5rem;
    color: var(--secondary-color);
    flex-shrink: 0;
}

/* Filter Bar */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1.25rem 1.5rem;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-label {
    font-family: 'Cinzel', serif;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05rem;
    flex-shrink: 0;
}

.filter-pill {
    font-family: 'Crimson Text', serif;
    font-size: 0.9rem;
    padding: 0.3rem 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.filter-pill:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

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

.search-box {
    margin-left: auto;
    flex-shrink: 0;
}

.search-box input {
    font-family: 'Crimson Text', serif;
    font-size: 1rem;
    padding: 0.4rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: white;
    color: var(--text-primary);
    width: 220px;
    transition: border-color 0.2s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.search-box input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

/* Course Grid */
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.catalog-card {
    display: block;
    text-decoration: none;
    color: inherit;
    background: var(--card-background);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.75rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.catalog-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.catalog-card:hover {
    transform: translateY(-4px);
    border-color: var(--secondary-color);
    box-shadow: 0 8px 24px var(--shadow-medium);
}

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

.catalog-badge {
    display: inline-block;
    background: var(--accent-color);
    color: white;
    padding: 0.2rem 0.7rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03rem;
    margin-bottom: 0.75rem;
}

.catalog-title {
    font-family: 'Cinzel', serif;
    font-size: 1.2rem;
    color: var(--primary-color);
    margin: 0 0 0.5rem;
    line-height: 1.3;
}

.catalog-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0 0 1rem;
}

.catalog-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.catalog-sections {
    font-weight: 600;
    color: var(--primary-color);
}

.catalog-assets {
    color: var(--accent-color);
}

/* ─── Guest Author card variant ───────────────────────────
   Distinct navy + gold palette for externally-contributed courses.
   Used for AP_GOV (Betsy Stith) and any future guest authors. */
.catalog-card.guest {
    border-color: #1e3a5f;
    border-left-width: 4px;
    background: linear-gradient(135deg, var(--card-background) 0%, rgba(30, 58, 95, 0.04) 100%);
    padding-top: 2.5rem;
}

.catalog-card.guest::before {
    background: linear-gradient(90deg, #1e3a5f, #c19a3d);
    opacity: 0.9;
}

.catalog-card.guest:hover {
    border-color: #c19a3d;
    box-shadow: 0 8px 24px rgba(30, 58, 95, 0.25);
}

.catalog-card.guest .catalog-title {
    color: #1e3a5f;
}

.catalog-card.guest .catalog-badge {
    background: #1e3a5f;
}

.guest-badge {
    position: absolute;
    top: 0.6rem;
    right: 0.6rem;
    background: #c19a3d;
    color: #1e3a5f;
    font-family: 'Cinzel', serif;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04rem;
    padding: 0.22rem 0.65rem;
    border-radius: 20px;
    border: 1px solid rgba(30, 58, 95, 0.2);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    white-space: nowrap;
}

.catalog-empty {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: 3rem;
    grid-column: 1 / -1;
}

/* Tools Banner */
.tools-banner {
    margin-bottom: 3rem;
}

.tools-banner-link {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.25rem 2rem;
    background: var(--card-background);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.tools-banner-link:hover {
    border-color: var(--secondary-color);
    box-shadow: 0 4px 16px var(--shadow-medium);
    transform: translateY(-2px);
}

.tools-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.tools-text {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.tools-text strong {
    font-family: 'Cinzel', serif;
    font-size: 1.15rem;
    color: var(--primary-color);
}

.tools-sub {
    font-family: 'Crimson Text', serif;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.tools-arrow {
    margin-left: auto;
    font-size: 1.5rem;
    color: var(--secondary-color);
    flex-shrink: 0;
}

/* Theo Banner */
.theo-banner {
    margin-bottom: 1.5rem;
}

.theo-banner-link {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.25rem 2rem;
    background: var(--card-background);
    border: 2px solid #c8e6c9;
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.theo-banner-link:hover {
    border-color: #2e7d32;
    box-shadow: 0 4px 16px rgba(46, 125, 50, 0.15);
    transform: translateY(-2px);
}

.theo-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.theo-text {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.theo-text strong {
    font-family: 'Cinzel', serif;
    font-size: 1.15rem;
    color: #2e7d32;
}

.theo-sub {
    font-family: 'Crimson Text', serif;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.theo-arrow {
    margin-left: auto;
    font-size: 1.5rem;
    color: #2e7d32;
    flex-shrink: 0;
}

/* Pipeline Info */
.pipeline-info {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--card-background);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    text-align: center;
}

.pipeline-info h3 {
    font-family: 'Cinzel', serif;
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.pipeline-info p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 700px;
    margin: 0.5rem auto;
}

/* Back Link */
.back-link {
    display: inline-block;
    font-family: 'Crimson Text', serif;
    font-size: 1rem;
    color: var(--secondary-color);
    text-decoration: none;
    margin-bottom: 1.5rem;
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--secondary-color);
    border-radius: 6px;
    transition: all 0.3s ease;
}

.back-link:hover {
    background: var(--secondary-color);
    color: white;
}

/* CC license link */
.cc-link {
    color: var(--secondary-color);
    text-decoration: underline;
    text-decoration-style: dotted;
    transition: color 0.3s ease;
}

.cc-link:hover {
    color: white;
}

/* ═══════════════════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
    .how-it-works {
        flex-direction: column;
        gap: 1rem;
    }

    .how-arrow {
        transform: rotate(90deg);
    }

    .filter-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .search-box {
        margin-left: 0;
    }

    .search-box input {
        width: 100%;
    }

    .catalog-grid {
        grid-template-columns: 1fr;
    }
}