/* Knowledge Base Styles */

/* Hero */
.knowledge-hero {
    padding: 8rem 0 4rem;
    text-align: center;
}

.knowledge-hero .hero-subtitle {
    text-align: center;
}

.breadcrumb {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.breadcrumb a {
    color: var(--accent-blue);
    text-decoration: none;
}

.breadcrumb span {
    margin: 0 0.5rem;
}

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

.stat {
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-blue);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* Filters */
.filters-section {
    padding: 2rem 0;
    background: var(--surface-card);
    border-bottom: 1px solid var(--surface-border);
}

.filters-wrapper {
    display: flex;
    gap: 2rem;
    align-items: center;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 300px;
}

.search-box ion-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 20px;
    color: var(--text-secondary);
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border: 1px solid var(--surface-border);
    border-radius: 0.5rem;
    background: var(--bg-main);
    color: var(--text-primary);
    font-size: 0.95rem;
}

.category-filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--surface-border);
    background: transparent;
    color: var(--text-secondary);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
    font-size: 0.875rem;
}

.filter-btn:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.filter-btn.active {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

/* Articles Grid */
.articles-section {
    padding: 4rem 0;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.article-card {
    background: var(--surface-card);
    border: 1px solid var(--surface-border);
    border-radius: 1rem;
    padding: 2rem;
    transition: all 0.3s;
    position: relative;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    border-color: var(--accent-blue);
}

.article-card.coming-soon {
    opacity: 0.7;
}

.coming-soon-overlay {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--accent-purple);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.article-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.article-card h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.article-card h2 a {
    color: var(--text-primary);
    text-decoration: none;
}

.article-card h2 a:hover {
    color: var(--accent-blue);
}

.article-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.article-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.article-meta ion-icon {
    font-size: 16px;
}

.article-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag {
    padding: 0.25rem 0.75rem;
    background: var(--bg-main);
    color: var(--text-secondary);
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Newsletter CTA */
.newsletter-cta {
    margin-top: 4rem;
}

.newsletter-card {
    background: linear-gradient(135deg, #1e3a8a 0%, #7c3aed 100%);
    padding: 3rem;
    border-radius: 1.5rem;
    text-align: center;
    color: white;
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.2);
}

.newsletter-card h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: 800;
    color: #ffffff;
}

.newsletter-card p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 2rem;
    line-height: 1.6;
    text-align: center;
}

.newsletter-form {
    display: flex;
    gap: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: 1rem 1.25rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.95);
    border-radius: 0.5rem;
    font-size: 1rem;
    color: #1e293b;
    transition: all 0.2s;
}

.newsletter-form input:focus {
    outline: none;
    border-color: #ffffff;
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.newsletter-form input::placeholder {
    color: #64748b;
}

.newsletter-form button {
    padding: 1rem 2rem;
    background: #ffffff;
    color: #1e3a8a;
    border: none;
    border-radius: 0.5rem;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.newsletter-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    background: #f1f5f9;
}

.newsletter-form button:active {
    transform: translateY(0);
}

.newsletter-form button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.newsletter-success,
.newsletter-error {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.95rem;
    font-weight: 500;
}

.newsletter-success {
    background: rgba(34, 197, 94, 0.2);
    color: #ffffff;
    border: 1px solid rgba(34, 197, 94, 0.4);
}

.newsletter-error {
    background: rgba(239, 68, 68, 0.2);
    color: #ffffff;
    border: 1px solid rgba(239, 68, 68, 0.4);
}

/* Responsive */
@media (max-width: 768px) {
    .knowledge-stats {
        gap: 1.5rem;
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    .filters-wrapper {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        min-width: auto;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
}