/* ===== Knowledge Base Styles ===== */

/* Breadcrumb */
.kb-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary, #64748B);
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.kb-breadcrumb a {
    color: var(--accent-primary, #2563EB);
    text-decoration: none;
    transition: color 0.2s;
}

.kb-breadcrumb a:hover {
    color: var(--accent-hover, #1D4ED8);
    text-decoration: underline;
}

.kb-breadcrumb .kb-sep {
    color: var(--text-tertiary, #94A3B8);
    user-select: none;
}

/* Product Section on Hub Page */
.kb-product-section {
    margin-bottom: 4rem;
}

.kb-product-section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary, #0F172A);
    margin-bottom: 0.5rem;
}

.kb-product-section .kb-product-desc {
    color: var(--text-secondary, #64748B);
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
    max-width: 640px;
}

/* Article Card Grid */
.kb-article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

@media (max-width: 992px) {
    .kb-article-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .kb-article-grid {
        grid-template-columns: 1fr;
    }
}

/* Article Card */
.kb-card {
    display: block;
    background: var(--bg-primary, #FFFFFF);
    border: 1px solid var(--border-color, #E2E8F0);
    border-radius: var(--radius-lg, 12px);
    padding: 1.5rem;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.kb-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--accent-primary, #2563EB);
}

.kb-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary, #0F172A);
    margin: 0 0 0.5rem;
}

.kb-card p {
    font-size: 0.9rem;
    color: var(--text-secondary, #64748B);
    line-height: 1.55;
    margin: 0;
}

.kb-card .kb-card-arrow {
    display: inline-block;
    margin-top: 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-primary, #2563EB);
}

/* Article Page Layout */
.kb-article {
    max-width: 860px;
    margin: 0 auto;
}

.kb-article-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary, #0F172A);
    margin-bottom: 0.75rem;
}

.kb-article-summary {
    font-size: 1.1rem;
    color: var(--text-secondary, #64748B);
    line-height: 1.6;
    margin-bottom: 2rem;
}

/* Video Embed */
.kb-video-wrap {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    margin-bottom: 2.5rem;
    border-radius: var(--radius-lg, 12px);
    overflow: hidden;
    background: #000;
}

.kb-video-wrap iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.kb-video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark, #0F172A);
    color: var(--text-on-dark, #F1F5F9);
    font-size: 1rem;
}

/* Content Sections */
.kb-section {
    margin-bottom: 2rem;
}

.kb-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary, #0F172A);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color, #E2E8F0);
}

.kb-content p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary, #0F172A);
    margin-bottom: 1rem;
}

.kb-content ul,
.kb-content ol {
    margin: 0.75rem 0 1rem 1.5rem;
    line-height: 1.7;
    color: var(--text-primary, #0F172A);
}

.kb-content li {
    margin-bottom: 0.35rem;
}

.kb-content code {
    background: var(--bg-secondary, #F1F5F9);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: 'Consolas', 'Courier New', monospace;
    color: var(--accent-primary, #2563EB);
}

.kb-content strong {
    font-weight: 600;
    color: var(--text-primary, #0F172A);
}

/* Related Articles */
.kb-related {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color, #E2E8F0);
}

.kb-related h2 {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--text-primary, #0F172A);
    margin-bottom: 1rem;
    padding-bottom: 0;
    border-bottom: none;
}

.kb-related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

@media (max-width: 768px) {
    .kb-related-grid {
        grid-template-columns: 1fr;
    }
}

.kb-related-card {
    display: block;
    padding: 1rem 1.25rem;
    background: var(--bg-secondary, #F1F5F9);
    border-radius: var(--radius-lg, 12px);
    text-decoration: none;
    transition: background 0.2s, transform 0.2s;
}

.kb-related-card:hover {
    background: var(--border-color, #E2E8F0);
    transform: translateY(-2px);
}

.kb-related-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary, #0F172A);
    margin: 0 0 0.25rem;
}

.kb-related-card p {
    font-size: 0.85rem;
    color: var(--text-secondary, #64748B);
    margin: 0;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 404 Fallback */
.kb-not-found {
    text-align: center;
    padding: 4rem 1rem;
}

.kb-not-found h1 {
    font-size: 2rem;
    color: var(--text-primary, #0F172A);
    margin-bottom: 0.5rem;
}

.kb-not-found p {
    color: var(--text-secondary, #64748B);
    margin-bottom: 1.5rem;
}

/* Screenshot in Article Sections */
.kb-screenshot {
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    border-radius: var(--radius-lg, 12px);
    overflow: hidden;
    border: 1px solid var(--border-color, #E2E8F0);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.kb-screenshot img {
    display: block;
    width: 100%;
    height: auto;
}

/* ===== KB Admin Styles ===== */
.kb-admin-section-block {
    background: var(--bg-secondary, #F8FAFC);
    border: 1px solid var(--border-color, #E2E8F0);
    border-radius: var(--radius, 8px);
    padding: 0.75rem;
    margin-bottom: 0.5rem;
}

.kb-admin-screenshot-preview {
    margin-bottom: 0.5rem;
}

.kb-admin-screenshot-preview img {
    max-width: 320px;
    max-height: 180px;
    border-radius: var(--radius, 8px);
    border: 1px solid var(--border-color, #E2E8F0);
    display: block;
    margin-bottom: 0.35rem;
}