/* ============================================
   SELLANTICA BLOG - Styles
   Ergänzend zu ../styles.css
   ============================================ */

/* --- Blog Overview Page --- */

.blog-hero {
    padding: 8rem 0 3rem;
    text-align: center;
    background: var(--bg-base);
}

.blog-hero .section-title {
    margin-bottom: 0.75rem;
}

.blog-hero .section-subtitle {
    margin: 0 auto 2rem;
}

/* Category Filter */
.blog-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 3rem;
}

.blog-filter-btn {
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--t-normal) var(--ease-out);
}

.blog-filter-btn:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.blog-filter-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--text-inverse);
}

/* Blog Grid */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
}

/* Blog Card */
.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    transition: all var(--t-normal) var(--ease-out);
    text-decoration: none;
    color: inherit;
    opacity: 0;
    transform: translateY(24px);
}

.blog-card.animated {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                border-color var(--t-normal) var(--ease-out),
                box-shadow var(--t-normal) var(--ease-out);
}

.blog-card:hover {
    transform: translateY(-3px);
    border-color: var(--border-accent);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.blog-card.hidden {
    display: none;
}

.blog-card-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 1rem;
    width: fit-content;
}

.blog-card-category.grundlagen {
    background: var(--accent-dim);
    color: var(--accent);
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.blog-card-category.optimierung {
    background: rgba(0, 230, 138, 0.12);
    color: var(--success);
    border: 1px solid rgba(0, 230, 138, 0.2);
}

.blog-card-category.strategie {
    background: var(--cta-dim);
    color: var(--cta);
    border: 1px solid rgba(247, 185, 40, 0.2);
}

.blog-card-category.praxis {
    background: rgba(245, 158, 11, 0.12);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.blog-card h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.35;
}

.blog-card-excerpt {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.65;
    flex: 1;
    margin-bottom: 1.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.blog-card-reading-time {
    color: var(--text-muted);
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.blog-card-arrow {
    color: var(--accent);
    font-size: 0.85rem;
    transition: transform var(--t-normal) var(--ease-out);
}

.blog-card:hover .blog-card-arrow {
    transform: translateX(4px);
}

/* --- Article Page --- */

.article-page {
    padding-top: 5rem;
    background: var(--bg-base);
    min-height: 100vh;
}

/* Breadcrumb */
.breadcrumb {
    padding: 1.5rem 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.breadcrumb a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--t-fast);
}

.breadcrumb a:hover {
    color: var(--accent);
}

.breadcrumb-separator {
    margin: 0 0.5rem;
    opacity: 0.5;
}

/* Article Layout */
.article-layout {
    display: grid;
    grid-template-columns: 1fr 260px;
    gap: 3rem;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
    align-items: start;
}

/* Article Content */
.article-content {
    max-width: 780px;
}

.article-header {
    margin-bottom: 2.5rem;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.article-reading-time {
    color: var(--text-muted);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.article-date {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.article-content h1 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.article-intro {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

/* Article Body */
.article-body h2 {
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 3vw, 1.65rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    line-height: 1.25;
    letter-spacing: -0.01em;
}

.article-body h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    line-height: 1.35;
}

.article-body p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.75;
    margin-bottom: 1.25rem;
}

.article-body ul,
.article-body ol {
    color: var(--text-secondary);
    padding-left: 1.5rem;
    margin-bottom: 1.25rem;
    line-height: 1.75;
}

.article-body li {
    margin-bottom: 0.5rem;
}

.article-body strong {
    color: var(--text-primary);
    font-weight: 600;
}

.article-body a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid rgba(0, 212, 255, 0.3);
    transition: border-color var(--t-fast);
}

.article-body a:hover {
    border-color: var(--accent);
}

/* Info Box (Tipps, Definitionen) */
.info-box {
    background: var(--bg-elevated);
    border-left: 3px solid var(--accent);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
}

.info-box.tip {
    border-left-color: var(--success);
}

.info-box.warning {
    border-left-color: var(--warning);
}

.info-box-title {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-box p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 0;
}

.info-box p:last-child {
    margin-bottom: 0;
}

/* CTA Box (Inline) */
.article-cta {
    background: linear-gradient(135deg, var(--bg-elevated), var(--bg-surface));
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin: 2.5rem 0;
    text-align: center;
}

.article-cta h3 {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.article-cta p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    font-size: 0.95rem;
}

.article-cta .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Table of Contents (Sidebar) */
.toc-sidebar {
    position: sticky;
    top: 6rem;
}

.toc {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.toc-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 1rem;
}

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

.toc-list li {
    margin-bottom: 0.4rem;
}

.toc-list a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    line-height: 1.5;
    display: block;
    padding: 0.3rem 0.75rem;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    transition: all var(--t-fast);
}

.toc-list a:hover {
    color: var(--text-primary);
    border-left-color: var(--border-hover);
}

.toc-list a.active {
    color: var(--accent);
    border-left-color: var(--accent);
    background: var(--accent-dim);
}

/* Related Articles */
.related-articles {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border);
}

.related-articles h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}

/* Article Table */
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
}

.article-body th,
.article-body td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.article-body th {
    color: var(--text-primary);
    font-weight: 600;
    font-family: var(--font-display);
    background: var(--bg-elevated);
}

.article-body tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* --- Blog Teaser on Homepage --- */

.blog-teaser {
    padding: 6rem 0;
}

.blog-teaser .section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.blog-teaser-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.blog-teaser-cta {
    text-align: center;
}

/* --- Responsive --- */

@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: 1fr;
    }

    .toc-sidebar {
        position: relative;
        top: 0;
        order: -1;
    }

    .toc {
        margin-bottom: 2rem;
    }
}

@media (max-width: 768px) {
    .blog-hero {
        padding: 7rem 0 2rem;
    }

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

    .blog-teaser-grid {
        grid-template-columns: 1fr;
    }

    .blog-card {
        padding: 1.5rem;
    }

    .article-content h1 {
        font-size: 1.75rem;
    }

    .article-cta {
        padding: 1.5rem;
    }

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

    .blog-filter {
        gap: 0.4rem;
    }

    .blog-filter-btn {
        padding: 0.4rem 1rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .article-layout {
        padding: 0 1rem;
    }
}

/* Print */
@media print {
    .toc-sidebar,
    .article-cta,
    .related-articles,
    .blog-filter {
        display: none;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .blog-card,
    .blog-card-arrow,
    .toc-list a {
        transition-duration: 0.01ms !important;
    }

    .blog-card {
        opacity: 1;
        transform: none;
    }
}