/* ═══════════════════════════════════════════════════
   BLOG.CSS — Ultra-modern blog design
   Magazine-style articles with sticky TOC sidebar
   KI Telefon Agent · Rebuild 2026
   ═══════════════════════════════════════════════════ */

/* ─── BLOG LISTING ─── */

.blog-hero {
    padding: 8rem 5% 3rem;
    text-align: center;
    background: linear-gradient(180deg, #ffffff 0%, var(--color-light) 100%);
}

.blog-hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: 0.75rem;
}

.blog-hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-slate);
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Filter */
.blog-filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 2.5rem;
}

.blog-filter-btn {
    padding: 0.5rem 1.25rem;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: var(--font-heading);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    background: var(--color-white);
    color: var(--color-slate);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

/* Blog Grid — magazine style */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.blog-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: all var(--transition-medium);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.blog-card-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.blog-card:hover .blog-card-img {
    transform: scale(1.03);
}

.blog-card-body {
    padding: 1.75rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.blog-card-category {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gold);
    background: var(--color-gold-bg);
    padding: 0.3rem 0.85rem;
    border-radius: var(--radius-full);
    margin-bottom: 0.75rem;
    width: fit-content;
}

.blog-card-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 0.75rem;
}

.blog-card-title a {
    color: var(--color-dark);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.blog-card-title a:hover {
    color: var(--color-gold);
}

.blog-card-excerpt {
    font-size: 0.9rem;
    color: var(--color-slate);
    line-height: 1.6;
    margin-bottom: 1rem;
    flex: 1;
}

.blog-card-footer {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.blog-card-author-img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.blog-card-meta {
    font-size: 0.8rem;
    color: var(--color-slate);
}

.blog-card-meta strong {
    color: var(--color-dark);
    font-weight: 600;
}

/* Featured / first post — full width */
.blog-card--featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.blog-card--featured .blog-card-img {
    height: 100%;
    min-height: 300px;
}

.blog-card--featured .blog-card-title {
    font-size: 1.5rem;
}

.blog-card--featured .blog-card-excerpt {
    font-size: 1rem;
}

/* ─── ARTICLE — Above the fold hero ─── */

.article-hero {
    padding: 8rem 5% 0;
    max-width: 900px;
    margin: 0 auto;
}

.article-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--color-slate);
    margin-bottom: 1.5rem;
}

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

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

.article-breadcrumb .sep {
    color: var(--color-border);
}

.article-hero .blog-card-category {
    margin-bottom: 1.25rem;
}

.article-hero h1 {
    font-size: clamp(2rem, 4.5vw, 3rem);
    line-height: 1.15;
    margin-bottom: 1.25rem;
    max-width: 800px;
}

.article-hero-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.article-hero-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.article-hero-author img {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-gold-border);
}

.article-hero-author-info {
    display: flex;
    flex-direction: column;
}

.article-hero-author-name {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--color-dark);
}

.article-hero-author-role {
    font-size: 0.75rem;
    color: var(--color-slate);
}

.article-hero-stats {
    display: flex;
    gap: 1.25rem;
    align-items: center;
}

.article-stat {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    color: var(--color-slate);
}

.article-stat svg {
    width: 14px;
    height: 14px;
    color: var(--color-gold);
}

/* Featured image — full bleed feel */
.article-featured {
    max-width: 900px;
    margin: 2.5rem auto 0;
    padding: 0 5%;
}

/* 21:9 cinematic featured image */
.article-featured img {
    width: 100%;
    aspect-ratio: 21 / 9;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

/* ─── ARTICLE BODY — Two column with TOC sidebar ─── */

/* Grid layout — NO align-items:start so sidebar stretches full height for sticky */
.article-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 3rem;
    max-width: 1060px;
    margin: 0 auto;
    padding: 3rem 5%;
}

/* ─── TABLE OF CONTENTS (Sidebar) ─── */

.toc-sidebar {
    position: relative;
}

.toc-inner {
    position: sticky;
    top: 80px;
}

.toc-label {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-gold);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.toc-label svg {
    width: 14px;
    height: 14px;
}

.toc-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    border-left: 2px solid var(--color-border);
    padding-left: 0;
}

.toc-link {
    display: block;
    font-size: 0.8rem;
    line-height: 1.4;
    color: var(--color-slate);
    text-decoration: none;
    padding: 0.4rem 0 0.4rem 1rem;
    border-left: 2px solid transparent;
    margin-left: -2px;
    transition: all var(--transition-fast);
}

.toc-link:hover {
    color: var(--color-dark);
}

.toc-link.active {
    color: var(--color-gold);
    border-left-color: var(--color-gold);
    font-weight: 600;
}

/* Progress indicator */
.toc-progress {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.toc-progress-label {
    font-size: 0.7rem;
    color: var(--color-slate);
    margin-bottom: 0.4rem;
}

.toc-progress-bar {
    height: 3px;
    background: var(--color-border);
    border-radius: 2px;
    overflow: hidden;
}

.toc-progress-fill {
    height: 100%;
    background: var(--color-gold);
    width: 0%;
    transition: width 0.15s linear;
    border-radius: 2px;
}

/* ─── ARTICLE CONTENT — rich typography ─── */

.article-content {
    max-width: 680px;
    min-width: 0;
}

.article-content > p:first-child {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--color-dark);
    font-weight: 400;
}

.article-content p {
    font-size: 1.05rem;
    line-height: 1.85;
    margin-bottom: 1.5rem;
    color: #374151;
}

.article-content h2 {
    font-size: 1.5rem;
    margin-top: 3rem;
    margin-bottom: 1rem;
    padding-top: 1rem;
    color: var(--color-dark);
    scroll-margin-top: 90px;
}

.article-content h3 {
    font-size: 1.15rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--color-dark);
}

.article-content strong {
    color: var(--color-dark);
    font-weight: 700;
}

.article-content a:not(.btn) {
    color: var(--color-gold);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color var(--transition-fast);
}

.article-content a:not(.btn):hover {
    color: var(--color-gold-light);
}

/* Lists */
.article-content ul,
.article-content ol {
    margin-bottom: 1.5rem;
    padding-left: 1.25rem;
}

.article-content ul { list-style: none; }
.article-content ol { list-style: decimal; }

.article-content ul li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.5rem;
    font-size: 1.05rem;
    line-height: 1.7;
    color: #374151;
}

.article-content ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 6px;
    height: 6px;
    background: var(--color-gold);
    border-radius: 50%;
}

.article-content ol li {
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 0.5rem;
    color: #374151;
}

/* Blockquote */
.article-content blockquote {
    position: relative;
    margin: 2.5rem 0;
    padding: 2rem 2rem 2rem 2.5rem;
    background: linear-gradient(135deg, var(--color-gold-bg) 0%, rgba(179, 154, 61, 0.03) 100%);
    border: none;
    border-left: 4px solid var(--color-gold);
    border-radius: var(--radius-md);
    font-style: normal;
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--color-dark);
}

.article-content blockquote::before {
    content: '\201C';
    position: absolute;
    top: -0.25rem;
    left: 0.75rem;
    font-size: 3.5rem;
    font-family: Georgia, serif;
    color: var(--color-gold);
    opacity: 0.3;
    line-height: 1;
}

/* Table */
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    font-size: 0.9rem;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 0 0 1px var(--color-border);
}

.article-content th {
    background: var(--color-dark);
    color: var(--color-white);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.85rem 1rem;
    text-align: left;
}

.article-content td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    color: #374151;
}

.article-content tr:last-child td {
    border-bottom: none;
}

.article-content tr:nth-child(even) td {
    background: var(--color-light);
}

/* ─── INLINE CTA (within article) ─── */

.article-inline-cta {
    margin: 3rem 0;
    padding: 2rem;
    background: linear-gradient(135deg, var(--color-dark) 0%, #1e293b 100%);
    border-radius: var(--radius-lg);
    color: var(--color-white);
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.article-inline-cta-icon {
    width: 56px;
    height: 56px;
    background: var(--color-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--color-white);
}

.article-inline-cta-icon svg {
    width: 24px;
    height: 24px;
}

.article-inline-cta-content h4 {
    color: var(--color-white);
    font-size: 1.05rem;
    margin-bottom: 0.25rem;
}

.article-inline-cta-content p {
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
    margin: 0 0 0.75rem;
    line-height: 1.5;
}

.article-inline-cta .btn {
    font-size: 0.85rem;
    padding: 0.6rem 1.5rem;
}

/* ─── AUTHOR BOX — premium style ─── */

.author-box {
    margin: 3rem 0;
    padding: 2rem;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

.author-box img {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--color-gold-border);
    flex-shrink: 0;
}

.author-box-info {
    flex: 1;
}

.author-box-name {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    color: var(--color-dark);
    margin-bottom: 0.15rem;
}

.author-box-role {
    font-size: 0.8rem;
    color: var(--color-gold);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.author-box-bio {
    font-size: 0.85rem;
    color: var(--color-slate);
    line-height: 1.5;
    margin: 0;
}

/* ─── ARTICLE BOTTOM CTA — conversion zone ─── */

.article-bottom-cta {
    margin: 3rem 0;
    padding: 2.5rem;
    background: linear-gradient(135deg, rgba(179, 154, 61, 0.08) 0%, rgba(179, 154, 61, 0.02) 100%);
    border: 1px solid var(--color-gold-border);
    border-radius: var(--radius-lg);
    text-align: center;
}

.article-bottom-cta h3 {
    font-size: 1.35rem;
    margin-bottom: 0.5rem;
}

.article-bottom-cta p {
    font-size: 1rem;
    color: var(--color-slate);
    margin-bottom: 1.25rem;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.article-bottom-cta .cta-features {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.article-bottom-cta .cta-feature {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-dark);
}

.article-bottom-cta .cta-feature svg {
    width: 16px;
    height: 16px;
    color: var(--color-gold);
}

/* ─── RELATED POSTS ─── */

.related-posts {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 5% 4rem;
}

.related-posts h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.related-posts .blog-grid {
    grid-template-columns: repeat(3, 1fr);
}

/* ─── MOBILE TOC (collapsible dropdown) ─── */

.toc-mobile {
    display: none;
    margin-bottom: 2rem;
}

.toc-mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.85rem 1.25rem;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--color-dark);
    cursor: pointer;
}

.toc-mobile-toggle svg {
    width: 18px;
    height: 18px;
    color: var(--color-gold);
    transition: transform var(--transition-fast);
}

.toc-mobile-toggle.open svg {
    transform: rotate(180deg);
}

.toc-mobile-list {
    display: none;
    flex-direction: column;
    gap: 0;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    padding: 0.5rem 0;
}

.toc-mobile-list.open {
    display: flex;
}

.toc-mobile-list .toc-link {
    padding: 0.5rem 1.25rem;
    border-left: none;
    margin-left: 0;
}

/* ─── RESPONSIVE ─── */

@media (max-width: 900px) {
    .article-layout {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .toc-sidebar {
        display: none;
    }

    .toc-mobile {
        display: block;
    }

    .article-content {
        max-width: 100%;
    }

    .article-inline-cta {
        flex-direction: column;
        text-align: center;
    }
}

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

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

    .blog-card--featured .blog-card-img {
        min-height: 200px;
    }

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

    .article-hero-meta {
        gap: 1rem;
    }

    .author-box {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .article-bottom-cta .cta-features {
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
    }

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

@media (max-width: 480px) {
    .article-hero {
        padding: 7rem 4% 0;
    }

    .article-layout {
        padding: 2rem 4%;
    }

    .article-content p,
    .article-content li {
        font-size: 1rem;
    }

    .article-content h2 {
        font-size: 1.3rem;
    }
}