/* =====================================================
   AUTOBAHN-LEXIKON — Stylesheet v1.0
   Aesthetic: Precision German engineering — clean, 
   authoritative, road-sign clarity. Navy + Signal-Orange.
   ===================================================== */

:root {
    --ablx-navy:      #0a1628;
    --ablx-blue:      #1a3a6e;
    --ablx-mid-blue:  #2563ab;
    --ablx-accent:    #e85d04;
    --ablx-orange-lt: #fff3ed;
    --ablx-bg:        #f7f8fa;
    --ablx-surface:   #ffffff;
    --ablx-border:    #dde3ec;
    --ablx-text:      #1a1f2e;
    --ablx-muted:     #5a6478;
    --ablx-radius:    8px;
    --ablx-radius-lg: 14px;
    --ablx-shadow:    0 2px 12px rgba(10,22,40,.08);
    --ablx-shadow-md: 0 6px 24px rgba(10,22,40,.13);
    --ablx-font:      'Source Serif 4', Georgia, serif;
    --ablx-mono:      'IBM Plex Sans', system-ui, sans-serif;
}

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,wght@0,400;0,600;0,700;1,400&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

/* =====================================================
   OVERVIEW PAGE
   ===================================================== */

.ablx-overview {
    font-family: var(--ablx-mono);
    color: var(--ablx-text);
    max-width: 1100px;
    margin: 0 auto;
}

/* Archive header */
.ablx-archive-wrap {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px 60px;
}

.ablx-archive-header {
    text-align: center;
    padding: 48px 0 36px;
    border-bottom: 3px solid var(--ablx-border);
    margin-bottom: 36px;
}

.ablx-archive-header h1 {
    font-family: var(--ablx-font);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--ablx-navy);
    margin: 0 0 12px;
    letter-spacing: -.02em;
}

.ablx-archive-intro {
    font-size: 1.1rem;
    color: var(--ablx-muted);
    max-width: 680px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Search */
.ablx-search-wrap {
    position: relative;
    margin-bottom: 28px;
}

#ablx-search {
    width: 100%;
    padding: 14px 48px 14px 20px;
    font-size: 1.05rem;
    font-family: var(--ablx-mono);
    border: 2px solid var(--ablx-border);
    border-radius: var(--ablx-radius-lg);
    background: var(--ablx-surface);
    color: var(--ablx-text);
    box-shadow: var(--ablx-shadow);
    transition: border-color .2s, box-shadow .2s;
    box-sizing: border-box;
}

#ablx-search:focus {
    outline: none;
    border-color: var(--ablx-mid-blue);
    box-shadow: 0 0 0 4px rgba(37,99,171,.12), var(--ablx-shadow);
}

.ablx-search-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
    pointer-events: none;
}

/* Stats bar */
.ablx-stats {
    display: flex;
    gap: 24px;
    margin-bottom: 24px;
    font-size: .85rem;
    color: var(--ablx-muted);
    font-weight: 600;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.ablx-stats span::before {
    content: '✓ ';
    color: var(--ablx-accent);
}

/* Cluster navigation */
.ablx-cluster-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 40px;
}

.ablx-cluster-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-family: var(--ablx-mono);
    font-size: .88rem;
    font-weight: 600;
    border: 2px solid var(--ablx-border);
    border-radius: 100px;
    background: var(--ablx-surface);
    color: var(--ablx-muted);
    cursor: pointer;
    transition: all .18s;
}

.ablx-cluster-btn:hover,
.ablx-cluster-btn.active {
    border-color: var(--ablx-mid-blue);
    background: var(--ablx-blue);
    color: #fff;
}

.ablx-count {
    background: rgba(255,255,255,.2);
    border-radius: 100px;
    padding: 1px 7px;
    font-size: .78rem;
}

.ablx-cluster-btn:not(.active) .ablx-count {
    background: var(--ablx-bg);
    color: var(--ablx-muted);
}

/* Cluster sections */
.ablx-cluster-section {
    margin-bottom: 52px;
    transition: opacity .2s;
}

.ablx-cluster-section.ablx-hidden {
    display: none;
}

.ablx-cluster-header {
    margin-bottom: 20px;
}

.ablx-cluster-header h2 {
    font-family: var(--ablx-font);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--ablx-navy);
    margin: 0 0 6px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--ablx-border);
}

.ablx-cluster-desc {
    font-size: .92rem;
    color: var(--ablx-muted);
    margin: 8px 0 0;
    line-height: 1.6;
}

/* Cards grid */
.ablx-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.ablx-card {
    display: flex;
    flex-direction: column;
    padding: 20px 22px;
    background: var(--ablx-surface);
    border: 2px solid var(--ablx-border);
    border-radius: var(--ablx-radius-lg);
    text-decoration: none;
    color: var(--ablx-text);
    box-shadow: var(--ablx-shadow);
    transition: all .2s;
    position: relative;
    overflow: hidden;
}

.ablx-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--ablx-mid-blue), var(--ablx-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .25s;
}

.ablx-card:hover {
    border-color: var(--ablx-mid-blue);
    box-shadow: var(--ablx-shadow-md);
    transform: translateY(-2px);
}

.ablx-card:hover::before {
    transform: scaleX(1);
}

.ablx-card h3 {
    font-family: var(--ablx-font);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ablx-navy);
    margin: 0 0 8px;
}

.ablx-card p {
    font-size: .88rem;
    color: var(--ablx-muted);
    line-height: 1.6;
    margin: 0 0 14px;
    flex: 1;
}

.ablx-read-more {
    font-size: .82rem;
    font-weight: 700;
    color: var(--ablx-accent);
    letter-spacing: .02em;
    margin-top: auto;
}

/* A–Z index */
.ablx-az-section {
    margin-top: 52px;
    padding-top: 36px;
    border-top: 2px solid var(--ablx-border);
}

.ablx-az-section h2 {
    font-family: var(--ablx-font);
    font-size: 1.4rem;
    color: var(--ablx-navy);
    margin-bottom: 20px;
}

.ablx-az-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ablx-az-item {
    display: inline-block;
    padding: 6px 14px;
    background: var(--ablx-bg);
    border: 1px solid var(--ablx-border);
    border-radius: 6px;
    font-size: .88rem;
    font-weight: 500;
    color: var(--ablx-blue);
    text-decoration: none;
    transition: all .15s;
}

.ablx-az-item:hover {
    background: var(--ablx-blue);
    color: #fff;
    border-color: var(--ablx-blue);
}

/* Hidden by search */
.ablx-card.ablx-hidden {
    display: none;
}

/* =====================================================
   SINGLE TERM PAGE
   ===================================================== */

.ablx-single-wrap {
    max-width: 820px;
    margin: 0 auto;
    padding: 0 20px 60px;
    font-family: var(--ablx-mono);
}

/* Breadcrumb */
.ablx-breadcrumb {
    padding: 16px 0;
    font-size: .84rem;
    color: var(--ablx-muted);
    margin-bottom: 8px;
}

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

.ablx-breadcrumb a:hover {
    text-decoration: underline;
}

/* Article header */
.ablx-article-header {
    margin-bottom: 28px;
}

.ablx-cluster-badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--ablx-orange-lt);
    color: var(--ablx-accent);
    border: 1px solid var(--ablx-accent);
    border-radius: 100px;
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.ablx-article h1 {
    font-family: var(--ablx-font);
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 700;
    color: var(--ablx-navy);
    line-height: 1.2;
    letter-spacing: -.02em;
    margin: 0 0 8px;
}

.ablx-updated {
    display: block;
    font-size: .82rem;
    color: var(--ablx-muted);
}

/* Definition box */
.ablx-definition-box {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: linear-gradient(135deg, #eef3fb, #f4f7fe);
    border: 2px solid var(--ablx-mid-blue);
    border-radius: var(--ablx-radius-lg);
    padding: 22px 24px;
    margin-bottom: 36px;
    box-shadow: 0 4px 16px rgba(37,99,171,.1);
}

.ablx-def-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.ablx-def-text strong {
    display: block;
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--ablx-mid-blue);
    margin-bottom: 6px;
}

.ablx-def-text p {
    font-family: var(--ablx-font);
    font-size: 1.08rem;
    line-height: 1.7;
    color: var(--ablx-navy);
    margin: 0;
    font-weight: 400;
}

/* Content */
.ablx-content {
    font-family: var(--ablx-font);
    font-size: 1.05rem;
    line-height: 1.85;
    color: var(--ablx-text);
    margin-bottom: 40px;
}

.ablx-content h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--ablx-navy);
    margin: 36px 0 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--ablx-border);
}

.ablx-content p {
    margin: 0 0 18px;
}

.ablx-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-family: var(--ablx-mono);
    font-size: .9rem;
}

.ablx-content table th {
    background: var(--ablx-navy);
    color: #fff;
    padding: 10px 14px;
    text-align: left;
    font-weight: 600;
}

.ablx-content table td {
    padding: 9px 14px;
    border-bottom: 1px solid var(--ablx-border);
}

.ablx-content table tr:nth-child(even) td {
    background: var(--ablx-bg);
}

/* FAQ */
.ablx-faq-section {
    margin-bottom: 40px;
}

.ablx-faq-section h2 {
    font-family: var(--ablx-font);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--ablx-navy);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--ablx-border);
}

.ablx-faq-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ablx-faq-item {
    border: 2px solid var(--ablx-border);
    border-radius: var(--ablx-radius);
    overflow: hidden;
    transition: border-color .2s;
}

.ablx-faq-item[open] {
    border-color: var(--ablx-mid-blue);
}

.ablx-faq-item summary {
    padding: 14px 18px;
    font-weight: 600;
    font-size: .96rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--ablx-surface);
    color: var(--ablx-navy);
    user-select: none;
}

.ablx-faq-item summary::-webkit-details-marker { display: none; }

.ablx-faq-item summary::after {
    content: '+';
    font-size: 1.3rem;
    font-weight: 300;
    color: var(--ablx-mid-blue);
    transition: transform .2s;
}

.ablx-faq-item[open] summary::after {
    content: '−';
}

.ablx-faq-answer {
    padding: 14px 18px;
    background: var(--ablx-bg);
    border-top: 1px solid var(--ablx-border);
    font-family: var(--ablx-font);
    font-size: 1rem;
    line-height: 1.75;
    color: var(--ablx-text);
}

.ablx-faq-answer p { margin: 0; }

/* CTA Box */
.ablx-cta-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    background: linear-gradient(135deg, var(--ablx-navy), var(--ablx-blue));
    color: #fff;
    padding: 24px 28px;
    border-radius: var(--ablx-radius-lg);
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.ablx-cta-text strong {
    display: block;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.ablx-cta-text p {
    font-size: .88rem;
    opacity: .8;
    margin: 0;
}

.ablx-cta-btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--ablx-accent);
    color: #fff;
    border-radius: var(--ablx-radius);
    font-weight: 700;
    font-size: .9rem;
    text-decoration: none;
    white-space: nowrap;
    transition: background .2s, transform .15s;
}

.ablx-cta-btn:hover {
    background: #c74902;
    transform: translateY(-1px);
    color: #fff;
}

/* Related terms */
.ablx-related-section {
    margin-bottom: 40px;
}

.ablx-related-section h2 {
    font-family: var(--ablx-font);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--ablx-navy);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--ablx-border);
}

.ablx-related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 12px;
}

.ablx-related-card {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    background: var(--ablx-surface);
    border: 2px solid var(--ablx-border);
    border-radius: var(--ablx-radius);
    text-decoration: none;
    color: var(--ablx-text);
    transition: all .18s;
}

.ablx-related-card:hover {
    border-color: var(--ablx-mid-blue);
    background: #f0f5ff;
}

.ablx-related-icon {
    font-size: 1.4rem;
    flex-shrink: 0;
}

.ablx-related-card strong {
    display: block;
    font-size: .92rem;
    color: var(--ablx-navy);
    margin-bottom: 3px;
}

.ablx-related-card p {
    font-size: .82rem;
    color: var(--ablx-muted);
    margin: 0;
    line-height: 1.5;
}

/* Back link */
.ablx-back-link {
    padding-top: 24px;
    border-top: 1px solid var(--ablx-border);
}

.ablx-back-link a {
    color: var(--ablx-mid-blue);
    text-decoration: none;
    font-size: .9rem;
    font-weight: 600;
    transition: color .15s;
}

.ablx-back-link a:hover {
    color: var(--ablx-accent);
}

/* Inline card shortcode */
.ablx-inline-card {
    padding: 16px 20px;
    background: #f4f7fe;
    border-left: 4px solid var(--ablx-mid-blue);
    border-radius: 0 var(--ablx-radius) var(--ablx-radius) 0;
    margin: 20px 0;
    font-size: .95rem;
}

.ablx-inline-card strong {
    display: block;
    color: var(--ablx-navy);
    margin-bottom: 4px;
}

.ablx-inline-card p {
    color: var(--ablx-text);
    margin: 0 0 8px;
    line-height: 1.6;
}

.ablx-inline-card a {
    color: var(--ablx-accent);
    font-weight: 600;
    text-decoration: none;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */

@media (max-width: 700px) {
    .ablx-cards {
        grid-template-columns: 1fr;
    }
    .ablx-cta-box {
        flex-direction: column;
        text-align: center;
    }
    .ablx-related-grid {
        grid-template-columns: 1fr;
    }
    .ablx-definition-box {
        flex-direction: column;
    }
    .ablx-stats {
        flex-wrap: wrap;
        gap: 12px;
    }
    .ablx-cluster-nav {
        gap: 6px;
    }
    .ablx-cluster-btn {
        font-size: .8rem;
        padding: 6px 12px;
    }
}

@media (max-width: 480px) {
    .ablx-archive-header h1 { font-size: 1.8rem; }
    .ablx-article h1        { font-size: 1.7rem; }
    .ablx-single-wrap,
    .ablx-archive-wrap      { padding: 0 14px 40px; }
}

/* =====================================================
   PRINT
   ===================================================== */

@media print {
    .ablx-cluster-nav,
    .ablx-search-wrap,
    .ablx-cta-box,
    .ablx-back-link { display: none; }

    .ablx-definition-box {
        border: 1px solid #000;
        background: none;
        box-shadow: none;
    }
}

/* =====================================================
   DATA POINTS BOX
   ===================================================== */

.ablx-data-box {
    background: linear-gradient(135deg, #f0f7ee, #e8f5e4);
    border: 2px solid #3B6D11;
    border-radius: var(--ablx-radius-lg);
    padding: 20px 24px;
    margin-bottom: 32px;
}

.ablx-data-header {
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: #3B6D11;
    margin-bottom: 14px;
}

.ablx-data-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.ablx-data-list li {
    background: #fff;
    border: 1px solid #c0dd97;
    border-radius: var(--ablx-radius);
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.ablx-data-list li strong {
    font-size: 1.3rem;
    font-weight: 700;
    color: #27500A;
    font-family: var(--ablx-font);
    line-height: 1.1;
}

.ablx-data-list li span {
    font-size: .82rem;
    color: var(--ablx-muted);
    line-height: 1.4;
}

.ablx-data-list li cite {
    font-size: .72rem;
    font-style: normal;
    color: #639922;
    margin-top: 2px;
}

/* =====================================================
   AUTOBAHN LINKS SECTION
   ===================================================== */

.ablx-autobahn-section {
    margin-bottom: 32px;
}

.ablx-autobahn-section h2 {
    font-family: var(--ablx-font);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--ablx-navy);
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--ablx-border);
}

.ablx-autobahn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
}

.ablx-autobahn-card {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 14px;
    background: var(--ablx-navy);
    border-radius: var(--ablx-radius);
    text-decoration: none;
    transition: all .18s;
    position: relative;
    overflow: hidden;
}

.ablx-autobahn-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--ablx-accent);
}

.ablx-autobahn-card:hover {
    background: var(--ablx-blue);
    transform: translateY(-2px);
    box-shadow: var(--ablx-shadow-md);
}

.ablx-autobahn-label {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    font-family: var(--ablx-font);
}

.ablx-autobahn-desc {
    font-size: .78rem;
    color: rgba(255,255,255,.65);
    line-height: 1.4;
}

.ablx-autobahn-arrow {
    font-size: .85rem;
    color: var(--ablx-accent);
    margin-top: 4px;
    font-weight: 700;
}

@media (max-width: 700px) {
    .ablx-autobahn-grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    }
    .ablx-data-list {
        grid-template-columns: 1fr 1fr;
    }
}