/* ============================================
   Fuhrmannsbriefe.de - Stylesheet
   Sammlung Herbert Hufnagel
   Historisch-elegant, warm, pergamentartig
   ============================================ */

/* --- CSS Variables --- */
:root {
    --color-bg: #faf6f0;
    --color-bg-dark: #f0e8d8;
    --color-bg-card: #fffdf8;
    --color-text: #3a2e1e;
    --color-text-light: #6b5d4d;
    --color-text-muted: #8a7b6a;
    --color-primary: #7a5c2e;
    --color-primary-dark: #5a4220;
    --color-primary-light: #a8884c;
    --color-accent: #b8963a;
    --color-accent-light: #d4b458;
    --color-gold: #c9a84c;
    --color-border: #d4c4a8;
    --color-border-light: #e8dcc8;
    --color-white: #ffffff;
    --color-error: #8b3a3a;
    --color-success: #3a6b3a;

    --font-serif: 'Cormorant Garamond', 'Georgia', 'Times New Roman', serif;
    --font-sans: 'Source Sans 3', 'Segoe UI', 'Helvetica Neue', sans-serif;

    --shadow-sm: 0 1px 3px rgba(58, 46, 30, 0.08);
    --shadow-md: 0 4px 12px rgba(58, 46, 30, 0.1);
    --shadow-lg: 0 8px 30px rgba(58, 46, 30, 0.12);
    --shadow-card: 0 2px 8px rgba(58, 46, 30, 0.06), 0 1px 2px rgba(58, 46, 30, 0.04);

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --transition: 0.25s ease;
    --container-max: 1200px;
    --container-narrow: 900px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

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

h1, h2, h3, h4, h5 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-primary-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

/* --- Layout --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 1.5rem;
}

main {
    flex: 1;
}

/* --- Navbar --- */
.navbar {
    background: rgba(250, 246, 240, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--color-primary-dark);
}

.navbar-logo {
    font-size: 1.8rem;
    color: var(--color-gold);
}

.navbar-title {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 700;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: 0.25rem;
}

.navbar-nav a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--color-text);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.navbar-nav a:hover,
.navbar-nav a.active {
    color: var(--color-primary);
    background: rgba(122, 92, 46, 0.08);
}

.navbar-lang {
    display: flex;
    gap: 0.25rem;
    border-left: 1px solid var(--color-border-light);
    padding-left: 1.5rem;
}

.lang-switch {
    display: block;
    padding: 0.35rem 0.6rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    letter-spacing: 0.05em;
}

.lang-switch:hover {
    color: var(--color-primary);
    background: rgba(122, 92, 46, 0.08);
}

.lang-switch.active {
    color: var(--color-white);
    background: var(--color-primary);
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.navbar-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition);
    border-radius: 1px;
}

/* --- Hero Section --- */
.hero {
    position: relative;
    padding: 6rem 0 5rem;
    background: linear-gradient(135deg, #5a4220 0%, #7a5c2e 30%, #8b6d3a 60%, #6b5030 100%);
    color: var(--color-white);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="400" height="400"><filter id="n"><feTurbulence type="fractalNoise" baseFrequency="0.8" numOctaves="4" stitchTiles="stitch"/></filter><rect width="400" height="400" filter="url(%23n)" opacity="0.06"/></svg>');
    opacity: 0.5;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to top, var(--color-bg), transparent);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-motto {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-style: italic;
    color: var(--color-accent-light);
    margin-bottom: 1rem;
    letter-spacing: 0.03em;
}

.hero h1 {
    font-size: 3.2rem;
    color: var(--color-white);
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 300;
    line-height: 1.8;
    max-width: 650px;
    margin: 0 auto 2.5rem;
}

/* --- Stats Bar --- */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-number {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-accent-light);
    display: block;
}

.stat-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 300;
    margin-top: 0.25rem;
}

/* --- Section Styles --- */
.section {
    padding: 5rem 0;
}

.section-alt {
    background: var(--color-bg-dark);
}

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

.section-header h2 {
    margin-bottom: 0.75rem;
}

.section-header p {
    color: var(--color-text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* --- Highlight Cards --- */
.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.highlight-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.highlight-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-gold), var(--color-accent-light));
}

.highlight-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border);
}

.highlight-card .card-year {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-gold);
    margin-bottom: 0.5rem;
}

.highlight-card .card-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.highlight-card .card-route {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.highlight-card .card-route .arrow {
    color: var(--color-gold);
}

.highlight-card .card-goods {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    font-style: italic;
}

.highlight-card .card-value {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
}

.highlight-card .card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-top: 1rem;
}

.highlight-card .card-link:hover {
    color: var(--color-accent);
}

/* --- CTA Boxes --- */
.cta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.cta-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
    transition: all var(--transition);
}

.cta-box:hover {
    box-shadow: var(--shadow-md);
}

.cta-box h3 {
    margin-bottom: 1rem;
}

.cta-box p {
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1.4;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

/* --- Collection Page --- */
.collection-controls {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.search-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.search-input {
    flex: 1;
    padding: 0.75rem 1rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-white);
    color: var(--color-text);
    transition: border-color var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(122, 92, 46, 0.1);
}

.filter-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-select {
    padding: 0.6rem 2rem 0.6rem 0.75rem;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-white);
    color: var(--color-text);
    cursor: pointer;
    appearance: none;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="8"><path d="M1 1l5 5 5-5" stroke="%236b5d4d" stroke-width="1.5" fill="none"/></svg>');
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    min-width: 180px;
}

.filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.results-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* --- Document Grid --- */
.doc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

.doc-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: all var(--transition);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

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

.doc-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.doc-card-date {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
}

.doc-card-collection {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    background: var(--color-bg-dark);
    color: var(--color-text-muted);
    white-space: nowrap;
}

.doc-card-route {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 0.5rem;
}

.doc-card-route .arrow {
    color: var(--color-gold);
    margin: 0 0.25rem;
}

.doc-card-type {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 0.25rem;
}

.doc-card-goods {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-style: italic;
}

.doc-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--color-border-light);
}

.doc-card-value {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
}

.doc-card-lang {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    padding: 0.15rem 0.5rem;
    border: 1px solid var(--color-border-light);
    border-radius: 4px;
}

/* --- Document Detail Page --- */
.doc-detail {
    padding: 3rem 0;
}

.doc-detail-header {
    margin-bottom: 2.5rem;
}

.doc-breadcrumb {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.doc-breadcrumb a {
    color: var(--color-text-muted);
}

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

.doc-detail-header h1 {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
}

.doc-detail-route {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.doc-detail-route .arrow {
    color: var(--color-gold);
    margin: 0 0.5rem;
}

.doc-detail-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.meta-section {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.meta-section h3 {
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-border-light);
}

.meta-table {
    width: 100%;
}

.meta-table tr {
    border-bottom: 1px solid var(--color-border-light);
}

.meta-table tr:last-child {
    border-bottom: none;
}

.meta-table th {
    text-align: left;
    padding: 0.6rem 1rem 0.6rem 0;
    font-weight: 500;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    white-space: nowrap;
    vertical-align: top;
    width: 140px;
}

.meta-table td {
    padding: 0.6rem 0;
    font-size: 0.95rem;
}

.download-section {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
}

.download-section h3 {
    margin-bottom: 1.25rem;
}

.download-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--transition);
}

.download-btn:hover {
    background: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.download-btn.secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.download-btn.secondary:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.doc-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border-light);
}

.doc-nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--color-text-light);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.doc-nav-link:hover {
    background: var(--color-bg-dark);
    color: var(--color-primary);
}

/* --- Map Page --- */
.map-page {
    padding: 2rem 0 4rem;
}

.map-page h1 {
    margin-bottom: 0.5rem;
}

.map-page .section-header {
    margin-bottom: 1.5rem;
}

.map-container {
    height: 600px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
}

#map {
    height: 100%;
    width: 100%;
}

.map-legend {
    display: flex;
    gap: 2rem;
    justify-content: center;
    padding: 1rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
}

.map-legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.map-legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.map-legend-dot.from { background: #c0392b; }
.map-legend-dot.to { background: #2980b9; }
.map-legend-line {
    width: 24px;
    height: 2px;
    background: var(--color-gold);
}

/* Leaflet Popup Styling */
.leaflet-popup-content {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    line-height: 1.5;
}

.leaflet-popup-content h4 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--color-primary-dark);
}

.leaflet-popup-content .popup-doc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.leaflet-popup-content .popup-doc-list li {
    padding: 0.35rem 0;
    border-bottom: 1px solid #eee;
}

.leaflet-popup-content .popup-doc-list li:last-child {
    border-bottom: none;
}

.leaflet-popup-content .popup-doc-list a {
    color: var(--color-primary);
    font-size: 0.85rem;
}

/* --- About Page --- */
.about-page {
    padding: 3rem 0 5rem;
}

.about-hero {
    text-align: center;
    margin-bottom: 4rem;
    padding: 3rem 0;
}

.about-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.about-hero p {
    font-size: 1.15rem;
    color: var(--color-text-light);
}

.about-section {
    margin-bottom: 3rem;
}

.about-section h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border-light);
}

.about-section p {
    color: var(--color-text-light);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.scope-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.scope-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    text-align: center;
}

.scope-item .scope-value {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary);
    display: block;
    margin-bottom: 0.25rem;
}

.scope-item .scope-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* --- Footer --- */
.footer {
    background: linear-gradient(135deg, #3a2e1e 0%, #4a3c28 100%);
    color: rgba(255, 255, 255, 0.8);
    padding: 3rem 0 2rem;
    margin-top: auto;
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.footer-logo {
    font-size: 2rem;
    color: var(--color-gold);
}

.footer-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-white);
}

.footer-subtitle {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--color-gold);
}

.footer-bottom {
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

/* --- No Results --- */
.no-results {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--color-text-muted);
}

.no-results p {
    font-size: 1.1rem;
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
    }

    .doc-detail-meta {
        grid-template-columns: 1fr;
    }

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

    .map-container {
        height: 450px;
    }

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

@media (max-width: 768px) {
    .navbar-toggle {
        display: flex;
    }

    .navbar-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border-light);
        box-shadow: var(--shadow-md);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1rem;
    }

    .navbar-menu.open {
        display: flex;
    }

    .navbar-nav {
        flex-direction: column;
        width: 100%;
    }

    .navbar-nav a {
        padding: 0.75rem 1rem;
    }

    .navbar-lang {
        border-left: none;
        border-top: 1px solid var(--color-border-light);
        padding-left: 0;
        padding-top: 1rem;
        justify-content: center;
    }

    .hero {
        padding: 4rem 0 3rem;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }

    .section {
        padding: 3rem 0;
    }

    .search-row {
        flex-direction: column;
    }

    .filter-row {
        flex-direction: column;
    }

    .filter-select {
        width: 100%;
        min-width: auto;
    }

    .results-info {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .download-links {
        flex-direction: column;
    }

    .doc-nav {
        flex-direction: column;
        gap: 1rem;
    }

    .map-legend {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }

    .map-container {
        height: 350px;
    }

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

/* --- Utility --- */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* --- Loading State --- */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--color-text-muted);
}

.loading::after {
    content: '';
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: 0.5rem;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* --- Print --- */
@media print {
    .navbar, .footer, .doc-nav, .download-section, .collection-controls {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .doc-detail-meta {
        grid-template-columns: 1fr;
    }
}