/* iBao Travel - Design System v2 */

:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #e0f2fe;
    --accent: #f59e0b;
    --text: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --bg: #ffffff;
    --bg-page: #f8fafc;
    --bg-card: #ffffff;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
    --transition: 0.2s ease;
    --max-width: 1200px;
    --content-width: 800px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: var(--bg-page);
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

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

/* ===== NAVBAR ===== */
.navbar {
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 0.875rem 0;
}

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

.logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    font-size: 1.4rem;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-xs);
    transition: all var(--transition);
}

.nav-links a:hover {
    color: var(--text);
    background: var(--bg-page);
}

/* ===== HERO ===== */
.hero {
    padding: 5rem 0 4rem;
    text-align: center;
    background: linear-gradient(180deg, #f0f9ff 0%, var(--bg-page) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 20%, rgba(14,165,233,0.06) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(245,158,11,0.04) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.4rem 1rem;
    border-radius: 999px;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.15;
    margin-bottom: 1rem;
    color: var(--text);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 2.5rem;
    line-height: 1.6;
}

/* ===== SECTION HEADERS ===== */
.section-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ===== DESTINATION CARDS ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

.dest-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    text-decoration: none;
    color: var(--text);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

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

.dest-card.coming-soon {
    opacity: 0.5;
    pointer-events: none;
}

.dest-card-flag {
    font-size: 2.5rem;
    line-height: 1;
}

.dest-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
}

.dest-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    flex: 1;
}

.dest-card-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-light);
}

.dest-card-badge {
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
}

.dest-card-badge.soon {
    background: #fef3c7;
    color: #92400e;
}

/* ===== CATEGORY CARDS ===== */
.cat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
}

.cat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    text-decoration: none;
    color: var(--text);
    text-align: center;
    transition: all var(--transition);
}

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

.cat-card-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.cat-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.cat-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===== GUIDE LIST (Destination Index) ===== */
.guide-list-grid {
    display: grid;
    gap: 0.75rem;
}

.guide-list-item {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.25rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text);
    transition: all var(--transition);
}

.guide-list-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
    color: var(--text);
}

.guide-list-icon {
    font-size: 1.75rem;
    flex-shrink: 0;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: var(--radius-xs);
}

.guide-list-text h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.guide-list-text p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* ===== ARTICLE PAGE ===== */
.article-header {
    padding: 3rem 0 2rem;
    background: linear-gradient(180deg, #f0f9ff 0%, var(--bg-page) 100%);
    border-bottom: 1px solid var(--border);
}

.article-header .container {
    max-width: var(--content-width);
}

.breadcrumb {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

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

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

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

.article-header h1 {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.article-meta-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: var(--bg-page);
    border: 1px solid var(--border);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.8rem;
}

/* Article Content */
.article-body {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
}

.article-body h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.015em;
    margin-top: 3rem;
    margin-bottom: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-light);
    scroll-margin-top: 5rem;
}

.article-body h2:first-child {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}

.article-body h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

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

.article-body ul, .article-body ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.article-body li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.article-body li strong { color: var(--text); }

/* Info / Warning Boxes */
.info-box {
    background: var(--primary-light);
    border: 1px solid #bae6fd;
    border-radius: var(--radius-sm);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

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

.warning-box {
    background: #fef3c7;
    border: 1px solid #fde68a;
    border-radius: var(--radius-sm);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

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

/* Table of Contents */
.toc {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    margin-bottom: 2.5rem;
}

.toc-title {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.toc ol {
    list-style: none;
    counter-reset: toc;
    padding: 0;
}

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

.toc li::before {
    content: counter(toc) ".";
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    margin-right: 0.5rem;
}

.toc a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition);
}

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

/* Tables */
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.925rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.article-body thead {
    background: var(--bg-page);
}

.article-body th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text);
    border-bottom: 2px solid var(--border);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

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

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

.article-body tbody tr:hover {
    background: var(--bg-page);
}

/* ===== RELATED GUIDES ===== */
.related-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.related-section h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    border: none;
    padding: 0;
    margin-top: 0;
}

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

.related-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--bg-page);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text);
    transition: all var(--transition);
}

.related-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
    color: var(--text);
}

.related-card-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.related-card h3 {
    font-size: 0.9rem;
    font-weight: 600;
}

.related-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--text);
    color: #cbd5e1;
    padding: 3rem 0 2rem;
    margin-top: 4rem;
}

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

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.6;
    margin-top: 0.75rem;
}

.footer h4 {
    color: #f1f5f9;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.footer ul {
    list-style: none;
}

.footer li {
    margin-bottom: 0.4rem;
}

.footer a {
    color: #94a3b8;
    font-size: 0.9rem;
    transition: color var(--transition);
}

.footer a:hover { color: #f1f5f9; }

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: #64748b;
}

/* ===== UTILITY ===== */
.section { padding: 4rem 0; }
.section-alt { background: var(--bg-page); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .hero-subtitle { font-size: 1rem; }
    .card-grid { grid-template-columns: 1fr; }
    .cat-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
    .article-header h1 { font-size: 1.75rem; }
    .guide-list-item { flex-direction: column; text-align: center; gap: 0.75rem; }
    .nav-links { gap: 0; }
    .nav-links a { padding: 0.5rem 0.5rem; font-size: 0.85rem; }
}

@media (max-width: 480px) {
    .cat-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr; }
}