:root {
    --gold: #c6a43f;
    --gold-light: #e2cf8c;
    --gold-dark: #9e7e2e;
    --charcoal: #1e2a3a;
    --slate: #334e68;
    --gray-bg: #faf9f7;
    --border-light: #edeae5;
    --shadow-sm: 0 8px 20px rgba(0, 0, 0, 0.03), 0 2px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 20px 35px -12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 30px 60px -15px rgba(0, 0, 0, 0.1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
body { font-family: 'Inter', sans-serif; background-color: #fff; color: var(--charcoal); line-height: 1.6; overflow-x: hidden; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }
a { color: var(--gold); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: var(--gold-dark); }
h1, h2, h3, h4 { font-family: 'Cormorant Garamond', serif; font-weight: 600; color: var(--charcoal); }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; border-radius: 50px; font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: all 0.3s ease; border: none; font-family: 'Inter', sans-serif; }
.btn-primary { background: linear-gradient(135deg, var(--gold) 0%, var(--gold-dark) 100%); color: white; box-shadow: 0 4px 15px rgba(198, 164, 63, 0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(198, 164, 63, 0.4); color: white; }
.btn-outline { background: transparent; border: 2px solid var(--gold); color: var(--gold); }
.btn-outline:hover { background: var(--gold); color: white; }

.section-header { text-align: center; margin-bottom: 48px; }
.section-title { font-size: 2.8rem; color: var(--charcoal); margin-bottom: 16px; letter-spacing: -0.5px; }
.section-subtitle { font-size: 1.15rem; color: var(--slate); max-width: 600px; margin: 0 auto; line-height: 1.7; }

.navbar { position: fixed; top: 0; left: 0; right: 0; background: rgba(255,255,255,0.97); backdrop-filter: blur(12px); z-index: 1000; border-bottom: 1px solid var(--border-light); }
.nav-container { display: flex; justify-content: space-between; align-items: center; padding: 16px 32px; max-width: 1280px; margin: 0 auto; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--charcoal); }
.logo:hover { color: var(--charcoal); }
.logo-icon { font-size: 1.8rem; color: var(--gold); }
.logo-text { font-family: 'Cormorant Garamond', serif; font-size: 1.5rem; font-weight: 700; line-height: 1.2; }
.logo-text span { display: block; font-size: 0.65rem; font-weight: 400; color: var(--slate); letter-spacing: 0.5px; font-family: 'Inter', sans-serif; text-transform: uppercase; }
.nav-links { display: flex; list-style: none; gap: 28px; align-items: center; }
.nav-links a { font-size: 0.9rem; font-weight: 500; color: var(--slate); padding: 8px 0; position: relative; }
.nav-links a:hover { color: var(--gold); }
.nav-links a.active { color: var(--gold); }
.menu-btn { display: none; background: none; border: none; font-size: 1.5rem; color: var(--charcoal); cursor: pointer; }
.mobile-menu { display: none; }

.detail-hero { padding: 140px 0 60px; background: linear-gradient(180deg, var(--gray-bg) 0%, #fff 100%); text-align: center; }
.detail-hero h1 { font-size: 3.5rem; margin-bottom: 12px; }
.detail-hero h1 .highlight { color: var(--gold); }
.detail-hero .hero-icon { font-size: 3rem; color: var(--gold); margin-bottom: 20px; }
.detail-hero p { font-size: 1.15rem; color: var(--slate); max-width: 600px; margin: 0 auto; line-height: 1.7; }
.breadcrumb { max-width: 1280px; margin: 0 auto; padding: 100px 32px 0; font-size: 0.9rem; color: var(--slate); }
.breadcrumb a { color: var(--gold); }
.breadcrumb span { color: var(--slate); }

.detail-content { padding: 60px 0; }
.detail-content .content-inner { max-width: 800px; margin: 0 auto; }
.detail-content h2 { font-size: 2.2rem; margin-bottom: 20px; margin-top: 40px; }
.detail-content h2:first-child { margin-top: 0; }
.detail-content h3 { font-size: 1.5rem; margin-bottom: 16px; margin-top: 32px; color: var(--gold-dark); }
.detail-content p { margin-bottom: 16px; color: var(--slate); font-size: 1.05rem; line-height: 1.8; }
.detail-content ul, .detail-content ol { margin-bottom: 20px; padding-left: 24px; color: var(--slate); }
.detail-content li { margin-bottom: 8px; line-height: 1.7; }

.grading-section { padding: 60px 0; background: var(--gray-bg); }
.grading-section .content-inner { max-width: 800px; margin: 0 auto; }
.grading-section h2 { font-size: 2.2rem; margin-bottom: 24px; }
.grading-table { width: 100%; border-collapse: collapse; border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-sm); }
.grading-table th { background: linear-gradient(135deg, var(--gold) 0%, var(--gold-dark) 100%); color: white; padding: 16px 20px; text-align: left; font-weight: 600; font-size: 0.95rem; }
.grading-table td { padding: 14px 20px; border-bottom: 1px solid var(--border-light); background: white; color: var(--slate); }
.grading-table tr:last-child td { border-bottom: none; }
.grading-table tr:hover td { background: #fdfcf9; }

.detail-faq { padding: 60px 0; }
.detail-faq .content-inner { max-width: 800px; margin: 0 auto; }
.detail-faq h2 { font-size: 2.2rem; margin-bottom: 24px; }
.faq-grid-detail { display: flex; flex-direction: column; gap: 12px; }
.faq-item-detail { background: white; border-radius: 12px; border: 1px solid var(--border-light); overflow: hidden; }
.faq-item-detail:hover { box-shadow: var(--shadow-sm); }
.faq-q { padding: 18px 22px; display: flex; justify-content: space-between; align-items: center; font-weight: 500; color: var(--charcoal); border: none; background: none; width: 100%; text-align: left; cursor: pointer; font-size: 1rem; font-family: 'Inter', sans-serif; }
.faq-q i { color: var(--gold); transition: transform 0.3s ease; flex-shrink: 0; margin-left: 16px; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease, padding 0.3s ease; padding: 0 22px; color: var(--slate); line-height: 1.7; }
.faq-a.open { max-height: 300px; padding: 0 22px 18px; }

.related-section { padding: 60px 0; background: var(--gray-bg); text-align: center; }
.related-section h2 { font-size: 2rem; margin-bottom: 32px; }
.related-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; max-width: 900px; margin: 0 auto; }
.related-item { display: flex; align-items: center; gap: 10px; padding: 16px 24px; background: white; border-radius: 12px; border: 1px solid var(--border-light); color: var(--charcoal); font-weight: 500; transition: all 0.3s ease; text-decoration: none; }
.related-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--gold-light); color: var(--gold); }
.related-item i { color: var(--gold); font-size: 1.2rem; }
.related-item .item-label { font-size: 0.8rem; color: var(--slate); font-weight: 400; }
.related-item .item-title { font-size: 0.95rem; }

footer { background: white; border-top: 1px solid var(--border-light); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand .logo-text { font-size: 1.8rem; margin-bottom: 12px; display: block; }
.footer-brand p { color: var(--slate); font-size: 0.9rem; line-height: 1.7; margin-bottom: 20px; max-width: 300px; }
.social-links { display: flex; gap: 12px; }
.social-links a { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--border-light); display: flex; align-items: center; justify-content: center; color: var(--slate); transition: all 0.3s ease; }
.social-links a:hover { border-color: var(--gold); color: var(--gold); transform: translateY(-2px); }
.footer-col h4 { font-family: 'Inter', sans-serif; font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 16px; color: var(--charcoal); }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { color: var(--slate); font-size: 0.9rem; display: flex; align-items: center; gap: 8px; }
.footer-col ul a:hover { color: var(--gold); }
.footer-col ul a i { font-size: 0.6rem; color: var(--gold-light); }
.footer-bottom { border-top: 1px solid var(--border-light); margin-top: 40px; padding: 24px 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { font-size: 0.85rem; color: var(--slate); }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-size: 0.85rem; color: var(--slate); }
.footer-links a:hover { color: var(--gold); }
.last-updated { text-align: center; padding: 12px 32px; font-size: 0.8rem; color: var(--slate); background: var(--gray-bg); }

@media (max-width: 768px) {
    .nav-links { display: none; }
    .menu-btn { display: block; }
    .mobile-menu { display: none; position: fixed; top: 70px; left: 0; right: 0; background: white; border-bottom: 1px solid var(--border-light); padding: 16px 32px; z-index: 999; }
    .mobile-menu.active { display: flex; flex-direction: column; gap: 12px; }
    .mobile-menu a { font-size: 1rem; color: var(--charcoal); padding: 8px 0; }
    .mobile-menu a:hover { color: var(--gold); }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .detail-hero h1 { font-size: 2.4rem; }
    .section-title { font-size: 2rem; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .grading-table { font-size: 0.85rem; }
    .grading-table th, .grading-table td { padding: 10px 12px; }
}