:root {
            --bg-primary: #0a0a0a;
            --bg-secondary: #111111;
            --bg-card: #161616;
            --bg-card-hover: #1a1a1a;
            --gold: #d4a855;
            --gold-dim: #b8944a;
            --teal: #00d4aa;
            --text-primary: #ffffff;
            --text-secondary: #e0e0e0;
            --text-muted: #888888;
            --text-dim: #9a9a9a;
            --border: #222222;
            --border-light: #333333;
            --green: #22c55e;
            --red: #ef4444;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--bg-primary);
            color: var(--text-secondary);
            line-height: 1.6;
            font-size: 16px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        nav {
            position: fixed;
            top: 0; left: 0; right: 0;
            background: rgba(10, 10, 10, 0.95);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            padding: 0 24px;
        }

        .nav-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }

        .nav-logo { display: flex; align-items: center; text-decoration: none; }
        .nav-logo img { height: 44px; width: auto; }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: color 0.2s;
        }
        .nav-links a:hover { color: var(--text-primary); }

        .nav-cta {
            background: linear-gradient(135deg, var(--gold) 0%, #e8bc6a 50%, var(--gold) 100%);
            color: #000 !important;
            padding: 10px 24px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 14px;
            text-decoration: none;
            box-shadow: 0 2px 8px rgba(212, 168, 85, 0.3);
        }
        .nav-cta:hover {
            background: linear-gradient(135deg, #e8bc6a 0%, var(--gold) 50%, #e8bc6a 100%);
            transform: translateY(-1px);
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        .nav-hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 1px;
            transition: all 0.3s;
        }

        footer {
            padding: 60px 0 40px;
            border-top: 1px solid var(--border);
        }
        .footer-top {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 40px;
        }
        .footer-brand { max-width: 300px; }
        .footer-logo { margin-bottom: 16px; }
        .footer-logo img { height: 60px; width: auto; }
        .footer-brand p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }
        .footer-links { display: flex; gap: 48px; }
        .footer-column h3 { font-size: 14px; font-weight: 600; color: var(--text-primary); margin-bottom: 16px; }
        .footer-column ul { list-style: none; }
        .footer-column li { margin-bottom: 10px; }
        .footer-column a { font-size: 14px; color: var(--text-muted); text-decoration: none; transition: color 0.2s; }
        .footer-column a:hover { color: var(--text-primary); }
        .footer-bottom { padding-top: 32px; border-top: 1px solid var(--border); }
        .footer-disclaimers { font-size: 12px; color: var(--text-dim); line-height: 1.7; max-width: 800px; margin-bottom: 24px; }
        .footer-disclaimers p { margin-bottom: 8px; }
        .footer-copyright { font-size: 13px; color: var(--text-muted); }

        a { color: var(--gold); text-decoration: none; }
        a:hover { text-decoration: underline; }

        @media (max-width: 768px) {
            .nav-hamburger { display: flex; }
            .nav-links {
                display: none;
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(10, 10, 10, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px;
                border-bottom: 1px solid #333;
                gap: 16px;
            }
            .nav-links.open { display: flex; }
            .nav-links .nav-cta { text-align: center; }
            .footer-top { flex-direction: column; }
            .footer-links { flex-direction: column; gap: 32px; }
        }
    

        .page-content {
            padding: 100px 0 60px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-dim);
            margin-bottom: 32px;
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--text-primary); text-decoration: underline; }
        .breadcrumb .sep { color: var(--text-dim); }

        .coin-detail {
            display: grid;
            grid-template-columns: 340px 1fr;
            gap: 48px;
            align-items: start;
        }

        .coin-image-wrap {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 18px;
            display: flex;
            align-items: stretch;
            justify-content: stretch;
            min-height: 340px;
        }
        .coin-image-figure {
            width: 100%;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .coin-image-frame {
            flex: 1;
            min-height: 304px;
            border-radius: 14px;
            border: 1px solid var(--border-light);
            background:
                radial-gradient(circle at 20% 20%, rgba(255,255,255,0.06), transparent 32%),
                linear-gradient(180deg, rgba(255,255,255,0.02) 0%, rgba(0,0,0,0.08) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            padding: 18px;
        }
        .coin-reference-image {
            display: block;
            width: 100%;
            height: 100%;
            max-height: 304px;
            object-fit: contain;
            filter: drop-shadow(0 14px 28px rgba(0,0,0,0.28));
        }
        .coin-image-caption {
            font-size: 12px;
            color: var(--text-dim);
            line-height: 1.5;
            text-align: center;
        }
        .coin-reference-card {
            position: relative;
            width: 100%;
            border-radius: 14px;
            border: 1px solid var(--border-light);
            background:
                radial-gradient(circle at 50% 0%, var(--reference-accent-soft) 0%, transparent 38%),
                linear-gradient(180deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0.015) 100%);
            padding: 22px 18px 18px;
            overflow: hidden;
            box-shadow:
                inset 0 1px 0 rgba(255,255,255,0.03),
                0 24px 50px rgba(0,0,0,0.22);
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .coin-reference-card::before {
            content: "";
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle at center, rgba(255,255,255,0.03) 0 1px, transparent 1px 18px);
            opacity: 0.12;
            pointer-events: none;
        }
        .coin-reference-card::after {
            content: "";
            position: absolute;
            inset: -25% auto -30% -35%;
            width: 58%;
            background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.1) 45%, transparent 100%);
            opacity: 0.45;
            transform: rotate(18deg) translate3d(-180%, 0, 0);
            pointer-events: none;
            animation: referenceSweep 8s ease-in-out infinite;
        }
        .coin-reference-topline {
            position: relative;
            z-index: 1;
            font-size: 11px;
            font-weight: 700;
            letter-spacing: 0.16em;
            text-transform: uppercase;
            color: var(--reference-accent);
            margin-bottom: 22px;
        }
        .coin-reference-stage {
            position: relative;
            z-index: 1;
            margin-bottom: 20px;
            padding: 6px 0 2px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .coin-reference-stage::before {
            content: "";
            position: absolute;
            width: 270px;
            height: 270px;
            border-radius: 50%;
            background: radial-gradient(circle at center, var(--reference-accent-soft) 0%, transparent 68%);
            opacity: 0.6;
            filter: blur(16px);
            animation: referenceHaloPulse 6s ease-in-out infinite;
        }
        .coin-reference-orbit {
            position: absolute;
            border-radius: 50%;
            border: 1px solid rgba(255,255,255,0.08);
            pointer-events: none;
        }
        .coin-reference-orbit.a {
            width: 268px;
            height: 268px;
            border-color: var(--reference-accent-soft);
            animation: orbitSpin 18s linear infinite;
        }
        .coin-reference-orbit.b {
            width: 224px;
            height: 224px;
            border-style: dashed;
            border-color: rgba(255,255,255,0.08);
            animation: orbitSpinReverse 24s linear infinite;
        }
        .coin-reference-medallion {
            position: relative;
            z-index: 1;
            width: 238px;
            height: 238px;
            margin: 0 auto 22px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background:
                radial-gradient(circle at 34% 28%, rgba(255,255,255,0.12), transparent 24%),
                repeating-radial-gradient(circle at center, rgba(255,255,255,0.04) 0 1px, transparent 1px 16px),
                linear-gradient(180deg, #242424 0%, #151515 58%, #101010 100%);
            box-shadow:
                inset 0 2px 4px rgba(255,255,255,0.05),
                inset 0 -18px 28px rgba(0,0,0,0.35),
                0 18px 36px rgba(0,0,0,0.28);
            animation: medallionFloat 6s ease-in-out infinite;
        }
        .coin-reference-medallion::before {
            content: "";
            position: absolute;
            inset: 16px;
            border-radius: 50%;
            border: 2px solid var(--reference-accent-soft);
            pointer-events: none;
        }
        .coin-reference-medallion::after {
            content: "";
            position: absolute;
            inset: 34px;
            border-radius: 50%;
            border: 1px solid rgba(255,255,255,0.08);
            pointer-events: none;
            animation: orbitSpin 20s linear infinite;
        }
        .coin-reference-medallion-inner {
            width: 164px;
            height: 164px;
            border-radius: 50%;
            border: 1px solid rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            text-align: center;
            padding: 16px;
            background: linear-gradient(180deg, rgba(255,255,255,0.04) 0%, rgba(0,0,0,0.14) 100%);
        }
        .coin-reference-year {
            font-size: 11px;
            font-weight: 700;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            color: rgba(255,255,255,0.58);
            margin-bottom: 8px;
        }
        .coin-reference-metal {
            font-family: 'Playfair Display', Georgia, serif;
            font-size: 34px;
            line-height: 1;
            color: var(--text-primary);
        }
        .coin-reference-sub {
            margin-top: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .coin-reference-stats {
            position: relative;
            z-index: 1;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 18px;
        }
        .coin-reference-stat {
            padding: 8px 12px;
            border-radius: 999px;
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(255,255,255,0.07);
            color: var(--text-secondary);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.01em;
            opacity: 0;
            transform: translateY(10px);
            animation: referenceStatIn 0.8s cubic-bezier(.2,.75,.2,1) forwards;
        }
        .coin-reference-stat:nth-child(1) { animation-delay: 0.08s; }
        .coin-reference-stat:nth-child(2) { animation-delay: 0.18s; }
        .coin-reference-stat:nth-child(3) { animation-delay: 0.28s; }
        .coin-reference-stat:nth-child(4) { animation-delay: 0.38s; }
        .coin-reference-actions {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 10px;
            margin: 0 0 14px;
        }
        .coin-reference-action {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 42px;
            padding: 10px 12px;
            border-radius: 12px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.03);
            color: var(--text-primary);
            text-decoration: none;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.02em;
            transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
        }
        .coin-reference-action:hover {
            transform: translateY(-1px);
            background: rgba(255,255,255,0.05);
            border-color: rgba(255,255,255,0.14);
        }
        .coin-reference-action.primary {
            background: linear-gradient(180deg, var(--reference-accent-soft) 0%, rgba(255,255,255,0.04) 100%);
            border-color: var(--reference-accent-soft);
        }
        .coin-reference-action.secondary {
            background: rgba(255,255,255,0.025);
        }
        .coin-reference-note {
            position: relative;
            z-index: 1;
            text-align: center;
            font-size: 12px;
            color: var(--text-dim);
        }
        .coin-reference-stats.image-mode {
            margin-bottom: 0;
        }
        @keyframes medallionFloat {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-7px); }
        }
        @keyframes orbitSpin {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }
        @keyframes orbitSpinReverse {
            from { transform: rotate(360deg); }
            to { transform: rotate(0deg); }
        }
        @keyframes referenceSweep {
            0%, 12% { transform: rotate(18deg) translate3d(-180%, 0, 0); }
            36%, 100% { transform: rotate(18deg) translate3d(360%, 0, 0); }
        }
        @keyframes referenceHaloPulse {
            0%, 100% { opacity: 0.45; transform: scale(0.96); }
            50% { opacity: 0.74; transform: scale(1.02); }
        }
        @keyframes referenceStatIn {
            from {
                opacity: 0;
                transform: translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        @media (prefers-reduced-motion: reduce) {
            .coin-reference-card::after,
            .coin-reference-stage::before,
            .coin-reference-orbit.a,
            .coin-reference-orbit.b,
            .coin-reference-medallion,
            .coin-reference-medallion::after,
            .coin-reference-stat {
                animation: none !important;
                transform: none !important;
                opacity: 1 !important;
            }
        }

        .coin-info h1 {
            font-family: 'Playfair Display', Georgia, serif;
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .coin-year {
            font-size: 20px;
            color: var(--gold);
            font-weight: 600;
            margin-bottom: 24px;
        }

        .coin-specs {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 32px;
        }

        .spec-row {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .spec-label {
            font-size: 13px;
            color: var(--text-dim);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            min-width: 120px;
            font-weight: 600;
        }
        .spec-value {
            font-size: 15px;
            color: var(--text-secondary);
        }

        .metal-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            display: inline-block;
            margin-right: 6px;
        }

        .status-badge {
            display: inline-block;
            font-size: 11px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 4px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .status-badge.available {
            background: rgba(34, 197, 94, 0.15);
            color: var(--green);
        }
        .status-badge.sold-out {
            background: rgba(239, 68, 68, 0.15);
            color: var(--red);
        }

        .rarity-badge {
            display: inline-block;
            font-size: 11px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 4px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .rarity-badge.rarity-ultra-rare {
            background: rgba(255, 92, 92, 0.15);
            color: #FF5C5C;
        }
        .rarity-badge.rarity-key {
            background: rgba(212, 168, 85, 0.15);
            color: var(--accent);
        }
        .rarity-badge.rarity-semi-key {
            background: rgba(192, 192, 192, 0.15);
            color: #c0c0c0;
        }

        .melt-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
            margin-bottom: 32px;
        }
        .melt-hero {
            text-align: center;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 20px;
        }
        .melt-hero-label {
            font-size: 11px;
            color: var(--text-dim);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .melt-hero-value {
            font-size: 36px;
            font-weight: 700;
            color: var(--gold);
            font-variant-numeric: tabular-nums;
            line-height: 1.1;
        }
        .melt-hero-usd {
            font-size: 18px;
            color: var(--text-muted);
            margin-top: 6px;
            font-variant-numeric: tabular-nums;
        }
        .melt-details {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 20px;
        }
        .melt-item { text-align: center; }
        .melt-label {
            font-size: 11px;
            color: var(--text-dim);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 4px;
        }
        .melt-value {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-secondary);
            font-variant-numeric: tabular-nums;
        }
        .melt-value.spot { color: var(--text-muted); }
        .melt-value.price { color: var(--text-primary); }
        .melt-value.premium { color: var(--teal); }
        .melt-sub {
            font-size: 12px;
            color: var(--text-dim);
            margin-top: 2px;
        }
        .melt-disclaimer {
            font-size: 11px;
            color: var(--text-dim);
            text-align: center;
            margin-top: 16px;
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }
        .melt-disclaimer a {
            color: var(--text-muted);
            text-decoration: underline;
        }

        .cta-button {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--gold);
            color: var(--bg-primary);
            padding: 14px 28px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 16px;
            text-decoration: none;
            transition: all 0.2s;
            margin-bottom: 32px;
        }
        .cta-button:hover {
            background: var(--gold-dim);
            transform: translateY(-2px);
            text-decoration: none;
        }

        .related-section {
            margin-top: 60px;
            border-top: 1px solid var(--border);
            padding-top: 40px;
        }
        .related-section h2 {
            font-family: 'Playfair Display', Georgia, serif;
            font-size: 24px;
            color: var(--text-primary);
            margin-bottom: 24px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 16px;
            text-decoration: none;
            transition: all 0.2s;
            display: block;
        }
        .related-card:hover {
            border-color: var(--gold);
            background: var(--bg-card-hover);
            text-decoration: none;
        }
        .collector-research .research-intro {
            max-width: 760px;
            margin-bottom: 24px;
        }
        .collector-research .research-intro p {
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .research-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 18px;
        }
        .research-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 20px;
        }
        .research-card h3 {
            font-size: 16px;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .research-list {
            padding-left: 18px;
            color: var(--text-secondary);
        }
        .research-list li {
            margin-bottom: 10px;
            line-height: 1.6;
        }
        .resource-links {
            display: grid;
            gap: 12px;
        }
        .resource-card {
            display: block;
            padding: 14px 16px;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: rgba(255,255,255,0.02);
            text-decoration: none;
            transition: all 0.2s;
        }
        .resource-card:hover {
            border-color: var(--gold);
            background: rgba(212,168,85,0.08);
            text-decoration: none;
        }
        .resource-card-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .resource-card-summary {
            font-size: 13px;
            line-height: 1.55;
            color: var(--text-muted);
        }
        .trust-note {
            margin-top: 24px;
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 760px;
        }
        .related-card-badge {
            display: inline-block;
            font-size: 11px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 4px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: var(--bg-primary);
            margin-bottom: 8px;
        }
        .related-card-name {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
            line-height: 1.3;
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-price {
            font-size: 14px;
            color: var(--gold);
            font-weight: 600;
        }

        .grade-pricing {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 20px;
            margin-bottom: 24px;
        }
        .grade-pricing-header {
            font-size: 12px;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            font-weight: 600;
        }
        .grade-pricing-source {
            font-size: 11px;
            color: var(--text-dim);
            margin-top: 10px;
        }
        .grade-variant-name {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 600;
            margin: 12px 0 6px;
        }
        .grade-variant-name:first-child { margin-top: 0; }
        .grade-table {
            width: 100%;
            border-collapse: collapse;
        }
        .grade-table th {
            font-size: 11px;
            color: var(--text-dim);
            text-transform: uppercase;
            letter-spacing: 0.3px;
            font-weight: 600;
            padding: 6px 8px;
            text-align: center;
            border-bottom: 1px solid var(--border);
        }
        .grade-table td {
            font-size: 13px;
            color: var(--text-secondary);
            padding: 6px 8px;
            text-align: center;
        }
        .grade-table td.price-val {
            color: var(--accent);
            font-weight: 600;
        }
        .grade-table-scroll {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        @media (max-width: 1024px) {
            .coin-detail { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .research-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .coin-info h1 { font-size: 24px; }
            .melt-details { grid-template-columns: 1fr; gap: 16px; }
            .related-grid { grid-template-columns: 1fr 1fr; }
            .coin-image-frame { min-height: 240px; }
            .coin-reference-medallion { width: 210px; height: 210px; }
            .coin-reference-actions { grid-template-columns: 1fr; }
        }