:root {
            /* Foundation */
            --bg: #080C12;
            --bg-card: #161E28;
            --bg-elevated: #1E2A36;
            --bg-secondary: #111820;
            --border: #1E2A36;
            --border-color: #1E2A36;
            --border-light: #2A3A4A;
            --text: #F0F2F5;
            --text-primary: #F0F2F5;
            --text-secondary: #A0B0C0;
            --text-muted: #8494A7;
            --slate-200: #C0CCD8;
            --slate-300: #A0B0C0;
            --slate-400: #8494A7;

            /* Marketplace emerald (primary) */
            --accent: #34D399;
            --accent-hover: #2BA87A;
            --market-500: #34D399;
            --market-400: #4AE8AD;
            --market-bg: rgba(52, 211, 153, 0.08);
            --market-border: rgba(52, 211, 153, 0.18);
            --accent-soft: rgba(52, 211, 153, 0.10);

            /* Warm sparkle accent */
            --amber-light: #E8B04A;
            --amber: #E8B04A;
            --amber-bg: rgba(232, 176, 74, 0.12);
            --amber-border: rgba(232, 176, 74, 0.30);
            --amber-soft: rgba(232, 176, 74, 0.10);

            /* Status / utility */
            --success: #22C55E;
            --green: #22C55E;
            --green-soft: rgba(34, 197, 94, 0.12);
            --error: #EF4444;
            --info-blue: #3B82F6;

            /* Condition grade palette (Brand Guide) */
            --grade-a: #22C55E; /* Excellent — emerald */
            --grade-a-bg: rgba(34, 197, 94, 0.12);
            --grade-b: #E8B04A; /* Good — brand amber */
            --grade-b-bg: rgba(232, 176, 74, 0.14);
            --grade-c: #F59E0B; /* Fair — orange-amber warning */
            --grade-c-bg: rgba(245, 158, 11, 0.12);
            --grade-d: #EF4444; /* Poor — red */
            --grade-d-bg: rgba(239, 68, 68, 0.12);
            --grade-n: #3B82F6; /* New / aftermarket — blue tint */
            --grade-n-bg: rgba(59, 130, 246, 0.12);

            /* Seller verification tiers */
            --tier-neutral: #8494A7;
            --tier-id: #3B82F6;          /* ID verified */
            --tier-business: #F59E0B;    /* Business verified (gold) */
            --tier-licensed: #22C55E;    /* Licensed dismantler */
            --tier-premium: #A855F7;     /* Premium seller */

            /* Typography */
            --font-display: 'Urbanist', sans-serif;
            --font-heading: 'Plus Jakarta Sans', sans-serif;
            --font-body: 'DM Sans', sans-serif;
            --font-mono: 'JetBrains Mono', monospace;
        }
        html, body { max-width: 100vw; overflow-x: hidden; }
        body { font-family: var(--font-body); background: var(--bg); color: var(--text); margin: 0; }
        *, *::before, *::after { box-sizing: border-box; }
        img, svg, video { max-width: 100%; height: auto; }
        h1, .au-brand { font-family: var(--font-display); }
        h2, h3 { font-family: var(--font-heading); }
        h4, h5, h6 { font-family: var(--font-heading); }
        a { color: var(--accent); text-decoration: none; }
        a:hover { color: var(--accent-hover); }

        /* Mono / numeric data per Brand Guide */
        .mono, .price, .au-price {
            font-family: var(--font-mono);
            font-variant-numeric: tabular-nums;
            font-feature-settings: "tnum";
        }

        .au-nav { background: rgba(8,12,18,0.92); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; backdrop-filter: blur(12px); }
        .au-nav-inner { max-width: 1200px; margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
        .au-brand { color: var(--text); font-weight: 800; font-size: 1.1rem; letter-spacing: -0.02em; text-decoration: none; display: inline-flex; align-items: center; gap: 10px; white-space: nowrap; }
        .au-brand img.au-brand-logo { display: block; height: 48px; width: auto; max-width: 100%; }
        .au-brand img.au-brand-logo--sm { height: 40px; }
        .au-brand .swap { color: var(--market-400); }
        .au-brand .ai { color: var(--market-400); font-size: 0.42em; font-weight: 700; position: relative; top: 0.05em; margin-left: 0.12em; letter-spacing: 0; }
        .au-brand .tag { color: var(--market-400); font-family: var(--font-display); font-size: 0.72em; font-weight: 700; margin-left: 6px; letter-spacing: 0.04em; text-transform: uppercase; }
        .au-nav-links { display: flex; align-items: center; gap: 22px; }
        .au-nav-links a { color: var(--text-muted); font-weight: 500; font-size: 0.9rem; }
        .au-nav-links a:hover, .au-nav-links a.active { color: var(--text); }
        .au-nav-links a.au-nav-rp { color: var(--amber-light); font-weight: 700; }
        .au-nav-links a.au-nav-rp:hover { color: var(--amber-light); opacity: 0.85; }
        .au-cta { background: var(--accent); color: #0E1117 !important; padding: 8px 18px; border-radius: 8px; font-weight: 700; font-size: 0.85rem; white-space: nowrap; font-family: var(--font-heading); }
        .au-cta:hover { background: var(--accent-hover); color: #0E1117 !important; }

        /* Request-a-Part banner / pill (amber, dark text) */
        .au-rp-banner { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 14px; justify-content: center; background: var(--amber-light); color: #0E1117 !important; padding: 14px 18px; border-radius: 10px; text-decoration: none; font-weight: 700; box-shadow: 0 6px 18px rgba(232,176,74,0.22); text-align: center; transition: transform .15s; }
        .au-rp-banner:hover { transform: translateY(-1px); color: #0E1117 !important; }
        .au-rp-pill { background: #0E1117; color: var(--amber-light); padding: 3px 10px; border-radius: 100px; font-size: 0.7rem; letter-spacing: 0.04em; text-transform: uppercase; font-weight: 800; flex-shrink: 0; }

        /* Seller verification tier accent (small dot beside store chip) */
        .seller-tier-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--tier-neutral); flex-shrink: 0; vertical-align: middle; margin-right: 4px; }
        .seller-tier-dot.tier-id_verified { background: var(--tier-id); box-shadow: 0 0 0 2px rgba(59,130,246,0.18); }
        .seller-tier-dot.tier-business_verified { background: var(--tier-business); box-shadow: 0 0 0 2px rgba(245,158,11,0.18); }
        .seller-tier-dot.tier-licensed_dismantler { background: var(--tier-licensed); box-shadow: 0 0 0 2px rgba(34,197,94,0.20); }
        .seller-tier-dot.tier-premium_seller { background: var(--tier-premium); box-shadow: 0 0 0 2px rgba(168,85,247,0.18); }

        /* Mobile burger */
        .au-burger { display: none; background: transparent; border: 1px solid var(--border); color: var(--text); width: 42px; height: 42px; border-radius: 8px; padding: 0; cursor: pointer; align-items: center; justify-content: center; }
        .au-burger svg { width: 22px; height: 22px; }

        @media (max-width: 860px) {
            .au-brand .tag { display: none; }
            .au-nav-inner { padding: 12px 16px; }
            .au-burger { display: inline-flex; }
            .au-nav-links {
                position: absolute; top: 100%; left: 0; right: 0;
                flex-direction: column; align-items: stretch; gap: 0;
                background: rgba(8,12,18,0.98); border-bottom: 1px solid var(--border);
                padding: 8px 16px 16px; display: none;
            }
            .au-nav-links.open { display: flex; }
            .au-nav-links a { padding: 12px 6px; font-size: 1rem; border-bottom: 1px solid rgba(255,255,255,0.04); }
            .au-nav-links a:last-child { border-bottom: none; }
            .au-nav-links .au-cta { text-align: center; margin-top: 8px; }
        }

        .au-content { min-height: 60vh; }

        .au-footer { border-top: 1px solid var(--border); margin-top: 64px; padding: 48px 24px 24px; background: #0B1018; }
        .au-footer-inner { max-width: 1200px; margin: 0 auto; }
        .au-footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr; gap: 28px; margin-bottom: 36px; }
        @media (max-width: 1024px) { .au-footer-grid { grid-template-columns: 1fr 1fr 1fr; } }
        @media (max-width: 640px) { .au-footer-grid { grid-template-columns: 1fr 1fr; } }
        .au-footer h5 { font-family: var(--font-heading); font-size: 0.78rem; font-weight: 700; color: var(--text); text-transform: none; letter-spacing: 0; margin: 0 0 14px; }
        .au-footer a { display: block; color: var(--text-muted); font-size: 0.88rem; margin-bottom: 8px; }
        .au-footer a:hover { color: var(--text); }
        .au-footer-section { border-top: 1px solid var(--border); padding-top: 28px; margin-bottom: 28px; }
        .au-footer-section h4 { font-family: var(--font-heading); font-size: 0.95rem; font-weight: 700; color: var(--text); margin: 0 0 16px; }
        .au-footer-cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px 28px; }
        @media (max-width: 1024px) { .au-footer-cols { grid-template-columns: repeat(3, 1fr); } }
        @media (max-width: 640px) { .au-footer-cols { grid-template-columns: repeat(2, 1fr); } }
        .au-footer-bottom { border-top: 1px solid var(--border); padding-top: 18px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; color: var(--text-muted); font-size: 0.78rem; }
        .au-footer-bottom .vendor-link { color: var(--accent); font-weight: 600; }

        /* ── topbar-slot: per-page action buttons injected via {% block topbar_actions %} ── */
        .topbar-slot { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; padding-left: 12px; min-width: 0; overflow: visible; }