:root {
            --bg:      #060d14;
            --fg:      #e0ecf5;
            --accent:  #00c896;
            --accent2: #00e0a8;
            --muted:   rgba(224,236,245,0.5);
            --glow:    rgba(0,200,150,0.25);
            --card:    rgba(255,255,255,0.03);
            --card2:   rgba(255,255,255,0.055);
            --border:  rgba(0,200,150,0.14);
            --warn:    #f0a500;
            --danger:  #e04444;
        }

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

        html, body {
            background: var(--bg);
            color: var(--fg);
            font-family: 'DM Sans', sans-serif;
            font-size: 15px;
            line-height: 1.7;
        }

        body::before {
            content: '';
            position: fixed;
            inset: 0;
            background:
                radial-gradient(ellipse 70% 40% at 50% -10%, rgba(0,200,150,0.06) 0%, transparent 70%),
                url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
            pointer-events: none;
            z-index: 0;
        }

        .page {
            max-width: 820px;
            margin: 0 auto;
            padding: clamp(2rem, 6vw, 4rem) clamp(1rem, 5vw, 2rem);
            position: relative;
            z-index: 1;
        }

        /* ── Nav ── */
        .nav { display: flex; align-items: center; margin-bottom: 3rem; }
        .back-link {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            color: var(--accent);
            text-decoration: none;
            font-size: 0.85rem;
            letter-spacing: 0.06em;
            font-weight: 500;
            transition: opacity 0.2s;
        }
        .back-link:hover { opacity: 0.7; }

        /* ── Header ── */
        .doc-header {
            border-bottom: 1px solid var(--border);
            padding-bottom: 2rem;
            margin-bottom: 2.5rem;
        }
        .doc-label {
            font-size: 0.72rem;
            letter-spacing: 0.15em;
            text-transform: uppercase;
            color: var(--muted);
            margin-bottom: 0.5rem;
        }
        h1 {
            font-family: 'Bebas Neue', sans-serif;
            font-size: clamp(2.2rem, 6vw, 3.2rem);
            letter-spacing: 0.04em;
            color: var(--fg);
            line-height: 1.1;
            margin-bottom: 0.75rem;
        }
        .doc-meta {
            font-size: 0.8rem;
            color: var(--muted);
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
        }

        /* ── Section headings ── */
        h2 {
            font-family: 'Bebas Neue', sans-serif;
            font-size: 1.5rem;
            letter-spacing: 0.06em;
            color: var(--fg);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            padding-bottom: 0.4rem;
            border-bottom: 1px solid var(--border);
        }
        p {
            color: rgba(224,236,245,0.85);
            margin-bottom: 0.85rem;
        }
        p:last-child { margin-bottom: 0; }

        /* ── Callout boxes ── */
        .callout {
            border-radius: 8px;
            padding: 1.1rem 1.4rem;
            margin: 1.5rem 0;
            display: flex;
            gap: 1rem;
            align-items: flex-start;
        }
        .callout-icon { font-size: 1.3rem; flex-shrink: 0; line-height: 1.5; }
        .callout-body { flex: 1; }
        .callout-body strong { display: block; margin-bottom: 0.3rem; }
        .callout-body p { margin: 0; font-size: 0.9rem; }

        .callout-approved {
            background: rgba(0,200,150,0.07);
            border: 1px solid rgba(0,200,150,0.25);
        }
        .callout-approved .callout-icon { color: var(--accent); }
        .callout-approved strong { color: var(--accent); }

        .callout-danger {
            background: rgba(224,68,68,0.07);
            border: 1px solid rgba(224,68,68,0.3);
        }
        .callout-danger .callout-icon { color: var(--danger); }
        .callout-danger strong { color: var(--danger); }

        .callout-warn {
            background: rgba(240,165,0,0.07);
            border: 1px solid rgba(240,165,0,0.28);
        }
        .callout-warn .callout-icon { color: var(--warn); }
        .callout-warn strong { color: var(--warn); }

        /* ── Hash display ── */
        .hash-card {
            background: #0a1520;
            border: 1px solid rgba(0,200,150,0.3);
            border-radius: 10px;
            padding: 1.4rem 1.6rem;
            margin: 1.5rem 0;
        }
        .hash-card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 0.8rem;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .hash-label {
            font-size: 0.72rem;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: var(--muted);
            font-weight: 600;
        }
        .version-badge {
            background: rgba(0,200,150,0.12);
            color: var(--accent);
            border: 1px solid rgba(0,200,150,0.3);
            border-radius: 4px;
            font-size: 0.78rem;
            font-weight: 700;
            padding: 2px 10px;
            letter-spacing: 0.06em;
        }
        .hash-value {
            font-family: 'Courier New', monospace;
            font-size: 0.88rem;
            color: var(--accent2);
            word-break: break-all;
            background: rgba(0,0,0,0.3);
            border-radius: 5px;
            padding: 0.65rem 0.9rem;
            letter-spacing: 0.03em;
            line-height: 1.6;
            cursor: text;
            user-select: all;
        }
        .hash-hint {
            margin-top: 0.5rem;
            font-size: 0.78rem;
            color: var(--muted);
        }

        /* ── Steps ── */
        .step-block {
            margin: 1.5rem 0;
            counter-reset: steps;
        }
        .step {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.2rem;
            align-items: flex-start;
        }
        .step-num {
            background: rgba(0,200,150,0.12);
            color: var(--accent);
            border: 1px solid rgba(0,200,150,0.3);
            border-radius: 50%;
            min-width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.82rem;
            flex-shrink: 0;
            margin-top: 2px;
        }
        .step-body { flex: 1; }
        .step-body p { margin: 0 0 0.5rem; color: rgba(224,236,245,0.85); font-size: 0.9rem; }

        /* ── Code blocks ── */
        .code-block {
            position: relative;
            margin: 0.6rem 0;
        }
        .code-block pre {
            font-family: 'Courier New', monospace;
            font-size: 0.84rem;
            background: #0a1520;
            border: 1px solid rgba(0,200,150,0.18);
            border-radius: 6px;
            padding: 0.7rem 2.8rem 0.7rem 1rem;
            color: #8de5c6;
            word-break: break-all;
            white-space: pre-wrap;
            line-height: 1.6;
        }
        .copy-btn {
            position: absolute;
            top: 6px;
            right: 6px;
            background: rgba(0,200,150,0.1);
            border: 1px solid rgba(0,200,150,0.25);
            border-radius: 4px;
            color: var(--accent);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 3px 8px;
            cursor: pointer;
            letter-spacing: 0.05em;
            transition: background 0.15s;
            font-family: 'DM Sans', sans-serif;
        }
        .copy-btn:hover { background: rgba(0,200,150,0.2); }
        .copy-btn.copied { color: #fff; background: rgba(0,200,150,0.35); }

        /* ── Result indicators ── */
        .result-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
            margin: 1.2rem 0;
        }
        @media (max-width: 520px) { .result-grid { grid-template-columns: 1fr; } }
        .result-card {
            border-radius: 8px;
            padding: 1rem 1.2rem;
        }
        .result-card-ok {
            background: rgba(0,200,150,0.07);
            border: 1px solid rgba(0,200,150,0.25);
        }
        .result-card-fail {
            background: rgba(224,68,68,0.07);
            border: 1px solid rgba(224,68,68,0.3);
        }
        .result-title {
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: 0.4rem;
        }
        .result-card-ok .result-title { color: var(--accent); }
        .result-card-fail .result-title { color: var(--danger); }
        .result-card p { font-size: 0.85rem; color: rgba(224,236,245,0.75); margin: 0; }

        /* ── Table ── */
        .versions-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.2rem 0;
            font-size: 0.88rem;
        }
        .versions-table th {
            background: rgba(255,255,255,0.04);
            color: var(--muted);
            text-transform: uppercase;
            font-size: 0.7rem;
            letter-spacing: 0.1em;
            padding: 8px 14px;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }
        .versions-table td {
            padding: 8px 14px;
            border-bottom: 1px solid rgba(255,255,255,0.04);
            color: rgba(224,236,245,0.8);
            vertical-align: top;
        }
        .versions-table tr:last-child td { border-bottom: none; }
        .versions-table .current td { background: rgba(0,200,150,0.04); }
        .versions-table .mono { font-family: 'Courier New', monospace; font-size: 0.78rem; color: var(--accent2); word-break: break-all; }
        .tag-current {
            background: rgba(0,200,150,0.15);
            color: var(--accent);
            border-radius: 3px;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 1px 7px;
            letter-spacing: 0.05em;
        }

        /* ── Footer ── */
        .footer {
            margin-top: 4rem;
            padding-top: 2rem;
            border-top: 1px solid var(--border);
            font-size: 0.8rem;
            color: var(--muted);
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            justify-content: space-between;
        }
        .footer a { color: var(--accent); text-decoration: none; }
        .footer a:hover { opacity: 0.7; }