.tail-container * {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }

        /* Viewport-fixed hero — same look on short and long pages */
        .hero-bg {
            background: linear-gradient(135deg, #0f172a 0%, #1e40af 100%);
            background-attachment: fixed;
            position: relative;
            min-height: 100vh;
        }

        .hero-bg::before {
            content: '';
            position: fixed;
            inset: 0;
            z-index: 0;
            background: radial-gradient(circle at 30% 70%, rgba(14, 165, 233, 0.15) 0%, transparent 50%);
            pointer-events: none;
        }

        .form-card {
            box-shadow: 0 25px 50px -12px rgb(14 165 233 / 0.25);
        }

        #site-chrome {
            position: relative;
            z-index: 20;
            margin-bottom: 1.25rem;
        }

        .site-chrome-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 0.75rem 0;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 0.85rem;
            min-width: 0;
            text-decoration: none;
            color: inherit;
        }

        .brand img {
            height: 52px;
            width: auto;
            flex-shrink: 0;
            filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.35));
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            gap: 0.15rem;
            min-width: 0;
        }

        .brand-name {
            font-size: 1.15rem;
            font-weight: 600;
            color: #f8fafc;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .brand-sub {
            font-size: 0.8rem;
            font-weight: 500;
            color: #7dd3fc;
            line-height: 1.2;
        }

        /* Site menu + menu-toggle styles: theme.css (tool-v1 refined panel) */

        table.status-table {
            width: 100%;
            min-width: 640px;
            table-layout: fixed;
            border-collapse: separate;
            border-spacing: 0;
        }

        table.status-table th,
        table.status-table td {
            vertical-align: top;
            text-align: left;
            padding: 0.75rem 1rem 0.75rem 0;
        }

        table.status-table th:last-child,
        table.status-table td:last-child {
            padding-right: 0;
        }

        table.status-table col.col-name { width: 13.5rem; }
        table.status-table col.col-status { width: 7.5rem; }
        table.status-table col.col-flag { width: 5.5rem; }

        table.status-table .status-tag {
            display: inline-block;
            white-space: nowrap;
        }

        code, pre.sample {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }

        pre.sample {
            margin: 0;
            white-space: pre;
            overflow-x: auto;
            font-size: 0.75rem;
            line-height: 1.45;
            color: #3f3f46;
        }

        .section-jump {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
        }

        .section-pill {
            display: inline-block;
            padding: 0.4rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            line-height: 1.2;
            text-decoration: none;
            color: #e0f2fe;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: background 0.15s ease, border-color 0.15s ease;
        }

        .section-pill:hover {
            background: rgba(255, 255, 255, 0.16);
            border-color: rgba(125, 211, 252, 0.35);
        }

        .section-card {
            padding: 0.85rem 1.25rem !important;
            scroll-margin-top: 1rem;
        }

        .section-card[open] {
            padding: 1.25rem 1.5rem !important;
        }

        @media (min-width: 640px) {
            .section-card {
                padding: 0.85rem 1.5rem !important;
            }
            .section-card[open] {
                padding: 1.5rem 2rem !important;
            }
        }

        .section-card summary {
            list-style: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            user-select: none;
            min-height: 2rem;
        }

        .section-card summary::-webkit-details-marker { display: none; }

        .section-card summary .section-title {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--sh-heading, #18181b);
            flex: 1 1 auto;
            min-width: 0;
            line-height: 1.3;
        }

        .section-card summary .chevron {
            flex-shrink: 0;
            width: 1.5rem;
            height: 1.5rem;
            border-radius: 0.4rem;
            background: var(--sh-chevron-bg, #f4f4f5);
            color: var(--sh-chevron-fg, #52525b);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
        }

        .section-card[open] summary .chevron {
            transform: rotate(180deg);
            background: var(--sh-chevron-open-bg, #e0f2fe);
            color: var(--sh-chevron-open-fg, #0369a1);
        }

        .section-card .section-body {
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid var(--sh-border, #f4f4f5);
        }

        /* back-to-top: theme.css + site-nav.js initBackToTop() */