:root {
            color-scheme: light;
            --strata-ink: #102235;
            --strata-muted: #4c6376;
            --strata-line: rgba(126, 159, 183, 0.24);
            --strata-panel: rgba(255, 255, 255, 0.9);
            --strata-primary: #0f72c7;
            --strata-primary-dark: #0b5fa7;
            --strata-glow: rgba(15, 114, 199, 0.18);
            --strata-shadow: rgba(16, 34, 53, 0.14);
        }

        * {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            min-height: 100vh;
            font-family: "Segoe UI", "Roboto", sans-serif;
            color: var(--strata-ink);
            background:
                radial-gradient(circle at top left, rgba(114, 198, 246, 0.28), transparent 32%),
                radial-gradient(circle at bottom right, rgba(15, 118, 110, 0.16), transparent 28%),
                linear-gradient(150deg, #e0f5ff 0%, #eef7fb 46%, #d5e4eb 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 24px;
        }

        .shell {
            width: min(860px, 100%);
            display: grid;
            gap: 22px;
            grid-template-columns: minmax(280px, 0.9fr) minmax(340px, 1.1fr);
        }

        .hero,
        .card {
            background: var(--strata-panel);
            border: 1px solid rgba(255, 255, 255, 0.72);
            border-radius: 26px;
            backdrop-filter: blur(18px);
            box-shadow: 0 20px 48px var(--strata-shadow);
        }

        .hero {
            padding: 34px;
        }

        .card {
            padding: 28px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border-radius: 999px;
            background: rgba(15, 114, 199, 0.12);
            color: var(--strata-primary-dark);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: 0.05em;
            padding: 8px 12px;
            text-transform: uppercase;
        }

        h1 {
            margin: 18px 0 12px;
            font-size: clamp(2rem, 4vw, 3rem);
            line-height: 1.04;
        }

        p,
        .helper-note,
        .status {
            color: var(--strata-muted);
            line-height: 1.65;
        }

        .hero p {
            margin: 0 0 16px;
        }

        .hero-list {
            display: grid;
            gap: 12px;
            margin-top: 20px;
        }

        .hero-item {
            padding: 14px 16px;
            border-radius: 18px;
            border: 1px solid var(--strata-line);
            background: rgba(247, 252, 255, 0.82);
        }

        .hero-item strong {
            display: block;
            margin-bottom: 6px;
            color: var(--strata-ink);
        }

        .card-head {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 12px;
            margin-bottom: 18px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .logo-badge {
            width: 46px;
            height: 46px;
            border-radius: 14px;
            display: grid;
            place-items: center;
            background: linear-gradient(180deg, #ffffff 0%, #e5f2ff 100%);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.88), 0 6px 16px rgba(15, 114, 199, 0.12);
            color: var(--strata-primary-dark);
            font-size: 20px;
        }

        .logo-copy strong {
            display: block;
            font-size: 1.12rem;
            margin-bottom: 4px;
        }

        .logo-copy span {
            color: var(--strata-muted);
            font-size: 0.88rem;
        }

        .back-link {
            color: var(--strata-primary-dark);
            text-decoration: none;
            font-weight: 700;
            font-size: 0.9rem;
        }

        .action-box {
            display: grid;
            gap: 16px;
        }

        .button-row {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .submit-button,
        .secondary-button {
            appearance: none;
            border-radius: 999px;
            cursor: pointer;
            font: inherit;
            font-weight: 700;
            min-height: 48px;
            padding: 0 18px;
        }

        .submit-button {
            border: 1px solid #0e5ca0;
            background: linear-gradient(180deg, var(--strata-primary) 0%, var(--strata-primary-dark) 100%);
            color: white;
            box-shadow: 0 12px 28px rgba(15, 114, 199, 0.22);
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            text-decoration: none;
        }

        .secondary-button {
            border: 1px solid #cad8e6;
            background: rgba(255, 255, 255, 0.88);
            color: var(--strata-ink);
        }

        .submit-button[disabled],
        .secondary-button[disabled] {
            cursor: wait;
            opacity: 0.82;
        }

        .status {
            display: none;
            border-radius: 14px;
            padding: 12px 14px;
            font-size: 0.88rem;
        }

        .status.info {
            display: block;
            background: rgba(219, 234, 254, 0.88);
            border: 1px solid rgba(59, 130, 246, 0.18);
            color: #1d4ed8;
        }

        .status.error {
            display: block;
            background: rgba(254, 226, 226, 0.82);
            border: 1px solid rgba(239, 68, 68, 0.2);
            color: #991b1b;
        }

        .status.success {
            display: block;
            background: rgba(240, 253, 244, 0.88);
            border: 1px solid rgba(34, 197, 94, 0.24);
            color: #15803d;
        }

        @media (max-width: 900px) {
            .shell {
                grid-template-columns: 1fr;
            }
        }

[hidden] { display: none !important; }
#rune-sign-in { width: min(560px, 100%); }
#rune-sign-in li { margin: 10px 0; line-height: 1.5; }
#rune-sign-in button, #rune-sign-in a { margin-top: 12px; }