:root {
            --bg: #f9fafb;
            --card: #ffffff;
            --accent: #2563eb;
            --text: #1f2937;
        }

        html,
        body {
            height: 100%;
            margin: 0;
            font-family: 'Courier New', Courier, monospace;
            color: var(--text);
            background: linear-gradient(180deg, #e5e7eb 0%, var(--bg) 100%);
        }

        .container {
            min-height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 2rem;
            box-sizing: border-box;
        }

        .card {
            background: rgba(0, 0, 0, 0.03);
            border: 1px solid rgba(0, 0, 0, 0.04);
            padding: 2rem;
            border-radius: 12px;
            max-width: 720px;
            width: 100%;
            text-align: center;
            box-shadow: 0 8px 30px rgba(2, 6, 23, 0.6);
        }

        img.logo {
            width: 140px;
            height: auto;
            margin-bottom: 1rem;
            display: block;
            margin-left: auto;
            margin-right: auto;
        }

        h1 {
            margin: 0 0 0.5rem 0;
            font-size: 2rem;
            letter-spacing: 0.02em
        }

        p.lead {
            margin: 0 0 1.25rem 0;
            opacity: 0.9
        }

        nav {
            display: flex;
            gap: .75rem;
            flex-wrap: wrap;
            justify-content: center
        }

        a.btn {
            background: transparent;
            border: 1px solid rgba(0, 0, 0, 0.06);
            color: var(--text);
            padding: .6rem .9rem;
            border-radius: 8px;
            text-decoration: none;
            transition: all .15s ease
        }

        a.btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 18px rgba(3, 7, 18, 0.6);
            border-color: var(--accent);
            color: var(--accent)
        }