:root {
    --bg-color: #0f172a;
    --bg-gradient-a: #0f172a;
    --bg-gradient-b: #1e293b;
    --text-color: #e2e8f0;
    --muted-color: #94a3b8;
    --accent-color: #38bdf8;
    --card-bg: rgba(255, 255, 255, 0.04);
    --card-border: rgba(255, 255, 255, 0.08);
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-a), var(--bg-gradient-b));
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

main {
    max-width: 560px;
    width: 100%;
    text-align: center;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 48px 40px;
    backdrop-filter: blur(6px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

h1 {
    font-size: 2.5rem;
    margin: 0 0 8px;
    letter-spacing: 0.02em;
}

h1 span {
    color: var(--accent-color);
}

.subtitle {
    font-size: 1rem;
    color: var(--muted-color);
    margin: 0 0 32px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 999px;
    background: rgba(56, 189, 248, 0.12);
    border: 1px solid rgba(56, 189, 248, 0.35);
    color: var(--accent-color);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 28px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-color);
}

p.description {
    color: var(--muted-color);
    line-height: 1.6;
    margin: 0 0 32px;
}

footer {
    font-size: 0.8rem;
    color: var(--muted-color);
    opacity: 0.7;
}