body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: #f3f4f6;
    color: #1f2937;
}

.card {
    max-width: 560px;
    margin: 1rem;
    padding: 2rem;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
}

h1 {
    font-size: 1.6rem;
    margin-top: 0;
}

.note {
    color: #4b5563;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.go {
    display: inline-block;
    padding: 0.75rem 1.25rem;
    background: #2563eb;
    color: #fff;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
}

.go:hover {
    background: #1d4ed8;
}