body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: #f5f5f5;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.container {
    padding: 2rem;
    width: 100%;
    max-width: 500px;
}

.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 3rem 2rem;
    text-align: center;
}

.icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

h1 {
    color: #d32f2f;
    margin: 0 0 1rem 0;
    font-size: 1.5rem;
}

.message {
    color: #333;
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.detail {
    color: #666;
    font-size: 0.875rem;
    line-height: 1.5;
}

.user-info {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid #eee;
    color: #888;
    font-size: 0.8rem;
}