:root {
    --color-bg: #f4f6f8;
    --color-card: #ffffff;
    --color-text: #2c3e50;
    --color-muted: #5a6b7c;
    --color-accent: #004a8f;
    --color-accent-light: #e6f0f8;
    --color-highlight: #c0392b;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --radius: 16px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.container {
    width: 100%;
    max-width: 560px;
}

.card {
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2.5rem 2rem;
    text-align: center;
}

.shield {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.25rem;
    background: var(--color-accent-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.shield-icon {
    font-size: 2.5rem;
    line-height: 1;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 0.25rem;
}

.highlight {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-highlight);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
}

.message {
    text-align: left;
    background: var(--color-accent-light);
    border-left: 4px solid var(--color-accent);
    border-radius: 8px;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.message p + p {
    margin-top: 0.75rem;
}

.message .thanks {
    font-weight: 600;
    color: var(--color-accent);
    margin-top: 1rem;
}

footer {
    border-top: 1px solid #e2e8f0;
    padding-top: 1.25rem;
    font-size: 0.875rem;
    color: var(--color-muted);
}

@media (max-width: 480px) {
    .card {
        padding: 1.75rem 1.25rem;
    }

    h1 {
        font-size: 1.5rem;
    }
}