/* Modern CSS with responsive design */
:root {
    --primary: #2563eb;
    --dark: #1e293b;
    --light: #f8fafc;
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--light);
    color: var(--dark);
}

header {
    background: var(--primary);
    color: white;
    padding: 2rem 1rem;
    text-align: center;
}

main {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
}

footer {
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
    border-top: 1px solid #e2e8f0;
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

@media (prefers-color-scheme: dark) {
    body {
        background: #0f172a;
        color: #e2e8f0;
    }
}