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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
}

header {
    background: #2563eb;
    color: white;
    padding: 1rem 2rem;
}

nav a {
    color: white;
    text-decoration: none;
    margin-right: 1.5rem;
    font-weight: 500;
}

nav a:hover {
    text-decoration: underline;
}

main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

h1 {
    margin-bottom: 1rem;
    color: #1e40af;
}

footer {
    background: #f3f4f6;
    padding: 2rem;
    text-align: center;
    margin-top: 4rem;
}