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

body {
    font-family: system-ui, -apple-system, sans-serif;
    line-height: 1.6;
}

header {
    padding: 1rem;
    background: #333;
    color: white;
}

main {
    padding: 2rem;
}

footer {
    padding: 1rem;
    text-align: center;
    color: #666;
}