body {
    font-family: system-ui, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: #fafafa;
    color: #333;
}

header, footer {
    background: #1a1a1a;
    color: white;
    padding: 1em;
    text-align: center;
}

nav a {
    margin: 0 1em;
    color: #80d4ff;
    text-decoration: none;
}

main {
    padding: 2em;
    max-width: 800px;
    margin: auto;
}

section {
    background: white;
    padding: 2em;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}