* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: sans-serif;
}

body {
    line-height: 1.6;
    background: #ffffff;
    color: #222;
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

header {
    margin-bottom: 40px;
}

nav {
    margin-top: 10px;
}

nav a {
    margin-right: 15px;
    text-decoration: none;
    color: #444;
}

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

section {
    margin-bottom: 40px;
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

footer {
    margin-top: 60px;
    font-size: 0.9rem;
    color: #666;
}