body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #fbfbfb;
    color: #333;
}

header {
    background: #1e1e1e;
    padding: 15px 0;
    margin-bottom: 20px;
}

nav {
    max-width: 900px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav a {
    color: #fff;
    margin-left: 15px;
    text-decoration: none;
}

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

main {
    max-width: 900px;
    margin: auto;
    padding: 20px;
}

footer {
    margin-top: 40px;
    background: #efefef;
    text-align: center;
    padding: 20px;
}

p { line-height: 1.6; }
.section { margin-bottom: 40px; }
h1, h2, h3 { font-weight: normal; }