body {
    margin: 0;
    padding: 0;
}

header {
    background-color: #333;
    color: #fff;
    padding: 10px;
}

.container {
    max-width: 700px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    margin: 0;
    font-size: 28px;
}

h2 {
    font-size: 24px;
    margin-top: 30px;
}

h3 {
    font-size: 20px;
    margin-top: 20px;
}

p {
    margin-top: 10px;
}

li {
    margin-bottom: 10px;
}

a {
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

footer {
    text-align: center;
}