body {
    background-color: #000;
    color: #fff;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}
header {
    text-align: center;
    padding: 20px;
    border-bottom: 1px solid #333;
}
h1 {
    color: #fff;
    margin-bottom: 10px;
}
h2 {
    color: #0ff;
    border-bottom: 1px solid #0ff;
    padding-bottom: 5px;
}
a {
    color: #0ff;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
main {
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}
.category {
    margin-bottom: 30px;
}
ul {
    list-style-type: none;
    padding: 0;
}
li {
    margin-bottom: 5px;
}
.article {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}
.nav-links {
    text-align: center;
    margin-bottom: 20px;
    font-weight: bold;
}
.back-link {
    font-weight: bold;
}
footer {
    text-align: center;
    padding: 20px;
    border-top: 1px solid #333;
    color: #ccc;
}