body {
    margin:0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background:#ffffff;
    color:#1e293b;
    line-height:1.8;
}

header {
    background:#0f172a;
    color:white;
    padding:60px 20px;
    text-align:center;
}

nav {
    background:#1e293b;
    padding:15px 20px;
    text-align:center;
}

nav a {
    color:#ffffff;
    margin:0 15px;
    text-decoration:none;
    font-weight:600;
}

.container {
    max-width:1000px;
    margin:60px auto;
    padding:0 20px;
}

.article {
    margin-bottom:60px;
    padding-bottom:40px;
    border-bottom:1px solid #e2e8f0;
}

footer {
    background:#0f172a;
    color:white;
    text-align:center;
    padding:40px 20px;
    margin-top:80px;
}