body{
    margin:0;
    font-family:Arial,sans-serif;
    background:#f5f5f5;
}

.container{
    width:90%;
    max-width:1200px;
    margin:auto;
}

.site-header{
    background:#0f172a;
    padding:20px 0;
}

.site-header h1{
    color:#fff;
    margin:0;
}

.site-header nav{
    margin-top:10px;
}

.site-header nav a{
    color:#fff;
    text-decoration:none;
    margin-right:20px;
}

.site-content{
    background:#fff;
    padding:40px;
    min-height:400px;
}

.site-footer{
    background:#111827;
    color:#fff;
    text-align:center;
    padding:20px 0;
}