body {
    font-family: Arial, sans-serif;
    background:#0b0f0b;
    color:#d7ffd9;
    margin:0;
}
.nav {
    background:#111;
    padding:15px;
    text-align:center;
}
.nav a {
    color:#7cff9b;
    margin:0 15px;
    text-decoration:none;
    font-weight:bold;
}
.container {
    max-width:900px;
    margin:40px auto;
    padding:20px;
}
.card {
    background:#111;
    border:1px solid #1f7a3a;
    padding:20px;
    margin-bottom:20px;
    border-radius:8px;
}
h1,h2 { color:#7cff9b; }
a { color:#9affb5; }