body {
    background-color: #0d1117;
    color: #58a6ff;
    font-family: 'Segoe UI', sans-serif;
    text-align: center;
    padding-top: 100px;
}

.box {
    border: 2px solid #30336d;
    display: inline-block;
    padding: 40px;
    border-radius: 15px;
    background: #161b22;
}

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

nav a:hover {
    color: #58a6ff;
}