body {
    font-family: sans-serif;
    background-color: #f4f4f4;
    color: #333;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: #003366; /* DARC Blue-ish */
    color: #fff;
    padding: 20px;
    margin-bottom: 30px;
}

header a { color: #fff; text-decoration: none; }

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline-block;
    margin-right: 15px;
}

.key-specs {
    background: #e1e1e1;
    padding: 15px;
    border-left: 5px solid #d4af37; /* Brass color for keys */
    margin: 20px 0;
}

.card {
    border: 1px solid #ddd;
    padding: 15px;
    margin-bottom: 15px;
    background: white;
}