body {
    background: #222;
    color: #eee;
    font-family: sans-serif;
}

.topbar {
    background: #333;
    padding: 10px;
}

.card {
    background: #444;
    padding: 20px;
    width: 300px;
    margin: auto;
    border-radius: 5px;
}

input, button {
    width: 100%;
    padding: 8px;
    margin: 5px 0;
}

button {
    background: orange;
    border: none;
    color: black;
}