body {
    background: #2E2E2E;
    font-family: 'Roboto', sans-serif;
    font-weight: 400;
}

.card {
    margin: 25px auto;
    padding: 20px;
    width: 400px;
    background: #d1d1d1;
    border-radius: 8px;
}

.navigation-card {
    width: 500px;
    text-align: center;
}

.navigation-buttons a {
    margin-left: 10px;
}

.navigation-buttons a:first-child {
    margin-left: 0px;
}

.button-default {
    text-decoration: none;
    border: 2px solid #818181;
    background-color: #d1d1d1;
    border-radius: 5px;
    padding: 5px;
    font-size: 18px;
    white-space: nowrap;
    margin-top: 2px;
    margin-bottom: 2px;
    color: #818181;
    cursor: pointer;
}

.button-default:hover {
    color: #d1d1d1;
    background-color: #818181;
}

@media screen and (max-width: 768px) {
    .card {
        width: 80%;
    }
}