.app {
    max-width: 900px;
    margin: auto;
    padding: 16px
}

@media (max-width: 576px) {
    .app {
        max-width: 480px
    }

    .nav-tabs .nav-link {
        width: 50%;
        text-align: center
    }
}

body{
    background: #cedeeb;
}