html {
    font-size: 14px;
    height: 100%;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

/* Sticky-Footer Layout (Flexbox) */

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* main übernimmt den restlichen Platz */
main {
    flex: 1;
}