html {
    font-size: 14px;
}

@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;
}

html {
    min-height: 100%;
}

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

main {
    flex: 1 0 auto;
}

footer.footer {
    flex-shrink: 0;
}

.footer-content {
    line-height: 1.5;
    font-size: 1rem;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.75);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
}

.loading-box {
    text-align: center;
    padding: 25px 35px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,.2);
    min-width: 260px;
}

.certificaten-table > thead > tr > th {
    border-bottom: 0 !important;
}

#mainHeader {
    position: sticky;
    top: 0;
    z-index: 1030;
    transition: transform 0.25s ease;
}

    #mainHeader.header-hidden {
        transform: translateY(-100%);
    }