:root {
    --background-1: #282828;
    --background-2: #363636;
    --background-3: #484848;
    --text-color-1: #f0f0f0;
    --text-color-2: #c0c0c0;
    --text-color-invert: #f0f0f0;
    --text-color-invert-2: #c0c0c0;
    --barrier-color: rgba(0, 0, 0, .5);

    --color-normal: #707070;
    --color-accent: #0d6efd;
    --color-warning: #ffb300;
    --color-error: #dc3545;
    --color-success: #198754;
}

input:disabled, select:disabled {
    background-color: #949494;
}

/* Customization of Bootstrap components */

.nav {
    --bs-nav-tabs-link-hover-border-color: transparent;
    --bs-nav-tabs-border-width: 0;
    --bs-nav-tabs-link-active-bg: var(--background-1);
    --bs-nav-tabs-link-active-color: var(--text-color-1);
}