/* Temporary mourning mode. Enabled by js/base/mourning_mode.js. */
html.mourning-mode {
    filter: grayscale(100%);
}

/* Avoid a distracting colour transition while the mode is enabled. */
html.mourning-mode *,
html.mourning-mode *::before,
html.mourning-mode *::after {
    transition-property: none !important;
}