.is-busy { cursor: wait !important; opacity: .8; }
.is-busy::before { content: ''; display: inline-block; width: 1em; height: 1em; margin-right: .6em; vertical-align: -.12em; border: 3px solid currentColor; border-top-color: transparent; border-radius: 50%; animation: busy-turn .7s linear infinite; }
a.is-busy { pointer-events: none; }
@keyframes busy-turn { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .is-busy::before { animation: none; } }