.submit-guard-busy {
    position: relative;
    cursor: wait !important;
    opacity: .72;
    pointer-events: none !important;
}

.submit-guard-busy::after {
    content: "";
    display: inline-block;
    width: 13px;
    height: 13px;
    margin-inline-start: 7px;
    vertical-align: -2px;
    border: 2px solid currentColor;
    border-inline-end-color: transparent;
    border-radius: 50%;
    animation: submit-guard-spin .7s linear infinite;
}

@keyframes submit-guard-spin {
    to { transform: rotate(360deg); }
}