#login-form [name="login-button"]:disabled {
    opacity: .85;
    cursor: wait;
}
.vtx-login-spinner {
    display: inline-block;
    width: 1em;
    height: 1em;
    margin-right: .65em;
    vertical-align: -.15em;
    border: 2px solid rgba(255, 255, 255, .4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: vtx-login-spin .7s linear infinite;
}
.vtx-login-error {
    margin-bottom: 1rem;
    padding: .75rem 1rem;
    border: 1px solid #f2c8c8;
    border-radius: .5rem;
    background: #fff5f5;
    color: #a4262c;
    font-size: .9rem;
}
@keyframes vtx-login-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
    .vtx-login-spinner { animation: none; }
}