.stp-auth-busy input[type=submit],.stp-auth-busy button[type=submit]{opacity:.75;cursor:wait}
.stp-auth-loading{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:10px;font-size:13px;line-height:1.6;color:inherit}
.stp-auth-spinner{display:inline-block;width:16px;height:16px;flex:none;border:2px solid currentColor;border-inline-end-color:transparent;border-radius:50%;animation:stp-auth-spin .75s linear infinite}
@keyframes stp-auth-spin{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){.stp-auth-spinner{animation:none}}