.btn-loader{border:4px solid #f3f3f3;border-top:4px solid #3498db;border-radius:50%;width:20px;height:20px;animation:spin 2s linear infinite}.shake{animation:shake .82s cubic-bezier(.36,.07,.19,.97) both;transform:translateZ(0);backface-visibility:hidden;perspective:1000px}@keyframes shake{10%,90%{transform:translate3d(-1px,0,0)}20%,80%{transform:translate3d(2px,0,0)}30%,50%,70%{transform:translate3d(-4px,0,0)}40%,60%{transform:translate3d(4px,0,0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}button[type=submit]:disabled{pointer-events:none;filter:grayscale(.8)}.loading-btn:disabled{pointer-events:none;filter:grayscale(.8)}