.btn.is-loading,
.loginbtn.is-loading,
.verifybtn.is-loading,
.resendbtn.is-loading,
.btn-verify.is-loading,
.qr-next-btn.is-loading {
  pointer-events: none;
  opacity: 0.88;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  cursor: wait;
}

.btn:disabled,
.loginbtn:disabled,
.verifybtn:disabled,
.resendbtn:disabled,
.btn-verify:disabled {
  cursor: wait;
}

.btn-spinner {
  width: 1.15em;
  height: 1.15em;
  border: 2.5px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: btnSpin 0.7s linear infinite;
  flex-shrink: 0;
}

.resendbtn .btn-spinner {
  border-color: rgba(0, 0, 0, 0.2);
  border-top-color: #111;
}

@keyframes btnSpin {
  to { transform: rotate(360deg); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

.shake {
  animation: shake 0.4s ease;
}

.login-box,
.qr-container,
.verify-container {
  animation: cardEnter 0.45s ease-out;
}

@keyframes cardEnter {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}