.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.btn-google:hover {
  background-color: var(--color-hover);
  border-color: #D4D4D4;
}
.btn-google svg {
  flex-shrink: 0;
}
#googleSignInButton,
#googleSignUpButton {
  width: 100%;
  display: block;
}
#googleSignInButton > div,
#googleSignUpButton > div,
#googleSignInButton > div > div,
#googleSignUpButton > div > div,
#googleSignInButton iframe,
#googleSignUpButton iframe {
  width: 100% !important;
  max-width: 100% !important;
  display: block !important;
}
.login-divider {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: var(--space-6) 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}
.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--color-border);
}
.login-divider span {
  padding: 0 var(--space-4);
}
.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}
.form-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-2);
}
.form-link {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  text-align: center;
  cursor: pointer;
  transition: color var(--transition-fast);
}
.form-link:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}
.signup-consents {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
  background-color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.consent-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
  line-height: 1.4;
}
.consent-checkbox input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}
.consent-checkmark {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 1px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}
.consent-checkmark::after {
  content: '';
  display: none;
  width: 5px;
  height: 9px;
  border: 2px solid white;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translate(-1px, -1px);
}
.consent-checkbox input[type="checkbox"]:checked + .consent-checkmark {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}
.consent-checkbox input[type="checkbox"]:checked + .consent-checkmark::after {
  display: block;
}
.consent-checkbox:hover .consent-checkmark {
  border-color: var(--color-accent);
}
.consent-checkbox input[type="checkbox"]:focus-visible + .consent-checkmark {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.consent-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
}
.consent-text a {
  color: var(--color-accent);
  text-decoration: underline;
  font-weight: var(--font-weight-medium);
}
.consent-text a:hover {
  color: var(--color-accent-hover);
}
#signupSubmitBtn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}
.form-message {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-3);
}
.form-message-success {
  background-color: var(--color-success-light);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}
.form-message-error {
  background-color: var(--color-error-light);
  color: var(--color-error);
  border: 1px solid var(--color-error);
}
.form-message-info {
  background-color: var(--color-info-light);
  color: var(--color-info);
  border: 1px solid var(--color-info);
}
.form-message-warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning);
  border: 1px solid var(--color-warning);
}
.password-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}
.password-toggle-btn {
  position: absolute;
  right: var(--space-3);
  padding: var(--space-1);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}
.password-toggle-btn:hover {
  color: var(--color-text-primary);
}
.password-input-wrapper .input {
  padding-right: var(--space-10);
}
.signup-hint {
  margin-top: var(--space-4);
  padding: var(--space-3);
  background-color: var(--color-muted);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
}
.btn-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.7;
}
.btn-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: button-spin 0.6s linear infinite;
}
@keyframes button-spin {
  to { transform: rotate(360deg); }
}
.back-to-login {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast);
  margin-top: var(--space-3);
}
.back-to-login:hover {
  color: var(--color-accent);
}
@media (max-width: 768px) {
  .btn-google {
    min-height: 44px;
  }
  .password-toggle-btn {
    min-width: 44px;
    min-height: 44px;
  }
  .back-to-login {
    min-height: 44px;
  }
}
@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }
  .btn-google {
    min-height: 48px;
    font-size: var(--font-size-md);
  }
  .login-divider {
    margin: var(--space-4) 0;
  }
  .signup-hint {
    font-size: var(--font-size-sm);
  }
}
.otp-input {
  font-size: var(--font-size-2xl, 1.5rem) !important;
  letter-spacing: 0.25em;
  font-weight: 700;
  font-family: 'Courier New', Courier, monospace;
  text-align: center;
  text-transform: uppercase;
  padding: var(--space-4) var(--space-3);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
  max-width: 280px;
  margin: 0 auto;
  display: block;
}
.otp-input:focus {
  border-color: var(--color-primary, #4F46E5);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
  outline: none;
}
.otp-input::placeholder {
  letter-spacing: 0.15em;
  color: var(--color-text-tertiary, #9CA3AF);
}
#signupOtpStep {
  animation: fadeInUp 0.25s ease;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
#otpResendBtn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}