* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-container {
  width: 100%;
  max-width: 420px;
}

.login-card {
  background: white;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  padding: 40px;
}

.logo {
  text-align: center;
  margin-bottom: 32px;
}

.logo h1 {
  font-size: 24px;
  font-weight: 700;
  color: #333;
}

.step h2 {
  font-size: 20px;
  font-weight: 600;
  color: #333;
  margin-bottom: 24px;
  text-align: center;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: #555;
  margin-bottom: 8px;
}

.form-group input {
  width: 100%;
  padding: 14px 16px;
  font-size: 16px;
  border: 2px solid #e1e5eb;
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
  border-color: #0066cc;
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group input::placeholder {
  color: #aab;
}

.error-message {
  display: none;
  font-size: 13px;
  color: #dc3545;
  margin-top: 6px;
}

.error-banner {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #dc2626;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-top: 16px;
}

.btn-primary {
  width: 100%;
  padding: 14px 24px;
  font-size: 16px;
  font-weight: 600;
  color: white;
  background: #0066cc;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary:hover:not(:disabled) {
  background: #0052a3;
}

.btn-primary:active:not(:disabled) {
  transform: scale(0.98);
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-back {
  background: none;
  border: none;
  color: #666;
  font-size: 14px;
  cursor: pointer;
  padding: 8px 0;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color 0.2s;
}

.btn-back:hover {
  color: #333;
}

.btn-loading {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.totp-description {
  font-size: 14px;
  color: #666;
  text-align: center;
  margin-bottom: 24px;
}

.email-display {
  font-size: 14px;
  color: #666;
  text-align: center;
  margin-bottom: 24px;
  word-break: break-all;
}

.passkey-option {
  margin-top: 20px;
  text-align: center;
}

.btn-link {
  background: none;
  border: none;
  color: #0066cc;
  font-size: 14px;
  cursor: pointer;
  padding: 8px 0;
  text-decoration: underline;
  transition: color 0.2s;
}

.btn-link:hover {
  color: #0052a3;
}

#totp-code {
  text-align: center;
  font-size: 24px;
  letter-spacing: 8px;
  font-weight: 600;
}

/* Responsive adjustments */
@media (max-width: 480px) {
  .login-card {
    padding: 32px 24px;
  }

  .logo h1 {
    font-size: 20px;
  }

  .step h2 {
    font-size: 18px;
  }
}