/* Authentication Page Styles */

.auth-section {
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  padding: var(--gap-lg) 0;
}

.auth-container {
  max-width: 400px;
  margin: 0 auto;
  width: 100%;
}

.auth-toggle {
  display: flex;
  background: var(--surface);
  border: var(--stroke) solid var(--outline);
  border-radius: var(--radius-sm);
  margin-bottom: var(--gap-md);
  padding: 4px;
}

.auth-tab {
  flex: 1;
  padding: 12px 16px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.auth-tab.active {
  background: var(--accent-2);
  color: var(--text);
}

.auth-tab:hover:not(.active) {
  background: var(--bg);
}

.auth-form {
  transition: all 0.3s ease;
}

.auth-form.hidden {
  display: none;
}

.auth-form .card-neo {
  padding: var(--gap-lg);
  text-align: center;
}

.auth-form h2 {
  margin-bottom: var(--gap-xs);
}

.auth-form p {
  color: var(--text-secondary);
  margin-bottom: var(--gap-lg);
}

.form {
  text-align: left;
}

.form-group {
  margin-bottom: var(--gap-md);
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--gap-xs);
  color: var(--text);
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--outline);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  transition: border-color 0.2s ease;
}

.form-input:focus {
  outline: 3px solid var(--accent-3);
  outline-offset: 2px;
}

.form-input::placeholder {
  color: var(--text-secondary);
}

.form-help {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--gap-md);
  font-size: 14px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--gap-xs);
  cursor: pointer;
  font-weight: 400;
}

.checkbox-label input[type="checkbox"] {
  margin: 0;
  transform: scale(1.1);
}

.forgot-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s ease;
}

.forgot-link:hover {
  color: var(--text);
}

.auth-submit {
  width: 100%;
  margin-bottom: var(--gap-md);
  padding: 14px;
  font-size: 16px;
}

.auth-divider {
  position: relative;
  text-align: center;
  margin: var(--gap-md) 0;
  color: var(--text-secondary);
  font-size: 14px;
}

.auth-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--outline);
  z-index: 1;
}

.auth-divider span {
  background: var(--surface);
  padding: 0 var(--gap-sm);
  position: relative;
  z-index: 2;
}

.social-auth {
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
}

.btn-social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--gap-sm);
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--outline);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-social:hover {
  background: var(--bg);
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
}

.btn-google {
  border-color: #4285f4;
  color: #4285f4;
}

.btn-google:hover {
  background: #4285f4;
  color: white;
}

/* Auth Features */
.auth-features {
  background: var(--bg);
  padding: var(--gap-lg) 0;
  margin-top: var(--gap-lg);
}

.auth-features h2 {
  text-align: center;
  margin-bottom: var(--gap-lg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--gap-md);
}

.feature-preview {
  text-align: center;
  padding: var(--gap-md);
}

.feature-preview .feature-icon {
  font-size: 48px;
  margin-bottom: var(--gap-sm);
}

.feature-preview h3 {
  margin-bottom: var(--gap-sm);
  font-size: 18px;
}

.feature-preview p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.4;
}

/* Form Validation States */
.form-input:invalid {
  border-color: var(--error);
}

.form-input:valid {
  border-color: var(--success);
}

.form-error {
  color: var(--error);
  font-size: 12px;
  margin-top: 4px;
  display: none;
}

.form-group.error .form-error {
  display: block;
}

.form-group.error .form-input {
  border-color: var(--error);
}

/* Loading State */
.auth-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.auth-submit.loading {
  position: relative;
}

.auth-submit.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  transform: translate(-50%, -50%);
}

@keyframes spin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Password Strength Indicator */
.password-strength {
  margin-top: 4px;
  height: 4px;
  background: var(--bg);
  border-radius: 2px;
  overflow: hidden;
}

.password-strength-bar {
  height: 100%;
  width: 0%;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.password-strength-weak .password-strength-bar {
  width: 33%;
  background: var(--error);
}

.password-strength-medium .password-strength-bar {
  width: 66%;
  background: var(--warning);
}

.password-strength-strong .password-strength-bar {
  width: 100%;
  background: var(--success);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .auth-container {
    margin: 0 var(--gap-sm);
  }
  
  .auth-form .card-neo {
    padding: var(--gap-md);
  }
  
  .form-options {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--gap-xs);
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .auth-form,
  .auth-tab,
  .btn-social,
  .form-input {
    transition: none;
  }
  
  .auth-submit.loading::after {
    animation: none;
  }
}

/* Focus management */
.auth-form:target .form-input:first-of-type {
  animation: focusIn 0.3s ease;
}

@keyframes focusIn {
  from {
    transform: scale(0.95);
    opacity: 0.8;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}