/* ===========================================
   PREMIUM AUTH FORMS
   Premium UI Design System
   Font: Figtree | Flat Colors | 8pt Grid
   =========================================== */

/* ===========================================
   AUTH PAGE LAYOUT
   =========================================== */
.auth-page {
  font-family: var(--font-family);
  background: var(--bg-base);
  color: var(--text-secondary);
  line-height: var(--leading-body);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
}

.auth-container {
  width: 100%;
  max-width: 420px;
  background: var(--bg-surface);
  border: var(--border-thin) solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

/* ===========================================
   AUTH HEADER
   =========================================== */
.auth-header {
  text-align: left;
  margin-bottom: var(--space-5);
}

.auth-title {
  font-size: var(--text-display);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-display);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.auth-subtitle {
  font-size: var(--text-body);
  color: var(--text-secondary);
}

/* ===========================================
   TAB NAVIGATION
   =========================================== */
.auth-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  padding: var(--space-1);
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
}

.auth-tab {
  flex: 1;
  padding: var(--space-2);
  text-align: center;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  font-family: var(--font-family);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--easing-base);
}

.auth-tab:hover {
  color: var(--text-primary);
}

.auth-tab.is-active {
  background: var(--bg-surface);
  color: var(--text-primary);
  font-weight: var(--weight-semibold);
  box-shadow: var(--shadow-sm);
}

/* ===========================================
   FORM FIELDS
   =========================================== */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.auth-label {
  font-family: var(--font-family);
  font-size: var(--text-caption);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-caption);
  color: var(--text-secondary);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.auth-input {
  font-family: var(--font-family);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  line-height: var(--leading-body);
  color: var(--text-primary);
  background: var(--bg-surface);
  border: var(--border-thin) solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  width: 100%;
  transition: border-color var(--duration-fast) var(--easing-base),
              box-shadow var(--duration-fast) var(--easing-base);
}

.auth-input::placeholder {
  color: var(--text-muted);
}

.auth-input:hover {
  border-color: var(--neutral-400);
}

.auth-input:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
}

.auth-input:disabled {
  background: var(--neutral-100);
  color: var(--text-disabled);
  cursor: not-allowed;
}

/* Password Toggle */
.auth-password-wrapper {
  position: relative;
}

.auth-password-toggle {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: var(--space-1);
  transition: color var(--duration-fast) var(--easing-base);
}

.auth-password-toggle:hover {
  color: var(--text-secondary);
}

/* ===========================================
   BUTTONS
   =========================================== */
.auth-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.auth-btn {
  font-family: var(--font-family);
  font-size: var(--text-body);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-body);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: var(--border-thin) solid transparent;
  cursor: pointer;
  transition: background var(--duration-fast) var(--easing-base),
              border-color var(--duration-fast) var(--easing-base),
              transform var(--duration-fast) var(--easing-base);
  text-decoration: none;
  white-space: nowrap;
}

.auth-btn:hover {
  transform: translateY(-1px);
}

.auth-btn:active {
  transform: translateY(0);
}

.auth-btn-primary {
  background: var(--accent);
  color: var(--neutral-0);
  border-color: var(--accent);
}

.auth-btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.auth-btn-primary:active {
  background: var(--accent-active);
  border-color: var(--accent-active);
}

.auth-btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.auth-btn-secondary:hover {
  background: var(--bg-subtle);
}

.auth-btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.auth-btn-ghost:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.auth-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===========================================
   DIVIDER
   =========================================== */
.auth-divider {
  display: flex;
  align-items: center;
  margin: var(--space-3) 0;
  color: var(--text-muted);
}

.auth-divider::before {
  content: "";
  flex: 1;
  height: var(--border-thin);
  background: var(--border-default);
}

.auth-divider span {
  padding: 0 var(--space-3);
  font-size: var(--text-caption);
  font-weight: var(--weight-regular);
}

.auth-divider::after {
  content: "";
  flex: 1;
  height: var(--border-thin);
  background: var(--border-default);
}

/* ===========================================
   STATUS MESSAGES
   =========================================== */
.auth-status {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  margin-bottom: var(--space-4);
}

.auth-status-success {
  background: var(--success-bg);
  color: var(--success-text);
  border: var(--border-thin) solid var(--success-border);
}

.auth-status-error {
  background: var(--danger-bg);
  color: var(--danger-text);
  border: var(--border-thin) solid var(--danger-border);
}

.auth-status-warning {
  background: var(--warning-bg);
  color: var(--warning-text);
  border: var(--border-thin) solid var(--warning-border);
}

/* ===========================================
   SOCIAL BUTTONS
   =========================================== */
.auth-social {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.auth-social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  background: var(--bg-surface);
  border: var(--border-thin) solid var(--border-strong);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  color: var(--text-primary);
  text-decoration: none;
  transition: background var(--duration-fast) var(--easing-base),
              border-color var(--duration-fast) var(--easing-base);
}

.auth-social-btn:hover {
  background: var(--bg-subtle);
  border-color: var(--neutral-400);
}

.auth-social-icon {
  width: 20px;
  height: 20px;
}

/* ===========================================
   FOOTER LINKS
   =========================================== */
.auth-footer {
  text-align: center;
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: var(--border-thin) solid var(--border-default);
}

.auth-footer-text {
  font-size: var(--text-body);
  color: var(--text-secondary);
}

.auth-footer-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: var(--weight-semibold);
  transition: color var(--duration-fast) var(--easing-base);
}

.auth-footer-link:hover {
  color: var(--accent-hover);
}

/* ===========================================
   INLINE ERROR MESSAGE
   =========================================== */
#auth-error-msg {
  display: none;
}

/* ===========================================
   LOADING STATE
   =========================================== */
.auth-btn-loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.auth-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: auth-spinner 0.6s linear infinite;
}

@keyframes auth-spinner {
  from {
    transform: rotate(0turn);
  }
  to {
    transform: rotate(1turn);
  }
}

/* ===========================================
   CHECKBOX & RADIO
   =========================================== */
.auth-checkbox-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.auth-checkbox {
  appearance: none;
  width: 20px;
  height: 20px;
  border: var(--border-thin) solid var(--border-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-fast) var(--easing-base);
  position: relative;
}

.auth-checkbox:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.auth-checkbox:checked::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--neutral-0);
  border-radius: var(--radius-sm);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.auth-checkbox:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.auth-checkbox-label {
  font-size: var(--text-body);
  color: var(--text-secondary);
}

.auth-checkbox-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: var(--weight-semibold);
}

.auth-checkbox-link:hover {
  color: var(--accent-hover);
}

/* ===========================================
   ROLE SELECTION
   =========================================== */
.auth-role-selection {
  margin-bottom: var(--space-5);
}

.auth-role-title {
  font-size: var(--text-heading);
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.auth-role-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.auth-role-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--bg-surface);
  border: var(--border-thin) solid var(--border-default);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--duration-fast) var(--easing-base);
}

.auth-role-option:hover {
  border-color: var(--accent);
}

.auth-role-option.is-selected {
  background: var(--color-50);
  border-color: var(--accent);
}

.auth-role-icon {
  width: 48px;
  height: 48px;
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-heading);
}

.auth-role-label {
  font-size: var(--text-body);
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
}

.auth-role-description {
  font-size: var(--text-caption);
  color: var(--text-muted);
  text-align: center;
}

/* ===========================================
   PASSWORD STRENGTH
   =========================================== */
.auth-password-strength {
  height: var(--border-thin);
  background: var(--border-default);
  border-radius: var(--radius-sm);
  margin-top: var(--space-2);
  overflow: hidden;
}

.auth-password-strength-bar {
  height: 100%;
  transition: width var(--duration-base) var(--easing-base);
  border-radius: var(--radius-sm);
}

.auth-password-strength-weak {
  width: 25%;
  background: var(--danger-text);
}

.auth-password-strength-fair {
  width: 50%;
  background: var(--warning-text);
}

.auth-password-strength-good {
  width: 75%;
  background: var(--accent);
}

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

.auth-password-hint {
  font-size: var(--text-caption);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

/* ===========================================
   RESPONSIVE
   =========================================== */
@media (max-width: 480px) {
  .auth-container {
    padding: var(--space-5);
  }

  .auth-title {
    font-size: var(--text-heading);
    line-height: var(--leading-heading);
  }

  .auth-role-options {
    grid-template-columns: 1fr;
  }
}

/* ===========================================
   ANIMATIONS
   =========================================== */
@keyframes authFadeIn {
  from {
    opacity: 0;
    transform: translateY(var(--space-2));
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.auth-container {
  animation: authFadeIn var(--duration-base) var(--easing-base);
}