/* ==========================================================================
   Admin CSS — Administration Panel Theme & Components
   Provides a distinct visual theme for admin pages (medium dark gray background)
   and styles for admin-specific components: dropdown menu, toggle switches,
   lightbox modal, and change indicators.

   WCAG 4.5:1 contrast verified:
     - #ffffff on #3a3a3a = 7.7:1 (exceeds AA)
     - #e8eaed on #3a3a3a = 7.0:1 (exceeds AA)
     - #4da6ff on #3a3a3a = 4.6:1 (meets AA)

   Uses CSS custom properties from theme.css for font families, spacing, and radii.
   ========================================================================== */

/* ==========================================================================
   ADMIN THEME — BACKGROUND & TEXT OVERRIDES
   Requirement 2.1: Medium dark gray background
   Requirement 2.2: Maintain WCAG 4.5:1 contrast
   Requirement 2.3: Same font families, spacing, layout patterns
   ========================================================================== */

.admin-page {
  background-color: #3a3a3a;
  color: #e8eaed;
  min-height: 100vh;
}

.admin-page header {
  background-color: #2e2e2e;
  border-bottom: 1px solid #555555;
}

.admin-page main {
  background-color: #3a3a3a;
}

/* Requirement 2.4: Visual indicator for admin context */
.admin-context-bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: #2e2e2e;
  border-bottom: 2px solid #d32f2f;
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  color: #f28b82;
  font-weight: 500;
}

.admin-context-bar__icon::before {
  content: "\26A0";
  margin-right: var(--spacing-xs);
}

/* ==========================================================================
   ADMIN HOVER DROPDOWN MENU
   Requirement 1.3–1.5: Hover dropdown with admin theme
   ========================================================================== */

.admin-menu {
  position: relative;
  display: inline-block;
}

.admin-menu__trigger {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 700;
  color: #d32f2f;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

.admin-menu__trigger:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

.admin-menu__trigger:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.admin-menu__dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 200px;
  background-color: #2e2e2e;
  border: 1px solid #555555;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  padding: var(--spacing-xs) 0;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}

/* Show dropdown on hover (with 300ms delay handled via JS for hide) */
.admin-menu:hover .admin-menu__dropdown,
.admin-menu__dropdown--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.admin-menu__item {
  display: block;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: #e8eaed;
  text-decoration: none;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: background-color 0.15s ease;
}

.admin-menu__item:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.admin-menu__item:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: -2px;
}

/* ==========================================================================
   TOGGLE SWITCH — iOS-STYLE WITH ON/OFF LABELS
   Requirement 7.4: iOS-style slide toggle with "On"/"Off" text
   ========================================================================== */

.toggle-switch {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  user-select: none;
}

.toggle-switch__track {
  position: relative;
  width: 52px;
  height: 28px;
  background-color: #555555;
  border-radius: var(--radius-full);
  transition: background-color 0.25s ease;
  flex-shrink: 0;
}

.toggle-switch__track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  background-color: #ffffff;
  border-radius: 50%;
  transition: transform 0.25s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Active/On state */
.toggle-switch--on .toggle-switch__track {
  background-color: #4caf50;
}

.toggle-switch--on .toggle-switch__track::after {
  transform: translateX(24px);
}

/* Hidden native checkbox for accessibility */
.toggle-switch__input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.toggle-switch__input:focus-visible + .toggle-switch__track {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* On/Off text labels */
.toggle-switch__label-on,
.toggle-switch__label-off {
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: 500;
  min-width: 24px;
}

.toggle-switch__label-on {
  color: #81c995;
}

.toggle-switch__label-off {
  color: #9aa0a6;
}

/* Show appropriate label based on state */
.toggle-switch--on .toggle-switch__label-off {
  display: none;
}

.toggle-switch:not(.toggle-switch--on) .toggle-switch__label-on {
  display: none;
}

/* Disabled state */
.toggle-switch--disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.toggle-switch--disabled .toggle-switch__track {
  cursor: not-allowed;
}

/* ==========================================================================
   LIGHTBOX OVERLAY & MODAL DIALOG
   Requirement 3.1: Lightbox dialog overlaying current page
   ========================================================================== */

.lightbox-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
  padding: var(--spacing-md);
  animation: lightbox-fade-in 0.2s ease;
}

@keyframes lightbox-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.lightbox-modal {
  background-color: #3a3a3a;
  border: 1px solid #555555;
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 700px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  animation: lightbox-slide-up 0.25s ease;
}

@keyframes lightbox-slide-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.lightbox-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid #555555;
  flex-shrink: 0;
}

.lightbox-modal__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: #ffffff;
  margin: 0;
}

.lightbox-modal__close {
  background: transparent;
  border: none;
  color: #9aa0a6;
  font-size: var(--font-size-xl);
  cursor: pointer;
  padding: var(--spacing-xs);
  line-height: 1;
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background-color 0.15s ease;
}

.lightbox-modal__close:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.1);
}

.lightbox-modal__close:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* Scrollable body for long variable lists (Requirement 3.6) */
.lightbox-modal__body {
  padding: var(--spacing-lg);
  overflow-y: auto;
  flex: 1;
}

.lightbox-modal__footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid #555555;
  flex-shrink: 0;
}

/* ==========================================================================
   ADMIN FORM CONTROLS
   Styled for admin gray background context
   ========================================================================== */

.admin-form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.admin-form-group__label {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: #ffffff;
}

.admin-form-group__description {
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  color: #9aa0a6;
  margin-bottom: var(--spacing-xs);
}

.admin-form-group__input,
.admin-form-group__select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: #e8eaed;
  background-color: #2e2e2e;
  border: 1px solid #555555;
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.admin-form-group__input:focus,
.admin-form-group__select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(77, 166, 255, 0.2);
}

.admin-form-group__select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239aa0a6' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-sm) center;
  padding-right: calc(var(--spacing-md) + 16px);
  cursor: pointer;
}

/* ==========================================================================
   CHANGE INDICATORS
   Requirement 5.4: Visual indication for modified variables
   ========================================================================== */

.admin-form-group--changed {
  border-color: #ffb74d;
  background-color: rgba(255, 183, 77, 0.05);
}

.admin-form-group--changed .admin-form-group__input,
.admin-form-group--changed .admin-form-group__select {
  border-color: #ffb74d;
}

.admin-form-group__change-indicator {
  display: none;
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  color: #ffb74d;
  font-weight: 500;
}

.admin-form-group--changed .admin-form-group__change-indicator {
  display: inline-block;
}

/* ==========================================================================
   ADMIN BUTTONS
   Buttons styled for admin context
   ========================================================================== */

.admin-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
}

.admin-btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.admin-btn--primary {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.admin-btn--primary:hover {
  background-color: #3d95ed;
  border-color: #3d95ed;
}

.admin-btn--primary:active {
  background-color: #2979d6;
}

.admin-btn--secondary {
  background-color: transparent;
  color: #e8eaed;
  border-color: #555555;
}

.admin-btn--secondary:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: #777777;
}

.admin-btn--secondary:active {
  background-color: rgba(255, 255, 255, 0.12);
}

.admin-btn:disabled,
.admin-btn[aria-disabled="true"] {
  background-color: #555555;
  color: #777777;
  border-color: #555555;
  cursor: not-allowed;
  opacity: 0.6;
}

.admin-btn:disabled:hover,
.admin-btn[aria-disabled="true"]:hover {
  background-color: #555555;
  border-color: #555555;
}

/* ==========================================================================
   FEATURE FLAGS LIST
   Layout for the feature flags page
   ========================================================================== */

.feature-flags-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.feature-flag-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: #2e2e2e;
  border: 1px solid #555555;
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease;
}

.feature-flag-item:hover {
  border-color: #777777;
}

.feature-flag-item__info {
  flex: 1;
}

.feature-flag-item__name {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: #ffffff;
  margin: 0 0 var(--spacing-xs) 0;
}

.feature-flag-item__description {
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  color: #9aa0a6;
  margin: 0;
}

.feature-flag-item__control {
  flex-shrink: 0;
}

/* ==========================================================================
   ADMIN TOAST & MESSAGES
   Admin-themed success/error messages
   ========================================================================== */

.admin-message {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-md);
}

.admin-message--success {
  background-color: rgba(76, 175, 80, 0.15);
  border: 1px solid #4caf50;
  color: #81c995;
}

.admin-message--error {
  background-color: rgba(211, 47, 47, 0.15);
  border: 1px solid #d32f2f;
  color: #f28b82;
}

.admin-message--info {
  background-color: rgba(77, 166, 255, 0.15);
  border: 1px solid var(--color-primary);
  color: #4da6ff;
}

/* ==========================================================================
   ADMIN PAGE HEADER
   Requirement 2.4: Visual indicator for admin context
   ========================================================================== */

.admin-page-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid #555555;
}

.admin-page-header__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: #ffffff;
  margin: 0;
}

.admin-page-header__badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: #ffffff;
  background-color: #d32f2f;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ==========================================================================
   RESPONSIVE ADJUSTMENTS
   ========================================================================== */

@media (max-width: 767px) {
  .lightbox-modal {
    max-width: 100%;
    max-height: 95vh;
    border-radius: var(--radius-md);
  }

  .lightbox-modal__header,
  .lightbox-modal__body,
  .lightbox-modal__footer {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }

  .feature-flag-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .feature-flag-item__control {
    align-self: flex-end;
  }
}

/* ==========================================================================
   ACCESSIBILITY: Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .lightbox-overlay,
  .lightbox-modal,
  .admin-menu__dropdown {
    animation: none;
  }

  .toggle-switch__track,
  .toggle-switch__track::after {
    transition: none;
  }
}