/* ==========================================================================
   Page-Level Layout Styles
   All color/spacing/radius values use var(--xxx) from variables.css
   — zero hardcoded values — to enable one-file theme switching.
   Requirements: 15.1, 15.4, 12.1, 12.2
   ========================================================================== */

/* ==========================================================================
   App Hub — .app-hub
   Compact category panel + main content
   Responsive: 3col ≥1024px, 2col ≥768px, 1col default
   ========================================================================== */
.app-hub {
  display: block;
  min-height: calc(100vh - 3.5rem);
}

.app-hub--with-sidebar {
  display: grid;
  grid-template-columns: 10rem 1fr;
  gap: var(--space-4);
  padding: var(--space-6) var(--space-6) var(--space-6) var(--space-6);
}

/* ==========================================================================
   Category Panel — card-style sidebar (not full-height strip)
   ========================================================================== */
.category-panel {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) 0;
  position: sticky;
  top: 4.5rem; /* below the banner + some gap */
  align-self: start; /* don't stretch to full grid height */
  overflow: hidden;
}

.category-panel__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground);
  border-bottom: 1px solid var(--color-border);
}

.category-panel__list {
  list-style: none;
  padding: var(--space-2) 0 0;
  margin: 0;
}

.category-panel__item {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-muted-foreground);
  cursor: pointer;
  transition: background-color var(--duration-fast) ease, color var(--duration-fast) ease;
  border-left: 3px solid transparent;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.category-panel__item:hover {
  background-color: var(--color-secondary);
  color: var(--color-foreground);
}

.category-panel__item--active {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  border-left-color: var(--color-primary);
  background-color: var(--color-secondary);
}

/* ==========================================================================
   Hub Banner — full-width top bar
   ========================================================================== */
.hub-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-6);
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  box-sizing: border-box;
}

.hub-banner__left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.hub-banner__title {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground);
  margin: 0;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-beta {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
  color: #fff;
  background: linear-gradient(135deg, #6366f1, #a855f7, #ec4899);
  border-radius: 9999px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  vertical-align: middle;
  flex-shrink: 0;
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
}

.hub-banner__back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-md);
  background-color: var(--color-secondary);
  color: var(--color-secondary-foreground);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: var(--transition-colors);
  text-decoration: none;
  flex-shrink: 0;
}

.hub-banner__back:hover {
  background-color: var(--color-secondary-hover);
  text-decoration: none;
}

.hub-banner__right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.hub-banner__user {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.hub-banner__avatar {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  flex-shrink: 0;
}

.hub-banner__user-info {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.2;
}

.hub-banner__user-name {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-foreground);
}

.hub-banner__logout-btn {
  font-size: var(--text-xs);
  color: var(--color-muted-foreground);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  text-decoration: none;
}

.hub-banner__logout-btn:hover {
  color: var(--color-destructive);
  text-decoration: underline;
}

/* Guide / Help link icon */
.hub-banner__guide-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted-foreground);
  cursor: pointer;
  transition: color var(--duration-fast) ease;
  text-decoration: none;
}

.hub-banner__guide-link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* ==========================================================================
   Hub Dropdown — Platform Admin menu
   ========================================================================== */
.hub-dropdown {
  position: relative;
}

.hub-dropdown__trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-foreground);
  background-color: var(--color-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-colors);
  white-space: nowrap;
}

.hub-dropdown__trigger:hover {
  background-color: var(--color-secondary-hover);
}

.hub-dropdown__chevron {
  transition: transform var(--duration-fast) ease;
}

.hub-dropdown__menu--open + .hub-dropdown__chevron,
.hub-dropdown__menu--open ~ .hub-dropdown__chevron {
  transform: rotate(180deg);
}

.hub-dropdown__menu {
  display: none;
  position: absolute;
  top: calc(100% + var(--space-1));
  right: 0;
  min-width: 12rem;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  z-index: 100;
  overflow: hidden;
}

.hub-dropdown__menu--open {
  display: block;
}

.hub-dropdown__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-foreground);
  text-decoration: none;
  transition: background-color var(--duration-fast) ease;
}

.hub-dropdown__item:hover {
  background-color: var(--color-secondary);
  text-decoration: none;
}

/* (category-select removed — replaced by category-panel sidebar) */

/* (old .sidebar removed — replaced by .category-panel) */

/* --------------------------------------------------------------------------
   Main Content Area
   -------------------------------------------------------------------------- */
.main-content {
  padding: 0 var(--space-4);
  max-width: var(--max-content-width);
  width: 100%;
  margin: 0 auto;
}

.main-content__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.main-content__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground);
  margin-bottom: var(--space-0);
}

/* --------------------------------------------------------------------------
   App Hub Toolbar — Search + Sort
   -------------------------------------------------------------------------- */
.app-hub-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.search-bar {
  flex: 1;
  min-width: 12rem;
  position: relative;
}

.search-bar__input {
  width: 100%;
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-10);
  font-size: var(--text-sm);
  background-color: var(--color-input-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition-colors), var(--transition-shadow);
}

.search-bar__input:focus {
  outline: none;
  border-color: var(--color-ring);
  box-shadow: 0 0 0 2px rgba(163, 163, 163, 0.25);
}

.search-bar__icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  width: var(--space-4);
  height: var(--space-4);
  color: var(--color-muted-foreground);
  pointer-events: none;
}

.sort-selector {
  flex-shrink: 0;
}

.sort-selector__select {
  padding: var(--space-2) var(--space-8) var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  background-color: var(--color-input-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  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='%236b7280' d='M6 8.825a.5.5 0 0 1-.354-.146l-4-4a.5.5 0 1 1 .708-.708L6 7.617l3.646-3.646a.5.5 0 1 1 .708.708l-4 4A.5.5 0 0 1 6 8.825z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  transition: var(--transition-colors);
}

.sort-selector__select:focus {
  outline: none;
  border-color: var(--color-ring);
  box-shadow: 0 0 0 2px rgba(163, 163, 163, 0.25);
}

/* --------------------------------------------------------------------------
   App Grid
   -------------------------------------------------------------------------- */
.app-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

/* --------------------------------------------------------------------------
   App Card
   -------------------------------------------------------------------------- */
.app-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  cursor: pointer;
  transition: var(--transition-shadow), var(--transition-transform);
}

.app-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Inactive app — dimmed, click disabled */
.app-card--inactive {
  opacity: 0.5;
  cursor: default;
  pointer-events: none;
}

.app-card__header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.app-card__icon {
  width: var(--space-10);
  height: var(--space-10);
  border-radius: var(--radius-md);
  object-fit: cover;
  flex-shrink: 0;
  background-color: var(--color-neutral-100);
}

.app-card__info {
  flex: 1;
  min-width: 0;
}

.app-card__name {
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground);
  margin-bottom: var(--space-1);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.app-card__category {
  font-size: var(--text-xs);
  color: var(--color-muted-foreground);
}

.app-card__description {
  font-size: var(--text-sm);
  color: var(--color-muted-foreground);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.app-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.app-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-muted-foreground);
}

.app-card__popularity {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.app-card__manage-btn {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  background-color: var(--color-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-colors);
  text-decoration: none;
  pointer-events: auto;
}

.app-card__manage-btn:hover {
  background-color: var(--color-secondary-hover);
  text-decoration: none;
}

.app-card__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.app-card__help-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  color: var(--color-muted-foreground);
  background: var(--color-secondary);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition-colors);
  pointer-events: auto;
  text-decoration: none;
}

.app-card__help-btn:hover {
  color: var(--color-primary);
  background: var(--color-secondary-hover);
  border-color: var(--color-primary);
}

.app-card__help-btn svg {
  display: block;
}

/* --------------------------------------------------------------------------
   Responsive — Medium screens (≥768px): 2 columns
   -------------------------------------------------------------------------- */
@media (min-width: 768px) {
  .app-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --------------------------------------------------------------------------
   Responsive — Large screens (≥1024px): 3 columns
   -------------------------------------------------------------------------- */
@media (min-width: 1024px) {
  .app-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --------------------------------------------------------------------------
   Responsive — Small screens (<768px): category panel collapses
   -------------------------------------------------------------------------- */
@media (max-width: 767px) {
  .hub-banner {
    padding: var(--space-2) var(--space-3);
    gap: var(--space-2);
  }

  .hub-banner__title {
    font-size: var(--text-base);
  }

  .app-hub--with-sidebar {
    grid-template-columns: 1fr;
    padding: var(--space-4);
  }

  .category-panel {
    display: none;
  }

  .main-content {
    padding: 0;
  }

  .app-hub-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
}


/* ==========================================================================
   Register Page — .register-form
   Centered card layout with max-width constraint
   ========================================================================== */
.register-page__header {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-card);
}

.register-page {
  display: flex;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  min-height: calc(100vh - 3.5rem);
}

.register-form {
  width: 100%;
  max-width: 40rem;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-8);
}

/* Inside a floating panel, let the form fill the available width */
.panel .register-form {
  max-width: none;
  border: none;
  box-shadow: none;
  border-radius: 0;
  padding: var(--space-4) var(--space-0);
}

.register-form__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground);
  margin-bottom: var(--space-2);
}

.register-form__subtitle {
  font-size: var(--text-sm);
  color: var(--color-muted-foreground);
  margin-bottom: var(--space-8);
}

.register-form__actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-6);
}

/* ==========================================================================
   App Management Console — .manage-header, .tab-nav, .tab-content
   Header with back button + app icon + title
   Horizontal tab bar with hash-based routing
   ========================================================================== */

/* --------------------------------------------------------------------------
   Manage Page Wrapper
   -------------------------------------------------------------------------- */
.manage-page {
  max-width: var(--max-content-width);
  margin: var(--space-0) auto;
  padding: var(--space-6) var(--space-8);
}

/* Centered container for tab nav + panels — matches register-form width */
.manage-body {
  max-width: 48rem;
  margin-left: auto;
  margin-right: auto;
}

/* Tab nav inside manage-body — sits directly above card */
.manage-body .tab-nav {
  margin-bottom: 0;
  border: 1px solid var(--color-border);
  border-bottom: none;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}
.manage-body .tab-content--active {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-8);
}

/* --------------------------------------------------------------------------
   Manage Header — back button + app icon + title
   -------------------------------------------------------------------------- */
.manage-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.manage-header__back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--space-8);
  height: var(--space-8);
  border-radius: var(--radius-md);
  background-color: var(--color-secondary);
  color: var(--color-secondary-foreground);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: var(--transition-colors);
  text-decoration: none;
  flex-shrink: 0;
}

.manage-header__back:hover {
  background-color: var(--color-secondary-hover);
  text-decoration: none;
}

.manage-header__icon {
  width: var(--space-12);
  height: var(--space-12);
  border-radius: var(--radius-lg);
  object-fit: cover;
  flex-shrink: 0;
  background-color: var(--color-neutral-100);
}

.manage-header__info {
  flex: 1;
  min-width: 0;
}

.manage-header__title {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground);
  margin-bottom: var(--space-1);
}

.manage-header__subtitle {
  font-size: var(--text-sm);
  color: var(--color-muted-foreground);
}

/* --------------------------------------------------------------------------
   Tab Navigation — pill / segment style
   -------------------------------------------------------------------------- */
.tab-nav {
  display: flex;
  background-color: var(--color-neutral-100);
  border-radius: var(--radius-lg);
  padding: var(--space-1);
  margin-bottom: var(--space-6);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tab-nav::-webkit-scrollbar {
  display: none;
}

.tab-nav__item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  flex: 1;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-muted-foreground);
  background: none;
  border: none;
  border-radius: calc(var(--radius-lg) - 2px);
  cursor: pointer;
  white-space: nowrap;
  text-align: center;
  transition: color var(--duration-fast) ease,
    background-color var(--duration-fast) ease,
    box-shadow var(--duration-fast) ease;
}

.tab-nav__item:hover {
  color: var(--color-muted-foreground);
  background-color: rgba(0, 0, 0, 0.04);
}

.tab-nav__item--active {
  color: var(--color-foreground);
  background-color: var(--color-card);
  border-radius: calc(var(--radius-lg) - 2px);
  box-shadow: var(--shadow-sm);
}

/* --------------------------------------------------------------------------
   Tab Content Panel
   -------------------------------------------------------------------------- */
.tab-content {
  display: none;
}

.tab-content--active {
  display: block;
}

.tab-content__section {
  margin-bottom: var(--space-8);
}

.tab-content__section-title {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground);
  margin-bottom: var(--space-4);
}

/* --------------------------------------------------------------------------
   Permission Denied Card
   -------------------------------------------------------------------------- */
.permission-denied {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-16) var(--space-6);
  max-width: 28rem;
  margin: var(--space-0) auto;
}

.permission-denied__icon {
  width: var(--space-16);
  height: var(--space-16);
  color: var(--color-muted-foreground);
  margin-bottom: var(--space-6);
}

.permission-denied__title {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground);
  margin-bottom: var(--space-2);
}

.permission-denied__message {
  font-size: var(--text-sm);
  color: var(--color-muted-foreground);
  margin-bottom: var(--space-6);
}

/* --------------------------------------------------------------------------
   Not Found Card
   -------------------------------------------------------------------------- */
.not-found {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-16) var(--space-6);
  max-width: 28rem;
  margin: var(--space-0) auto;
}

.not-found__icon {
  width: var(--space-16);
  height: var(--space-16);
  color: var(--color-muted-foreground);
  margin-bottom: var(--space-6);
}

.not-found__title {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-foreground);
  margin-bottom: var(--space-2);
}

.not-found__message {
  font-size: var(--text-sm);
  color: var(--color-muted-foreground);
  margin-bottom: var(--space-6);
}

/* --------------------------------------------------------------------------
   Access Mode Radio Group — compact inline radios
   -------------------------------------------------------------------------- */
.access-mode-options {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-2);
}

.access-mode-options label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition-colors);
}

.access-mode-options label:hover {
  background-color: var(--color-secondary);
}

.access-mode-options input[type="radio"] {
  margin: 0;
  flex-shrink: 0;
  width: auto;
  display: inline-block;
}

.access-mode-options .access-mode__text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.access-mode-options .access-mode__name {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-foreground);
  line-height: 1.2;
}

.access-mode-options .access-mode__desc {
  font-size: var(--text-xs);
  color: var(--color-muted-foreground);
  line-height: 1.3;
}

/* --------------------------------------------------------------------------
   Settings Actions — sticky bottom bar with Cancel / Save
   -------------------------------------------------------------------------- */
.settings-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) 0 0;
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-4);
}

/* --------------------------------------------------------------------------
   Responsive — Small screens for manage page
   -------------------------------------------------------------------------- */
@media (max-width: 767px) {
  .manage-page {
    padding: var(--space-4);
  }

  .manage-header {
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .manage-header__icon {
    width: var(--space-10);
    height: var(--space-10);
  }

  .register-form {
    padding: var(--space-5);
  }

  .manage-body .tab-content--active {
    padding: var(--space-5);
  }

  .tab-nav__item {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }
}