/**
 * Documentation hub layout and components.
 *
 * @package NotifalDoc
 */

/* Panel visibility (class-based; do not rely on [hidden] inside Fluent Community). */
.notifal-doc-panel {
  display: none !important;
}

.notifal-doc-panel.notifal-doc-panel--active {
  display: block !important;
}

.notifal-doc-topic-card,
#notifal-doc-topic-articles-grid .notifal-doc-article-card {
  display: none !important;
}

.notifal-doc-topic-card.notifal-doc-card--active {
  display: flex !important;
}

#notifal-doc-topic-articles-grid .notifal-doc-article-card.notifal-doc-card--active {
  display: flex !important;
}

.notifal-doc-empty-hint {
  display: none !important;
}

.notifal-doc-empty-hint.notifal-doc-panel--active {
  display: block !important;
}

#notifal-doc-search-clear {
  display: none !important;
}

#notifal-doc-search-clear.notifal-doc-panel--active {
  display: inline-flex !important;
}

/* Hero section with brand gradient background. */
.notifal-doc-hero {
  background: var(--nd-grad-hero);
  padding: 3rem 0 2.5rem;
  border-bottom: 1px solid var(--nd-clr-border);
}

.notifal-doc-hero-eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--nd-clr-primary);
}

.notifal-doc-hero-title {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.notifal-doc-hero-description {
  margin: 0 0 2rem;
  max-width: 36rem;
  font-size: 1.1rem;
  color: var(--nd-clr-text-secondary);
}

/* Prominent search bar (Stripe/Intercom-style). */
.notifal-doc-search {
  position: relative;
  max-width: 640px;
}

.notifal-doc-search__field {
  position: relative;
  display: flex;
  align-items: center;
}

.notifal-doc-search__icon {
  position: absolute;
  left: 1.1rem;
  color: var(--nd-clr-text-muted);
  pointer-events: none;
}

.notifal-doc-search__input {
  width: 100%;
  padding: 1rem 3.25rem 1rem 3rem;
  font-size: 1.05rem;
  font-family: inherit;
  color: var(--nd-clr-text-primary);
  background: var(--nd-clr-bg-white);
  border: 1px solid var(--nd-clr-border);
  border-radius: var(--nd-radius-lg);
  box-shadow: var(--nd-shadow-lg);
  transition: border-color var(--nd-duration) var(--nd-ease-out), box-shadow var(--nd-duration) var(--nd-ease-out);
}

.notifal-doc-search__input::placeholder {
  color: var(--nd-clr-text-muted);
}

.notifal-doc-search.is-focused .notifal-doc-search__input,
.notifal-doc-search__input:focus {
  border-color: var(--nd-clr-primary-mid);
  box-shadow: var(--nd-shadow-xl);
}

.notifal-doc-search__shortcut {
  position: absolute;
  right: 1rem;
  padding: 0.2rem 0.45rem;
  font-size: 0.75rem;
  font-family: inherit;
  color: var(--nd-clr-text-muted);
  background: var(--nd-clr-bg-subtle);
  border: 1px solid var(--nd-clr-border);
  border-radius: var(--nd-radius-sm);
}

/* Search results panel sits directly below hero, above browse panels. */
.notifal-doc-search-results-section {
  padding-top: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--nd-clr-border);
  background: var(--nd-clr-bg-white);
}

.notifal-doc-search__loading {
  margin: 0;
  padding: 1rem 0;
  color: var(--nd-clr-text-muted);
}

.notifal-doc-section-lead {
  margin: -0.75rem 0 1.5rem;
  color: var(--nd-clr-text-secondary);
  font-size: 0.95rem;
}

.notifal-doc-panel-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  margin-bottom: 1.5rem;
}

.notifal-doc-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.85rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--nd-clr-primary);
  text-decoration: none;
  background: var(--nd-clr-bg-subtle);
  border: 1px solid var(--nd-clr-border);
  border-radius: var(--nd-radius-full);
  cursor: pointer;
  transition: background var(--nd-duration) var(--nd-ease-out), border-color var(--nd-duration) var(--nd-ease-out);
}

.notifal-doc-back-btn:hover {
  border-color: var(--nd-clr-border-strong);
  background: var(--nd-clr-bg-white);
}

.notifal-doc-subview .notifal-doc-section-title {
  margin: 0;
}

/* Category card grid. */
.notifal-doc-category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.notifal-doc-category-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.85rem;
  width: 100%;
  padding: 1.25rem;
  text-align: left;
  font-family: inherit;
  color: inherit;
  text-decoration: none;
  background: var(--nd-clr-bg-white);
  border: 1px solid var(--nd-clr-border);
  border-radius: var(--nd-radius-md);
  box-shadow: var(--nd-shadow-sm);
  cursor: pointer;
  transition: border-color var(--nd-duration) var(--nd-ease-out), box-shadow var(--nd-duration) var(--nd-ease-out), transform var(--nd-duration) var(--nd-ease-out);
}

.notifal-doc-category-card:hover {
  border-color: var(--nd-clr-border-strong);
  box-shadow: var(--nd-shadow-md);
  transform: translateY(-2px);
}

.notifal-doc-category-card.is-active,
.notifal-doc-category-card[aria-pressed="true"] {
  border-color: var(--nd-clr-primary-mid);
  box-shadow: 0 0 0 1px var(--nd-clr-primary-mid), var(--nd-shadow-md);
}

.notifal-doc-category-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--nd-clr-primary);
  background: var(--nd-clr-bg-subtle);
  border-radius: var(--nd-radius-sm);
}

.notifal-doc-category-card__name {
  display: block;
  font-size: 1rem;
  font-weight: 700;
}

.notifal-doc-category-card__description {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: var(--nd-clr-text-secondary);
  line-height: 1.45;
}

.notifal-doc-category-card__count {
  margin-top: auto;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--nd-clr-primary);
}

/* Article list header with filter tabs. */
.notifal-doc-articles-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  margin-bottom: 1.5rem;
}

.notifal-doc-filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.notifal-doc-filter-tab {
  padding: 0.45rem 0.9rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--nd-clr-text-secondary);
  background: transparent;
  border: 1px solid var(--nd-clr-border);
  border-radius: var(--nd-radius-full);
  cursor: pointer;
  transition: background var(--nd-duration) var(--nd-ease-out), color var(--nd-duration) var(--nd-ease-out), border-color var(--nd-duration) var(--nd-ease-out);
}

.notifal-doc-filter-tab:hover {
  border-color: var(--nd-clr-border-strong);
  color: var(--nd-clr-text-primary);
}

.notifal-doc-filter-tab.is-active {
  color: #fff;
  background: var(--nd-grad-brand);
  border-color: transparent;
}

/* Article card grid. */
.notifal-doc-article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.notifal-doc-article-card {
  display: flex;
}

#notifal-doc-topic-articles-grid .notifal-doc-article-card.notifal-doc-card--active {
  display: flex !important;
}

/* Legacy [hidden] support on article cards inside search results grid. */
.notifal-doc-article-card[hidden] {
  display: none !important;
}

.notifal-doc-article-card__link {
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: 1.25rem;
  text-decoration: none;
  color: inherit;
  background: var(--nd-clr-bg-white);
  border: 1px solid var(--nd-clr-border);
  border-radius: var(--nd-radius-md);
  box-shadow: var(--nd-shadow-sm);
  transition: border-color var(--nd-duration) var(--nd-ease-out), box-shadow var(--nd-duration) var(--nd-ease-out), transform var(--nd-duration) var(--nd-ease-out);
}

.notifal-doc-article-card__link:hover {
  border-color: var(--nd-clr-border-strong);
  box-shadow: var(--nd-shadow-md);
  transform: translateY(-2px);
}

.notifal-doc-article-card__badge {
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 0.75rem;
  padding: 0.2rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--nd-clr-primary);
  background: var(--nd-clr-bg-subtle);
  border-radius: var(--nd-radius-full);
}

.notifal-doc-article-card__title {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.35;
}

.notifal-doc-article-card__excerpt {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  color: var(--nd-clr-text-secondary);
  line-height: 1.5;
}

.notifal-doc-article-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: auto;
  font-size: 0.8rem;
  color: var(--nd-clr-text-muted);
}

.notifal-doc-empty-state {
  margin: 2rem 0 0;
  padding: 2rem;
  text-align: center;
  color: var(--nd-clr-text-secondary);
  background: var(--nd-clr-bg-subtle);
  border-radius: var(--nd-radius-md);
}

/* Responsive adjustments. */
@media (max-width: 768px) {
  .notifal-doc-hero {
    padding: 2.5rem 0 2rem;
  }

  .notifal-doc-search__shortcut {
    display: none;
  }
}

@media (max-width: 375px) {
  .notifal-doc-container {
    width: calc(100% - 1.25rem);
  }

  .notifal-doc-category-grid,
  .notifal-doc-article-grid {
    grid-template-columns: 1fr;
  }
}