/**
 * Витрина «База знаний».
 * Типографика ориентирована на актуальные DS-страницы темы.
 */

.knowledge-base-page {
  background: var(--surface-card);
}

.knowledge-base-page__controls,
.knowledge-base-page__grid,
.knowledge-base-page__empty,
.knowledge-base-page__pagination {
  margin-bottom: var(--section-gap);
}

.knowledge-base-page__hero {
  max-width: 860px;
  margin-bottom: 36px;
}

.knowledge-base-page__title {
  margin-bottom: 20px;
}

.knowledge-base-page__description {
  max-width: 860px;
  margin: 0;
  color: var(--text-muted);
}

.knowledge-base-page__controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.knowledge-base-page__sections {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  width: 100%;
  max-width: 520px;
}

.knowledge-base-page__section-tab,
.knowledge-base-page__topic-tab,
.knowledge-base-page__page-link {
  text-decoration: none;
}

.knowledge-base-page__section-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  min-height: 48px;
  padding: 0 24px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  color: var(--text-strong);
  background: var(--surface-sunken);
  border: 1.5px solid var(--surface-sunken);
  border-radius: var(--radius-md);
  transition: color 140ms ease, background 140ms ease, border-color 140ms ease;
}

.knowledge-base-page__section-tab:hover,
.knowledge-base-page__section-tab:focus-visible {
  color: var(--color-primary);
  background: #fff;
  border-color: var(--color-primary);
}

.knowledge-base-page__section-tab.is-active {
  color: #fff;
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.knowledge-base-page__section-tab.is-active:hover,
.knowledge-base-page__section-tab.is-active:focus-visible {
  color: #fff;
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.knowledge-base-page__topics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.knowledge-base-page__topic-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 18px;
  font-size: var(--text-caption);
  color: var(--text-strong);
  background: #fff;
  border: 1px solid var(--field-border, var(--border-subtle));
  border-radius: var(--radius-md);
  transition: color 140ms ease, border-color 140ms ease;
}

.knowledge-base-page__topic-tab:hover,
.knowledge-base-page__topic-tab:focus-visible,
.knowledge-base-page__topic-tab.is-active {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.knowledge-base-page__grid {
  display: grid;
  grid-template-columns: repeat(var(--kb-columns), minmax(0, 1fr));
  gap: 28px;
}

.knowledge-base-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: #fff;
  transition: box-shadow 160ms ease, transform 160ms ease;
}

.knowledge-base-card:hover,
.knowledge-base-card:focus-visible {
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.knowledge-base-card__image {
  display: block;
  aspect-ratio: 16 / 10;
  background: var(--surface-sunken);
  overflow: hidden;
}

.knowledge-base-card__image img,
.knowledge-base-card__image-placeholder {
  width: 100%;
  height: 100%;
}

.knowledge-base-card__image img {
  display: block;
  object-fit: cover;
}

.knowledge-base-card__image-placeholder {
  display: block;
  background:
    radial-gradient(circle at center, rgba(200, 16, 46, 0.12) 0, rgba(200, 16, 46, 0.08) 22%, transparent 23%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.8));
}

.knowledge-base-card__body {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
}

.knowledge-base-card__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.knowledge-base-card__dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--border-strong, #c9c9c9);
}

.knowledge-base-card__title {
  display: -webkit-box;
  overflow: hidden;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: var(--fw-bold);
  line-height: 1.25;
  letter-spacing: var(--ls-tight);
  color: var(--text-strong);
  text-decoration: none;
  text-wrap: pretty;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  transition: color 140ms ease;
}

.knowledge-base-card:hover .knowledge-base-card__title,
.knowledge-base-card:focus-visible .knowledge-base-card__title {
  color: var(--color-primary);
}

.knowledge-base-card__excerpt {
  display: -webkit-box;
  overflow: hidden;
  margin: 0;
  font-size: 15px;
  color: var(--text-muted);
  text-wrap: pretty;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 5;
  line-clamp: 5;
}

.knowledge-base-card__more {
  margin-top: auto;
  font-size: 14px;
  font-weight: var(--fw-medium);
  color: var(--text-link);
  text-decoration: none;
}

.knowledge-base-page__empty {
  padding: 60px 0 80px;
  text-align: center;
  color: var(--text-muted);
}

.knowledge-base-page__pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.knowledge-base-page__page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  min-height: 40px;
  padding: 0 10px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm, 8px);
  background: #fff;
  color: var(--text-strong);
  font-variant-numeric: tabular-nums;
  transition: color 140ms ease, background 140ms ease, border-color 140ms ease;
}

.knowledge-base-page__page-link:hover,
.knowledge-base-page__page-link:focus-visible {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.knowledge-base-page__page-link.is-active {
  color: #fff;
  background: var(--color-primary);
  border-color: var(--color-primary);
}

@media (max-width: 1023px) {
  .knowledge-base-page__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .knowledge-base-page__sections,
  .knowledge-base-page__grid {
    grid-template-columns: 1fr;
  }

  .knowledge-base-card__body {
    padding: 20px;
  }
}