/* ─── Strefa wiedzy · grid artykułów ─── */

.know-hub {
  padding-top: clamp(40px, 5vw, 64px);
}

.know-hub__toolbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: clamp(28px, 4vw, 40px);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--c-line);
}

.know-hub__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.know-filter {
  font-family: var(--f-mono);
  font-size: var(--fs-mono-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 10px 16px;
  border: 1px solid var(--c-line-strong);
  background: #fff;
  color: var(--c-text-2);
  cursor: pointer;
  transition:
    color 0.32s var(--ease),
    border-color 0.32s var(--ease),
    background 0.32s var(--ease),
    transform 0.32s cubic-bezier(0.34, 1.25, 0.64, 1),
    box-shadow 0.32s var(--ease);
  --corner-cut: 7px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--corner-cut)), calc(100% - var(--corner-cut)) 100%, 0 100%);
}

.know-filter:hover {
  border-color: var(--c-ink);
  color: var(--c-ink);
  transform: translateY(-2px);
}

.know-filter.is-active {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
  box-shadow: 0 10px 28px rgba(235, 35, 71, 0.22);
}

.know-hub__count {
  margin: 0;
  font-family: var(--f-mono);
  font-size: var(--fs-mono-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-3);
  white-space: nowrap;
}

.know-hub__count [data-know-count] {
  color: var(--c-accent-deep);
  font-weight: 500;
  transition: opacity 0.2s var(--ease);
}

.know-hub__count [data-know-count].is-changing {
  opacity: 0.35;
}

.know-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: stretch;
}

.know-grid__card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 100%;
  text-decoration: none;
  color: inherit;
  background: #fff;
  border: 1px solid var(--c-line);
  overflow: hidden;
  --corner-cut: 14px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--corner-cut)), calc(100% - var(--corner-cut)) 100%, 0 100%);
  transition:
    transform 0.35s var(--ease),
    border-color 0.35s var(--ease),
    box-shadow 0.35s var(--ease),
    opacity 0.32s var(--ease);
}

.know-grid__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.38s var(--ease);
  z-index: 2;
}

.know-grid__card.is-know-hidden {
  display: none;
}

.know-grid__card.is-know-entering {
  animation: knowGridIn 0.42s cubic-bezier(0.34, 1.08, 0.64, 1) both;
}

@keyframes knowGridIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.know-grid__card:hover {
  transform: translateY(-4px);
  border-color: rgba(235, 35, 71, 0.28);
  box-shadow: 0 18px 44px rgba(15, 15, 18, 0.08);
}

.know-grid__card:hover::before {
  transform: scaleX(1);
}

.know-grid__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--c-bg-warm);
  border-bottom: 1px solid var(--c-line);
  flex-shrink: 0;
}

.know-grid__media .ampro-photo--fill {
  position: absolute;
  inset: 0;
}

.know-grid__media img,
.know-grid__media .ampro-photo img {
  transition: transform 0.55s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.know-grid__card:hover .know-grid__media img,
.know-grid__card:hover .know-grid__media .ampro-photo img {
  transform: scale(1.04);
}

.know-grid__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 10px;
  padding: clamp(18px, 2.2vw, 24px);
  min-height: 0;
}

.know-grid__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-3);
}

.know-grid__cat {
  color: var(--c-accent-deep);
}

.know-grid__dot {
  width: 3px;
  height: 3px;
  border-radius: 999px;
  background: var(--c-text-3);
  opacity: 0.5;
}

.know-grid__title {
  margin: 0;
  min-height: calc(1.28em * 3);
  font-family: var(--f-sans);
  font-weight: 500;
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.28;
  letter-spacing: -0.014em;
  color: var(--c-ink);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.know-grid__excerpt {
  margin: 0;
  flex: 1;
  min-height: calc(1.55em * 3);
  font-size: var(--fs-body-sm);
  line-height: 1.55;
  color: var(--c-text-2);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.know-grid__cta {
  margin-top: auto;
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 18px;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ink);
  background: #fff;
  border: 1px solid var(--c-line-strong);
  transition:
    color 0.3s var(--ease),
    border-color 0.3s var(--ease),
    background 0.3s var(--ease),
    transform 0.35s var(--ease),
    box-shadow 0.35s var(--ease);
  --corner-cut: 10px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--corner-cut)), calc(100% - var(--corner-cut)) 100%, 0 100%);
}

.know-grid__card:hover .know-grid__cta {
  color: var(--c-accent-deep);
  border-color: rgba(235, 35, 71, 0.35);
  background: rgba(235, 35, 71, 0.04);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(235, 35, 71, 0.1);
}

.know-grid__arrow {
  display: inline-flex;
  color: var(--c-accent);
  transition: transform 0.35s cubic-bezier(0.34, 1.25, 0.64, 1);
}

.know-grid__card:hover .know-grid__arrow {
  transform: translateX(4px);
}

.know-hub__empty {
  margin: 48px 0 0;
  text-align: center;
  font-family: var(--f-mono);
  font-size: var(--fs-body-sm);
  color: var(--c-text-3);
  letter-spacing: 0.04em;
}

@media (max-width: 1024px) {
  .know-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (max-width: 700px) {
  .know-grid {
    grid-template-columns: 1fr;
  }

  .know-hub__toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .know-hub__filters {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
    scrollbar-width: thin;
  }

  .know-filter {
    flex-shrink: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .know-grid__card,
  .know-filter,
  .know-grid__media img,
  .know-grid__arrow,
  .know-grid__card::before {
    transition: none !important;
  }

  .know-grid__card.is-know-entering {
    animation: none !important;
  }
}