.catalog-nav {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  margin: 0 0 1.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid #e4e4e4;
  background: #fff;
}
.catalog-nav__group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.catalog-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  border: 1px solid #e4e4e4;
  border-radius: 999px;
  background: #fff;
  color: #58595b;
  font-size: 0.875rem;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background-color 0.15s ease;
}
.catalog-chip:hover, .catalog-chip:focus-visible {
  border-color: #da1e1e;
  color: #da1e1e;
  text-decoration: none;
}
.catalog-chip:focus-visible {
  outline: 2px solid #da1e1e;
  outline-offset: 2px;
}
.catalog-chip.is-active {
  border-color: #da1e1e;
  background: #da1e1e;
  color: #fff;
}
.catalog-chip[hidden] {
  display: none;
}
.catalog-chip__count {
  font-size: 0.75rem;
  opacity: 0.7;
}

.catalog-group {
  margin-bottom: 2.5rem;
  scroll-margin-top: 5rem;
}
.catalog-group[hidden] {
  display: none;
}
.catalog-group__title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1.1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #da1e1e;
  color: #da1e1e;
  font-size: 1.375rem;
}
.catalog-group__count {
  display: inline-flex;
  justify-content: center;
  min-width: 1.6rem;
  padding: 0 0.45rem;
  border-radius: 999px;
  background: #f3f3f3;
  color: #58595b;
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.6;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1.25rem 1rem;
}
.catalog-grid__item[hidden] {
  display: none;
}

.catalog-card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  border: 1px solid #e4e4e4;
  border-radius: 6px;
  background: #fff;
  color: inherit;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.catalog-card::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  background: #da1e1e;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}
.catalog-card:hover, .catalog-card:focus-visible {
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
  color: inherit;
  text-decoration: none;
  transform: translateY(-3px);
}
.catalog-card:hover::after, .catalog-card:focus-visible::after {
  transform: scaleX(1);
}
.catalog-card:focus-visible {
  outline: 2px solid #da1e1e;
  outline-offset: 2px;
}
.catalog-card__cover {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 3/4;
  padding: 0.75rem;
  background: #f3f3f3;
}
.catalog-card__cover .pdfpreview,
.catalog-card__cover .pdfpreview-image-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  margin: 0;
  box-shadow: none;
}
.catalog-card__cover img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.18);
}
.catalog-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.75rem 0.85rem 1rem;
}
.catalog-card__title {
  display: -webkit-box;
  overflow: hidden;
  color: #212529;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.3;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}
.catalog-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.5rem;
  margin-top: auto;
  color: #58595b;
  font-size: 0.75rem;
}
.catalog-card__type {
  padding: 0 0.35rem;
  border-radius: 3px;
  background: #da1e1e;
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.catalog-card__lang {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-weight: 600;
}
.catalog-card__lang::before {
  content: "";
  width: 18px;
  height: 12px;
  background-position: center;
  background-size: cover;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.1);
}
.catalog-card__lang--hu::before {
  background-image: url("../img/flag_hu.jpg");
}
.catalog-card__lang--de::before {
  background-image: url("../img/flag_de.jpg");
}
.catalog-card__lang--en::before {
  background-image: url("../img/flag_en.png");
}
.catalog-card__download {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
  color: #da1e1e;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.catalog-card__download svg {
  width: 1rem;
  height: 1rem;
}
.catalog-card:hover .catalog-card__download, .catalog-card:focus-visible .catalog-card__download {
  opacity: 1;
  transform: none;
}

@media (hover: none) {
  .catalog-card__download {
    opacity: 1;
    transform: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .catalog-card,
  .catalog-card::after,
  .catalog-card__download,
  .catalog-chip {
    transition: none;
  }
  .catalog-card:hover,
  .catalog-card:focus-visible {
    transform: none;
  }
}