/* ==========================================================================
   ROG BIKES — COLLECTION STYLESHEET (rb-coll)
   Brand: Rog Bikes · Design System: Bright Technical · REM-first
   ========================================================================== */

/* --- Collection Page Host --- */
.rb-coll-page {
  display: block;
  width: 100%;
  background-color: var(--rb-color-bg, #ffffff);
  color: var(--rb-color-ink, #111418);
}

/* --- Hero Banner --- */
.rb-coll-hero {
  width: 100%;
  background-color: var(--rb-color-surface, #f2f3f5);
  border-bottom: 0.0625rem solid var(--rb-color-line, #d9dce1);
  padding: 2.5rem 0;
}

.rb-coll-hero__inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 64rem) {
  .rb-coll-hero__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 3rem;
  }
}

.rb-coll-hero__content {
  flex: 1;
  max-width: 48rem;
}

.rb-coll-hero__eyebrow-wrap {
  margin-bottom: 0.5rem;
}

.rb-coll-hero__eyebrow {
  display: inline-block;
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--rb-color-accent-ink, #b80500);
}

.rb-coll-hero__title {
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  line-height: var(--rb-lh-tight, 1.18);
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--rb-color-ink, #111418);
  margin: 0 0 0.75rem 0;
}

.rb-coll-hero__desc {
  font-family: var(--rb-font-body, 'Be Vietnam Pro', sans-serif);
  font-size: 0.9375rem;
  line-height: var(--rb-lh-base, 1.65);
  color: var(--rb-color-ink-2, #4a5160);
  margin: 0 0 1rem 0;
}

.rb-coll-hero__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.rb-coll-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.625rem;
  background-color: var(--rb-color-bg, #ffffff);
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: var(--rb-radius, 0.25rem);
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--rb-color-ink, #111418);
}

.rb-coll-hero__badge-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background-color: var(--rb-color-accent, #e10600);
}

.rb-coll-hero__media {
  flex-shrink: 0;
  width: 100%;
  max-width: 28rem;
  border-radius: var(--rb-radius, 0.25rem);
  overflow: hidden;
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  background-color: var(--rb-color-surface-2, #e8eaee);
}

.rb-coll-hero__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* --- Quick Category Navigation Tabs --- */
.rb-coll-nav {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 0.0625rem solid var(--rb-color-line, #d9dce1);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.rb-coll-nav__list {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
  white-space: nowrap;
}

.rb-coll-nav__link {
  display: inline-block;
  padding: 0.625rem 0.875rem;
  border-radius: var(--rb-radius, 0.25rem);
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--rb-color-ink-2, #4a5160);
  background-color: var(--rb-color-bg, #ffffff);
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  text-decoration: none;
  transition: color var(--rb-dur-fast, 150ms) var(--rb-ease), border-color var(--rb-dur-fast, 150ms) var(--rb-ease), background-color var(--rb-dur-fast, 150ms) var(--rb-ease);
}

@media (hover: hover) {
  .rb-coll-nav__link:hover {
    color: var(--rb-color-accent, #e10600);
    border-color: var(--rb-color-accent, #e10600);
  }
}

.rb-coll-nav__link.is-active {
  color: var(--rb-color-on-accent, #ffffff);
  background-color: var(--rb-color-ink, #111418);
  border-color: var(--rb-color-ink, #111418);
}

/* --- Catalog Section --- */
.rb-coll-catalog {
  padding: 2rem 0 4rem 0;
}

/* --- Toolbar --- */
.rb-coll-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 1rem;
  margin-bottom: 2rem;
  background-color: var(--rb-color-surface, #f2f3f5);
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: var(--rb-radius, 0.25rem);
}

.rb-coll-toolbar__left {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.rb-coll-toolbar__filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  height: 2.5rem;
  padding: 0 1rem;
  background-color: var(--rb-color-bg, #ffffff);
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: var(--rb-radius, 0.25rem);
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--rb-color-ink, #111418);
  cursor: pointer;
  transition: border-color var(--rb-dur-fast) var(--rb-ease), color var(--rb-dur-fast) var(--rb-ease);
}

@media (min-width: 64rem) {
  .rb-coll-toolbar__filter-btn {
    display: none;
  }
}

@media (hover: hover) {
  .rb-coll-toolbar__filter-btn:hover {
    border-color: var(--rb-color-ink, #111418);
  }
}

.rb-coll-toolbar__filter-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 0.25rem;
  background-color: var(--rb-color-accent, #e10600);
  color: var(--rb-color-on-accent, #ffffff);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
}

.rb-coll-toolbar__summary {
  font-family: var(--rb-font-body, 'Be Vietnam Pro', sans-serif);
  font-size: 0.875rem;
  color: var(--rb-color-ink-2, #4a5160);
}

.rb-coll-toolbar__chips {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  width: 100%;
  padding-top: 0.5rem;
  border-top: 0.0625rem solid var(--rb-color-line, #d9dce1);
}

.rb-coll-toolbar__chips[hidden],
.rb-coll-toolbar__filter-badge[hidden] {
  display: none;
}

.rb-coll-chips-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.rb-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.5rem;
  background-color: var(--rb-color-bg, #ffffff);
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: var(--rb-radius, 0.25rem);
  font-family: var(--rb-font-body, 'Be Vietnam Pro', sans-serif);
  font-size: 0.8125rem;
  color: var(--rb-color-ink, #111418);
}

.rb-chip__remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--rb-color-muted, #6b7280);
  transition: color var(--rb-dur-fast) var(--rb-ease);
}

@media (hover: hover) {
  .rb-chip__remove:hover {
    color: var(--rb-color-accent, #e10600);
  }
}

.rb-coll-chips-clear {
  background: none;
  border: none;
  padding: 0.25rem 0.5rem;
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--rb-color-accent, #e10600);
  cursor: pointer;
  text-decoration: underline;
}

.rb-coll-toolbar__right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Density Switcher */
.rb-density-switcher {
  display: none;
  align-items: center;
  background-color: var(--rb-color-bg, #ffffff);
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: var(--rb-radius, 0.25rem);
  overflow: hidden;
}

@media (min-width: 48rem) {
  .rb-density-switcher {
    display: inline-flex;
  }
}

.rb-density-switcher__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  background: none;
  border: none;
  color: var(--rb-color-muted, #6b7280);
  cursor: pointer;
  transition: background-color var(--rb-dur-fast) var(--rb-ease), color var(--rb-dur-fast) var(--rb-ease);
}

@media (hover: hover) {
  .rb-density-switcher__btn:hover {
    color: var(--rb-color-ink, #111418);
    background-color: var(--rb-color-surface, #f2f3f5);
  }
}

.rb-density-switcher__btn.is-active {
  background-color: var(--rb-color-ink, #111418);
  color: var(--rb-color-on-accent, #ffffff);
}

/* Sort Select */
.rb-sort-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.rb-sort-label {
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--rb-color-ink-2, #4a5160);
  white-space: nowrap;
}

.rb-sort-select {
  height: 2.75rem;
  padding: 0 2rem 0 0.75rem;
  background-color: var(--rb-color-bg, #ffffff);
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: var(--rb-radius, 0.25rem);
  font-family: var(--rb-font-body, 'Be Vietnam Pro', sans-serif);
  font-size: 0.875rem;
  color: var(--rb-color-ink, #111418);
  cursor: pointer;
  outline: none;
  transition: border-color var(--rb-dur-fast) var(--rb-ease);
}

.rb-sort-select:focus {
  border-color: var(--rb-color-ink, #111418);
}

/* --- Layout Grid --- */
.rb-coll-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 64rem) {
  .rb-coll-layout {
    grid-template-columns: 18rem 1fr;
    gap: 2rem;
    align-items: start;
  }
}

/* --- Filter Sidebar / Drawer --- */
.rb-filter-drawer {
  background-color: var(--rb-color-bg, #ffffff);
}

@media (max-width: 63.9375rem) {
  .rb-filter-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: 20rem;
    max-width: calc(100vw - 3rem);
    height: 100vh;
    z-index: 2001;
    overflow-y: auto;
    padding: 1.5rem;
    box-shadow: var(--rb-shadow-2, 0 0.5rem 1.5rem rgba(17, 20, 24, 0.1));
    transform: translateX(-100%);
    visibility: hidden;
    pointer-events: none;
    transition: transform var(--rb-dur, 240ms) var(--rb-ease), visibility var(--rb-dur, 240ms);
  }

  .rb-filter-drawer.is-open {
    transform: translateX(0);
    visibility: visible;
    pointer-events: auto;
  }
}

@media (min-width: 64rem) {
  .rb-filter-drawer {
    position: static;
    border: 0.0625rem solid var(--rb-color-line, #d9dce1);
    border-radius: var(--rb-radius, 0.25rem);
    padding: 1.5rem;
  }
}

.rb-filter-drawer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 0.0625rem solid var(--rb-color-line, #d9dce1);
}

.rb-filter-drawer__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  background: none;
  border: none;
  color: var(--rb-color-ink, #111418);
  cursor: pointer;
}

@media (min-width: 64rem) {
  .rb-filter-drawer__close {
    display: none;
  }
}

.rb-filter-drawer__eyebrow {
  display: block;
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--rb-color-accent-ink, #b80500);
}

.rb-filter-drawer__heading {
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--rb-color-ink, #111418);
  margin: 0;
}

.rb-filter-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(17, 20, 24, 0.4);
  z-index: 2000;
  border: none;
  padding: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--rb-dur, 240ms) var(--rb-ease), visibility var(--rb-dur, 240ms);
}

.rb-filter-overlay.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* --- Facet Groups --- */
.rb-facet-group {
  display: block;
  padding: 1.25rem 0;
  border-top: 0.0625rem solid var(--rb-color-line, #d9dce1);
}

.rb-facets__form > .rb-facet-group:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.rb-facet-group__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.875rem;
}

.rb-facet-group__index {
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--rb-color-muted, #6b7280);
}

.rb-facet-group__title {
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--rb-color-ink, #111418);
  margin: 0;
}

.rb-facet-options {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  max-height: 18rem;
  overflow-y: auto;
  padding-right: 0.25rem;
}

.rb-facet-options::-webkit-scrollbar {
  width: 0.375rem;
}

.rb-facet-options::-webkit-scrollbar-button {
  display: none;
}

.rb-facet-options::-webkit-scrollbar-track {
  background: transparent;
}

.rb-facet-options::-webkit-scrollbar-thumb {
  background-color: var(--rb-color-line, #d9dce1);
  border-radius: 0.1875rem;
}

@supports not selector(::-webkit-scrollbar) {
  .rb-facet-options {
    scrollbar-width: thin;
    scrollbar-color: var(--rb-color-line, #d9dce1) transparent;
  }
}

.rb-facet-item {
  display: block;
}

.rb-facet-label {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  cursor: pointer;
  user-select: none;
  font-family: var(--rb-font-body, 'Be Vietnam Pro', sans-serif);
  font-size: 0.875rem;
  color: var(--rb-color-ink-2, #4a5160);
  min-height: 2rem;
  transition: color var(--rb-dur-fast) var(--rb-ease);
}

@media (hover: hover) {
  .rb-facet-label:hover {
    color: var(--rb-color-ink, #111418);
  }
}

.rb-facet-checkbox,
.rb-facet-radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.rb-facet-custom-check {
  display: inline-block;
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: var(--rb-radius, 0.25rem);
  background-color: var(--rb-color-bg, #ffffff);
  transition: background-color var(--rb-dur-fast) var(--rb-ease), border-color var(--rb-dur-fast) var(--rb-ease);
  position: relative;
}

.rb-facet-checkbox:checked + .rb-facet-custom-check {
  background-color: var(--rb-color-accent, #e10600);
  border-color: var(--rb-color-accent, #e10600);
}

.rb-facet-checkbox:checked + .rb-facet-custom-check::after {
  content: '';
  position: absolute;
  top: 0.2rem;
  left: 0.35rem;
  width: 0.35rem;
  height: 0.6rem;
  border: solid var(--rb-color-on-accent, #ffffff);
  border-width: 0 0.125rem 0.125rem 0;
  transform: rotate(45deg);
}

.rb-facet-custom-radio {
  display: inline-block;
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: 50%;
  background-color: var(--rb-color-bg, #ffffff);
  transition: border-color var(--rb-dur-fast) var(--rb-ease);
  position: relative;
}

.rb-facet-radio:checked + .rb-facet-custom-radio {
  border-color: var(--rb-color-accent, #e10600);
}

.rb-facet-radio:checked + .rb-facet-custom-radio::after {
  content: '';
  position: absolute;
  top: 0.25rem;
  left: 0.25rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background-color: var(--rb-color-accent, #e10600);
}

/* --- Advisor Block --- */
.rb-coll-advisor {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background-color: var(--rb-color-surface, #f2f3f5);
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: var(--rb-radius, 0.25rem);
}

.rb-coll-advisor__eyebrow {
  display: block;
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--rb-color-accent-ink, #b80500);
  margin-bottom: 0.25rem;
}

.rb-coll-advisor__title {
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--rb-color-ink, #111418);
  margin: 0 0 0.5rem 0;
}

.rb-coll-advisor__text {
  font-family: var(--rb-font-body, 'Be Vietnam Pro', sans-serif);
  font-size: 0.8125rem;
  line-height: var(--rb-lh-base, 1.65);
  color: var(--rb-color-ink-2, #4a5160);
  margin: 0 0 1rem 0;
}

.rb-coll-advisor__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  height: 2.5rem;
  padding: 0 1rem;
  background-color: var(--rb-color-bg, #ffffff);
  border: 0.0625rem solid var(--rb-color-ink, #111418);
  border-radius: var(--rb-radius, 0.25rem);
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--rb-color-ink, #111418);
  text-decoration: none;
  transition: background-color var(--rb-dur-fast) var(--rb-ease), color var(--rb-dur-fast) var(--rb-ease);
}

@media (hover: hover) {
  .rb-coll-advisor__btn:hover {
    background-color: var(--rb-color-ink, #111418);
    color: var(--rb-color-on-accent, #ffffff);
  }
}

/* --- Products Grid & Densities --- */
.rb-coll-content {
  width: 100%;
}

.rb-product-grid.rb-coll-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

@media (min-width: 48rem) {
  .rb-product-grid.rb-coll-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
  }
}

@media (min-width: 75rem) {
  .rb-product-grid.rb-coll-grid.rb-grid--4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
  }
  .rb-product-grid.rb-coll-grid.rb-grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }
  .rb-product-grid.rb-coll-grid.rb-grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

/* --- Pagination --- */
.rb-coll-pagination {
  margin-top: 3rem;
  display: flex;
  justify-content: center;
}

.section-pagination {
  display: block;
}

.section-pagination__list {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.section-pagination__item {
  display: inline-block;
}

.section-pagination__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 0.5rem;
  background-color: var(--rb-color-bg, #ffffff);
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: var(--rb-radius, 0.25rem);
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--rb-color-ink, #111418);
  text-decoration: none;
  transition: background-color var(--rb-dur-fast) var(--rb-ease), border-color var(--rb-dur-fast) var(--rb-ease), color var(--rb-dur-fast) var(--rb-ease);
}

@media (hover: hover) {
  .section-pagination__link:hover {
    border-color: var(--rb-color-ink, #111418);
  }
}

.section-pagination__link--current {
  background-color: var(--rb-color-ink, #111418);
  border-color: var(--rb-color-ink, #111418);
  color: var(--rb-color-on-accent, #ffffff);
}

.section-pagination__link--ellipsis {
  border: none;
  background: none;
  color: var(--rb-color-muted, #6b7280);
}

/* --- Empty State --- */
.rb-empty-state {
  text-align: center;
  padding: 4rem 1.5rem;
  max-width: 32rem;
  margin: 0 auto;
}

.rb-empty-state__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1.5rem auto;
  border-radius: 50%;
  background-color: var(--rb-color-surface, #f2f3f5);
  color: var(--rb-color-muted, #6b7280);
}

.rb-empty-state__title {
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--rb-color-ink, #111418);
  margin: 0 0 0.5rem 0;
}

.rb-empty-state__desc {
  font-family: var(--rb-font-body, 'Be Vietnam Pro', sans-serif);
  font-size: 0.9375rem;
  line-height: var(--rb-lh-base, 1.65);
  color: var(--rb-color-ink-2, #4a5160);
  margin: 0 0 1.5rem 0;
}

.rb-empty-state__actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* --- Loading & Error Feedback --- */
.rb-filter-loading {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  background-color: var(--rb-color-ink, #111418);
  color: var(--rb-color-on-accent, #ffffff);
  border-radius: var(--rb-radius, 0.25rem);
  box-shadow: var(--rb-shadow-2, 0 0.5rem 1.5rem rgba(17, 20, 24, 0.1));
  z-index: 101;
  font-family: var(--rb-font-body, 'Be Vietnam Pro', sans-serif);
  font-size: 0.875rem;
}

.rb-filter-loading__spinner {
  width: 1rem;
  height: 1rem;
  border: 0.125rem solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--rb-color-on-accent, #ffffff);
  border-radius: 50%;
  animation: rb-spin 600ms linear infinite;
}

@keyframes rb-spin {
  to {
    transform: rotate(360deg);
  }
}

.rb-filter-error {
  padding: 1rem;
  margin-bottom: 1.5rem;
  background-color: #ffdad6;
  color: #93000a;
  border: 0.0625rem solid #ba1a1a;
  border-radius: var(--rb-radius, 0.25rem);
  font-family: var(--rb-font-body, 'Be Vietnam Pro', sans-serif);
  font-size: 0.875rem;
}

/* --- Rich Description at Bottom --- */
.rb-coll-rich-desc {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 0.0625rem solid var(--rb-color-line, #d9dce1);
}

.rb-coll-rich-desc__content {
  font-family: var(--rb-font-body, 'Be Vietnam Pro', sans-serif);
  font-size: 0.9375rem;
  line-height: var(--rb-lh-base, 1.65);
  color: var(--rb-color-ink-2, #4a5160);
}

/* --- Category List (list-collections.liquid) --- */
.rb-category-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 48rem) {
  .rb-category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 64rem) {
  .rb-category-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.rb-category-card {
  display: flex;
  flex-direction: column;
  background-color: var(--rb-color-bg, #ffffff);
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: var(--rb-radius, 0.25rem);
  overflow: hidden;
  transition: transform var(--rb-dur, 240ms) var(--rb-ease), box-shadow var(--rb-dur, 240ms) var(--rb-ease), border-color var(--rb-dur, 240ms) var(--rb-ease);
}

@media (hover: hover) {
  .rb-category-card:hover {
    transform: translateY(-0.25rem);
    box-shadow: var(--rb-shadow-2, 0 0.5rem 1.5rem rgba(17, 20, 24, 0.1));
    border-color: var(--rb-color-ink, #111418);
  }
}

.rb-category-card__media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  background-color: var(--rb-color-surface, #f2f3f5);
  overflow: hidden;
  text-decoration: none;
}

.rb-category-card__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--rb-dur-slow, 420ms) var(--rb-ease);
}

@media (hover: hover) {
  .rb-category-card:hover .rb-category-card__img {
    transform: scale(1.04);
  }
}

.rb-category-card__placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: var(--rb-color-muted, #6b7280);
}

.rb-category-card__index {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.5rem;
  background-color: var(--rb-color-bg, #ffffff);
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: var(--rb-radius, 0.25rem);
  color: var(--rb-color-ink, #111418);
}

.rb-category-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.25rem;
}

.rb-category-card__badge {
  display: inline-block;
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--rb-color-accent-ink, #b80500);
  margin-bottom: 0.375rem;
}

.rb-category-card__title {
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  line-height: var(--rb-lh-tight, 1.18);
  margin: 0 0 0.5rem 0;
}

.rb-category-card__title a {
  color: var(--rb-color-ink, #111418);
  text-decoration: none;
  transition: color var(--rb-dur-fast) var(--rb-ease);
}

@media (hover: hover) {
  .rb-category-card__title a:hover {
    color: var(--rb-color-accent, #e10600);
  }
}

.rb-category-card__desc {
  font-family: var(--rb-font-body, 'Be Vietnam Pro', sans-serif);
  font-size: 0.875rem;
  line-height: var(--rb-lh-base, 1.65);
  color: var(--rb-color-ink-2, #4a5160);
  margin: 0 0 1rem 0;
  flex: 1;
}

.rb-category-card__action {
  margin-top: auto;
}

.rb-category-card__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  height: 2.5rem;
  padding: 0 1rem;
  font-family: var(--rb-font-display, 'Oswald', sans-serif);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--rb-color-ink, #111418);
  border: 0.0625rem solid var(--rb-color-line, #d9dce1);
  border-radius: var(--rb-radius, 0.25rem);
  transition: background-color var(--rb-dur-fast) var(--rb-ease), border-color var(--rb-dur-fast) var(--rb-ease), color var(--rb-dur-fast) var(--rb-ease);
}

@media (hover: hover) {
  .rb-category-card__btn:hover {
    border-color: var(--rb-color-ink, #111418);
    background-color: var(--rb-color-ink, #111418);
    color: var(--rb-color-on-accent, #ffffff);
  }
}

/* Interactive control hover states */
.rb-coll-chips-clear {
  transition: color var(--rb-dur-fast, 150ms) var(--rb-ease, ease);
}

.rb-filter-drawer__close {
  transition: background-color var(--rb-dur-fast, 150ms) var(--rb-ease, ease),
              color var(--rb-dur-fast, 150ms) var(--rb-ease, ease);
}

@media (hover: hover) {
  .rb-coll-chips-clear:hover {
    color: var(--rb-color-accent-ink, #b80500);
  }

  .rb-filter-drawer__close:hover {
    background-color: var(--rb-color-surface, #f2f3f5);
    color: var(--rb-color-accent, #e10600);
  }

  .rb-sort-select:hover:not(:focus) {
    border-color: var(--rb-color-ink-2, #4a5160);
  }
}