/* ═══════════════════════════════════════════════════════════════
   catalog.css — Yueli Gas Spring / Product Listing Page
════════════════════════════════════════════════════════════════ */

/* ── Catalog Header ─────────────────────────────────────────── */
.cat-header {
  background: var(--navy);
  padding: 7rem 2rem 3.5rem;
  margin-top: 0;
}
.cat-header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.cat-header-text .section-tag { color: rgba(247,248,250,.4); }
.cat-header-text h1 {
  font-family: var(--display);
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 400;
  color: var(--cool-white);
  margin: 0.3rem 0 0.75rem;
  line-height: 1.1;
}
.cat-sub { color: rgba(247,248,250,.5); font-size: 0.95rem; line-height: 1.6; }
.cat-header-stats { display: flex; gap: 2.5rem; }
.cat-stat { display: flex; flex-direction: column; align-items: flex-end; }
.cat-stat strong { font-family: var(--display); font-size: 2rem; color: var(--cool-white); }
.cat-stat span   { font-size: 0.75rem; color: rgba(247,248,250,.4); text-transform: uppercase; letter-spacing: .1em; }

/* ── Body Layout ─────────────────────────────────────────────── */
.cat-body {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 0;
  max-width: 1440px;
  margin: 0 auto;
  min-height: 80vh;
}

/* ── Sidebar ──────────────────────────────────────────────────── */
.cat-sidebar {
  background: #f9fafc;
  border-right: 1px solid var(--border);
  padding: 2rem 1.5rem;
  position: sticky;
  top: 72px;
  height: calc(100vh - 72px);
  overflow-y: auto;
}
.filter-group { margin-bottom: 2rem; }
.filter-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: .75rem;
  display: block;
}
.search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.search-wrap input {
  width: 100%;
  padding: .6rem .75rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-family: var(--body);
  font-size: .85rem;
  outline: none;
  background: white;
  color: var(--text);
  transition: border-color var(--fast);
}
.search-wrap input:focus { border-color: var(--navy); }
#clearSearch {
  position: absolute; right: .5rem;
  background: none; border: none; cursor: pointer;
  font-size: .75rem; color: var(--gray); padding: .2rem;
  display: none;
}
.filter-options { display: flex; flex-direction: column; gap: .35rem; }
.filter-chip {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .85rem;
  color: var(--text);
  cursor: pointer;
  padding: .35rem .5rem;
  border-radius: 3px;
  transition: background var(--fast);
  user-select: none;
}
.filter-chip:hover { background: rgba(13,27,42,.06); }
.filter-chip input { accent-color: var(--navy); }
.filter-chip.active { font-weight: 600; color: var(--navy); }
.filter-reset {
  width: 100%;
  padding: .6rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-family: var(--body);
  font-size: .8rem;
  cursor: pointer;
  color: var(--gray);
  transition: all var(--fast);
}
.filter-reset:hover { border-color: var(--red); color: var(--red); }

/* ── Main Area ───────────────────────────────────────────────── */
.cat-main { padding: 1.5rem 2rem; }
.cat-toolbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
}
.cat-result-count { color: var(--gray); font-size: .85rem; flex: 1; }
.cat-result-count strong { color: var(--navy); }
.cat-view-toggle { display: flex; gap: .25rem; }
.view-btn {
  width: 34px; height: 34px;
  background: none; border: 1px solid var(--border);
  border-radius: 3px; cursor: pointer;
  font-size: 1rem; color: var(--gray);
  transition: all var(--fast);
}
.view-btn.active { background: var(--navy); border-color: var(--navy); color: white; }
.cat-sort {
  padding: .5rem .75rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-family: var(--body);
  font-size: .85rem;
  color: var(--text);
  background: white;
  cursor: pointer;
  outline: none;
}
.mobile-filter-btn {
  display: none;
  width: 100%;
  padding: .75rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-family: var(--body);
  font-size: .9rem;
  cursor: pointer;
  margin-bottom: 1rem;
}

/* ── Product Grid ────────────────────────────────────────────── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5px;
  background: var(--border);
}
.product-grid.list-view {
  grid-template-columns: 1fr;
  background: none;
  gap: 0;
}

/* Grid Card */
.pg-card {
  background: var(--cool-white);
  display: flex;
  flex-direction: column;
  transition: background var(--fast), transform var(--fast);
  position: relative;
  text-decoration: none;
  color: inherit;
}
.pg-card:hover { background: white; z-index: 1; }
.pg-img {
  overflow: hidden;
  height: 180px;
  background: white;
  border-bottom: 1px solid var(--border);
}
.pg-img img {
  width: 100%; height: 100%;
  object-fit: contain;
  object-position: center;
  padding: 1rem;
  transition: transform var(--mid);
}
.pg-card:hover .pg-img img { transform: scale(1.04); }
.pg-body { padding: 1.1rem 1rem 1rem; flex: 1; display: flex; flex-direction: column; }
.pg-brand {
  font-size: .65rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--red); margin-bottom: .25rem;
}
.pg-oem {
  font-family: monospace; font-size: .95rem;
  font-weight: 700; color: var(--navy);
  margin-bottom: .35rem;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.pg-fitment {
  font-size: .78rem; color: var(--gray);
  line-height: 1.5; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden;
}
.pg-footer {
  display: flex; align-items: center;
  justify-content: space-between;
  margin-top: 1rem; padding-top: .75rem;
  border-top: 1px solid var(--border);
}
.pg-moq { font-size: .7rem; color: var(--gray); }
.pg-cta {
  font-size: .72rem; font-weight: 700;
  color: var(--red); letter-spacing: .02em;
  transition: letter-spacing var(--fast);
}
.pg-card:hover .pg-cta { letter-spacing: .05em; }
.pg-cat-tag {
  position: absolute; top: .75rem; left: .75rem;
  background: var(--navy); color: white;
  font-size: .6rem; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  padding: .2rem .5rem; border-radius: 2px;
}

/* List View Card */
.product-grid.list-view .pg-card {
  flex-direction: row;
  height: 90px;
  border-bottom: 1px solid var(--border);
  gap: 0;
}
.product-grid.list-view .pg-img {
  width: 80px; height: 90px; flex-shrink: 0;
  border-bottom: none; border-right: 1px solid var(--border);
}
.product-grid.list-view .pg-img img { padding: .5rem; }
.product-grid.list-view .pg-body {
  flex-direction: row; align-items: center;
  padding: 0 1.25rem; gap: 1rem;
}
.product-grid.list-view .pg-oem   { font-size: .95rem; min-width: 160px; }
.product-grid.list-view .pg-fitment { font-size: .82rem; -webkit-line-clamp: 1; }
.product-grid.list-view .pg-footer { margin: 0; padding: 0; border: none; margin-left: auto; }
.product-grid.list-view .pg-cat-tag { display: none; }

/* Empty state */
.empty-state {
  text-align: center; padding: 5rem 2rem;
  color: var(--gray); font-size: 1rem;
}
.empty-state p { margin-bottom: 1.5rem; }

/* Load more */
.load-more-wrap { text-align: center; padding: 2.5rem 0; }

/* ── Product Detail Page ─────────────────────────────────────── */
.breadcrumb-bar {
  background: #f9fafc;
  border-bottom: 1px solid var(--border);
  padding: .75rem 0;
  margin-top: 72px;
}
.breadcrumb-inner {
  max-width: 1280px; margin: 0 auto; padding: 0 2rem;
  display: flex; align-items: center; gap: .5rem;
  font-size: .8rem; color: var(--gray);
}
.breadcrumb-inner a { color: var(--navy); text-decoration: underline; }
.breadcrumb-inner span { color: var(--border); }

.pd-layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2.5rem 2rem 5rem;
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 4rem;
  align-items: start;
}
.pd-left {
  position: sticky;
  top: 100px;
}
.pd-right { min-width: 0; }
.pd-img-wrap {
  background: white;
  border: 1px solid var(--border);
  padding: 2rem;
  margin-bottom: 1.5rem;
}
.pd-img-wrap img {
  width: 100%;
  height: 300px;
  object-fit: contain;
  display: block;
}
.pd-faq { margin-top: 1rem; }

.pd-brand-tag {
  font-size: .7rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--red); margin-bottom: .5rem;
}
.pd-title {
  font-family: var(--display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 400; color: var(--navy);
  line-height: 1.1; margin-bottom: 1rem;
}
.pd-oem { color: var(--gray); font-size: 1.3rem; }
.pd-fitment { font-size: .9rem; color: var(--gray); margin-bottom: .75rem; }
.pd-fitment strong { color: var(--navy); }
.pd-desc { font-size: .9rem; color: var(--gray); line-height: 1.7; margin-bottom: 2rem; }

.pd-section-title {
  font-size: .72rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--navy); border-bottom: 2px solid var(--navy);
  padding-bottom: .4rem; margin: 2rem 0 1rem;
}

.cross-ref-list { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 0; }
.cross-ref-tag {
  background: rgba(13,27,42,.05);
  border: 1px solid var(--border);
  padding: .35rem .75rem;
  font-family: monospace; font-size: .85rem;
  border-radius: 3px;
  color: var(--text);
}

.data-table { width: 100%; border-collapse: collapse; margin: 0 0 2rem; font-size: .88rem; }
.data-table th, .data-table td {
  padding: .7rem .9rem; border: 1px solid var(--border); text-align: left;
}
.data-table th { background: #f9fafc; font-weight: 600; color: var(--navy); width: 38%; }
.data-table thead th { background: var(--navy); color: white; border-color: var(--navy); }
.data-table tbody tr:hover td { background: #fafbfc; }

.pd-form-wrap {
  background: var(--navy); padding: 2rem;
  border-radius: 2px; margin-top: 2rem;
}
.pd-form-wrap h3 {
  font-family: var(--display); font-size: 1.5rem;
  font-weight: 400; color: var(--cool-white); margin-bottom: .35rem;
}
.form-oem-tag { color: var(--red); }
.form-subtitle { font-size: .8rem; color: rgba(247,248,250,.5); margin-bottom: 1.25rem; }
.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin-bottom: .75rem; }
.form-grid-2 input, .pd-form-wrap textarea {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  color: var(--cool-white);
  font-family: var(--body); font-size: .88rem;
  padding: .75rem .9rem; border-radius: 2px; outline: none; width: 100%;
  transition: border-color var(--fast);
}
.form-grid-2 input:focus, .pd-form-wrap textarea:focus { border-color: var(--red); }
.pd-form-wrap textarea { resize: vertical; margin-bottom: .75rem; }
.form-submit { width: 100%; border: none; cursor: pointer; }
.form-status { margin-top: .75rem; font-size: .85rem; display: none; }
.form-status.success { color: #4ade80; display: block; }
.form-status.error   { color: #f87171; display: block; }

/* FAQ on detail page */
.pd-faq h2 {
  font-family: var(--display); font-size: 1.4rem;
  font-weight: 400; color: var(--navy); margin-bottom: 1rem;
}
.faq-item-prod { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid var(--border); }
.faq-item-prod:last-child { border: none; }
.faq-item-prod h4 { font-size: .9rem; color: var(--navy); margin-bottom: .35rem; }
.faq-item-prod p  { font-size: .85rem; color: var(--gray); line-height: 1.7; }

/* Related Products */
.related-section { background: #f9fafc; border-top: 1px solid var(--border); padding: 4rem 0; }
.related-inner   { max-width: 1280px; margin: 0 auto; padding: 0 2rem; }
.related-heading {
  font-family: var(--display); font-size: 1.8rem;
  font-weight: 400; color: var(--navy); margin-bottom: 2rem;
}
.related-heading span { color: var(--red); }
.related-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: var(--border); margin-bottom: 2rem; }
.related-card { background: white; text-decoration: none; color: inherit; display: flex; flex-direction: column; transition: background var(--fast); }
.related-card:hover { background: #fafcff; }
.related-img { height: 140px; overflow: hidden; background: white; border-bottom: 1px solid var(--border); }
.related-img img { width: 100%; height: 100%; object-fit: contain; padding: .75rem; }
.related-body { padding: .9rem 1rem; }
.related-oem  { font-family: monospace; font-size: .9rem; font-weight: 700; color: var(--navy); }
.related-fit  { font-size: .75rem; color: var(--gray); margin-top: .2rem; }
.related-actions { text-align: center; }

/* Prev / Next bar */
.pn-bar { border-top: 1px solid var(--border); background: white; }
.pn-inner {
  max-width: 1280px; margin: 0 auto; padding: 1.25rem 2rem;
  display: flex; align-items: center; justify-content: space-between;
}
.pn-link {
  font-size: .82rem; font-weight: 600; color: var(--navy);
  text-decoration: none; transition: color var(--fast);
  font-family: monospace;
}
.pn-link:hover { color: var(--red); }
.pn-catalog { font-size: .78rem; color: var(--gray); text-decoration: underline; }

/* ── Site Footer ─────────────────────────────────────────────── */
.site-footer {
  background: var(--navy);
  color: rgba(247,248,250,.6);
  font-size: .85rem;
}
.footer-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 4rem 2rem 2rem;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
}
.footer-brand .logo { color: var(--cool-white); margin-bottom: .75rem; }
.footer-brand p     { line-height: 1.7; }
.footer-links h4, .footer-contact h4 {
  color: var(--cool-white); font-size: .7rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer-links { display: flex; flex-direction: column; gap: .5rem; }
.footer-links a  { color: rgba(247,248,250,.5); transition: color var(--fast); }
.footer-links a:hover { color: var(--cool-white); }
.footer-contact a { color: rgba(247,248,250,.5); }
.footer-contact p { line-height: 2; }
.footer-bottom {
  max-width: 1280px; margin: 0 auto;
  padding: 1.25rem 2rem;
  border-top: 1px solid rgba(255,255,255,.07);
  font-size: .75rem; color: rgba(247,248,250,.25);
}

/* Nav always-opaque on interior pages (catalog + product detail) */
.nav-always-opaque #nav,
#nav.scrolled { background: rgba(13,27,42,0.97) !important; backdrop-filter: blur(14px); box-shadow: 0 1px 0 rgba(255,255,255,0.07); }

/* Nav logo text for simplified logo (no logo-mark) */
.logo > span { color: var(--red); font-family: var(--display); font-size: 0.5em; vertical-align: super; }

/* Nav active */
.nav-active { color: var(--cool-white) !important; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .cat-body { grid-template-columns: 220px 1fr; }
  .pd-layout { grid-template-columns: 360px 1fr; gap: 2.5rem; }
  .related-grid { grid-template-columns: repeat(2,1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 768px) {
  .cat-body { grid-template-columns: 1fr; }
  .cat-sidebar {
    position: fixed; top: 0; left: -280px; width: 280px;
    height: 100vh; z-index: 200; transition: left .3s ease;
    box-shadow: 4px 0 20px rgba(13,27,42,.15);
    padding-top: 4rem;
  }
  .cat-sidebar.open { left: 0; }
  .mobile-filter-btn { display: block; }
  .pd-layout { grid-template-columns: 1fr; gap: 2rem; }
  .pd-left { position: static; }
  .form-grid-2 { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: repeat(2,1fr); }
  .cat-header-inner { flex-direction: column; align-items: flex-start; }
  .cat-header-stats { gap: 1.5rem; }
  .footer-inner { grid-template-columns: 1fr; gap: 1.5rem; }
  .pn-inner { flex-direction: column; gap: .75rem; text-align: center; }
}

@media (max-width: 480px) {
  .product-grid { grid-template-columns: 1fr 1fr; }
  .related-grid { grid-template-columns: 1fr 1fr; }
}