:root {
  --bg: #f5f7fa;
  --bg-2: #eef2f6;
  --ink: #12161c;
  --ink-soft: #5a6573;
  --line: #d7dee7;
  --accent: #1f6feb;
  --accent-ink: #1554b8;
  --warn-bg: #fff4e5;
  --warn-ink: #8a4b00;
  --warn-line: #f0d2a8;
  --surface: #ffffff;
  --font: "Source Sans 3", "Segoe UI", sans-serif;
  --mono: "Source Code Pro", ui-monospace, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background:
    linear-gradient(180deg, #ffffff 0%, var(--bg) 42%, var(--bg-2) 100%);
  line-height: 1.55;
  font-size: 1.05rem;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-ink); text-underline-offset: 0.15em; }
a:hover { color: var(--accent); }

.shell {
  width: min(980px, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 1.5rem 0 4rem;
}

.nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1.5rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
  font-size: 1.15rem;
}
.brand img {
  width: 1.35rem;
  height: 1.35rem;
  display: block;
  flex-shrink: 0;
}
.brand span { color: var(--accent); }
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.95rem;
}
.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
}
.nav-links a[aria-current="page"],
.nav-links a:hover {
  color: var(--ink);
}

.hero {
  padding: 0.5rem 0 1.75rem;
  margin-bottom: 0.5rem;
}
.hero-split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1.5rem;
  align-items: center;
}
.hero-brand {
  display: block;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  margin: 0 0 0.7rem;
}
@media (max-width: 760px) {
  .hero-split { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
}

.kicker {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.hero h1 {
  margin: 0;
  font-size: clamp(1.9rem, 4.5vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 700;
  max-width: 22ch;
  text-wrap: balance;
}
.hero h1 .part-code {
  font-size: 0.85em;
}
.lede {
  margin: 0.85rem 0 0;
  max-width: 36rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.25rem;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
  padding: 1.25rem;
  border-radius: 16px;
  background:
    radial-gradient(circle at 30% 20%, #e8f1ff 0%, transparent 55%),
    linear-gradient(160deg, #f8fafc 0%, #e8eef5 100%);
  border: 1px solid var(--line);
}

.swap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
}
.swap-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
  color: inherit;
}
.swap-item img,
.swap img {
  width: 88px;
  height: auto;
  display: block;
  filter: drop-shadow(0 10px 18px rgba(15, 23, 42, 0.18));
  transition: transform 180ms ease;
}
.swap-item:hover img { transform: translateY(-3px); }
.swap-label {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-soft);
}
.swap-arrow {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 1.4rem;
}

.section-head {
  margin: 0.5rem 0 1rem;
}
.section-head h2 {
  margin: 0;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.section-head p {
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
  margin-bottom: 2rem;
}
@media (max-width: 860px) {
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .cat-grid { grid-template-columns: 1fr; }
}

.cat-card {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  text-decoration: none;
  color: inherit;
  padding: 1rem 1rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  min-height: 7.2rem;
  transition: border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}
a.cat-card:hover {
  border-color: #b7c4d4;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
}
.cat-card.is-live {
  border-color: #bfd0ea;
  background: linear-gradient(180deg, #ffffff 0%, #f3f7fd 100%);
}
.cat-card.is-soon {
  opacity: 0.78;
  background: #f8fafc;
}
.cat-card img {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}
.cat-card strong {
  display: block;
  color: var(--ink);
  font-size: 1rem;
  margin-bottom: 0.2rem;
}
.cat-card span {
  display: block;
  color: var(--ink-soft);
  font-size: 0.88rem;
  line-height: 1.35;
}
.featured {
  margin-top: 0.5rem;
  padding-top: 0.25rem;
}

.icon-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
  margin: 0.25rem 0 1.75rem;
}
@media (max-width: 700px) {
  .icon-row { grid-template-columns: 1fr; }
}
/* class display:flex beats UA [hidden] — force hide when filtered */
.icon-card[hidden],
.sku-block[hidden],
.panel[hidden],
.featured[hidden],
section[hidden],
tr[hidden],
.cat-search-empty[hidden] {
  display: none !important;
}

.icon-card {
  display: flex;
  gap: 0.85rem;
  align-items: center;
  text-decoration: none;
  color: inherit;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  transition: border-color 160ms ease, transform 160ms ease;
}
.icon-card:hover {
  border-color: #b7c4d4;
  transform: translateY(-2px);
}
.icon-card img {
  width: 52px;
  height: auto;
  flex-shrink: 0;
}
.icon-card strong {
  display: block;
  color: var(--ink);
  font-size: 0.98rem;
}
.icon-card span {
  display: block;
  color: var(--ink-soft);
  font-size: 0.88rem;
  margin-top: 0.15rem;
}

.cat-search {
  margin: 0 0 1.5rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  display: grid;
  gap: 0.45rem;
}
.cat-search label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.cat-search-row {
  display: flex;
  gap: 0.65rem;
  align-items: center;
}
.cat-search input[type="search"] {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fbfcfe;
  outline: none;
}
.cat-search input[type="search"]:focus {
  border-color: #9db7df;
  box-shadow: 0 0 0 3px rgba(31, 111, 235, 0.12);
}
.cat-search-meta {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin: 0;
}
.cat-search-empty {
  margin: 0 0 1.25rem;
  padding: 0.9rem 1rem;
  border: 1px dashed var(--line);
  border-radius: 10px;
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.55);
}

.guides {
  margin: 0.25rem 0 1.75rem;
}
.guides .section-head,
.sku-index > .section-head {
  margin-bottom: 0.75rem;
}
.guides .section-head h2,
.sku-index > .section-head h2 {
  margin: 0 0 0.25rem;
  font-size: 1.25rem;
}
.guides .section-head p,
.sku-index > .section-head p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* Brand inventories — always Brand (N), with lettermark */
.sku-index {
  margin: 1.75rem 0 0.5rem;
}
.sku-block {
  margin: 0 0 1.65rem;
}
.brand-head {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 1.2rem;
  margin: 0 0 0.65rem;
  font-weight: 700;
  color: var(--ink);
}
.brand-head .brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  flex-shrink: 0;
}
.brand-head .count {
  font-weight: 400;
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.sku-block .icon-row {
  margin-bottom: 0;
}
.icon-card img.brand-mark,
.icon-card > img[src*="/brands/"] {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: cover;
}

.learn-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin: 0.5rem 0 1.25rem;
}
@media (max-width: 700px) {
  .learn-grid { grid-template-columns: repeat(2, 1fr); }
}
.learn-chip {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  padding: 0.9rem 0.75rem;
  text-align: center;
}
.learn-dot {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  margin: 0 auto 0.55rem;
  border: 2px solid rgba(15, 23, 42, 0.2);
  box-shadow: inset 0 -2px 0 rgba(0,0,0,0.12);
}
.learn-dot.green { background: #22c55e; }
.learn-dot.red { background: #f97316; }
.learn-dot.purple { background: #7c3aed; }
.learn-dot.yellow { background: #eab308; }
.learn-chip strong {
  display: block;
  font-size: 0.92rem;
  color: var(--ink);
}
.learn-chip span {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.btn {
  appearance: none;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  padding: 0.65rem 1rem;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
}
.btn:hover { background: #2a3340; color: #fff; border-color: #2a3340; }
.btn-ghost {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover {
  background: var(--bg);
  color: var(--ink);
  border-color: #c4ccd6;
}

.draft-banner {
  margin: 0 0 1.25rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--warn-line);
  background: var(--warn-bg);
  color: var(--warn-ink);
  font-size: 0.92rem;
  border-radius: 8px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.5rem;
}
@media (max-width: 820px) {
  .grid-2 { grid-template-columns: 1fr; }
}

.panel {
  background: transparent;
  border: none;
  border-top: 1px solid var(--line);
  box-shadow: none;
  padding: 1.25rem 0 0.25rem;
}
.panel h2, .panel h3 {
  margin: 0 0 0.65rem;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  font-weight: 700;
}
.panel p, .panel li { color: var(--ink-soft); }
.panel ul { margin: 0.35rem 0 0; padding-left: 1.15rem; }

.stack { display: grid; gap: 1.5rem; margin: 1rem 0; }

.part-code {
  font-family: var(--mono);
  font-size: 0.9em;
  font-weight: 500;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  color: var(--ink);
}

.table-wrap {
  overflow-x: auto;
  margin-top: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
th, td {
  text-align: left;
  padding: 0.8rem 0.9rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
tr:last-child td { border-bottom: none; }
th {
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: #f8fafc;
  font-weight: 600;
}
td { color: var(--ink); }

.crumb {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.crumb a { text-decoration: none; }

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.9rem 0 0;
  font-size: 0.85rem;
  color: var(--ink-soft);
}
.tag {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.2rem 0.55rem;
  background: var(--surface);
  color: var(--ink-soft);
}

.sources-list { padding-left: 1.15rem; }
.sources-list li { margin: 0.4rem 0; }

.swatch {
  display: inline-block;
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
  margin-right: 0.4rem;
  vertical-align: -0.1rem;
  border: 1px solid rgba(15, 23, 42, 0.2);
}
.swatch.green { background: #22c55e; }
.swatch.red { background: #f97316; }
.swatch.purple { background: #7c3aed; }
.swatch.yellow { background: #eab308; }
.swatch.dip { background: #94a3b8; }
.learn-dot.white {
  background: #f8fafc;
  border-color: #94a3b8;
}

.panel ol {
  margin: 0.35rem 0 0;
  padding-left: 1.25rem;
  color: var(--ink-soft);
}
.panel ol li { margin: 0.45rem 0; }

footer {
  margin-top: 2.75rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.9rem;
}
footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 0.55rem;
}
footer a { text-decoration: none; }


/* Home catalog search */
.site-search {
  margin: 0 0 2rem;
}
.site-search .icon-row {
  margin-top: 0.75rem;
}
.nav-links a + a {
  margin-left: 0;
}
footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  margin-bottom: 0.75rem;
}
.cat-grid {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}