:root {
  color-scheme: light;
  --ink: #0c1220;
  --muted: #5d6575;
  --quiet: #7a8290;
  --paper: #ffffff;
  --wash: #f5f6f9;
  --wash-strong: #eceff5;
  --line: #d9deea;
  --accent: #0017c1;
  --accent-hover: #00109a;
  --accent-soft: #e8ebff;
  --danger: #b42318;
  --radius: 18px;
  --max: 1180px;
  --shadow: 0 24px 70px rgb(16 24 40 / 0.08);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: linear-gradient(180deg, #fff 0%, #f7f8fb 100%);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgb(0 23 193 / 0.055) 1px, transparent 1px),
    linear-gradient(180deg, rgb(12 18 32 / 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 65%);
}

button,
input {
  font: inherit;
}

button,
a,
summary,
input {
  outline-offset: 4px;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  transform: translateY(-160%);
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  padding: 10px 14px;
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header,
.section-shell {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  backdrop-filter: blur(16px);
}

.brand,
.nav a,
.site-footer a {
  color: var(--ink);
  text-decoration: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-height: 44px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 3vw, 28px);
  font-size: 0.93rem;
}

.nav a,
.site-footer a,
.text-link {
  border-bottom: 1px solid transparent;
}

.nav a:hover,
.site-footer a:hover,
.text-link:hover {
  border-color: currentColor;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2 {
  margin: 0;
  letter-spacing: -0.055em;
  line-height: 0.96;
}

h1 {
  max-width: 940px;
  font-size: clamp(3.2rem, 8vw, 6.6rem);
  font-weight: 760;
}

h2 {
  font-size: clamp(2rem, 5vw, 4.1rem);
  font-weight: 740;
}

.lead {
  max-width: 760px;
  margin: 28px 0 0;
  color: #273044;
  font-size: clamp(1.16rem, 2vw, 1.5rem);
  line-height: 1.35;
}

.catalog-hero {
  padding: clamp(48px, 8vw, 92px) 0 clamp(38px, 6vw, 76px);
}

.hero-note {
  display: grid;
  gap: 8px;
  max-width: 920px;
  margin-top: 30px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  padding: 18px 20px;
}

.hero-note p,
.qualification-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.catalog-shell,
.qualification {
  padding: clamp(44px, 8vw, 86px) 0;
  border-top: 1px solid var(--line);
}

.catalog-intro-panel {
  max-width: 900px;
  margin-bottom: 28px;
}

.catalog-shell {
  padding-top: 28px;
  border-top: 0;
}

#catalog-title {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
}

.catalog-intro-panel p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.08rem;
}

.catalog-layout {
  display: grid;
  grid-template-columns: minmax(230px, 300px) minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: start;
}

.catalog-sidebar {
  position: sticky;
  top: 90px;
  display: grid;
  gap: 14px;
}

.catalog-menu,
.results-toolbar,
.empty-state,
.product-card details,
.qualification-grid {
  border: 1px solid var(--line);
  background: rgb(255 255 255 / 0.9);
  box-shadow: var(--shadow);
}

.catalog-menu {
  display: grid;
  gap: 10px;
  border-radius: var(--radius);
  padding: 14px;
}

.menu-group {
  display: grid;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.menu-group h2 {
  margin: 0;
  color: var(--quiet);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  line-height: 1.2;
  text-transform: uppercase;
}

.menu-group ul {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.category-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 14px;
  padding: 10px 12px;
  color: var(--ink);
  text-decoration: none;
}

.category-link span {
  min-width: 0;
}

.category-link strong {
  display: grid;
  place-items: center;
  min-width: 28px;
  min-height: 28px;
  border-radius: 999px;
  background: var(--wash-strong);
  color: var(--muted);
  font-size: 0.78rem;
}

.category-link:hover,
.category-link.is-current {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.category-link.is-current strong {
  background: var(--accent);
  color: #fff;
}

.filter-reset {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font-weight: 700;
  cursor: pointer;
}

.filter-reset:hover {
  border-color: var(--accent);
}

.catalog-results {
  display: grid;
  gap: 24px;
  min-width: 0;
}

.results-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: end;
  border-radius: var(--radius);
  padding: 18px;
}

.search-control {
  display: grid;
  gap: 8px;
  color: #222a3a;
  font-size: 0.9rem;
  font-weight: 750;
}

.search-control input {
  width: 100%;
  border: 1px solid #c9cfdd;
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  padding: 12px 13px;
  font-weight: 450;
}

.search-control input:focus {
  border-color: var(--accent);
}

.catalog-count {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.92rem;
  white-space: nowrap;
}

.empty-state {
  border-radius: var(--radius);
  padding: 26px;
}

.empty-state h2 {
  font-size: 1.45rem;
  letter-spacing: -0.03em;
}

.empty-state p {
  color: var(--muted);
}

.category-section {
  display: grid;
  gap: 16px;
  scroll-margin-top: 108px;
}

.category-heading {
  display: grid;
  gap: 10px;
}

.category-heading h2 {
  font-size: clamp(1.8rem, 3vw, 2.65rem);
}

.category-heading p:not(.eyebrow) {
  max-width: 780px;
  margin: 0;
  color: var(--muted);
}

.product-stack {
  display: grid;
  gap: 12px;
}

.product-card details {
  border-radius: 16px;
  overflow: hidden;
  scroll-margin-top: 108px;
}

.product-card details.is-targeted {
  box-shadow: 0 0 0 3px rgb(0 23 193 / 0.22), var(--shadow);
}

summary {
  display: grid;
  gap: 8px;
  min-height: 74px;
  padding: 20px 24px;
  cursor: pointer;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  grid-row: 1;
  justify-self: end;
  color: var(--accent);
  font-size: 1.3rem;
  font-weight: 700;
}

details[open] summary::after {
  content: "–";
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding-right: 38px;
}

.product-code,
.kind-badge,
.status-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.product-code {
  background: var(--accent);
  color: #fff;
}

.kind-badge {
  border: 1px solid var(--line);
  background: var(--wash);
  color: var(--muted);
}

.kind-series {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.status-badge {
  background: #fff7ed;
  color: #9a3412;
}

.product-title {
  display: block;
  margin-right: 38px;
  font-size: clamp(1.18rem, 2vw, 1.52rem);
  font-weight: 760;
  letter-spacing: -0.03em;
  line-height: 1.18;
}

.product-summary {
  display: block;
  max-width: 780px;
  color: var(--muted);
  font-size: 0.98rem;
}

.product-detail-body {
  display: grid;
  gap: 22px;
  padding: 0 24px 26px;
}

.product-description {
  max-width: 820px;
  margin: 0;
  color: var(--muted);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.detail-section {
  min-width: 0;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.detail-section h3 {
  margin: 0 0 10px;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.detail-section ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.properties-section {
  grid-column: 1 / -1;
}

.table-scroll {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 420px;
  color: var(--muted);
  font-size: 0.94rem;
}

caption {
  margin-bottom: 8px;
  color: var(--quiet);
  text-align: left;
  font-size: 0.82rem;
}

th,
td {
  border-top: 1px solid var(--line);
  padding: 10px 8px;
  text-align: left;
  vertical-align: top;
}

th {
  width: 42%;
  color: var(--ink);
  font-weight: 750;
}

.no-properties {
  margin: 0;
  color: var(--muted);
}

.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  padding-top: 2px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 18px;
  color: var(--ink);
  background: #fff;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.button.primary:hover {
  background: var(--accent-hover);
}

.button.secondary {
  background: rgb(255 255 255 / 0.74);
}

.text-link {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

.qualification-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  border-radius: var(--radius);
  background: var(--line);
  overflow: hidden;
}

.qualification-grid p {
  min-height: 120px;
  background: #fff;
  padding: 22px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 34px 0 50px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer p {
  max-width: 760px;
  margin: 0;
}

.site-footer strong {
  color: var(--ink);
}

@media (max-width: 920px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .catalog-layout,
  .results-toolbar,
  .qualification-grid {
    grid-template-columns: 1fr;
  }

  .catalog-sidebar {
    position: static;
  }

  .catalog-menu {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .category-link-all {
    grid-column: 1 / -1;
  }

  .catalog-count {
    margin-bottom: 0;
    white-space: normal;
  }
}

@media (max-width: 640px) {
  .site-header,
  .section-shell {
    width: min(100% - 28px, var(--max));
  }

  .nav {
    align-items: stretch;
    flex-direction: column;
    width: 100%;
    gap: 8px;
  }

  .nav a {
    display: flex;
    align-items: center;
    min-height: 44px;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 5rem);
  }

  .catalog-menu,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  summary,
  .product-detail-body,
  .results-toolbar,
  .empty-state {
    padding-inline: 18px;
  }

  .product-actions,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}