:root {
  --primary: #00727a;
  --primary-dark: #005f67;
  --ink: #173338;
  --muted: #5f6b72;
  --line: #d9e6e8;
  --soft: #eef8f9;
  --paper: #ffffff;
  --canvas: #f6f8f9;
  --ok: #027a48;
  --warn: #8a5a00;
  --shadow: 0 8px 24px rgba(23, 51, 56, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--canvas);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  margin: 0;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--primary-dark);
}

img {
  display: block;
  max-width: 100%;
}

.site-header {
  align-items: center;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 24px;
  justify-content: space-between;
  min-height: 68px;
  padding: 10px 28px;
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  align-items: center;
  color: var(--ink);
  display: inline-flex;
  font-weight: 800;
  gap: 12px;
  min-width: 250px;
}

.brand img {
  height: 42px;
  width: auto;
}

.brand span {
  border-left: 1px solid var(--line);
  padding-left: 12px;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: flex-end;
}

.main-nav a {
  border-radius: 5px;
  color: var(--primary);
  font-weight: 800;
  padding: 8px 10px;
}

.main-nav a:hover,
.main-nav a.active {
  background: var(--soft);
  color: var(--primary-dark);
}

.portal-page {
  padding: 34px clamp(18px, 4vw, 48px);
  scroll-margin-top: 78px;
}

.home-page {
  align-content: start;
  display: grid;
  gap: 22px;
  min-height: calc(100vh - 138px);
}

.page-title {
  display: grid;
  gap: 7px;
  max-width: 900px;
}

.eyebrow {
  color: var(--primary);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  margin: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  color: var(--ink);
  line-height: 1.18;
  margin: 0;
}

h1 {
  font-size: clamp(30px, 4vw, 48px);
}

h2 {
  font-size: clamp(26px, 3vw, 36px);
}

h3 {
  font-size: 21px;
  overflow-wrap: anywhere;
}

h4 {
  font-size: 17px;
}

.page-title p,
.panel-title p,
.panel p,
.product-tile small,
.download-row small,
.equivalent-row small,
.empty-state span {
  color: var(--muted);
  margin: 0;
  overflow-wrap: anywhere;
}

.selector-panel,
.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 4px solid var(--primary);
  box-shadow: var(--shadow);
}

.selector-panel {
  display: grid;
  gap: 10px;
  max-width: 640px;
  padding: 18px;
}

.product-selector-panel {
  margin-top: 8px;
}

.selector-panel label,
.model-selector span {
  color: var(--ink);
  font-weight: 800;
}

.inline-control {
  display: grid;
  gap: 10px;
  grid-template-columns: minmax(0, 1fr) auto;
}

select,
button,
.button {
  border-radius: 5px;
  font: inherit;
  min-height: 42px;
}

select {
  background: var(--paper);
  border: 1px solid #cfd8dc;
  color: var(--ink);
  padding: 8px 10px;
  width: 100%;
}

button,
.button {
  align-items: center;
  border: 1px solid var(--primary);
  cursor: pointer;
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  padding: 9px 14px;
}

button,
.button.primary {
  background: var(--primary);
  color: white;
}

button:hover,
.button.primary:hover {
  background: var(--primary-dark);
  color: white;
}

.button.secondary {
  background: var(--paper);
  color: var(--primary);
}

.product-menu {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 360px));
}

.product-tile {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  display: grid;
  gap: 9px;
  padding: 14px;
}

.product-tile:hover {
  background: var(--soft);
}

.product-tile img {
  aspect-ratio: 16 / 9;
  background: var(--soft);
  border: 1px solid var(--line);
  object-fit: contain;
  width: 100%;
}

.product-code {
  color: var(--primary);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.landing-layout {
  align-items: start;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr) 340px;
  margin-top: 22px;
}

.option-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.option-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--primary);
  border-radius: 6px;
  box-shadow: var(--shadow);
  color: var(--ink);
  display: grid;
  gap: 8px;
  min-height: 132px;
  padding: 18px;
}

.option-card:hover {
  background: #fbfdfd;
  border-color: #b9d5d9;
  color: var(--ink);
}

.option-card strong {
  font-size: 22px;
  line-height: 1.15;
}

.option-card span {
  color: var(--muted);
}

.product-page-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr) 320px;
  margin: 22px 0;
}

.back-link {
  color: var(--primary);
  display: inline-flex;
  font-weight: 800;
  margin-bottom: 16px;
}

.panel {
  padding: 18px;
}

.panel-title {
  display: grid;
  gap: 6px;
  margin-bottom: 16px;
}

.model-selector {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.model-selector label {
  display: grid;
  gap: 6px;
}

.model-result {
  background: #fbfdfd;
  border: 1px solid var(--line);
  border-radius: 6px;
  margin-top: 16px;
  padding: 16px;
}

.result-label {
  color: var(--ok);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  margin: 0 0 6px;
  text-transform: uppercase;
}

.model-code {
  color: var(--ink);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  line-height: 1;
}

.feature-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 12px;
}

.feature-pills span {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 800;
  padding: 5px 8px;
}

.equivalent-models {
  margin-top: 16px;
}

.equivalent-header {
  align-items: center;
  display: flex;
  gap: 12px;
  justify-content: space-between;
  margin-bottom: 8px;
}

.equivalent-header span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.equivalent-list {
  border: 1px solid var(--line);
  border-radius: 6px;
  max-height: 360px;
  overflow: auto;
}

.equivalent-row {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 3px;
  padding: 11px 12px;
}

.equivalent-row:last-child {
  border-bottom: 0;
}

.product-visual-panel {
  align-self: start;
}

.product-visual-panel img {
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  object-fit: contain;
  width: 100%;
}

.spec-list {
  display: grid;
  gap: 0;
  margin: 14px 0 0;
}

.spec-list div {
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 4px;
  padding: 10px 0;
}

.spec-list dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.spec-list dd {
  font-weight: 800;
  margin: 0;
}

.download-table {
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.download-group {
  background: var(--soft);
  border-bottom: 1px solid var(--line);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  padding: 9px 14px;
  text-transform: uppercase;
}

.download-row {
  align-items: center;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr) auto;
  min-height: 58px;
  padding: 13px 14px;
}

.download-row:last-child {
  border-bottom: 0;
}

.download-row:hover {
  background: #fbfdfd;
}

.download-row span {
  display: grid;
  gap: 3px;
}

.download-row em {
  background: var(--primary);
  border-radius: 999px;
  color: white;
  font-size: 12px;
  font-style: normal;
  font-weight: 900;
  padding: 4px 9px;
}

.stacked-panel {
  margin-top: 18px;
}

.data-table {
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.data-row {
  align-items: center;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(260px, 1.4fr) repeat(3, minmax(112px, 0.45fr));
  padding: 12px 14px;
}

.data-row:last-child {
  border-bottom: 0;
}

.data-head {
  background: var(--soft);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.data-row span {
  min-width: 0;
}

.data-row small {
  color: var(--muted);
  display: block;
  margin-top: 3px;
}

.table-link {
  align-items: center;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 5px;
  display: inline-flex;
  font-weight: 900;
  justify-content: center;
  min-height: 34px;
  padding: 6px 9px;
  text-align: center;
  width: 100%;
}

.table-link:hover {
  background: #e2f1f3;
}

.tool-page {
  margin-top: 22px;
}

.tool-layout {
  align-items: start;
  display: grid;
  gap: 22px;
  grid-template-columns: minmax(0, 1fr) minmax(220px, auto);
}

.tool-layout > * {
  min-width: 0;
}

.tool-layout .button {
  max-width: 100%;
  overflow-wrap: anywhere;
  text-align: center;
  white-space: normal;
}

.check-list {
  color: var(--muted);
  margin: 12px 0 0;
  padding-left: 20px;
}

.check-list li {
  margin-bottom: 7px;
}

.empty-state {
  color: var(--muted);
  display: grid;
  gap: 4px;
  padding: 12px;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.contact-regions {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 22px;
}

.contact-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--primary);
  border-radius: 6px;
  display: grid;
  gap: 8px;
  padding: 16px;
}

.contact-card p {
  color: var(--muted);
}

.contact-card a {
  font-weight: 900;
}

.site-footer {
  align-items: center;
  background: var(--ink);
  color: white;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  padding: 16px 28px;
}

.site-footer span:last-child {
  color: #c8d7da;
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  justify-content: flex-end;
}

.footer-contact a {
  color: #c8d7da;
  font-weight: 700;
}

.footer-contact a:hover {
  color: white;
}

code {
  font-family: Consolas, Monaco, monospace;
}

@media (max-width: 1040px) {
  .product-page-grid,
  .tool-layout,
  .landing-layout,
  .contact-regions {
    grid-template-columns: 1fr;
  }

  .product-visual-panel {
    max-width: 520px;
  }
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding: 12px 16px;
    position: static;
  }

  .brand {
    min-width: 0;
  }

  .main-nav {
    justify-content: flex-start;
  }

  .portal-page {
    padding: 28px 16px;
  }

  .inline-control,
  .model-selector,
  .download-row,
  .option-grid,
  .data-row {
    grid-template-columns: 1fr;
  }

  .equivalent-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-footer,
  .footer-contact {
    align-items: flex-start;
    flex-direction: column;
    justify-content: flex-start;
  }
}