:root {
  --color-primary: #0f172a;
  --color-secondary: #334155;
  --color-accent: #0369a1;
  --color-accent-strong: #075985;
  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-foreground: #020617;
  --color-muted: #e8ecf1;
  --color-muted-text: #526072;
  --color-border: #dbe3ec;
  --color-error: #b91c1c;
  --focus-ring: 0 0 0 3px rgb(3 105 161 / 0.28);
  --radius-sm: 8px;
  --radius-md: 12px;
  --container: 78rem;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --shadow-menu: 0 18px 50px rgb(15 23 42 / 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-foreground);
  font-family: "Source Sans 3", "Segoe UI", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

a {
  color: var(--color-accent-strong);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
.button,
summary,
a[href] {
  touch-action: manipulation;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-180%);
  transition: transform 160ms var(--ease-out);
}

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

.container {
  width: min(calc(100% - 2.5rem), var(--container));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  min-height: 4.75rem;
  border-bottom: 1px solid rgb(219 227 236 / 0.9);
  background: rgb(248 250 252 / 0.94);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  min-height: 4.75rem;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-primary);
  font-family: Lexend, "Segoe UI", sans-serif;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.45rem;
  white-space: nowrap;
}

.langswitch {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--color-border);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1;
}

.langswitch a {
  display: inline-grid;
  min-width: 2rem;
  min-height: 2rem;
  place-items: center;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.langswitch a[aria-current="true"] {
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
}

.site-nav a {
  color: var(--color-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  color: var(--color-accent-strong);
}

.nav-cta {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: #fff !important;
}

.menu-toggle {
  display: none;
  min-width: 2.75rem;
  min-height: 2.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-primary);
  cursor: pointer;
}

main {
  overflow: clip;
}

.breadcrumb {
  padding-block: 1.15rem;
  color: var(--color-muted-text);
  font-size: 0.9rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 0.5rem;
  color: #94a3b8;
}

.breadcrumb a {
  color: inherit;
}

.hero {
  padding: clamp(3.5rem, 8vw, 7.5rem) 0 clamp(3.5rem, 7vw, 6.5rem);
  background:
    linear-gradient(120deg, rgb(3 105 161 / 0.08), transparent 42%),
    var(--color-background);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(22rem, 1.08fr);
  align-items: center;
  gap: clamp(2.5rem, 6vw, 5rem);
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--color-accent-strong);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--color-primary);
  font-family: Lexend, "Segoe UI", sans-serif;
  line-height: 1.15;
  text-wrap: balance;
}

h1 {
  max-width: 14ch;
  margin-bottom: 1.35rem;
  font-size: clamp(2.55rem, 5.4vw, 5.3rem);
  letter-spacing: -0.055em;
}

.page-hero h1 {
  max-width: 18ch;
  font-size: clamp(2.35rem, 4.8vw, 4.8rem);
}

h2 {
  font-size: clamp(1.8rem, 3.2vw, 3.2rem);
  letter-spacing: -0.04em;
}

h3 {
  font-size: clamp(1.12rem, 2vw, 1.45rem);
  letter-spacing: -0.02em;
}

.hero-copy,
.lede {
  max-width: 42rem;
  color: var(--color-secondary);
  font-size: clamp(1.08rem, 1.8vw, 1.3rem);
}

.hero-actions,
.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.1rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color 180ms var(--ease-out),
    border-color 180ms var(--ease-out),
    color 180ms var(--ease-out),
    transform 140ms var(--ease-out);
}

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

.button:active {
  transform: scale(0.97);
}

.hero-media {
  position: relative;
  min-width: 0;
}

.hero-media::before {
  position: absolute;
  z-index: -1;
  inset: -1.25rem 1.75rem 1.5rem -1.25rem;
  border: 1px solid var(--color-border);
  content: "";
}

.hero-media img {
  width: 100%;
  min-height: 26rem;
  border-radius: var(--radius-sm);
  object-fit: cover;
  box-shadow: 0 22px 60px rgb(15 23 42 / 0.12);
}

.image-note {
  margin: 0.7rem 0 0;
  color: var(--color-muted-text);
  font-size: 0.85rem;
}

.section {
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.section.surface {
  background: var(--color-surface);
}

.section.muted {
  background: #edf3f7;
}

.section-heading {
  max-width: 50rem;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section-heading p {
  max-width: 42rem;
  color: var(--color-secondary);
  font-size: 1.08rem;
}

.path-grid,
.product-grid,
.resource-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.path-item,
.product-item,
.resource-item {
  min-width: 0;
  padding: clamp(1.4rem, 3vw, 2.2rem);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.path-item a,
.product-item a,
.resource-item a {
  color: var(--color-primary);
  text-decoration: none;
}

.path-item p,
.product-item p,
.resource-item p {
  color: var(--color-muted-text);
}

.index-number {
  display: block;
  margin-bottom: 2.5rem;
  color: var(--color-accent-strong);
  font-size: 0.8rem;
  font-weight: 700;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}

.split.reverse {
  grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
}

.split img {
  width: 100%;
  min-height: 24rem;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

.check-list,
.plain-list {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.check-list li,
.plain-list li {
  position: relative;
  padding: 0.8rem 0 0.8rem 1.75rem;
  border-bottom: 1px solid var(--color-border);
}

.check-list li::before {
  position: absolute;
  top: 1.15rem;
  left: 0;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--color-accent);
  content: "";
}

.spec-band {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 2.5rem 0;
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.spec-band div {
  min-width: 0;
  padding: 1.2rem;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.spec-band dt {
  color: var(--color-muted-text);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.spec-band dd {
  margin: 0.45rem 0 0;
  color: var(--color-primary);
  font-weight: 600;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
}

caption {
  padding: 1rem;
  color: var(--color-secondary);
  font-weight: 600;
  text-align: left;
}

th,
td {
  min-width: 10rem;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

th {
  background: #eef4f8;
  color: var(--color-primary);
  font-size: 0.9rem;
}

.notice {
  padding: 1.2rem 1.35rem;
  border-left: 4px solid var(--color-accent);
  background: #eaf4f9;
  color: var(--color-secondary);
}

.status-badge {
  display: inline-block;
  padding: 0.3rem 0.55rem;
  border-radius: 0.3rem;
  background: var(--color-muted);
  color: var(--color-secondary);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.cta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 2rem;
  padding: clamp(2rem, 5vw, 4rem);
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #dce8f1;
}

.cta-panel h2 {
  max-width: 17ch;
  margin-bottom: 0.9rem;
  color: #fff;
}

.cta-panel p {
  max-width: 44rem;
  margin: 0;
}

.cta-panel .button.secondary {
  border-color: #fff;
  color: #fff;
}

.form-shell {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}

.rfq-form {
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

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

.field {
  margin-bottom: 1rem;
}

.field.full {
  grid-column: 1 / -1;
}

label,
legend {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--color-primary);
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  min-height: 3rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid #9ca9b8;
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-foreground);
}

textarea {
  min-height: 8rem;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--color-accent);
  outline: none;
  box-shadow: var(--focus-ring);
}

.field-help,
.form-note,
.form-status {
  color: var(--color-muted-text);
  font-size: 0.9rem;
}

.form-status[role="alert"] {
  color: var(--color-error);
}

details.engineering-fields {
  margin: 1.2rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

details.engineering-fields summary {
  min-height: 3rem;
  padding: 0.8rem 0;
  color: var(--color-primary);
  font-weight: 700;
  cursor: pointer;
}

.detail-fields {
  padding: 0.5rem 0 1rem;
}

.site-footer {
  padding: 4rem 0 2rem;
  background: #0b1220;
  color: #b9c7d8;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 2rem;
}

.site-footer h2,
.site-footer h3 {
  color: #fff;
}

.site-footer h3 {
  font-size: 1rem;
}

.site-footer a {
  color: #dce8f1;
}

.site-footer ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer li + li {
  margin-top: 0.55rem;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgb(255 255 255 / 0.14);
  font-size: 0.88rem;
}

.reveal {
  opacity: 1;
  transform: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity 360ms var(--ease-out),
    transform 360ms var(--ease-out);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (hover: hover) and (pointer: fine) {
  .nav-cta:hover,
  .button:hover {
    background: var(--color-accent-strong);
    text-decoration: none;
  }

  .button.secondary:hover {
    background: var(--color-primary);
    color: #fff;
  }

  .path-item a:hover,
  .product-item a:hover,
  .resource-item a:hover {
    color: var(--color-accent-strong);
  }

  .langswitch a:hover {
    background: var(--color-surface-muted);
    color: var(--color-accent-strong);
  }
}

@media (max-width: 64rem) {
  .site-nav {
    gap: 0.9rem;
  }

  .hero-grid,
  .split,
  .split.reverse,
  .form-shell {
    grid-template-columns: 1fr;
  }

  .hero-media {
    max-width: 48rem;
  }

  .path-grid,
  .product-grid,
  .resource-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1.4fr repeat(2, 1fr);
  }
}

@media (max-width: 48rem) {
  .site-header {
    min-height: 6.75rem;
  }

  .header-inner {
    min-height: 6.75rem;
    flex-wrap: wrap;
    padding-block: 0.55rem;
  }

  .langswitch {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-top: 0.35rem;
    padding-left: 0;
    border-top: 1px solid var(--color-border);
    border-left: 0;
    scrollbar-width: thin;
  }

  .menu-toggle {
    display: inline-grid;
    place-items: center;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 1.25rem;
    left: 1.25rem;
    display: grid;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    box-shadow: var(--shadow-menu);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px) scale(0.98);
    transform-origin: top right;
    transition:
      opacity 160ms var(--ease-out),
      transform 160ms var(--ease-out);
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
  }

  .site-nav a {
    display: flex;
    min-height: 2.75rem;
    align-items: center;
  }

  .hero {
    padding-top: 3rem;
  }

  .hero-grid {
    gap: 3rem;
  }

  .hero-media img {
    min-height: 20rem;
  }

  .path-grid,
  .product-grid,
  .resource-grid,
  .spec-band,
  .field-grid,
  .cta-panel,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .cta-panel {
    align-items: start;
  }

  .footer-bottom {
    flex-direction: column;
  }
}

@media (max-width: 30rem) {
  .container {
    width: min(calc(100% - 2rem), var(--container));
  }

  .brand-mark {
    width: 2rem;
    height: 2rem;
  }

  h1 {
    font-size: 2.45rem;
  }

  .hero-actions,
  .action-row {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}