:root {
  --blueprint: #082f5f;
  --blueprint-dark: #061f42;
  --line: rgba(190, 229, 255, .28);
  --text: #eef8ff;
  --muted: #a8c4d8;
  --paper: #d8f0ff;
  --orange: #ffb020;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text);
  font-family: Archivo, Arial, sans-serif;
  background:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px),
    linear-gradient(135deg, var(--blueprint), var(--blueprint-dark));
  background-size: 42px 42px, 42px 42px, auto;
}

a { color: inherit; text-decoration: none; }

.blueprint-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
  width: min(1320px, calc(100% - 28px));
  margin: 14px auto 0;
  padding: 10px;
  border: 2px solid var(--paper);
  background: rgba(6, 31, 66, .84);
  backdrop-filter: blur(14px);
}

.stamp {
  display: grid;
  grid-template-columns: 70px 170px;
  align-items: stretch;
  border: 2px solid var(--paper);
}
.stamp span {
  display: grid;
  place-items: center;
  border-right: 2px solid var(--paper);
  color: var(--orange);
  font: 900 26px "Roboto Mono", monospace;
}
.stamp strong {
  display: grid;
  place-items: center;
  padding: 8px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.blueprint-header nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
}
.blueprint-header nav a {
  padding: 12px 16px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-weight: 900;
  text-transform: uppercase;
  font-size: 12px;
}
.blueprint-header nav a:hover { color: var(--blueprint-dark); background: var(--paper); }

.lang-switch { display: flex; gap: 6px; }
.lang-btn {
  border: 1px solid var(--paper);
  padding: 10px 12px;
  color: var(--paper);
  background: transparent;
  cursor: pointer;
  font: 800 12px "Roboto Mono", monospace;
}
.lang-btn.active { color: var(--blueprint-dark); background: var(--paper); }

main, .contact {
  width: min(1320px, calc(100% - 28px));
  margin: 0 auto;
}

.hero-blueprint {
  min-height: 760px;
  display: grid;
  grid-template-columns: 1fr 390px;
  gap: 24px;
  align-items: stretch;
  padding: 28px 0 90px;
}

.drawing-title {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(28px, 6vw, 76px);
  border: 2px solid var(--paper);
  background:
    linear-gradient(135deg, rgba(216,240,255,.12), transparent 38%),
    rgba(6, 31, 66, .38);
}

.mono {
  margin: 0 0 16px;
  color: var(--orange);
  font: 700 12px "Roboto Mono", monospace;
  letter-spacing: .16em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 930px;
  margin-bottom: 24px;
  font-size: clamp(46px, 7.5vw, 118px);
  line-height: .82;
  letter-spacing: -.07em;
  text-transform: uppercase;
}
h2 {
  margin-bottom: 22px;
  font-size: clamp(32px, 5vw, 76px);
  line-height: .9;
  letter-spacing: -.055em;
  text-transform: uppercase;
}
h3 { margin-bottom: 10px; font-size: 24px; text-transform: uppercase; }
p { color: var(--muted); line-height: 1.7; }
.drawing-title p:last-child { max-width: 780px; font-size: 18px; }

.object-card {
  display: grid;
  align-content: end;
  border: 2px solid var(--paper);
  background: rgba(6, 31, 66, .78);
}
.object-card div {
  display: grid;
  gap: 8px;
  padding: 22px;
  border-bottom: 2px solid var(--paper);
}
.object-card span {
  color: var(--muted);
  font: 700 12px "Roboto Mono", monospace;
  text-transform: uppercase;
}
.object-card b { color: var(--paper); text-transform: uppercase; }
.object-card a {
  display: grid;
  place-items: center;
  min-height: 74px;
  color: var(--blueprint-dark);
  background: var(--orange);
  font-weight: 900;
  text-transform: uppercase;
  text-align: center;
}

.passport, .systems, .spec, .commissioning { padding: 88px 0; }
.sheet-title { max-width: 980px; margin-bottom: 30px; }

.passport-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 2px solid var(--paper);
  border-left: 2px solid var(--paper);
}
.passport-grid article {
  min-height: 360px;
  padding: 24px;
  border-right: 2px solid var(--paper);
  border-bottom: 2px solid var(--paper);
  background: rgba(8, 47, 95, .42);
}
.passport-grid span, .route b {
  display: inline-flex;
  margin-bottom: 78px;
  color: var(--orange);
  font: 800 13px "Roboto Mono", monospace;
}

.systems {
  position: relative;
  display: grid;
  gap: 0;
}
.axis-label {
  width: max-content;
  margin-bottom: 14px;
  padding: 8px 12px;
  color: var(--blueprint-dark);
  background: var(--paper);
  font: 800 12px "Roboto Mono", monospace;
}
.system-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  border-top: 2px solid var(--paper);
}
.system-row:last-child { border-bottom: 2px solid var(--paper); }
.layer-id {
  display: grid;
  place-items: center;
  border-right: 2px solid var(--paper);
  color: var(--orange);
  font: 900 54px "Roboto Mono", monospace;
}
.system-row article { padding: 28px; background: rgba(6,31,66,.52); }

.spec-table {
  border-top: 2px solid var(--paper);
  border-left: 2px solid var(--paper);
}
.spec-table > div {
  display: grid;
  grid-template-columns: .8fr 1.2fr 1fr;
}
.spec-table span {
  min-height: 86px;
  padding: 18px;
  border-right: 2px solid var(--paper);
  border-bottom: 2px solid var(--paper);
  color: var(--text);
}
.spec-head span {
  min-height: auto;
  color: var(--blueprint-dark);
  background: var(--paper);
  font-weight: 900;
  text-transform: uppercase;
}

.commissioning {
  display: grid;
  grid-template-columns: 390px 1fr;
  gap: 24px;
}
.route-title {
  position: sticky;
  top: 110px;
  align-self: start;
  padding: 28px;
  border: 2px solid var(--paper);
  background: rgba(6,31,66,.72);
}
.route {
  display: grid;
  grid-template-columns: repeat(5, minmax(220px, 1fr));
  overflow-x: auto;
  border-top: 2px solid var(--paper);
  border-left: 2px solid var(--paper);
}
.route article {
  min-height: 420px;
  padding: 22px;
  border-right: 2px solid var(--paper);
  border-bottom: 2px solid var(--paper);
  background: rgba(8,47,95,.48);
}

.contact {
  display: grid;
  grid-template-columns: 1fr .78fr;
  gap: 24px;
  margin-bottom: 28px;
  padding: 28px;
  border: 2px solid var(--paper);
  background: rgba(6,31,66,.86);
}
address {
  display: grid;
  align-content: center;
  gap: 12px;
  font-style: normal;
}
address a, address span {
  padding: 18px;
  border: 1px solid var(--line);
  color: var(--paper);
}

@media (max-width: 980px) {
  .blueprint-header, .hero-blueprint, .commissioning, .contact { grid-template-columns: 1fr; }
  .passport-grid { grid-template-columns: repeat(2, 1fr); }
  .route-title { position: static; }
}

@media (max-width: 650px) {
  .stamp { grid-template-columns: 64px 1fr; }
  .passport-grid, .system-row, .spec-table > div { grid-template-columns: 1fr; }
  .layer-id { min-height: 90px; border-right: 0; border-bottom: 2px solid var(--paper); }
}