:root {
  --bg: #f5f0e8;
  --panel: #fffdf8;
  --ink: #1a1208;
  --muted: #6b5f4a;
  --oxide: #8b4513;
  --copper: #c17f3a;
  --line: #d9cdb8;
  --cream: #fef3dc;
  --khaki: #c9b99a;
  --brown: #5c3317;

  --max: 1500px;
  --header-h: 76px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(rgba(26, 18, 8, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 18, 8, 0.035) 1px, transparent 1px),
    var(--bg);
  background-size: 60px 60px;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}

a {
  color: inherit;
}

.site-shell {
  min-height: 100vh;
}

.site-header {
  height: var(--header-h);
  width: 100%;
  padding: 0 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 253, 248, 0.96);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--cream);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.brand-text {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.brand-text strong {
  font-size: 0.98rem;
  font-weight: 900;
}

.brand-text small {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  height: 100%;
}

.site-nav a {
  height: 100%;
  display: flex;
  align-items: center;
  color: var(--muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.68rem;
  font-weight: 900;
  border-bottom: 2px solid transparent;
}

.site-nav a.active,
.site-nav a:hover {
  color: var(--oxide);
  border-bottom-color: var(--oxide);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: transparent;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

/* HERO */

.page-hero {
  width: 100%;
  min-height: calc(100vh - var(--header-h));
  padding: 54px 48px;
  display: grid;
  grid-template-columns: minmax(360px, 0.48fr) minmax(620px, 1fr);
  gap: 48px;
  align-items: stretch;
  border-bottom: 1px solid var(--line);
}

.hero-copy-block {
  max-width: 560px;
  align-self: center;
}

.kicker {
  margin: 0 0 18px;
  color: var(--oxide);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.7rem;
  font-weight: 900;
}

.hero-copy-block h1,
.content-section h1 {
  margin: 0;
  font-size: clamp(2.35rem, 3.7vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
  font-weight: 900;
}

.hero-subtitle {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 32px;
}

.button {
  min-height: 44px;
  padding: 0 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.68rem;
  font-weight: 900;
}

.button-primary {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--cream);
}

.button:hover {
  border-color: var(--copper);
  color: var(--oxide);
}

/* MODEL PANEL */

.hero-model-panel {
  min-height: 680px;
  padding: 22px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background:
    linear-gradient(rgba(254, 243, 220, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(254, 243, 220, 0.035) 1px, transparent 1px),
    var(--ink);
  background-size: 42px 42px;
  color: var(--cream);
  border-left: 5px solid var(--copper);
  position: relative;
  overflow: hidden;
}

.hero-model-panel::before {
  content: "";
  position: absolute;
  inset: 22px;
  border: 1px solid rgba(254, 243, 220, 0.12);
  pointer-events: none;
}

.panel-topline {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(254, 243, 220, 0.18);
  color: rgba(254, 243, 220, 0.72);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.64rem;
  font-weight: 900;
}

.product-model,
model-viewer.product-model {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  min-height: 560px;
  display: block;
  background: transparent;
  filter:
    drop-shadow(0 0 12px rgba(193, 127, 58, 0.5))
    drop-shadow(0 0 42px rgba(193, 127, 58, 0.24));
}

.hero-model-panel p {
  position: relative;
  z-index: 2;
  max-width: 680px;
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(254, 243, 220, 0.18);
  color: rgba(254, 243, 220, 0.7);
  font-size: 0.9rem;
  line-height: 1.55;
}

model-viewer::part(default-progress-bar) {
  display: none;
}

/* FALLBACK BLUEPRINT */

.blueprint-panel {
  min-height: 680px;
  background: var(--ink);
  border-left: 5px solid var(--copper);
  position: relative;
  overflow: hidden;
}

.blueprint-grid {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(254, 243, 220, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(254, 243, 220, 0.06) 1px, transparent 1px);
  background-size: 42px 42px;
}

.blueprint-readout {
  position: absolute;
  left: 28px;
  bottom: 28px;
  color: var(--cream);
}

.blueprint-readout span,
.blueprint-readout small {
  display: block;
  color: rgba(254, 243, 220, 0.65);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.68rem;
  font-weight: 900;
}

.blueprint-readout strong {
  display: block;
  margin: 10px 0;
  font-size: 3rem;
}

/* CONTENT SECTIONS */

.content-section {
  width: min(var(--max), calc(100% - 96px));
  margin: 0 auto;
  padding: 90px 0;
  border-bottom: 1px solid var(--line);
}

.content-section h1 {
  max-width: 920px;
  margin-bottom: 32px;
}

.section-body {
  max-width: 820px;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.75;
}

/* BLUEPRINT SECTION */

.blueprint-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: start;
}

.blueprint-list {
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.55);
}

.blueprint-list div {
  min-height: 74px;
  display: grid;
  grid-template-columns: 84px 1fr;
  align-items: center;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.blueprint-list span {
  height: 100%;
  display: grid;
  place-items: center;
  color: var(--oxide);
  border-right: 1px solid var(--line);
  font-size: 0.72rem;
  font-weight: 900;
}

.blueprint-list strong {
  padding: 0 22px;
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* MATRIX */

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.matrix-card {
  min-height: 300px;
  padding: 26px;
  background: rgba(255, 253, 248, 0.66);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.matrix-card span {
  color: var(--oxide);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.matrix-card h2 {
  margin: 34px 0 16px;
  font-size: 1.18rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.matrix-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

/* DOMAINS */

.domain-map {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.domain-map article {
  min-height: 340px;
  padding: 30px;
  background: rgba(255, 253, 248, 0.62);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.domain-map span {
  color: var(--oxide);
  font-size: 3.8rem;
  line-height: 1;
  font-weight: 900;
  letter-spacing: -0.08em;
}

.domain-map h2 {
  margin: 34px 0 14px;
  font-size: 1.3rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.domain-map p {
  color: var(--muted);
  line-height: 1.7;
}

/* PRINCIPLES */

.principle-table {
  border-top: 1px solid var(--line);
}

.principle-table article {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 48px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.principle-table h2 {
  margin: 0;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.principle-table p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

/* LOGBOOK / FIELD NOTES */

.logbook {
  border-top: 1px solid var(--line);
}

.logbook article {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 40px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.logbook time {
  color: var(--oxide);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.logbook h2 {
  margin: 0 0 10px;
  font-size: 1.18rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.logbook p {
  max-width: 820px;
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

/* PUBLICATIONS */

.publication-list {
  border-top: 1px solid var(--line);
}

.publication-list article {
  display: grid;
  grid-template-columns: 160px 1fr 2fr 160px;
  gap: 28px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.publication-list time {
  color: var(--oxide);
  font-size: 0.72rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.publication-list h2 {
  margin: 0;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.publication-list p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.publication-list a {
  color: var(--oxide);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.68rem;
  font-weight: 900;
  text-decoration: none;
}

/* CASE STUDIES */

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.case-grid article {
  min-height: 260px;
  padding: 28px;
  background: rgba(255, 253, 248, 0.62);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.case-grid span {
  color: var(--oxide);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.case-grid h2 {
  margin: 30px 0 12px;
  font-size: 1.18rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.case-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

/* CONTACT */

.contact-grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.contact-grid a,
.contact-grid span {
  min-height: 110px;
  padding: 28px;
  display: flex;
  align-items: center;
  background: rgba(255, 253, 248, 0.62);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
  font-weight: 900;
}

/* FOOTER */

.site-footer {
  width: 100%;
  padding: 30px 48px;
  display: flex;
  justify-content: space-between;
  gap: 32px;
  background: var(--panel);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer div {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

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

.site-footer span {
  font-size: 0.82rem;
}

/* ANIMATION */

[data-animate] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 650ms ease var(--delay, 0ms),
    transform 650ms ease var(--delay, 0ms);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* RESPONSIVE */

@media (max-width: 1200px) {
  .page-hero {
    grid-template-columns: 1fr;
  }

  .hero-copy-block {
    max-width: 760px;
  }

  .hero-model-panel {
    min-height: 620px;
  }

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

  .blueprint-section,
  .principle-table article,
  .publication-list article {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .site-header {
    height: auto;
    min-height: var(--header-h);
    padding: 16px 24px;
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .brand-text {
    flex-direction: column;
    gap: 2px;
  }

  .nav-toggle {
    display: block;
    margin-left: auto;
  }

  .site-nav {
    display: none;
    width: 100%;
    height: auto;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding-top: 16px;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    width: 100%;
    height: auto;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }

  .page-hero {
    min-height: auto;
    padding: 44px 24px;
  }

  .hero-copy-block h1,
  .content-section h1 {
    font-size: clamp(2.1rem, 10vw, 3.4rem);
  }

  .hero-model-panel {
    min-height: 520px;
  }

  .product-model,
  model-viewer.product-model {
    min-height: 400px;
  }

  .content-section {
    width: calc(100% - 48px);
    padding: 64px 0;
  }

  .matrix-grid,
  .domain-map,
  .case-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .logbook article {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .site-footer {
    padding: 24px;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .page-hero {
    padding: 36px 18px;
  }

  .content-section {
    width: calc(100% - 36px);
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-model-panel {
    padding: 16px;
    min-height: 460px;
  }

  .product-model,
  model-viewer.product-model {
    min-height: 340px;
  }
}