:root {
  color-scheme: dark;
  --bg: #06090d;
  --panel: #0b1118;
  --panel-soft: #101a23;
  --text: #eef6f8;
  --muted: #9db0b9;
  --subtle: #62757f;
  --line: rgba(169, 219, 226, 0.18);
  --cyan: #4dd9e8;
  --green: #73d28b;
  --amber: #dfad62;
  --white-soft: rgba(255, 255, 255, 0.9);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 18% 18%, rgba(77, 217, 232, 0.08), transparent 32rem),
    linear-gradient(180deg, #06090d 0%, #081017 45%, #05080c 100%);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.5;
}

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

.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 3vw, 3rem);
  background: rgba(6, 9, 13, 0.72);
  border-bottom: 1px solid rgba(169, 219, 226, 0.12);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.hero-actions,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.65rem;
  font-weight: 720;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid rgba(77, 217, 232, 0.38);
  background: linear-gradient(135deg, rgba(77, 217, 232, 0.2), rgba(115, 210, 139, 0.12));
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 800;
}

.nav-links {
  gap: clamp(0.8rem, 2vw, 1.8rem);
  color: var(--muted);
  font-size: 0.92rem;
}

.nav-links a {
  padding: 0.35rem 0;
}

.nav-links a:hover {
  color: var(--text);
}

.hero {
  position: relative;
  display: grid;
  min-height: 92svh;
  overflow: hidden;
  isolation: isolate;
  padding: 8rem clamp(1.25rem, 5vw, 5rem) 4.5rem;
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-media {
  background-image: url("assets/entrofusion-digital-twin-hero.png");
  background-position: center right;
  background-size: cover;
  transform: scale(1.02);
}

.hero-overlay {
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(6, 9, 13, 0.96) 0%, rgba(6, 9, 13, 0.84) 31%, rgba(6, 9, 13, 0.2) 72%),
    linear-gradient(0deg, rgba(6, 9, 13, 0.96) 0%, rgba(6, 9, 13, 0.18) 42%, rgba(6, 9, 13, 0.44) 100%);
}

.hero-content {
  width: min(46rem, 100%);
  align-self: center;
}

.eyebrow,
.section-kicker {
  margin: 0 0 1rem;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1.3rem;
  max-width: 12ch;
  font-size: clamp(3.4rem, 9vw, 7.8rem);
  line-height: 0.9;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 43rem;
  color: var(--white-soft);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.8rem 1rem;
  border: 1px solid transparent;
  font-weight: 760;
}

.button-primary {
  background: var(--text);
  color: #061015;
}

.button-secondary {
  border-color: rgba(238, 246, 248, 0.22);
  background: rgba(6, 9, 13, 0.42);
  color: var(--text);
}

.button:hover {
  transform: translateY(-1px);
}

.section {
  padding: clamp(4rem, 9vw, 7rem) clamp(1.25rem, 5vw, 5rem);
}

.split,
.section-heading,
.moonshot-layout,
.closing-panel {
  width: min(1120px, 100%);
  margin-inline: auto;
}

.split,
.moonshot-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(2rem, 6vw, 5rem);
}

.intro-section {
  background: #06090d;
  border-top: 1px solid rgba(169, 219, 226, 0.12);
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 5vw, 4.25rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 0.8rem;
  font-size: 1.15rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.prose p,
.section-heading p,
.capability-card p,
.moonshot-lead,
.moonshot-item p,
.closing-panel p {
  color: var(--muted);
}

.prose p,
.moonshot-lead,
.closing-panel p {
  font-size: clamp(1rem, 1.7vw, 1.16rem);
}

.prose p:last-child,
.capability-card p:last-child,
.moonshot-item p:last-child,
.closing-panel p:last-child {
  margin-bottom: 0;
}

.work-section {
  background: linear-gradient(180deg, #081017, #0a0f14);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2rem;
}

.section-heading p {
  max-width: 31rem;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  width: min(1120px, 100%);
  margin-inline: auto;
  border: 1px solid var(--line);
  background: var(--line);
  box-shadow: var(--shadow);
}

.capability-card {
  min-height: 17rem;
  padding: 1.4rem;
  background:
    linear-gradient(180deg, rgba(16, 26, 35, 0.96), rgba(8, 14, 20, 0.96));
}

.card-index {
  display: block;
  margin-bottom: 4rem;
  color: var(--amber);
  font-size: 0.8rem;
  font-weight: 800;
}

.moonshot-section {
  background:
    linear-gradient(180deg, rgba(6, 9, 13, 0.22), rgba(6, 9, 13, 0.95)),
    radial-gradient(circle at 75% 25%, rgba(115, 210, 139, 0.09), transparent 25rem),
    #06090d;
}

.moonshot-lead {
  max-width: 35rem;
}

.moonshot-list {
  display: grid;
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.moonshot-item {
  display: grid;
  grid-template-columns: minmax(9rem, 0.55fr) minmax(0, 1fr);
  gap: 1rem;
  padding: 1.1rem;
  background: rgba(11, 17, 24, 0.82);
}

.moonshot-item span {
  color: var(--text);
  font-weight: 800;
}

.moonshot-item p {
  margin-bottom: 0;
}

.closing-section {
  padding-top: 0;
  background: #06090d;
}

.closing-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 2rem;
  padding: clamp(1.5rem, 4vw, 2.25rem);
  border: 1px solid rgba(169, 219, 226, 0.18);
  background:
    linear-gradient(135deg, rgba(77, 217, 232, 0.1), transparent 38%),
    rgba(11, 17, 24, 0.88);
}

.closing-panel h2 {
  font-size: clamp(1.8rem, 3.5vw, 3rem);
}

.site-footer {
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem clamp(1.25rem, 5vw, 5rem);
  border-top: 1px solid rgba(169, 219, 226, 0.12);
  color: var(--subtle);
  font-size: 0.9rem;
}

.site-footer span:first-child {
  color: var(--text);
  font-weight: 800;
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hero {
    min-height: 88svh;
    padding-top: 7rem;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(6, 9, 13, 0.97) 0%, rgba(6, 9, 13, 0.76) 58%, rgba(6, 9, 13, 0.3) 100%),
      linear-gradient(0deg, rgba(6, 9, 13, 0.98) 0%, rgba(6, 9, 13, 0.24) 54%, rgba(6, 9, 13, 0.52) 100%);
  }

  .split,
  .section-heading,
  .moonshot-layout,
  .closing-panel {
    display: grid;
    grid-template-columns: 1fr;
  }

  .section-heading {
    align-items: start;
  }

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

@media (max-width: 620px) {
  .site-header {
    position: absolute;
  }

  .hero {
    min-height: 88svh;
    padding: 6.5rem 1rem 3rem;
  }

  h1 {
    font-size: clamp(3rem, 16vw, 4.4rem);
    max-width: 10ch;
  }

  .hero-copy {
    font-size: 1rem;
  }

  .button {
    width: 100%;
  }

  .capability-grid,
  .moonshot-list {
    grid-template-columns: 1fr;
  }

  .capability-card {
    min-height: 13rem;
  }

  .card-index {
    margin-bottom: 2rem;
  }

  .moonshot-item {
    grid-template-columns: 1fr;
  }

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