:root {
  --paper: #f5f2ea;
  --paper-soft: #fbfaf4;
  --ink: #10232b;
  --muted: #5e6b68;
  --line: rgba(16, 35, 43, 0.16);
  --oxide: #173b40;
  --oxide-2: #24535a;
  --copper: #b9783d;
  --wafer: #b9d6d2;
  --cream: #fff8e8;
  --shadow: 0 24px 70px rgba(22, 47, 54, 0.14);
  --radius-lg: 34px;
  --radius-md: 22px;
  --max: 1180px;
  --display: "Avenir Next", "Gill Sans", "Trebuchet MS", sans-serif;
  --text: "Iowan Old Style", "Palatino Linotype", Palatino, serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 10%, rgba(185, 214, 210, 0.42), transparent 28rem),
    linear-gradient(115deg, rgba(185, 214, 210, 0.14) 0 1px, transparent 1px 42px),
    var(--paper);
  font-family: var(--text);
  line-height: 1.65;
}

body.nav-open {
  overflow: hidden;
}

a {
  color: inherit;
}

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

p {
  margin: 0;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 100;
  transform: translateY(-180%);
  border-radius: 999px;
  background: var(--ink);
  color: var(--cream);
  padding: 0.75rem 1rem;
  text-decoration: none;
  transition: transform 180ms ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  width: min(var(--max), calc(100% - 32px));
  margin: 16px auto 0;
  padding: 12px 14px 12px 18px;
  border: 1px solid rgba(16, 35, 43, 0.12);
  border-radius: 999px;
  background: rgba(251, 250, 244, 0.82);
  box-shadow: 0 18px 50px rgba(17, 42, 51, 0.1);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: 172px;
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-family: var(--display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav a {
  border-radius: 999px;
  padding: 0.72rem 0.9rem;
  color: rgba(16, 35, 43, 0.76);
  text-decoration: none;
  transition: background 180ms ease, color 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: rgba(17, 42, 51, 0.08);
  color: var(--ink);
  outline: none;
}

.nav-toggle {
  display: none;
  border: 1px solid rgba(16, 35, 43, 0.16);
  border-radius: 999px;
  background: var(--oxide);
  color: var(--cream);
  cursor: pointer;
  font-family: var(--display);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 0.78rem 0.95rem;
  text-transform: uppercase;
}

.section {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.82fr);
  gap: clamp(2rem, 5vw, 5.5rem);
  align-items: center;
  padding: clamp(5rem, 10vw, 9rem) 0 clamp(3rem, 7vw, 6rem);
}

.eyebrow {
  font-family: var(--display);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--copper);
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--ink);
  font-family: var(--display);
  line-height: 0.98;
}

h1 {
  margin-top: 1rem;
  max-width: 820px;
  font-size: clamp(3.4rem, 8.4vw, 7.9rem);
  letter-spacing: -0.075em;
}

h2 {
  font-size: clamp(2.2rem, 5vw, 4.8rem);
  letter-spacing: -0.06em;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  letter-spacing: -0.035em;
}

.hero-dek {
  max-width: 720px;
  margin-top: 1.35rem;
  color: var(--muted);
  font-size: clamp(1.08rem, 1.55vw, 1.36rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  border-radius: 999px;
  padding: 0.85rem 1.25rem;
  font-family: var(--display);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.button-primary {
  background: var(--oxide);
  color: var(--cream);
  box-shadow: 0 16px 36px rgba(17, 42, 51, 0.18);
}

.button-secondary {
  border: 1px solid rgba(16, 35, 43, 0.22);
  color: var(--oxide);
}

.hero-panel {
  position: relative;
  min-height: 560px;
  overflow: hidden;
  border: 1px solid rgba(16, 35, 43, 0.14);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(255, 248, 232, 0.86), rgba(185, 214, 210, 0.34)),
    repeating-linear-gradient(90deg, rgba(16, 35, 43, 0.05) 0 1px, transparent 1px 28px);
  box-shadow: var(--shadow);
}

.hero-panel::before {
  position: absolute;
  inset: 24px;
  border: 1px solid rgba(17, 42, 51, 0.1);
  border-radius: 24px;
  content: "";
}

.wafer-grid {
  position: absolute;
  inset: 52px 38px 150px;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: repeat(10, 1fr);
  gap: 8px;
}

.die,
.trace,
.substrate {
  position: relative;
  border: 1px solid rgba(16, 35, 43, 0.16);
  box-shadow: inset 0 0 0 1px rgba(255, 248, 232, 0.42);
}

.die-large {
  grid-column: 2 / 8;
  grid-row: 2 / 8;
  border-radius: 18px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px 18px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.16) 1px, transparent 1px 18px),
    var(--oxide);
}

.die-hbm {
  border-radius: 14px;
  background:
    repeating-linear-gradient(0deg, rgba(255, 248, 232, 0.2) 0 7px, transparent 7px 15px),
    var(--copper);
}

.die-one {
  grid-column: 9 / 12;
  grid-row: 2 / 5;
}

.die-two {
  grid-column: 9 / 12;
  grid-row: 6 / 9;
}

.trace {
  background: rgba(185, 214, 210, 0.8);
  border-radius: 999px;
}

.trace-a {
  grid-column: 7 / 10;
  grid-row: 4 / 5;
}

.trace-b {
  grid-column: 7 / 10;
  grid-row: 6 / 7;
}

.trace-c {
  grid-column: 4 / 11;
  grid-row: 9 / 10;
}

.substrate {
  grid-column: 1 / 13;
  grid-row: 10 / 11;
  border-radius: 999px;
  background: rgba(16, 35, 43, 0.12);
}

.panel-stats {
  position: absolute;
  left: 28px;
  right: 28px;
  bottom: 28px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 0;
}

.panel-stats div {
  border: 1px solid rgba(16, 35, 43, 0.12);
  border-radius: 18px;
  background: rgba(255, 248, 232, 0.64);
  padding: 1rem;
}

.panel-stats dt {
  color: var(--muted);
  font-family: var(--display);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.panel-stats dd {
  margin: 0.15rem 0 0;
  font-family: var(--display);
  font-size: 0.95rem;
  font-weight: 800;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

.signal-card,
.process-card,
.application-card,
.ecosystem-grid article,
.faq-item,
.sources-card {
  border: 1px solid rgba(16, 35, 43, 0.13);
  background: rgba(251, 250, 244, 0.72);
  box-shadow: 0 18px 50px rgba(17, 42, 51, 0.08);
}

.signal-card {
  border-radius: 24px;
  padding: 1.25rem;
}

.signal-card span,
.card-index {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(185, 214, 210, 0.5);
  color: var(--oxide);
  font-family: var(--display);
  font-size: 0.75rem;
  font-weight: 900;
}

.signal-card strong {
  display: block;
  margin-top: 1.25rem;
  font-family: var(--display);
  font-size: 1.06rem;
}

.signal-card p {
  margin-top: 0.5rem;
  color: var(--muted);
}

.split,
.ecosystem {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 5rem);
  padding: clamp(3rem, 7vw, 6rem) 0;
  border-top: 1px solid var(--line);
}

.section-body {
  display: grid;
  gap: 1rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.35vw, 1.2rem);
}

.process,
.applications,
.faq,
.constraints {
  padding: clamp(3rem, 7vw, 6rem) 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 840px;
}

.section-heading h2 {
  margin-top: 0.8rem;
}

.section-heading p:not(.eyebrow) {
  margin-top: 1rem;
  color: var(--muted);
  font-size: clamp(1.02rem, 1.35vw, 1.18rem);
}

.process-grid,
.application-grid,
.faq-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.process-card,
.application-card {
  min-height: 250px;
  border-radius: 28px;
  padding: 1.25rem;
}

.process-card h3,
.application-card h3 {
  margin-top: 3rem;
}

.process-card p,
.application-card p {
  margin-top: 0.75rem;
  color: var(--muted);
}

.anatomy {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  padding: clamp(3rem, 7vw, 6rem) 0;
  border-top: 1px solid var(--line);
}

.anatomy-visual {
  display: grid;
  gap: 0.7rem;
  border: 1px solid rgba(16, 35, 43, 0.14);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 248, 232, 0.76), rgba(185, 214, 210, 0.34));
  padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: var(--shadow);
}

.layer {
  display: flex;
  align-items: center;
  min-height: 70px;
  border: 1px solid rgba(16, 35, 43, 0.14);
  border-radius: 18px;
  padding: 0 1rem;
  font-family: var(--display);
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.layer-memory {
  width: 42%;
  margin-left: auto;
  background: rgba(185, 214, 210, 0.84);
}

.layer-logic {
  width: 68%;
  background: var(--oxide);
  color: var(--cream);
}

.layer-interposer {
  width: 88%;
  margin-inline: auto;
  background: rgba(185, 214, 210, 0.46);
}

.layer-substrate {
  width: 100%;
  background: rgba(185, 120, 61, 0.22);
}

.anatomy-copy h2 {
  margin-top: 0.8rem;
}

.anatomy-copy p {
  margin-top: 1rem;
  color: var(--muted);
}

.check-list {
  display: grid;
  gap: 0.65rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--muted);
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 0.62rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--copper);
  content: "";
}

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

.ecosystem-grid article {
  border-radius: 24px;
  padding: 1.2rem;
}

.ecosystem-grid p {
  margin-top: 0.6rem;
  color: var(--muted);
}

.constraint-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.constraint-list div {
  border-top: 2px solid var(--oxide);
  padding-top: 1rem;
}

.constraint-list strong {
  font-family: var(--display);
  font-size: 1.05rem;
}

.constraint-list p {
  margin-top: 0.5rem;
  color: var(--muted);
}

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

.faq-item {
  border-radius: 22px;
  padding: 1.1rem 1.2rem;
}

.faq-item summary {
  cursor: pointer;
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.faq-item p {
  margin-top: 0.8rem;
  color: var(--muted);
}

.sources {
  padding: clamp(3rem, 7vw, 6rem) 0;
}

.sources-card {
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 4vw, 3rem);
}

.sources-card h2 {
  margin-top: 0.7rem;
}

.sources-card p:not(.eyebrow) {
  max-width: 820px;
  margin-top: 1rem;
  color: var(--muted);
}

.source-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.source-links a {
  border: 1px solid rgba(16, 35, 43, 0.16);
  border-radius: 999px;
  padding: 0.72rem 0.9rem;
  color: var(--oxide);
  font-family: var(--display);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 1.4rem 0 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer img {
  width: 42px;
  height: 42px;
}

.site-footer p {
  flex: 1;
}

.site-footer a {
  font-family: var(--display);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms ease, transform 600ms ease;
}

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }

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

@media (max-width: 920px) {
  .site-header {
    align-items: flex-start;
    border-radius: 28px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    left: 12px;
    right: 12px;
    top: calc(100% + 8px);
    display: none;
    flex-direction: column;
    align-items: stretch;
    border: 1px solid rgba(16, 35, 43, 0.12);
    border-radius: 24px;
    background: rgba(251, 250, 244, 0.96);
    padding: 0.55rem;
    box-shadow: var(--shadow);
  }

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

  .hero,
  .split,
  .anatomy,
  .ecosystem {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 4rem;
  }

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

  .signal-strip,
  .process-grid,
  .application-grid,
  .constraint-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .section,
  .site-header,
  .site-footer {
    width: min(100% - 22px, var(--max));
  }

  .brand {
    width: 140px;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 4.7rem);
  }

  .hero-actions,
  .site-footer,
  .source-links {
    align-items: stretch;
    flex-direction: column;
  }

  .button,
  .source-links a {
    width: 100%;
  }

  .hero-panel {
    min-height: 420px;
  }

  .wafer-grid {
    inset: 44px 24px 155px;
  }

  .panel-stats {
    grid-template-columns: 1fr;
  }

  .panel-stats div {
    padding: 0.75rem;
  }

  .signal-strip,
  .process-grid,
  .application-grid,
  .ecosystem-grid,
  .constraint-list,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .process-card,
  .application-card {
    min-height: 210px;
  }
}