:root {
  --ink: #0b1c2c;
  --muted: #3d5566;
  --paper: #f4f8fc;
  --card: #ffffff;
  --line: #d5e3f0;
  --cage: #0d47a1;
  --bond: #0288d1;
  --gold: #c9a227;
  --teal: #0f766e;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Sans 3", "Source Sans Pro", sans-serif;
  font-size: 18px;
  line-height: 1.55;
}

.lattice {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.22;
  background-image:
    linear-gradient(30deg, #9ec5e8 1px, transparent 1px),
    linear-gradient(150deg, #9ec5e8 1px, transparent 1px),
    linear-gradient(90deg, #c5dcf0 1px, transparent 1px);
  background-size: 28px 48px, 28px 48px, 28px 48px;
}

body > * { position: relative; z-index: 1; }

a { color: var(--cage); }
a:hover { color: var(--bond); }

a:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10;
  padding: 0.55rem 0.8rem;
  background: var(--ink);
  color: #fff;
  font-weight: 700;
  transform: translateY(-200%);
}

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

.bar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1.5rem;
  max-width: 68rem;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 0;
}

.bar-brand {
  font-family: "Source Serif 4", "Source Serif Pro", serif;
  font-weight: 650;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.bar-nav {
  display: flex;
  gap: 1.25rem;
}

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

.bar-nav a:hover { color: var(--cage); }

.hero {
  max-width: 68rem;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: minmax(12rem, 18rem) 1fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-cage {
  width: 100%;
  height: auto;
  display: block;
}

.eyebrow {
  margin: 0 0 0.6rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

h1, h2, h3 {
  font-family: "Source Serif 4", "Source Serif Pro", serif;
  font-weight: 650;
  line-height: 1.2;
  margin: 0 0 0.6rem;
}

h1 { font-size: clamp(2rem, 4vw, 3.1rem); }
h2 { font-size: 1.7rem; }
h3 { font-size: 1.2rem; }

.lede {
  margin: 0 0 1.4rem;
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 38rem;
}

.actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin: 0; }

.btn {
  display: inline-block;
  padding: 0.55rem 1rem;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.btn:hover { border-color: var(--cage); color: var(--cage); }

.btn-primary {
  background: var(--cage);
  border-color: var(--cage);
  color: #fff;
}

.btn-primary:hover { background: var(--bond); border-color: var(--bond); color: #fff; }

.suite, .use, .science, .cite, .v2 {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0 1.5rem 3.2rem;
}

.then-now {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.25rem 0 1.75rem;
}

.then-now article {
  padding: 1.1rem 1.2rem;
  background: var(--card);
  border: 1px solid var(--line);
}

.then-now article:first-child { border-top: 4px solid var(--gold); }
.then-now article:last-child { border-top: 4px solid var(--cage); }

.then-now p { margin: 0; color: var(--muted); }

.split-engine {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1.2rem 1.3rem;
  background: var(--ink);
  color: #e8f4ff;
}

.split-engine a {
  color: #fff;
  font-family: "Source Serif 4", serif;
  font-size: 1.45rem;
  font-weight: 650;
  text-decoration: none;
}

.split-engine a:hover { color: var(--bond); }
.split-engine code { color: #9ec5e8; }

.split-kicker {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bond);
}

.split-arms {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-top: 0;
}

.split-arms a {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 1.1rem 1.15rem;
  background: var(--card);
  text-decoration: none;
  color: inherit;
}

.split-arms a:hover { background: #eef5fb; }
.split-arms strong {
  font-family: "Source Serif 4", serif;
  font-size: 1.2rem;
}
.split-arms span:last-child { color: var(--muted); font-size: 0.92rem; }

.credit {
  margin: 1.1rem 0 0;
  color: var(--muted);
  max-width: 48rem;
}

.bench {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0 0;
  font-size: 0.92rem;
  background: var(--card);
}

.bench caption {
  caption-side: bottom;
  text-align: left;
  padding: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.bench th, .bench td {
  padding: 0.45rem 0.7rem;
  border-bottom: 1px solid var(--line);
  text-align: right;
}

.bench th:first-child, .bench td:first-child { text-align: left; }
.bench thead th { font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }

.cards {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.cards a {
  display: block;
  height: 100%;
  padding: 1.1rem 1rem 1.2rem;
  background: var(--card);
  border: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
}

.cards a:hover { border-color: var(--cage); }

.cards img {
  display: block;
  width: 56px;
  height: auto;
  margin-bottom: 0.75rem;
}

.cards p { margin: 0; color: var(--muted); font-size: 0.95rem; }

code, pre {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.86em;
}

.snips {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}

.snips figure, .stills figure { margin: 0; }

.snips figcaption, .stills figcaption {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.snips pre {
  margin: 0;
  padding: 0.9rem 1rem;
  background: var(--ink);
  color: #e8f4ff;
  overflow-x: auto;
  font-size: 0.78rem;
  line-height: 1.45;
}

.two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin: 1rem 0 1.75rem;
}

.two article {
  padding: 1.1rem 1.2rem;
  background: var(--card);
  border-left: 4px solid var(--cage);
}

.two article:last-child { border-left-color: var(--teal); }

.two p { margin: 0; color: var(--muted); }

.stills {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.stills img {
  width: 100%;
  height: auto;
  display: block;
  background: #fff;
  border: 1px solid var(--line);
}

.walk {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0 1.5rem 3.2rem;
}

.walk .lede { margin-bottom: 1rem; }

.cast {
  background: var(--ink);
  border: 1px solid var(--line);
  padding: 0.5rem;
  overflow: auto;
}

.cite p { max-width: 46rem; color: var(--muted); }

.foot {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0 1.5rem 2.5rem;
  color: var(--muted);
  font-size: 0.92rem;
  border-top: 1px solid var(--line);
}

.foot p { margin: 1rem 0 0; }

.foot-antics {
  font-size: 0.88em;
  color: var(--muted);
}

@media (max-width: 860px) {
  .hero, .cards, .snips, .two, .stills, .then-now, .split-arms {
    grid-template-columns: 1fr;
  }
  .hero { padding-top: 1.5rem; }
  .hero-cage { max-width: 16rem; margin: 0 auto; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}