:root {
  color-scheme: dark;
  --page: #09130e;
  --surface: #102219;
  --ink: #f2f7ed;
  --muted: #b2c2b5;
  --accent: #b6f28b;
  --line: #304638;
  --radius: 1.5rem;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { scroll-padding-top: 2rem; }

body {
  margin: 0;
  color: var(--ink);
  background: radial-gradient(ellipse at 85% 12%, #183925 0, transparent 38rem), var(--page);
  font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

::selection { color: var(--page); background: var(--accent); }
a { color: inherit; text-underline-offset: .25em; }
a:hover { color: var(--accent); }
a, button, [tabindex] { -webkit-tap-highlight-color: #b6f28b40; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 6px; border-radius: .2rem; }
img { display: block; max-width: 100%; height: auto; }
p { margin: 0 0 1rem; }
h1, h2, h3 { margin: 0; text-wrap: balance; }
h1, h2 { font-weight: 650; letter-spacing: -.055em; line-height: 1.05; }
h3 { font-size: 1.35rem; font-weight: 650; letter-spacing: -.035em; line-height: 1.25; }

.page-width { width: min(1240px, calc(100% - 6rem)); margin-inline: auto; }
.skip-link {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 2;
  padding: .8rem 1.2rem;
  color: var(--page);
  background: var(--accent);
  border-radius: .4rem;
  transform: translateY(-200%);
}
.skip-link:focus { transform: translateY(0); color: var(--page); }

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  padding-block: 1.75rem;
  border-bottom: 1px solid var(--line);
}
.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: .15rem;
  width: fit-content;
  color: var(--ink);
  font-size: 1.65rem;
  font-weight: 750;
  letter-spacing: -.065em;
  line-height: 1.4;
  text-decoration: none;
}
.brand-dot { width: .25em; height: .25em; border-radius: 50%; background: var(--accent); }
nav { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem 2rem; }
nav a { display: inline-flex; align-items: center; min-height: 44px; font-size: .9rem; text-decoration: none; }
nav a:hover { text-decoration: underline; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  align-items: center;
  gap: clamp(1.5rem, 4vw, 4rem);
  padding-block: clamp(4rem, 7vw, 7rem) clamp(5rem, 8vw, 8rem);
}
.hero-copy { position: relative; }
.eyebrow {
  margin: 0 0 1.35rem;
  color: var(--accent);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
}
h1 { font-size: clamp(3rem, 5.1vw, 4.8rem); }
h1 span { color: var(--accent); }
.lede { max-width: 36rem; margin-block: 1.75rem 2rem; color: var(--muted); font-size: 1.1rem; line-height: 1.75; }
.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  min-height: 54px;
  padding: .85rem 1.4rem;
  border: 1px solid var(--accent);
  border-radius: .6rem;
  color: var(--page);
  background: var(--accent);
  font-size: .95rem;
  font-weight: 700;
  text-decoration: none;
}
.button:hover { color: var(--page); background: #d0ffaf; border-color: #d0ffaf; }
.button span { font-size: 1.3rem; line-height: 1; }
.availability { margin: 1rem 0 0; color: var(--muted); font-size: .78rem; }
.hero-art { min-width: 0; }
.hero-art img { width: 100%; height: auto; border-radius: var(--radius); }

.section { padding-block: 5.5rem; }
.section-heading { max-width: 42rem; }
.section-heading h2 { font-size: clamp(2.35rem, 4vw, 3.6rem); }
.section-heading > p:not(.eyebrow) { margin-top: 1.5rem; color: var(--muted); font-size: 1.05rem; }
.features { border-top: 1px solid var(--line); }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: 3rem; }
.feature { padding: clamp(1.5rem, 3vw, 2.5rem); border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.feature-index { display: block; margin-bottom: 2rem; color: var(--accent); font-size: .68rem; font-weight: 650; letter-spacing: .12em; }
.feature p { max-width: 29rem; margin: 1rem 0 0; color: var(--muted); }

.walkthrough {
  margin-bottom: 5.5rem;
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid #405b40;
  border-radius: var(--radius);
  background: #172d1c;
}
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; margin: 3rem 0 0; padding: 0; list-style: none; }
.steps li { padding-top: 1.25rem; border-top: 1px solid #54724e; }
.step-number { display: block; margin-bottom: 1.75rem; color: var(--accent); font-size: .9rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.steps p { margin: 1rem 0 0; color: #c0ceba; }
.walkthrough-close { margin: 3.5rem 0 0; padding-top: 2.5rem; border-top: 1px solid #405b40; font-size: clamp(1.5rem, 3vw, 2.35rem); font-weight: 600; letter-spacing: -.04em; line-height: 1.3; }
.walkthrough-close span { color: var(--accent); }

.site-footer { display: flex; justify-content: space-between; align-items: center; gap: 2rem; padding-block: 2rem 3rem; border-top: 1px solid var(--line); }
.footer-brand p { margin: .4rem 0 0; color: var(--muted); font-size: .8rem; }
.site-footer nav { gap: .5rem 1.5rem; }
.site-footer nav a { color: var(--muted); font-size: .8rem; }
.site-footer nav a:hover { color: var(--accent); }

.technical-main { padding-block: 4.5rem; }
.technical-intro { max-width: 48rem; margin-bottom: 4rem; }
.technical-intro h1 { font-size: clamp(2.8rem, 6vw, 4.5rem); }
.technical-intro .lede { max-width: none; }
.technical-section { padding-block: 3rem; border-top: 1px solid var(--line); }
.technical-section .section-heading { max-width: 48rem; }
.technical-section h2 { font-size: clamp(2rem, 4vw, 3rem); }
.capture-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); align-items: start; gap: 3rem; margin-top: 2rem; }
.raw-capture { margin: 0; }
.raw-capture > a { display: block; }
.raw-capture img { width: 100%; border: 1px solid var(--line); border-radius: .75rem; }
figcaption { margin-top: 1rem; color: var(--muted); font-size: .85rem; }
.build-meta { margin: 0 0 1.5rem; }
.build-meta div { padding-block: .85rem; border-bottom: 1px solid var(--line); }
.build-meta div:first-child { padding-top: 0; }
dt { color: var(--muted); font-size: .75rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
dd { margin: .3rem 0 0; overflow-wrap: anywhere; }
code { color: var(--accent); font-size: .9em; }
.text-link { display: inline-block; padding-block: .6rem; color: var(--accent); font-weight: 600; }
.resource-links { display: flex; flex-wrap: wrap; gap: .5rem 2rem; margin: 1rem 0 0; padding: 0; list-style: none; }
.evidence-note { margin-top: 2rem; padding: 2rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.evidence-note h2 { font-size: 1.35rem; letter-spacing: -.025em; line-height: 1.3; }
.evidence-note p { max-width: 52rem; margin: 1rem 0 0; color: var(--muted); }

@media (max-width: 960px) {
  .page-width { width: calc(100% - 3rem); }
  .hero { gap: 1.5rem; }
  h1 { font-size: clamp(2.7rem, 5.5vw, 4rem); }
  .lede { font-size: 1rem; }
  .steps { gap: 1.5rem; }
  .steps h3 { font-size: 1.2rem; }
  .site-footer { align-items: flex-start; }
  .site-footer nav { justify-content: flex-end; }
}

@media (max-width: 700px) {
  .page-width { width: calc(100% - 2.5rem); }
  .site-header { gap: 1rem; padding-block: 1.1rem; }
  .wordmark { font-size: 1.45rem; }
  nav { gap: .35rem 1rem; }
  nav a { font-size: .78rem; }
  .hero { grid-template-columns: minmax(0, 1fr); gap: 2.75rem; padding-block: 3.5rem; }
  .hero-copy { max-width: 33rem; }
  h1 { max-width: 13ch; font-size: clamp(2.7rem, 9.7vw, 4.2rem); }
  .lede { margin-block: 1.5rem; }
  .hero-art { width: 100%; max-width: 34rem; justify-self: center; }
  .section { padding-block: 3.5rem; }
  .section-heading h2 { font-size: clamp(2.15rem, 7.5vw, 3rem); }
  .feature-grid { grid-template-columns: minmax(0, 1fr); margin-top: 2rem; }
  .feature-index { margin-bottom: 1.5rem; }
  .walkthrough { margin-bottom: 3.5rem; padding: 2rem 1.5rem; }
  .steps { grid-template-columns: minmax(0, 1fr); gap: 2rem; margin-top: 2rem; }
  .step-number { margin-bottom: 1rem; }
  .steps h3 { font-size: 1.35rem; }
  .walkthrough-close { margin-top: 2.5rem; padding-top: 2rem; }
  .site-footer { flex-direction: column; gap: 1.25rem; padding-block: 1.75rem 2rem; }
  .site-footer nav { justify-content: flex-start; gap: .4rem 1.25rem; }
  .technical-main { padding-block: 3rem; }
  .technical-intro { margin-bottom: 2.5rem; }
  .technical-section { padding-block: 2.5rem; }
  .capture-layout { grid-template-columns: minmax(0, 1fr); gap: 2rem; }
  .evidence-note { padding: 1.5rem; }
}

@media (max-width: 360px) {
  .site-header { align-items: flex-start; flex-direction: column; gap: .25rem; }
  .button { width: 100%; gap: 1rem; }
}