.hero {
  min-height: 100dvh;
  overflow: hidden;
  color: var(--text-on-dark);
  background:
    radial-gradient(circle at 15% 10%, color-mix(in srgb, var(--accent-cyan) 24%, transparent), transparent 34%),
    radial-gradient(circle at 88% 74%, color-mix(in srgb, var(--accent-coral) 12%, transparent), transparent 28%),
    linear-gradient(145deg, var(--surface-navy) 18%, var(--surface-navy-raised) 100%);
}

.site-nav,
.hero-grid,
.section,
.evidence-strip,
.site-footer {
  width: min(calc(100% - var(--space-8)), var(--content-width));
  margin-inline: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--space-20);
  gap: var(--space-6);
  border-bottom: 1px solid var(--border-dark);
}

.brand,
.nav-links a {
  text-decoration: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 720;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: var(--space-4);
  height: var(--space-4);
  background: var(--accent-cyan);
  border-radius: var(--space-1);
  box-shadow: var(--shadow-inset);
  transform: rotate(45deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  color: var(--text-on-dark-muted);
  font-size: 0.875rem;
  font-weight: 720;
}

.nav-links a {
  padding-block: var(--space-2);
  transition: color 160ms ease-out, transform 120ms ease-out;
}

.nav-links a:hover {
  color: var(--text-on-dark);
  transform: translateY(-2px);
}

.nav-links a:active {
  transform: translateY(0);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(22rem, 0.92fr);
  align-items: center;
  gap: var(--space-16);
  padding-block: var(--space-20) var(--space-24);
}

.hero-copy {
  max-width: 44rem;
}

.overline {
  margin-bottom: var(--space-4);
  color: var(--accent-cyan-strong);
  font-size: 0.75rem;
  font-weight: 720;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.hero .overline {
  color: var(--accent-cyan);
}

.hero h1 {
  margin-bottom: var(--space-6);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 760;
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.hero-lead {
  max-width: 40rem;
  margin-bottom: var(--space-4);
  color: var(--text-on-dark-muted);
  font-size: 1.125rem;
  line-height: 1.7;
}

.korean-summary {
  max-width: 40rem;
  margin-bottom: var(--space-8);
  color: var(--text-on-dark);
  word-break: keep-all;
}

.hero-actions,
.adoption-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--space-12);
  padding: var(--space-3) var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  font-weight: 720;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  transition: color 160ms ease-out, background-color 160ms ease-out, border-color 160ms ease-out, transform 120ms ease-out;
}

.action:hover {
  transform: translateY(-2px);
}

.action:active {
  transform: translateY(1px);
}

.action-primary {
  color: var(--surface-navy);
  background: var(--accent-cyan);
}

.action-primary:hover {
  background: var(--text-on-dark);
}

.action-outline {
  color: var(--text-on-dark);
  border-color: var(--border-dark);
  background: color-mix(in srgb, var(--surface-primary) 4%, transparent);
}

.action-outline:hover {
  border-color: var(--accent-cyan);
}

.action-dark {
  color: var(--text-on-dark);
  background: var(--surface-navy);
}

.action-dark:hover {
  background: var(--surface-navy-raised);
}

.scope-note {
  max-width: 38rem;
  margin: var(--space-5) 0 0;
  color: var(--text-on-dark-muted);
  font-size: 0.875rem;
}

.pipeline-figure {
  margin: 0;
  padding: var(--space-6);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-large);
  background: color-mix(in srgb, var(--surface-navy-raised) 58%, transparent);
  box-shadow: var(--shadow-raised), var(--shadow-inset);
  animation: pipeline-reveal 420ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.pipeline-figure figcaption {
  margin-bottom: var(--space-5);
  color: var(--text-on-dark-muted);
  font-size: 0.75rem;
  font-weight: 720;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.pipeline {
  display: grid;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.pipeline li {
  position: relative;
  display: grid;
  gap: var(--space-1);
  padding: var(--space-4);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-medium);
  background: var(--surface-navy-raised);
  box-shadow: var(--shadow-inset);
}

.pipeline li:not(:last-child)::after {
  position: absolute;
  bottom: calc(var(--space-4) * -1);
  left: var(--space-8);
  width: 2px;
  height: var(--space-4);
  background: var(--accent-cyan);
  content: "";
}

.pipeline strong {
  font-size: 1.125rem;
  line-height: 1.35;
}

.pipeline small {
  color: var(--text-on-dark-muted);
  font-size: 0.875rem;
}