:root {
  --ink: #101318;
  --ink-soft: #545c6b;
  --ink-faint: #8b93a1;
  --paper: #efeff2;
  --panel: #ffffff;
  --rule: #dcdde3;
  --tint: #3c4bd8;
  --violet: #6b4be8;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8eaee;
    --ink-soft: #9ba3b2;
    --ink-faint: #6b7280;
    --paper: #0b0d10;
    --panel: #14171c;
    --rule: #262b33;
    --tint: #8c9bff;
    --violet: #b49bff;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--tint);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

:focus-visible {
  outline: 2px solid var(--tint);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  width: min(100% - 2.5rem, 66rem);
  margin: 0 auto;
}

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.6rem 0 0;
}

.mark {
  color: var(--ink);
  font-size: 15px;
  font-weight: 650;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.bar-link,
.eyebrow,
.revision,
.route-label,
.colophon {
  font-family: var(--mono);
}

.bar-link {
  color: var(--ink-soft);
  font-size: 12.5px;
  text-decoration-color: var(--rule);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(2rem, 7vw, 6rem);
  padding: clamp(4.5rem, 13vh, 8rem) 0 clamp(3.5rem, 9vh, 6rem);
  align-items: end;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--ink-faint);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  max-width: 12ch;
  margin: 0;
  font-size: clamp(2.5rem, 6.7vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 0.98;
  text-wrap: balance;
}

.hero-copy {
  max-width: 39rem;
  margin: 0;
  color: var(--ink-soft);
  font-size: clamp(1.08rem, 2.1vw, 1.3rem);
  line-height: 1.52;
}

.revision {
  margin: 1.5rem 0 0;
  color: var(--ink-faint);
  font-size: 11.5px;
}

.route {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0 0 clamp(4rem, 9vh, 6.5rem);
  border: 1px solid var(--rule);
  border-radius: 22px;
  overflow: hidden;
  background: var(--panel);
  box-shadow: 0 18px 45px -40px rgba(10, 12, 18, 0.65);
}

.route-step {
  position: relative;
  min-height: 12rem;
  padding: 1.35rem;
  border-right: 1px solid var(--rule);
}

.route-step:last-child { border-right: 0; }

.route-label {
  margin: 0 0 2.5rem;
  color: var(--violet);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.route-step h2 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  letter-spacing: -0.015em;
}

.route-step p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.section {
  display: grid;
  grid-template-columns: minmax(11rem, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(1.5rem, 6vw, 5rem);
  padding: clamp(3rem, 7vh, 4.75rem) 0;
  border-top: 1px solid var(--rule);
}

.section h2 {
  max-width: 14ch;
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 2rem);
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.14;
  text-wrap: balance;
}

.prose { max-width: 43rem; }

.prose > :first-child { margin-top: 0; }
.prose > :last-child { margin-bottom: 0; }

.prose h3 {
  margin: 2rem 0 0.5rem;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.prose p,
.prose li { color: var(--ink-soft); }

.prose ul { padding-left: 1.2rem; }
.prose li + li { margin-top: 0.55rem; }

.plain-list {
  list-style: none;
  padding: 0;
}

.plain-list li {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--rule);
}

.plain-list li:first-child { border-top: 1px solid var(--rule); }

.notice {
  margin: 1.75rem 0;
  padding: 1.1rem 1.2rem;
  border-left: 3px solid var(--violet);
  background: color-mix(in srgb, var(--panel) 82%, var(--violet) 18%);
  color: var(--ink);
}

.colophon {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.4rem;
  padding: 1.5rem 0 3rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-faint);
  font-size: 12px;
}

@media (max-width: 760px) {
  .hero,
  .section { grid-template-columns: minmax(0, 1fr); }
  .hero { gap: 1.5rem; }
  .route { grid-template-columns: minmax(0, 1fr); }
  .route-step { min-height: 0; }
  .route-step:not(:last-child) {
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }
  .route-label { margin-bottom: 1rem; }
}

@media (prefers-reduced-motion: no-preference) {
  .hero > * { opacity: 0; animation: arrive 0.55s ease-out forwards; }
  .hero > :last-child { animation-delay: 0.08s; }
  .route { opacity: 0; animation: arrive 0.65s ease-out 0.14s forwards; }
}

@keyframes arrive {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}