:root {
  color-scheme: light;
  --paper: #f4f0e8;
  --ink: #151a20;
  --muted: #676861;
  --accent: #526d78;
  --line: #c9c5bc;
  --max-width: 70rem;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  scroll-behavior: auto;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 5px;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-180%);
}

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

.site-header,
main,
footer {
  width: min(calc(100% - 3rem), var(--max-width));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 6.5rem;
  border-bottom: 1px solid var(--line);
}

.social-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem 1.5rem;
}

.social-nav a {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
}

.social-nav a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(14rem, 21rem);
  min-height: calc(100svh - 6.5rem);
  align-content: center;
  gap: 2.25rem 5rem;
  padding-block: 6rem;
}

.section-number,
.item-meta,
.feature-kicker,
.link-source {
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3,
.feature-title {
  text-wrap: balance;
}

h1 {
  margin-bottom: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3.6rem, 7vw, 6.4rem);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 0.9;
}

h1 span {
  display: block;
}

.hero-note {
  align-self: end;
  max-width: 28ch;
  margin-bottom: 0.45rem;
  color: var(--muted);
  font-size: clamp(0.95rem, 1.35vw, 1.1rem);
}

.section {
  display: grid;
  grid-template-columns: minmax(11rem, 0.7fr) minmax(0, 2fr);
  gap: 3rem 6rem;
  padding-block: 6rem;
  border-top: 1px solid var(--line);
}

.section-heading {
  align-self: start;
  position: sticky;
  top: 2rem;
}

.section-number {
  margin-bottom: 0.75rem;
}

h2 {
  margin-bottom: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.9rem, 3.4vw, 3.15rem);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 1;
}

.timeline,
.link-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: 1.5rem;
  padding: 0 0 2.5rem;
}

.timeline li + li {
  padding-top: 2.5rem;
  border-top: 1px solid var(--line);
}

.timeline li:last-child {
  padding-bottom: 0;
}

.item-meta {
  margin: 0.35rem 0 0;
}

h3 {
  margin-bottom: 0.55rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.45rem, 2.5vw, 2.15rem);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.timeline li p:last-child {
  max-width: 58ch;
  margin-bottom: 0;
  color: var(--muted);
}

.feature-card {
  display: flex;
  min-height: 24rem;
  flex-direction: column;
  justify-content: space-between;
  gap: 2rem;
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid var(--ink);
  text-decoration: none;
}

.feature-card:hover {
  background: var(--ink);
  color: var(--paper);
}

.feature-card:hover .feature-kicker {
  color: #9bc5d8;
}

.feature-title {
  max-width: 30ch;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.65rem, 2.8vw, 2.45rem);
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.feature-action {
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.link-list {
  border-top: 1px solid var(--ink);
}

.link-list li {
  border-bottom: 1px solid var(--line);
}

.link-list a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 2rem;
  padding-block: 1.55rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.3rem, 2.4vw, 2rem);
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-decoration: none;
}

.link-list a:hover {
  color: var(--accent);
}

.link-source {
  font-family:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  text-align: right;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 3rem;
  border-top: 1px solid var(--ink);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

footer p {
  margin-bottom: 0;
}

footer a {
  text-decoration: none;
}

footer a:hover {
  color: var(--accent);
  text-decoration: underline;
}

@media (max-width: 48rem) {
  .site-header,
  main,
  footer {
    width: min(calc(100% - 2rem), var(--max-width));
  }

  .site-header {
    min-height: 5.5rem;
  }

  .social-nav {
    gap: 0.35rem 0.8rem;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: calc(100svh - 7rem);
    gap: 2rem;
    padding-block: 5rem;
  }

  h1 {
    font-size: clamp(3.2rem, 13vw, 4.8rem);
    line-height: 0.92;
  }

  .hero-note {
    align-self: auto;
    margin-top: 1rem;
  }

  .section {
    grid-template-columns: 1fr;
    gap: 3rem;
    padding-block: 4.5rem;
  }

  .section-heading {
    position: static;
  }

  .timeline li {
    grid-template-columns: 4rem minmax(0, 1fr);
    gap: 1rem;
  }

  .feature-card {
    min-height: 25rem;
    padding: 1.5rem;
  }

  .link-list a {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .link-source {
    text-align: left;
  }
}

@media (max-width: 30rem) {
  .site-header {
    justify-content: center;
    padding-block: 1.25rem;
  }

  .social-nav {
    justify-content: flex-start;
  }

  h1 {
    font-size: clamp(2.9rem, 12vw, 4.2rem);
    letter-spacing: -0.065em;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .item-meta {
    margin: 0;
  }

  footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}