:root {
  --ink: #171717;
  --ink-soft: #45433f;
  --paper: #f5f1e8;
  --paper-bright: #fffdf8;
  --accent: #a16207;
  --accent-soft: #f2dfb6;
  --signal: #0d5c63;
  --line: #d8d0c2;
  --code: #111816;
  --code-ink: #e9f3ee;
  --mono: "Space Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --serif: "Source Serif 4", Georgia, serif;
  --content: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, transparent 31px, rgba(23, 23, 23, 0.035) 32px, transparent 33px),
    var(--paper);
  background-size: 64px 64px;
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--signal);
  text-underline-offset: 0.18em;
}

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

a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  color: white;
  background: var(--ink);
  font-family: var(--mono);
  font-size: 0.75rem;
  transform: translateY(-160%);
}

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

.site-header,
.site-footer {
  width: min(calc(100% - 40px), var(--content));
  margin-inline: auto;
  font-family: var(--mono);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 88px;
  border-bottom: 1px solid var(--line);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.wordmark-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper-bright);
}

.header-link {
  color: var(--ink);
  font-weight: 700;
  text-decoration-thickness: 1px;
}

.article-hero,
.home-main,
.closing-card {
  width: min(calc(100% - 40px), var(--content));
  margin-inline: auto;
}

.article-hero {
  padding: clamp(72px, 11vw, 150px) 0 clamp(64px, 8vw, 108px);
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 24px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow span {
  display: inline-grid;
  min-width: 28px;
  min-height: 28px;
  margin-left: 8px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
}

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

.article-hero h1,
.home-hero h1 {
  max-width: 1050px;
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(2.7rem, 7.4vw, 7.2rem);
  line-height: 0.98;
  letter-spacing: -0.065em;
}

.dek,
.home-hero > p:last-child {
  max-width: 790px;
  margin: 40px 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.18rem, 2.1vw, 1.65rem);
  line-height: 1.45;
}

.article-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 760px;
  margin-top: 56px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.article-meta div {
  padding: 18px 20px 18px 0;
}

.article-meta span,
.article-meta strong {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
}

.article-meta span {
  margin-bottom: 4px;
  color: var(--ink-soft);
  text-transform: uppercase;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.tag-list li {
  padding: 5px 10px;
  border: 1px solid var(--line);
  background: var(--paper-bright);
  font-family: var(--mono);
  font-size: 0.68rem;
}

.article-shell {
  display: grid;
  grid-template-columns: 220px minmax(0, 760px);
  gap: clamp(40px, 8vw, 110px);
  width: min(calc(100% - 40px), 1100px);
  margin: 0 auto;
  padding: 96px 0 120px;
}

.section-rail {
  align-self: start;
  position: sticky;
  top: 32px;
  font-family: var(--mono);
  font-size: 0.7rem;
  line-height: 1.5;
}

.section-rail > p {
  margin: 0 0 16px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-rail nav {
  display: grid;
  border-top: 1px solid var(--line);
}

.section-rail a {
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  text-decoration: none;
}

.section-rail a:hover {
  color: var(--accent);
}

.prose {
  min-width: 0;
}

.prose > p:first-child {
  margin-top: 0;
  color: var(--ink);
  font-size: 1.28rem;
  line-height: 1.6;
}

.prose h2 {
  margin: 88px 0 26px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: clamp(1.55rem, 3vw, 2.35rem);
  line-height: 1.15;
  letter-spacing: -0.04em;
}

.prose h3 {
  margin: 48px 0 18px;
  font-family: var(--mono);
  font-size: 1.18rem;
}

.prose p,
.prose li {
  color: #282621;
}

.prose li + li {
  margin-top: 8px;
}

.prose blockquote {
  margin: 42px 0;
  padding: 24px 28px;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  font-size: 1.05rem;
}

.prose code {
  padding: 0.12em 0.3em;
  border-radius: 2px;
  background: #e7e0d5;
  font-family: var(--mono);
  font-size: 0.82em;
}

.prose pre {
  max-width: 100%;
  margin: 34px 0;
  padding: 26px;
  overflow-x: auto;
  border: 1px solid #2d3b36;
  border-radius: 3px;
  background: var(--code);
  box-shadow: 9px 9px 0 rgba(13, 92, 99, 0.18);
  color: var(--code-ink);
  font-size: 0.78rem;
  line-height: 1.65;
  tab-size: 2;
}

.prose pre code {
  padding: 0;
  background: transparent;
  color: inherit;
  font-size: inherit;
}

.prose strong {
  font-weight: 600;
}

.prose hr {
  margin: 72px 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.closing-card {
  margin-bottom: 110px;
  padding: clamp(34px, 6vw, 76px);
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper-bright);
}

.closing-card h2 {
  max-width: 780px;
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(2rem, 4.5vw, 4.4rem);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

.closing-card > p:not(.eyebrow) {
  max-width: 680px;
  color: #d6d2c9;
}

.primary-link {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  margin-top: 16px;
  padding: 12px 18px;
  border: 1px solid currentColor;
  color: inherit;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-color 180ms ease, color 180ms ease;
}

.primary-link:hover {
  background: var(--paper-bright);
  color: var(--ink);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 30px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.66rem;
  text-transform: uppercase;
}

.home-main {
  padding: clamp(72px, 11vw, 150px) 0 120px;
}

.home-hero {
  max-width: 1050px;
}

.featured-note {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: clamp(24px, 5vw, 68px);
  margin-top: 110px;
  padding: clamp(28px, 6vw, 70px);
  border: 1px solid var(--ink);
  background: var(--paper-bright);
  box-shadow: 14px 14px 0 var(--accent-soft);
}

.featured-note h2 {
  max-width: 820px;
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(1.75rem, 4vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.featured-note p:not(.eyebrow) {
  max-width: 720px;
  color: var(--ink-soft);
}

.note-index {
  font-family: var(--mono);
  font-size: clamp(3.6rem, 7vw, 7rem);
  font-weight: 700;
  line-height: 0.82;
  color: var(--accent);
}

@media (max-width: 820px) {
  body {
    font-size: 17px;
  }

  .article-shell {
    display: block;
    padding-top: 64px;
  }

  .section-rail {
    position: static;
    margin-bottom: 60px;
  }

  .section-rail nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-rail a:nth-child(odd) {
    padding-right: 16px;
  }

  .article-meta {
    grid-template-columns: 1fr;
  }

  .article-meta div + div {
    border-top: 1px solid var(--line);
  }

  .featured-note {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .site-header,
  .site-footer,
  .article-hero,
  .home-main,
  .closing-card,
  .article-shell {
    width: min(calc(100% - 28px), var(--content));
  }

  .site-header {
    min-height: 72px;
  }

  .wordmark span:last-child {
    max-width: 170px;
    line-height: 1.35;
  }

  .header-link {
    display: none;
  }

  .article-hero h1,
  .home-hero h1 {
    font-size: clamp(2.4rem, 13.5vw, 4.2rem);
  }

  .section-rail nav {
    grid-template-columns: 1fr;
  }

  .prose pre {
    margin-inline: -14px;
    padding: 20px 16px;
    border-radius: 0;
    box-shadow: none;
    font-size: 0.69rem;
  }

  .closing-card {
    margin-bottom: 70px;
  }

  .site-footer {
    display: grid;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .site-header,
  .section-rail,
  .closing-card,
  .site-footer {
    display: none;
  }

  body {
    background: white;
  }

  .article-shell {
    display: block;
    width: 100%;
    padding: 30px 0;
  }
}