:root {
  color-scheme: light dark;
  --bg: #f5f4ef;
  --surface: #fffdf7;
  --surface-soft: #eeece4;
  --text: #202124;
  --muted: #686b70;
  --border: rgb(32 33 36 / 16%);
  --accent: #2f6f68;
  --accent-strong: #244f4a;
  --focus: #9a4b2e;
  --radius: 8px;
  --measure: 68ch;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151618;
    --surface: #1d1f22;
    --surface-soft: #24272b;
    --text: #ece8de;
    --muted: #b1aaa0;
    --border: rgb(236 232 222 / 17%);
    --accent: #75b8aa;
    --accent-strong: #a2d0c6;
    --focus: #d59a75;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  color: var(--text);
  font-family:
    ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.65;
  text-size-adjust: 100%;
}

body {
  min-block-size: 100vb;
  margin: 0;
  background: var(--bg);
}

a {
  color: inherit;
  text-decoration-color: color-mix(in srgb, var(--accent), transparent 52%);
  text-underline-offset: 0.18em;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 4px;
}

img {
  max-inline-size: 100%;
  block-size: auto;
}

.site-header,
.site-main,
.site-footer {
  inline-size: min(100% - 32px, 1120px);
  margin-inline: auto;
}

.site-header {
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
  min-block-size: 72px;
  padding-block: 16px;
}

.brand {
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: center;
  justify-content: flex-end;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--accent);
}

.site-main {
  padding-block: 40px 72px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(220px, 0.7fr);
  gap: 44px;
  align-items: end;
  min-block-size: min(520px, calc(100dvb - 112px));
  padding-block: 24px 48px;
}

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

h1 {
  max-inline-size: 16ch;
  margin-block-end: 24px;
  font-size: clamp(2.4rem, 7vw, 4.4rem);
  letter-spacing: 0;
  line-height: 1.05;
}

h2 {
  margin-block: 0 18px;
  font-size: clamp(1.7rem, 4vw, 2.7rem);
  letter-spacing: 0;
  line-height: 1.08;
}

h3 {
  font-size: 1.18rem;
  letter-spacing: 0;
  line-height: 1.3;
}

.hero-copy,
.listing-header > p,
.article-header > p,
.prose {
  inline-size: 100%;
  min-inline-size: 0;
  max-inline-size: min(100%, var(--measure));
}

.hero-copy p,
.listing-header > p,
.article-header > p {
  color: var(--muted);
  font-size: 1.05rem;
}

.automaton-card {
  display: grid;
  position: relative;
  overflow: hidden;
  align-self: stretch;
  min-block-size: 260px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface), transparent 32%);
}

.automaton-card canvas {
  display: block;
  inline-size: 100%;
  block-size: 100%;
  touch-action: pan-y;
}

.automaton-card .automaton-rule {
  position: absolute;
  inset-inline: 12px;
  inset-block-end: 10px;
  margin: 0;
  color: var(--muted);
  font-family:
    ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
}

.automaton-card:not(:defined)::before {
  display: grid;
  min-block-size: 260px;
  place-items: center;
  color: var(--muted);
  content: "cellular automaton";
  font-family:
    ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.8rem;
}

.section-block {
  margin-block-start: 24px;
}

.section-heading {
  display: flex;
  gap: 16px;
  align-items: baseline;
  justify-content: space-between;
  margin-block-end: 18px;
  border-block-start: 1px solid var(--border);
  padding-block-start: 22px;
}

.post-list {
  display: grid;
  gap: 14px;
}

.post-card {
  display: grid;
  gap: 12px;
  padding: 20px 0;
  border-block-start: 1px solid var(--border);
}

.post-card > a {
  display: grid;
  gap: 8px;
  color: var(--text);
  text-decoration: none;
}

.post-card h3 {
  margin: 0;
}

.post-card p {
  max-inline-size: 74ch;
  margin: 0;
  color: var(--muted);
}

.post-card-date,
.article-meta,
.taxonomy,
.site-footer {
  color: var(--muted);
  font-family:
    ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.84rem;
}

.taxonomy {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.taxonomy a {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3px 8px;
  background: color-mix(in srgb, var(--surface), transparent 18%);
  text-decoration: none;
}

.listing-header,
.article-header {
  margin-block-end: 32px;
  padding-block-end: 28px;
  border-block-end: 1px solid var(--border);
}

.listing-header h1 {
  max-inline-size: 16ch;
  font-size: clamp(2.4rem, 7vw, 4.4rem);
}

.article-header h1 {
  max-inline-size: 26ch;
  font-size: clamp(1.7rem, 4.5vw, 2.6rem);
  line-height: 1.3;
}

.article-shell {
  display: grid;
  justify-items: start;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-block-end: 14px;
}

.prose {
  font-size: 1.02rem;
}

.prose > * + * {
  margin-block-start: 1.08em;
}

.prose h2 {
  margin-block-start: 2.2em;
  font-size: 1.55rem;
}

.prose h3 {
  margin-block-start: 1.8em;
}

.prose code {
  border-radius: 5px;
  padding: 0.12em 0.35em;
  background: var(--surface-soft);
  font-size: 0.92em;
  overflow-wrap: anywhere;
}

.prose pre {
  max-inline-size: 100%;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  background: #0d1117;
  color: #c9d1d9;
  font-size: 0.88rem;
  line-height: 1.6;
}

.prose pre code {
  display: block;
  min-inline-size: max-content;
  padding: 0;
  background: none;
  font-size: inherit;
  overflow-wrap: normal;
}

.prose blockquote {
  margin-inline: 0;
  padding-inline-start: 18px;
  border-inline-start: 3px solid var(--accent);
  color: var(--muted);
}

.taxonomy-index {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.taxonomy-index a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-block-size: 58px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  background: var(--surface);
  text-decoration: none;
}

.standards-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-block-start: 42px;
  padding-block-start: 24px;
  border-block-start: 1px solid var(--border);
}

.standards-badges a {
  line-height: 0;
}

.site-footer {
  display: flex;
  gap: 12px 24px;
  align-items: baseline;
  justify-content: space-between;
  padding-block: 28px 48px;
  border-block-start: 1px solid var(--border);
}

.site-footer p {
  margin: 0;
}

.site-footer p:last-child {
  display: flex;
  gap: 14px;
}

@media (max-width: 780px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero {
    grid-template-columns: 1fr;
    min-block-size: auto;
    padding-block: 24px 48px;
  }

  .automaton-card,
  .automaton-card canvas,
  .automaton-card:not(:defined)::before {
    min-block-size: 190px;
    block-size: 190px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}