:root {
  --bg: #f4efe6;
  --paper: #fcf8f0;
  --ink: #151310;
  --muted: #6d675f;
  --accent: #e2472f;
  --line: 1.6rem;
  --ch: 8px;
}

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

html {
  color-scheme: light;
}

body {
  margin: 0;
  font-family: "IBM Plex Mono", "SF Mono", Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--bg);
  background-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.08) 1px,
    transparent 1px
  );
  background-size: 100% var(--line);
}

main,
header,
footer {
  width: min(92vw, 118ch);
  margin: 0 auto;
}

header {
  padding: calc(var(--line) * 2) 0 calc(var(--line) * 1.25);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3ch;
  border-bottom: 1px solid var(--ink);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.brand a {
  font-weight: 700;
  text-decoration: none;
  color: inherit;
}

.brand span {
  color: var(--muted);
  font-size: 0.9rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5ch;
}

.nav a {
  text-decoration: none;
  color: var(--ink);
  padding: 0.15rem 0.35rem;
  border: 1px solid transparent;
}

.nav a:hover,
.nav a:focus {
  border-color: var(--ink);
  background: var(--paper);
}

main {
  padding: calc(var(--line) * 2) 0 calc(var(--line) * 2.5);
  display: flex;
  flex-direction: column;
  gap: calc(var(--line) * 2);
}

section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero {
  border: 1px solid var(--ink);
  background: var(--paper);
  padding: calc(var(--line) * 1.5);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.25ch;
  font-size: 0.75rem;
  color: var(--muted);
  margin: 0 0 0.75rem 0;
}

h1,
h2,
h3 {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.25rem);
}

h2 {
  font-size: 1.5rem;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 0.25rem;
}

h3 {
  font-size: 1.1rem;
}

p {
  margin: 0;
}

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

.lede {
  font-size: 1.1rem;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: calc(var(--ch) * 2);
  grid-template-columns: repeat(auto-fit, minmax(24ch, 1fr));
}

.panel {
  border: 1px solid var(--ink);
  padding: 1.25rem;
  background: var(--paper);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.panel .meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.button {
  display: inline-block;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 0.35rem 0.6rem;
  width: fit-content;
}

.button:hover,
.button:focus {
  background: var(--ink);
  color: var(--paper);
}

.tree {
  list-style: none;
  margin: 0;
  padding: 0 0 0 2ch;
}

.tree li {
  position: relative;
  padding-left: 2ch;
}

.tree li::before {
  content: "|-";
  position: absolute;
  left: 0;
}

.tree li:last-child::before {
  content: "\\-";
}

pre {
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--ink);
  background: #efe9df;
  overflow-x: auto;
}

code {
  background: #efe9df;
  padding: 0 0.25rem;
}

footer {
  border-top: 1px solid var(--ink);
  padding: calc(var(--line) * 1.25) 0 calc(var(--line) * 2);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }

  main,
  header,
  footer {
    width: min(92vw, 90ch);
  }
}