:root {
  --bg: #fbfaf8;
  --text: #1c1c1a;
  --muted: #62605b;
  --rule: #e3e0d9;
  --link: #1f4a8a;
  --link-hover: #0f2f60;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --text: #e8e6e1;
    --muted: #a19e97;
    --rule: #2f2e2b;
    --link: #8fb3e8;
    --link-hover: #b9d0f2;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

a {
  color: var(--link);
  text-underline-offset: 2px;
}

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

h1,
h2,
h3 {
  margin: 0;
  font-weight: 600;
  line-height: 1.25;
}

p {
  margin: 0 0 14px;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */

.site-header {
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding-top: 22px;
  padding-bottom: 20px;
}

.wordmark {
  color: var(--text);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.wordmark:hover {
  color: var(--text);
}

.site-header nav {
  display: flex;
  gap: 24px;
  font-size: 15px;
}

.site-header nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-header nav a:hover {
  color: var(--text);
}

/* Intro */

.intro {
  padding-top: 72px;
  padding-bottom: 56px;
}

.intro h1 {
  max-width: 18em;
  margin-bottom: 20px;
  font-size: 38px;
  letter-spacing: -0.015em;
}

.intro p {
  max-width: 36em;
  color: var(--muted);
  font-size: 19px;
}

/* Sections */

.block {
  display: grid;
  grid-template-columns: 200px 1fr;
  column-gap: 32px;
  padding-bottom: 40px;
}

/* The rule sits inside the grid so it lines up with the text, not the page padding. */
.block::before {
  content: "";
  grid-column: 1 / -1;
  border-top: 1px solid var(--rule);
  margin-bottom: 40px;
}

.block h2 {
  font-size: 19px;
}

.block-body {
  max-width: 40em;
}

.block-body p:last-child {
  margin-bottom: 0;
}

.item + .item {
  margin-top: 30px;
}

.item h3 {
  margin-bottom: 8px;
  font-size: 17px;
}

.lead {
  font-weight: 600;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  font-size: 15px;
}

/* Footer */

.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--rule);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 14px;
}

.site-footer p {
  margin: 0 0 4px;
}

@media (max-width: 720px) {
  body {
    font-size: 16px;
  }

  .wrap {
    padding: 0 18px;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 6px 24px;
  }

  .site-header nav {
    gap: 18px;
  }

  .intro {
    padding-top: 44px;
    padding-bottom: 36px;
  }

  .intro h1 {
    font-size: 29px;
  }

  .intro p {
    font-size: 17px;
  }

  .block {
    grid-template-columns: 1fr;
    row-gap: 16px;
    padding-bottom: 28px;
  }

  .block::before {
    margin-bottom: 16px;
  }
}