:root {
  --fg: #111;
  --muted: #777;
  --bg: #fff;
  --code-bg: #f6f6f6;
  --rule: #eee;
}

* { box-sizing: border-box; }

html { font-size: 16px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  max-width: 680px;
  margin: 3rem auto;
  padding: 0 1.25rem 6rem;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
}

a:hover { text-decoration-thickness: 2px; }

h1, h2, h3 { font-weight: 600; line-height: 1.3; }
h1 { font-size: 1.25rem; margin: 2rem 0 1rem; }
h2 { font-size: 1rem; margin: 2.5rem 0 0.75rem; }
h3 { font-size: 1rem; margin: 1.5rem 0 0.5rem; }

p, ul, ol { margin: 0.75rem 0; }

ul.plain {
  list-style: none;
  padding: 0;
}

ul.plain li {
  margin: 0.35rem 0;
}

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

nav {
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

.intro {
  padding-top: 1rem;
  margin-bottom: 4rem;
  text-align: center;
}

.intro p { margin: 0; }

.avatar {
  display: block;
  margin: 1rem auto;
  width: 160px;
  height: 160px;
  max-width: 100%;
  border-radius: 50%;
}

section + section { margin-top: 2.25rem; }

code {
  background: var(--code-bg);
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  font-size: 0.9em;
  font-family: "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

pre {
  background: var(--code-bg);
  padding: 0.85rem 1rem;
  border-radius: 4px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
  margin: 1rem 0;
}

pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: 1em;
}

blockquote {
  margin: 1rem 0;
  padding-left: 1rem;
  border-left: 2px solid var(--rule);
  color: var(--muted);
}

hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 2rem 0;
}

img { max-width: 100%; height: auto; }

article h1 { font-size: 1.5rem; margin-bottom: 0.25rem; }
article .meta { margin-bottom: 1.75rem; display: block; }

/* KaTeX display blocks should not overflow line height */
.katex-display { overflow-x: auto; overflow-y: hidden; padding: 0.25rem 0; }