:root {
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --faint: #999;
  --link: #185fa5;
  --link-hover: #0c447c;
  --bg: #fdfcfa;
  --rule: #e5e3de;
  --serif: "Newsreader", "Charter", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", "Menlo", "Monaco", "Courier New", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e8e6e3;
    --muted: #a0a0a0;
    --faint: #707070;
    --link: #6aa7e6;
    --link-hover: #9cc4ec;
    --bg: #1a1a1a;
    --rule: #2e2e2e;
  }
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  font-family: var(--serif);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
  font-optical-sizing: auto;
  margin: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  max-width: 620px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 2.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 14px;
}

nav a {
  color: var(--text);
  text-decoration: none;
}

nav > a:first-child {
  font-weight: 500;
}

nav .nav-links a {
  margin-left: 1rem;
  color: var(--muted);
}

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

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

h1 { font-size: 28px; margin: 0 0 1.5rem; }
h2 { font-size: 22px; margin: 2.5rem 0 1rem; }
h3 { font-size: 18px; margin: 2rem 0 0.75rem; }

p { margin: 0 0 1.1rem; }

a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 0.5px;
}
a:hover { color: var(--link-hover); }

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: rgba(0,0,0,0.04);
  padding: 1px 4px;
  border-radius: 3px;
}
@media (prefers-color-scheme: dark) {
  code { background: rgba(255,255,255,0.08); }
}

pre {
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.5;
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--bg);
}
pre code {
  background: transparent;
  padding: 0;
}

blockquote {
  border-left: 2px solid var(--rule);
  margin: 1.5rem 0;
  padding-left: 1.25rem;
  color: var(--muted);
  font-style: italic;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2.5rem 0;
}

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

footer {
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--faint);
  font-family: var(--sans);
  font-size: 13px;
}

footer a { color: var(--faint); }

/* Writing list */
.writing-list { list-style: none; padding: 0; margin: 0; }
.writing-list li { margin-bottom: 1.25rem; }
.writing-list .title { font-size: 17px; }
.writing-list .meta {
  display: block;
  font-family: var(--sans);
  font-size: 13px;
  color: var(--faint);
  margin-top: 2px;
}
.writing-list .desc {
  font-size: 15px;
  color: var(--muted);
  margin-top: 4px;
}

/* Crosspost banner inside a post */
.crosspost-note {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--muted);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 8px 12px;
  margin: 0 0 2rem;
}

/* KaTeX tweaks */
.katex { font-size: 1.05em; }
.katex-display { overflow-x: auto; overflow-y: hidden; padding: 4px 0; }