/* The blog's entire stylesheet. Everything is here.
   Typography rules: 65 characters per line, 18 px, line height 1.6, softened contrast. */

:root {
  --text: #222;
  --muted: #6b6b6b;
  --bg: #fbfbf9;
  --link: #1a4fa3;
  --rule: #e2e2dd;
  --code-bg: #f0f0ec;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e6e6e2;
    --muted: #9a9a94;
    --bg: #161616;
    --link: #8ab4f8;
    --rule: #2e2e2e;
    --code-bg: #232323;
  }
}

* { box-sizing: border-box; }

html { font-size: 18px; }
@media (max-width: 600px) { html { font-size: 17px; } }

body {
  margin: 0;
  padding: 2.5rem 1.25rem 4rem;
  max-width: 65ch;
  margin-inline: auto;
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin-bottom: 3rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--rule);
}
.site-title { font-weight: bold; color: var(--text); font-size: 1.1rem; }
.site-header nav a { margin-left: 1.25rem; color: var(--muted); }
.site-header nav a:first-child { margin-left: 0; }

/* Headings */
h1, h2, h3 { line-height: 1.25; font-weight: bold; letter-spacing: -0.01em; }
h1 { font-size: 1.9rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.35rem; margin: 2.5rem 0 0.75rem; }
h3 { font-size: 1.1rem; margin: 2rem 0 0.5rem; }

.meta { color: var(--muted); font-size: 0.9rem; margin: 0 0 2.5rem; }

/* Post list on the home page */
.intro { margin-bottom: 2.5rem; }
.year { color: var(--muted); font-size: 0.95rem; font-weight: normal; margin-top: 2rem; }
.post-list { list-style: none; padding: 0; margin: 0; }
.post-list li { display: flex; gap: 1.25rem; align-items: baseline; padding: 0.35rem 0; }
.post-list time { color: var(--muted); font-size: 0.85rem; min-width: 6.5rem; flex-shrink: 0; font-variant-numeric: tabular-nums; }
@media (max-width: 600px) {
  .post-list li { flex-direction: column; gap: 0; padding: 0.6rem 0; }
}

/* Body text */
p, ul, ol { margin: 0 0 1.25rem; }
blockquote {
  margin: 1.5rem 0;
  padding-left: 1.25rem;
  border-left: 3px solid var(--rule);
  color: var(--muted);
}
hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }
img { max-width: 100%; height: auto; display: block; margin: 1.5rem auto; }
figcaption { text-align: center; color: var(--muted); font-size: 0.85rem; }

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: var(--code-bg);
  border-radius: 4px;
}
code { padding: 0.1em 0.35em; }
pre { padding: 1rem; overflow-x: auto; line-height: 1.45; }
pre code { padding: 0; background: none; }

table { border-collapse: collapse; width: 100%; margin: 1.5rem 0; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--rule); }

/* Embedded videos (YouTube, Vimeo): always 16/9 and mobile friendly */
iframe { max-width: 100%; }
.content iframe[src*="youtube"], .content iframe[src*="vimeo"] {
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  border: 0;
  margin: 1.5rem 0;
}

/* Previous / next navigation */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9rem;
}
.post-nav a:last-child { margin-left: auto; text-align: right; }

/* Footer and newsletter */
.site-footer {
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.85rem;
}
.newsletter { margin-bottom: 1.5rem; color: var(--text); font-size: 1rem; }
.newsletter p { margin-bottom: 0.5rem; }
.newsletter form { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.newsletter input {
  flex: 1 1 14rem;
  font: inherit;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: transparent;
  color: var(--text);
}
.newsletter button {
  font: inherit;
  padding: 0.5rem 1rem;
  border: 1px solid var(--text);
  border-radius: 4px;
  background: var(--text);
  color: var(--bg);
  cursor: pointer;
}