:root {
  color-scheme: light dark;
  --max-width: 680px;
  --fg: #222;
  --bg: #fafafa;
  --muted: #777;
  --link: #0645ad;
  --rule: rgba(128, 128, 128, 0.25);
  --code-bg: rgba(128, 128, 128, 0.12);
}
/* dark palette — OS preference wins unless the user picked light */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --fg: #eaeaea; --bg: #161616; --muted: #9a9a9a; --link: #8ab4f8;
  }
}
/* manual override */
:root[data-theme="dark"] {
  --fg: #eaeaea; --bg: #161616; --muted: #9a9a9a; --link: #8ab4f8;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}

header, main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1rem;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--rule);
}
header .site { font-weight: 600; text-decoration: none; color: inherit; }
header nav { display: flex; align-items: center; gap: 1rem; }
header nav a { color: var(--link); }
#theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  color: inherit;
  padding: 0.15rem 0.3rem;
}
#theme-toggle:hover { color: var(--link); }
#theme-toggle:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
  border-radius: 3px;
}

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

h1, h2, h3 { line-height: 1.25; }
article h1 { margin-bottom: 0.15rem; }
.date { color: var(--muted); margin-top: 0; font-size: 0.9rem; }
.back { color: var(--muted); }
article + .back { margin-top: 3rem; }

img { max-width: 100%; height: auto; display: block; margin: 1rem 0; }

.posts { list-style: none; padding: 0; margin: 1rem 0; }
.posts li {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  margin: 0.6rem 0;
}
.posts time {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  min-width: 6.5rem;
  font-size: 0.9rem;
}
.posts a { text-decoration: none; }
.posts a:hover { text-decoration: underline; }

pre, code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
}
pre {
  background: var(--code-bg);
  padding: 0.75rem 1rem;
  border-radius: 4px;
  overflow-x: auto;
}
code { background: var(--code-bg); padding: 0.1em 0.3em; border-radius: 3px; }
pre code { background: none; padding: 0; }

blockquote {
  margin: 1rem 0;
  padding: 0.25rem 1rem;
  border-left: 3px solid var(--rule);
  color: var(--muted);
}
hr { border: none; border-top: 1px solid var(--rule); margin: 2rem 0; }

.linebreak { height: 1.5rem; }

.avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  margin: 1.5rem auto;
}

@media (max-width: 480px) {
  .posts li { flex-direction: column; gap: 0.1rem; }
  .posts time { min-width: 0; }
}