:root {
  --bg: #ffffff;
  --text: #1d2330;
  --muted: #5b6475;
  --line: #e3e6ec;
  --accent: #0f766e;
  --accent-ink: #ffffff;
  --navy: #13223f;
  --code-bg: #f4f6f9;
  --card: #f7f9fb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1522;
    --text: #e6e9ef;
    --muted: #a3acbd;
    --line: #273248;
    --accent: #2dd4bf;
    --accent-ink: #062723;
    --navy: #e6e9ef;
    --code-bg: #182235;
    --card: #151e2f;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 18px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
img { max-width: 100%; height: auto; display: block; margin: 1.5em auto; border-radius: 6px; border: 1px solid var(--line); }
h1, h2, h3 { line-height: 1.25; color: var(--navy); }
h1 { font-size: 2.1rem; margin: 0.4em 0 0.3em; }
h2 { font-size: 1.45rem; margin-top: 2em; }
h3 { font-size: 1.15rem; margin-top: 1.6em; }
code { font: 0.86em/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 4px; }
pre { background: var(--code-bg); padding: 14px 16px; overflow-x: auto; border-radius: 6px; border: 1px solid var(--line); line-height: 1.5; }
pre code { background: none; padding: 0; font-size: 0.82em; }
blockquote { margin: 1.5em 0; padding: 0 1em; border-left: 3px solid var(--accent); color: var(--muted); }
table { border-collapse: collapse; width: 100%; font-size: 0.9em; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; vertical-align: top; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2.5em 0; }

.site-header { border-bottom: 1px solid var(--line); }
.header-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 20px; padding-top: 14px; padding-bottom: 14px; }
.brand { font-weight: 700; font-size: 1.1rem; color: var(--navy); text-decoration: none; }
.nav { display: flex; flex-wrap: wrap; gap: 6px 18px; align-items: center; font-size: 0.95rem; }
.nav a { color: var(--text); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--accent); font-weight: 600; }
.nav a.nav-cta { background: var(--accent); color: var(--accent-ink); padding: 4px 12px; border-radius: 999px; font-weight: 600; }

.hero { padding: 2.2em 0 0.5em; }
.hero h1 { font-size: 2.3rem; }
.hero .lede { font-size: 1.15rem; color: var(--muted); margin-top: 0; }

.button { display: inline-block; background: var(--accent); color: var(--accent-ink); padding: 10px 18px; border-radius: 6px; font-weight: 600; text-decoration: none; }
.button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.button-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 1.2em 0; }

.subscribe { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 8px; padding: 18px 22px; margin: 2.5em 0; }
.subscribe h2 { margin: 0 0 0.3em; font-size: 1.25rem; }
.subscribe p { margin: 0 0 1em; color: var(--muted); }
.subscribe-line { font-weight: 600; margin-top: 2.5em; }

.post-list { list-style: none; padding: 0; margin: 0; }
.post-list li { padding: 1.1em 0; border-bottom: 1px solid var(--line); }
.post-list li:last-child { border-bottom: 0; }
.post-list time { display: block; font-size: 0.85rem; color: var(--muted); }
.post-list .post-link { font-size: 1.2rem; font-weight: 650; text-decoration: none; color: var(--navy); }
.post-list .post-link:hover { color: var(--accent); }
.post-list p { margin: 0.3em 0 0; color: var(--muted); font-size: 0.97rem; }

.post-header { padding-top: 1.5em; }
.dek { font-size: 1.15rem; color: var(--muted); margin: 0 0 0.6em; }
.meta { font-size: 0.9rem; color: var(--muted); }
.post-body { margin-top: 1.5em; }
.post-nav { display: flex; justify-content: space-between; gap: 20px; font-size: 0.92rem; margin: 2em 0; }

.note { background: var(--card); border: 1px dashed var(--line); border-radius: 8px; padding: 14px 18px; }
.badge { display: inline-block; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; background: var(--navy); color: var(--bg); padding: 2px 8px; border-radius: 4px; vertical-align: middle; }

.site-footer { border-top: 1px solid var(--line); margin-top: 3em; padding: 1.5em 0 2em; font-size: 0.92rem; color: var(--muted); }
.site-footer p { margin: 0.3em 0; }
.site-footer .small { font-size: 0.82rem; }
.site-footer .tip { color: var(--muted); }

@media (max-width: 560px) {
  body { font-size: 17px; }
  h1, .hero h1 { font-size: 1.7rem; }
  h2 { font-size: 1.3rem; }
  .post-nav { flex-direction: column; }
}