:root {
  --bg: #0e0f12;
  --surface: #16181d;
  --surface-2: #1c1f25;
  --border: #23262d;
  --border-soft: #2a2e36;
  --text: #e7e9ee;
  --text-2: #b3b9c5;
  --muted: #9aa3b2;
  --accent: #f14e3a;
  --accent-soft: #ff8a73;
  --code-bg: #0b0c0f;
  --code-text: #d6dae3;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-soft); text-decoration: none; transition: color .15s ease; }
a:hover { color: #ffb0a0; }

/* nav */
nav.site {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14, 15, 18, .85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
}
nav.site .logo {
  font-weight: 700; font-size: 16px;
  color: var(--text);
  display: inline-flex; align-items: center; gap: 8px;
}
nav.site .logo::before {
  content: ""; width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}
nav.site .links { display: flex; gap: 18px; flex-wrap: wrap; font-size: 14.5px; }
nav.site .links a { color: var(--text-2); }
nav.site .links a:hover { color: var(--accent-soft); }

/* layout */
main { max-width: 820px; margin: 0 auto; padding: 36px 24px 80px; }
main.wide { max-width: 1080px; }

.crumbs { color: var(--muted); font-size: 13.5px; margin: 0 0 8px; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--text-2); }

h1 { font-size: 34px; line-height: 1.2; margin: 4px 0 12px; letter-spacing: -.015em; }
h2 { font-size: 24px; margin: 40px 0 12px; padding-top: 22px; border-top: 1px solid var(--border); letter-spacing: -.005em; }
h3 { font-size: 19px; margin: 26px 0 8px; }
h4 { font-size: 14px; margin: 18px 0 6px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
p, ul, ol { margin: 10px 0 14px; }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }

.lead { color: var(--text-2); font-size: 18px; margin: 4px 0 28px; }
.meta { color: var(--muted); font-size: 13.5px; margin: 0 0 24px; display: flex; gap: 16px; flex-wrap: wrap; }
.meta .dot { color: var(--border-soft); }

/* code */
code, pre {
  font: 13px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
code { padding: 2px 6px; color: #ffb0a0; }
pre { padding: 14px 16px; overflow-x: auto; margin: 12px 0; }
pre code { padding: 0; border: 0; background: transparent; color: var(--code-text); }

/* tables */
table { width: 100%; border-collapse: collapse; margin: 14px 0 20px; font-size: 14.5px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: .05em; }

/* callouts */
.callout {
  border-left: 3px solid var(--accent);
  background: #1a1410;
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  margin: 18px 0;
  color: var(--text-2);
  font-size: 15px;
}
.callout.note { border-left-color: #5a8dee; background: #101521; }
.callout.warn { border-left-color: #ffb454; background: #1c1610; }

/* tag chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 18px; }
.chip {
  font-size: 12.5px;
  color: var(--text-2);
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  padding: 4px 12px;
}

/* blog listing */
.posts { display: grid; gap: 16px; margin-top: 24px; }
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px 24px;
  transition: transform .12s ease, border-color .15s ease;
}
.post-card:hover { transform: translateY(-2px); border-color: var(--border-soft); }
.post-card h2 {
  font-size: 20px; margin: 0 0 8px; padding: 0; border: 0;
}
.post-card h2 a { color: var(--text); }
.post-card h2 a:hover { color: var(--accent-soft); }
.post-card .excerpt { color: var(--text-2); font-size: 15px; margin: 0 0 12px; }
.post-card .meta { margin: 0; }

/* related posts */
.related {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.related h2 { border: 0; padding: 0; margin: 0 0 14px; }
.related ul { list-style: none; padding: 0; }
.related li { padding: 8px 0; border-bottom: 1px solid var(--border); }
.related li:last-child { border-bottom: 0; }
.related a { color: var(--text); font-weight: 500; }
.related a:hover { color: var(--accent-soft); }
.related .why { color: var(--muted); font-size: 13.5px; display: block; margin-top: 2px; }

/* article footer */
footer.article-foot {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13.5px;
}
footer.article-foot a { color: var(--text-2); }

/* mobile */
@media (max-width: 640px) {
  h1 { font-size: 28px; }
  h2 { font-size: 21px; }
  main { padding: 24px 18px 60px; }
  nav.site { padding: 12px 18px; }
}