:root {
  --fg: #1c1e21;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #fdfdfc;
  --accent: #2563eb;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
}

.wrap { max-width: 720px; margin: 0 auto; padding: 0 22px; }

header {
  border-bottom: 1px solid var(--line);
  padding: 26px 0 18px;
}

header .wrap { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

.brand { font-size: 19px; font-weight: 650; letter-spacing: .2px; }
.brand a { color: var(--fg); text-decoration: none; }

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 18px;
  font-size: 14.5px;
}
nav a:first-child { margin-left: 0; }
nav a:hover { color: var(--accent); }

main { padding: 40px 0 56px; }

h1 { font-size: 26px; line-height: 1.35; margin: 0 0 6px; letter-spacing: -.2px; }
h2 { font-size: 19px; margin: 38px 0 12px; }
h3 { font-size: 17px; margin: 26px 0 8px; }

.lead { color: var(--muted); margin: 0 0 34px; }

ul.posts { list-style: none; padding: 0; margin: 0; }

ul.posts li {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

ul.posts li:last-child { border-bottom: 0; }

ul.posts a { color: var(--fg); text-decoration: none; font-weight: 550; }
ul.posts a:hover { color: var(--accent); }

ul.posts time {
  display: block;
  color: var(--muted);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  margin-top: 3px;
}

article p { margin: 0 0 18px; }
article ul, article ol { padding-left: 22px; }
article li { margin: 6px 0; }

blockquote {
  margin: 22px 0;
  padding: 2px 0 2px 16px;
  border-left: 3px solid var(--line);
  color: var(--muted);
}

code {
  background: #f3f4f6;
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 13.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

pre {
  background: #f6f7f9;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 14px 16px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.6;
}
pre code { background: none; padding: 0; }

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13.5px;
  padding: 22px 0 40px;
}
footer a { color: var(--muted); }