:root {
  --fg: #1f2328;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #fdfdfc;
  --accent: #2563eb;
}

* { box-sizing: border-box; }

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", sans-serif;
}

.wrap { max-width: 720px; margin: 0 auto; padding: 56px 24px 96px; }

header h1 { font-size: 1.6rem; margin: 0 0 6px; letter-spacing: .01em; }
header p  { color: var(--muted); margin: 0 0 40px; font-size: .95rem; }

nav {
  margin: 0 0 44px; padding-bottom: 18px;
  border-bottom: 1px solid var(--line); font-size: .94rem;
}
nav a { color: var(--muted); text-decoration: none; margin-right: 20px; }
nav a:hover, nav a.on { color: var(--accent); }

h2 { font-size: 1.05rem; margin: 40px 0 14px; font-weight: 600; }

ul.posts { list-style: none; padding: 0; margin: 0; }
ul.posts li { padding: 14px 0; border-bottom: 1px solid var(--line); }
ul.posts li:last-child { border-bottom: 0; }
ul.posts a { color: var(--fg); text-decoration: none; }
ul.posts a:hover { color: var(--accent); }
ul.posts time { display: block; color: var(--muted); font-size: .82rem; margin-top: 3px; }

article h1 { font-size: 1.4rem; margin: 0 0 6px; }
article .meta { color: var(--muted); font-size: .85rem; margin: 0 0 32px; }
article p { margin: 0 0 18px; }
article code {
  background: #f3f4f6; padding: 1px 5px; border-radius: 4px;
  font-size: .9em; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
article pre {
  background: #f6f7f9; border: 1px solid var(--line); border-radius: 6px;
  padding: 14px 16px; overflow-x: auto; font-size: .88rem;
}
article pre code { background: none; padding: 0; }

.back { display: inline-block; margin-top: 40px; color: var(--muted);
        text-decoration: none; font-size: .9rem; }
.back:hover { color: var(--accent); }

footer {
  margin-top: 64px; padding-top: 20px; border-top: 1px solid var(--line);
  color: var(--muted); font-size: .82rem;
}