:root {
  color-scheme: light;
  --text: #1c1917;
  --muted: #44403c;
  --line: #d6d3d1;
  --bg: #fafaf9;
  --card: #ffffff;
  --link: #1d4ed8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 1.05rem;
  line-height: 1.75;
}

a { color: var(--link); }

a:hover { text-decoration: none; }

.skip {
  position: absolute;
  left: 0.5rem;
  top: -3rem;
  background: #fff;
  padding: 0.4rem 0.7rem;
}

.skip:focus { top: 0.5rem; }

.wrap {
  max-width: 46rem;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 3rem;
}

header.site {
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.5rem;
  padding-bottom: 0.8rem;
}

.brand {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 650;
}

.brand a { color: inherit; text-decoration: none; }

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  margin: 0.45rem 0 0;
  padding: 0;
  list-style: none;
}

nav a { text-decoration: none; }

nav a[aria-current="page"] { text-decoration: underline; font-weight: 650; }

h1 { font-size: 1.7rem; line-height: 1.3; margin: 0 0 0.6rem; }

h2 { font-size: 1.2rem; margin: 1.6rem 0 0.4rem; }

h3 { font-size: 1.05rem; margin: 1.1rem 0 0.3rem; }

p, li { margin: 0.4rem 0; }

.meta { color: var(--muted); font-size: 0.92rem; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.8rem 1rem;
  margin: 1rem 0;
}

dl { margin: 0.4rem 0; }
dt { font-weight: 650; margin-top: 0.55rem; }
dd { margin: 0.1rem 0 0; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.98rem;
  margin: 0.6rem 0 1rem;
}

th, td {
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  padding: 0.4rem 0.45rem;
}

th { font-weight: 650; }

article.log {
  border-top: 1px solid var(--line);
  padding-top: 0.2rem;
  margin-top: 1.2rem;
}

footer.site {
  margin-top: 2.2rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}