/* 日拱一卒：单栏阅读，正文约 680px；日期、标签用等宽字体。不加载外部字体和脚本。 */
:root {
  --bg: #f7f8f6;
  --ink: #1d2320;
  --muted: #5d6762;
  --line: #dfe3df;
  --accent: #b5560f;
  --code-bg: #eef1ed;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161a18;
    --ink: #e4e8e5;
    --muted: #9aa49f;
    --line: #2f3633;
    --accent: #e08a45;
    --code-bg: #262c29;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.8 var(--sans);
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.wrap { max-width: 680px; margin: 0 auto; padding-block: 32px 24px; display: grid; gap: 40px; }
a { color: var(--accent); text-underline-offset: 3px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

header.site {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: 8px 24px; border-bottom: 2px solid var(--ink); padding-bottom: 12px;
}
.brand { font-size: 22px; font-weight: 700; letter-spacing: .04em; color: var(--ink); text-decoration: none; }
.brand small { font: 12px var(--mono); color: var(--muted); margin-left: 8px; letter-spacing: 0; font-weight: 400; }
nav { display: flex; gap: 20px; font-size: 15px; }
nav a { color: var(--muted); text-decoration: none; }
nav a[aria-current="page"] { color: var(--ink); font-weight: 600; }

main { display: grid; gap: 40px; }
.intro { color: var(--muted); margin: 0; }
h1, h2 { text-wrap: balance; line-height: 1.35; margin: 0; }

.list { display: grid; }
.item { display: grid; grid-template-columns: 92px 1fr; gap: 4px 20px; padding-block: 18px; border-top: 1px solid var(--line); }
.item:last-child { border-bottom: 1px solid var(--line); }
.item time { font: 13px/1.9 var(--mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.item h2 { font-size: 18px; }
.item h2 a { color: var(--ink); text-decoration: none; }
.item h2 a:hover { color: var(--accent); }
.item p { grid-column: 2; margin: 0; color: var(--muted); font-size: 15px; }
.tags { grid-column: 2; display: flex; flex-wrap: wrap; gap: 6px; }
.tag { font: 12px var(--mono); color: var(--muted); border: 1px solid var(--line); border-radius: 3px; padding: 0 6px; text-decoration: none; }
a.tag:hover { color: var(--accent); border-color: var(--accent); }
article > .tags { grid-column: auto; margin-top: -8px; }

.page-title { font-size: 28px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; align-items: baseline; gap: 6px; padding: 2px 12px; border: 1px solid var(--line); border-radius: 999px;
  color: var(--ink); text-decoration: none; font-size: 14px; }
.chip span { font: 12px var(--mono); color: var(--muted); }
.chip:hover, .chip.on { border-color: var(--accent); color: var(--accent); }
.more { margin: 0; font-size: 14px; color: var(--muted); }

.month { display: grid; gap: 8px; }
.month h2 { font-size: 16px; color: var(--muted); font-weight: 600; }
.archive { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.archive li { display: grid; grid-template-columns: 56px 1fr; gap: 16px; padding-block: 10px; border-bottom: 1px solid var(--line); }
.archive time { font: 13px/1.9 var(--mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.archive a { color: var(--ink); text-decoration: none; min-width: 0; }
.archive a:hover { color: var(--accent); }

.shelf { display: grid; gap: 10px; }
.shelf h2 { display: flex; align-items: baseline; gap: 8px; }
.count { font: 13px var(--mono); color: var(--muted); font-weight: 400; }
.books { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.books li { display: grid; grid-template-columns: auto 1fr auto; gap: 2px 12px; align-items: baseline; padding-block: 12px; border-bottom: 1px solid var(--line); }
.book-title { font-weight: 600; }
.book-author { color: var(--muted); font-size: 14px; }
.book-date { font: 13px var(--mono); color: var(--muted); grid-column: 3; grid-row: 1; }
.book-note { grid-column: 1 / -1; color: var(--muted); font-size: 15px; }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; border-top: 1px solid var(--line); padding-top: 16px; }
.pager a { display: grid; gap: 2px; color: var(--ink); text-decoration: none; font-size: 15px; min-width: 0; }
.pager a span { font-size: 13px; color: var(--muted); }
.pager a:hover { color: var(--accent); }
.pager .next { grid-column: 2; text-align: right; }

article { display: grid; gap: 20px; min-width: 0; }
article .meta { font: 13px var(--mono); color: var(--muted); }
article h1 { font-size: 28px; }
article h2 { font-size: 20px; margin-top: 12px; }
article p, article ol, article ul { margin: 0; }
article li + li { margin-top: 6px; }
code { font: .9em var(--mono); background: var(--code-bg); padding: 1px 5px; border-radius: 3px; }
.tablebox { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 13px; white-space: nowrap; }
td:first-child { font-family: var(--mono); white-space: nowrap; }
.note { border-left: 3px solid var(--accent); padding: 4px 0 4px 14px; color: var(--muted); }
.back { font-size: 15px; }

footer.site {
  border-top: 1px solid var(--line); padding-top: 16px; font-size: 13px; color: var(--muted);
  display: flex; flex-wrap: wrap; gap: 6px 18px;
}
footer.site a { color: var(--muted); }

@media (max-width: 480px) {
  .item { grid-template-columns: 1fr; }
  .item p, .tags { grid-column: 1; }
  article h1, .page-title { font-size: 24px; }
  .pager { grid-template-columns: 1fr; }
  .pager .next { grid-column: 1; text-align: left; }
  .books li { grid-template-columns: 1fr auto; }
  .book-author { grid-column: 1; }
  .book-date { grid-column: 2; }
}
@media (prefers-reduced-motion: no-preference) { a { transition: color .15s; } }