:root {
  --bg: #ffffff;
  --fg: #16181d;
  --muted: #6a6f7a;
  --border: #e6e8ec;
  --accent: #2b5c9b;
  --code-bg: #f6f7f9;
  --max: 44rem;

  --tok-comment: #8a8f98;
  --tok-keyword: #a626a4;
  --tok-string: #4e8a3e;
  --tok-number: #986801;
  --tok-func: #2b5c9b;
  --tok-type: #b57600;
  --tok-err: #d1495b;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1115;
    --fg: #e6e8ec;
    --muted: #9aa0ab;
    --border: #23262d;
    --accent: #7cb0ff;
    --code-bg: #171a20;

    --tok-comment: #6f7683;
    --tok-keyword: #c78fdb;
    --tok-string: #8fce7a;
    --tok-number: #e5c07b;
    --tok-func: #7cb0ff;
    --tok-type: #e5c07b;
    --tok-err: #e06c75;
  }
}

:root[data-theme="dark"] {
  --bg: #0f1115;
  --fg: #e6e8ec;
  --muted: #9aa0ab;
  --border: #23262d;
  --accent: #7cb0ff;
  --code-bg: #171a20;

  --tok-comment: #6f7683;
  --tok-keyword: #c78fdb;
  --tok-string: #8fce7a;
  --tok-number: #e5c07b;
  --tok-func: #7cb0ff;
  --tok-type: #e5c07b;
  --tok-err: #e06c75;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* header */
.site-header { padding: 2.25rem 0 0; }
.site-header .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.brand {
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
  text-decoration: none;
}
.nav {
  display: flex;
  align-items: baseline;
  gap: 1.1rem;
  font-size: 0.95rem;
}
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover { color: var(--fg); }
.theme-toggle {
  background: none;
  border: 0;
  padding: 0;
  color: var(--muted);
  font: inherit;
  font-size: 0.95rem;
  cursor: pointer;
}
.theme-toggle:hover { color: var(--fg); }

main { padding: 2.75rem 0 5rem; }

/* type */
h1, h2, h3 { line-height: 1.25; letter-spacing: -0.02em; font-weight: 650; }
h1 { font-size: 2rem; margin: 0 0 0.6em; }
h2 { font-size: 1.25rem; margin: 2.6em 0 0.7em; }
h3 { font-size: 1.05rem; margin: 2em 0 0.6em; }
p { margin: 0 0 1.15em; }

a {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 0.18em;
}
a:hover { text-decoration: underline; text-decoration-thickness: 1px; }

.lede { font-size: 1.15rem; }

.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
}
.post-list li { border-bottom: 1px solid var(--border); }
.post-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 0.7rem 0;
  color: var(--fg);
  text-decoration: none;
}
.post-list a:hover { text-decoration: none; }
.post-list a:hover .t { color: var(--accent); }
.post-list .d {
  color: var(--muted);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* post */
.post-head { margin-bottom: 2.5rem; }
.post-head h1 { margin-bottom: 0.35em; }
.post-sub { color: var(--muted); margin: 0 0 0.9em; font-size: 1.05rem; }
.post-meta {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 0;
  font-variant-numeric: tabular-nums;
}

.post-content > :first-child { margin-top: 0; }
.post-content h2 { margin-top: 2.2em; }
.post-content img { max-width: 100%; height: auto; border-radius: 6px; }
.post-content hr { border: 0; border-top: 1px solid var(--border); margin: 2.5em 0; }
.post-content blockquote {
  margin: 1.6em 0;
  padding: 0.1em 0 0.1em 1.1em;
  border-left: 3px solid var(--border);
  color: var(--muted);
}
.post-content ul, .post-content ol { padding-left: 1.4em; margin: 0 0 1.15em; }
.post-content li { margin: 0.35em 0; }

.post-content table:not(.rouge-table) {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 0.95rem;
  display: block;
  overflow-x: auto;
}
.post-content table:not(.rouge-table) th,
.post-content table:not(.rouge-table) td {
  border-bottom: 1px solid var(--border);
  padding: 0.5em 0.7em;
  text-align: left;
}
.post-content table:not(.rouge-table) th { font-weight: 600; }

/* code */
code, pre, kbd {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
}
code {
  font-size: 0.875em;
  background: var(--code-bg);
  padding: 0.15em 0.35em;
  border-radius: 4px;
}
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  line-height: 1.55;
  margin: 0 0 1.5em;
}
pre code { background: none; padding: 0; font-size: 0.85rem; }

/* rouge */
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cs, .highlight .cp { color: var(--tok-comment); font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kc, .highlight .kt, .highlight .kr { color: var(--tok-keyword); }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sc, .highlight .sd, .highlight .se { color: var(--tok-string); }
.highlight .mi, .highlight .mf, .highlight .m, .highlight .mh, .highlight .il { color: var(--tok-number); }
.highlight .nf, .highlight .fm, .highlight .nb { color: var(--tok-func); }
.highlight .nc, .highlight .nn, .highlight .no { color: var(--tok-type); }
.highlight .err, .highlight .na, .highlight .gd { color: var(--tok-err); }
.highlight .gi { color: var(--tok-string); }

.highlight .rouge-table { width: 100%; border-collapse: collapse; margin: 0; display: table; }
.highlight .rouge-table td { padding: 0; border: 0; vertical-align: top; }
.highlight .rouge-gutter { padding-right: 1rem; user-select: none; }
.highlight .rouge-gutter pre { color: var(--muted); }
.highlight .rouge-table pre {
  background: none;
  border: 0;
  border-radius: 0;
  padding: 0;
  margin: 0;
}

/* post nav */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}
.post-nav a { max-width: 48%; }

/* footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2.75rem;
  color: var(--muted);
  font-size: 0.85rem;
}

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  h1 { font-size: 1.6rem; }
  main { padding: 2rem 0 4rem; }
  .site-header .wrap { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
  .nav { flex-wrap: wrap; gap: 0.9rem; }
  .post-list a { flex-direction: column; gap: 0.1rem; }
  .post-nav { flex-direction: column; gap: 0.9rem; }
  .post-nav a { max-width: 100%; }
}