:root {
  --fg: #1a1a1a;
  --muted: #666;
  --bg: #fdfdfd;
  --accent: #0066cc;
  --max-width: 42rem;
  --border: #eee;
  --table-border: rgba(127,127,127,0.15);
  --table-header-bg: rgba(127,127,127,0.08);
  --table-stripe: rgba(127,127,127,0.04);
  --pre-bg: rgba(127,127,127,0.10);
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #ececec;
    --muted: #999;
    --bg: #121212;
    --accent: #66b3ff;
    --border: #2a2a2a;
    --table-border: rgba(255,255,255,0.08);
    --table-header-bg: rgba(255,255,255,0.05);
    --table-stripe: rgba(255,255,255,0.03);
    --pre-bg: rgba(255,255,255,0.05);
  }
}
html[data-theme="dark"] {
  --fg: #ececec;
  --muted: #999;
  --bg: #121212;
  --accent: #66b3ff;
  --border: #2a2a2a;
  --table-border: rgba(255,255,255,0.08);
  --table-header-bg: rgba(255,255,255,0.05);
  --table-stripe: rgba(255,255,255,0.03);
  --pre-bg: rgba(255,255,255,0.05);
}
html[data-theme="light"] {
  --fg: #1a1a1a;
  --muted: #666;
  --bg: #fdfdfd;
  --accent: #0066cc;
  --border: #eee;
  --table-border: rgba(127,127,127,0.15);
  --table-header-bg: rgba(127,127,127,0.08);
  --table-stripe: rgba(127,127,127,0.04);
  --pre-bg: rgba(127,127,127,0.10);
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}
main, header, footer {
  width: 100%;
  max-width: var(--max-width);
  padding: 1.5rem 1.25rem;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
}
header a { color: var(--fg); text-decoration: none; font-weight: 600; }
header nav a { color: var(--muted); margin-left: 1rem; font-weight: 400; }
header nav a:hover, header nav a:focus { color: var(--accent); }
main { flex: 1; }
footer {
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  text-align: center;
}
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.25; }
h1 { font-size: 1.9rem; margin-top: 0.5rem; }
h2 { font-size: 1.4rem; margin-top: 2rem; }
code {
  background: rgba(127,127,127,0.12);
  padding: 0.1em 0.35em;
  border-radius: 3px;
  font-size: 0.92em;
}
pre {
  background: var(--pre-bg);
  padding: 0.9rem 1rem;
  border-radius: 6px;
  overflow-x: auto;
  position: relative;
}
pre code { background: transparent; padding: 0; }

.code-block { position: relative; }
.copy-btn {
  position: absolute;
  top: 0.35rem;
  right: 0.5rem;
  z-index: 1;
  padding: 0.2rem 0.55rem;
  font-size: 0.75em;
  font-family: inherit;
  line-height: 1.4;
  border: 1px solid rgba(127,127,127,0.25);
  border-radius: 4px;
  background: var(--bg);
  color: var(--muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s;
}
.code-block:hover .copy-btn,
.copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.3rem 0.5rem;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--muted);
  transition: color 0.15s, border-color 0.15s;
  min-width: 2.2rem;
  min-height: 2.0rem;
}
.theme-toggle:hover {
  color: var(--fg);
  border-color: var(--muted);
}

hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.95em;
}
th, td {
  padding: 0.55rem 0.9rem;
  text-align: left;
  border: 1px solid var(--table-border);
}
thead:not(:has(th:not(:empty))) { display: none; }
th {
  background: var(--table-header-bg);
  font-weight: 600;
}
tr:nth-child(even) td {
  background: var(--table-stripe);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.25rem 0;
}
.post-list { list-style: none; padding: 0; }
.post-list li {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
}
.post-list .date {
  color: var(--muted);
  font-size: 0.85rem;
}
.post-list a {
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
}
.post-list a:hover { text-decoration: underline; }
.post-list p { margin: 0.2rem 0 0; color: var(--muted); }

.codehilite .hll { background-color: #ffffcc }
.codehilite { background: #f8f8f8; }
.codehilite .c { color: #3D7B7B; font-style: italic }
.codehilite .k { color: #008000; font-weight: bold }
.codehilite .o { color: #666 }
.codehilite .ch { color: #3D7B7B; font-style: italic }
.codehilite .cm { color: #3D7B7B; font-style: italic }
.codehilite .cp { color: #9C6500 }
.codehilite .cpf { color: #3D7B7B; font-style: italic }
.codehilite .c1 { color: #3D7B7B; font-style: italic }
.codehilite .cs { color: #3D7B7B; font-style: italic }
.codehilite .gd { color: #A00000 }
.codehilite .ge { font-style: italic }
.codehilite .gr { color: #E40000 }
.codehilite .gh { color: #000080; font-weight: bold }
.codehilite .gi { color: #008400 }
.codehilite .go { color: #717171 }
.codehilite .gp { color: #000080; font-weight: bold }
.codehilite .gs { font-weight: bold }
.codehilite .gu { color: #800080; font-weight: bold }
.codehilite .gt { color: #04D }
.codehilite .kc { color: #008000; font-weight: bold }
.codehilite .kd { color: #008000; font-weight: bold }
.codehilite .kn { color: #008000; font-weight: bold }
.codehilite .kp { color: #008000 }
.codehilite .kr { color: #008000; font-weight: bold }
.codehilite .kt { color: #B00040 }
.codehilite .m { color: #666 }
.codehilite .s { color: #BA2121 }
.codehilite .na { color: #687822 }
.codehilite .nb { color: #008000 }
.codehilite .nc { color: #00F; font-weight: bold }
.codehilite .no { color: #800 }
.codehilite .nd { color: #A2F }
.codehilite .ni { color: #717171; font-weight: bold }
.codehilite .ne { color: #CB3F38; font-weight: bold }
.codehilite .nf { color: #00F }
.codehilite .nl { color: #767600 }
.codehilite .nn { color: #00F; font-weight: bold }
.codehilite .nt { color: #008000; font-weight: bold }
.codehilite .nv { color: #19177C }
.codehilite .ow { color: #A2F; font-weight: bold }
.codehilite .w { color: #BBB }
.codehilite .mb { color: #666 }
.codehilite .mf { color: #666 }
.codehilite .mh { color: #666 }
.codehilite .mi { color: #666 }
.codehilite .mo { color: #666 }
.codehilite .sa { color: #BA2121 }
.codehilite .sb { color: #BA2121 }
.codehilite .sc { color: #BA2121 }
.codehilite .dl { color: #BA2121 }
.codehilite .sd { color: #BA2121; font-style: italic }
.codehilite .s2 { color: #BA2121 }
.codehilite .se { color: #AA5D1F; font-weight: bold }
.codehilite .sh { color: #BA2121 }
.codehilite .si { color: #A45A77; font-weight: bold }
.codehilite .sx { color: #008000 }
.codehilite .sr { color: #A45A77 }
.codehilite .s1 { color: #BA2121 }
.codehilite .ss { color: #19177C }
.codehilite .bp { color: #008000 }
.codehilite .fm { color: #00F }
.codehilite .vc { color: #19177C }
.codehilite .vg { color: #19177C }
.codehilite .vi { color: #19177C }
.codehilite .vm { color: #19177C }
.codehilite .il { color: #666 }
@media (prefers-color-scheme: dark) {
  .codehilite { background: #1e1e1e; }
  .codehilite .c, .codehilite .c1, .codehilite .cm, .codehilite .cs,
  .codehilite .ch, .codehilite .cpf { color: #6a9955; font-style: italic }
  .codehilite .k, .codehilite .kc, .codehilite .kd, .codehilite .kn,
  .codehilite .kr, .codehilite .kt, .codehilite .no { color: #569cd6 }
  .codehilite .s, .codehilite .s1, .codehilite .s2, .codehilite .sb,
  .codehilite .sc, .codehilite .sh, .codehilite .sa, .codehilite .dl { color: #ce9178 }
  .codehilite .m, .codehilite .mi, .codehilite .mf, .codehilite .mh,
  .codehilite .mo, .codehilite .mb, .codehilite .il { color: #b5cea8 }
  .codehilite .nc, .codehilite .nf, .codehilite .nn, .codehilite .nb,
  .codehilite .bp, .codehilite .fm { color: #dcdcaa }
  .codehilite .nt { color: #569cd6 }
  .codehilite .nv, .codehilite .vc, .codehilite .vg, .codehilite .vi,
  .codehilite .vm { color: #9cdcfe }
  .codehilite .ne { color: #f44747 }
  .codehilite .gh { color: #dcdcaa }
  .codehilite .gp { color: #569cd6 }
  .codehilite .go { color: #808080 }
  .codehilite .w { color: #808080 }
}
html[data-theme="dark"] .codehilite { background: #1e1e1e; }
html[data-theme="dark"] .codehilite .c,
html[data-theme="dark"] .codehilite .c1,
html[data-theme="dark"] .codehilite .cm,
html[data-theme="dark"] .codehilite .cs,
html[data-theme="dark"] .codehilite .ch,
html[data-theme="dark"] .codehilite .cpf { color: #6a9955; font-style: italic }
html[data-theme="dark"] .codehilite .k,
html[data-theme="dark"] .codehilite .kc,
html[data-theme="dark"] .codehilite .kd,
html[data-theme="dark"] .codehilite .kn,
html[data-theme="dark"] .codehilite .kr,
html[data-theme="dark"] .codehilite .kt,
html[data-theme="dark"] .codehilite .no { color: #569cd6 }
html[data-theme="dark"] .codehilite .s,
html[data-theme="dark"] .codehilite .s1,
html[data-theme="dark"] .codehilite .s2,
html[data-theme="dark"] .codehilite .sb,
html[data-theme="dark"] .codehilite .sc,
html[data-theme="dark"] .codehilite .sh,
html[data-theme="dark"] .codehilite .sa,
html[data-theme="dark"] .codehilite .dl { color: #ce9178 }
html[data-theme="dark"] .codehilite .m,
html[data-theme="dark"] .codehilite .mi,
html[data-theme="dark"] .codehilite .mf,
html[data-theme="dark"] .codehilite .mh,
html[data-theme="dark"] .codehilite .mo,
html[data-theme="dark"] .codehilite .mb,
html[data-theme="dark"] .codehilite .il { color: #b5cea8 }
html[data-theme="dark"] .codehilite .nc,
html[data-theme="dark"] .codehilite .nf,
html[data-theme="dark"] .codehilite .nn,
html[data-theme="dark"] .codehilite .nb,
html[data-theme="dark"] .codehilite .bp,
html[data-theme="dark"] .codehilite .fm { color: #dcdcaa }
html[data-theme="dark"] .codehilite .nt { color: #569cd6 }
html[data-theme="dark"] .codehilite .nv,
html[data-theme="dark"] .codehilite .vc,
html[data-theme="dark"] .codehilite .vg,
html[data-theme="dark"] .codehilite .vi,
html[data-theme="dark"] .codehilite .vm { color: #9cdcfe }
html[data-theme="dark"] .codehilite .ne { color: #f44747 }
html[data-theme="dark"] .codehilite .gh { color: #dcdcaa }
html[data-theme="dark"] .codehilite .gp { color: #569cd6 }
html[data-theme="dark"] .codehilite .go { color: #808080 }
html[data-theme="dark"] .codehilite .w { color: #808080 }

html[data-theme="light"] .codehilite { background: #f8f8f8; }
html[data-theme="light"] .codehilite .c,
html[data-theme="light"] .codehilite .c1,
html[data-theme="light"] .codehilite .cm,
html[data-theme="light"] .codehilite .cs,
html[data-theme="light"] .codehilite .ch,
html[data-theme="light"] .codehilite .cpf { color: #3D7B7B; font-style: italic }
html[data-theme="light"] .codehilite .k,
html[data-theme="light"] .codehilite .kc,
html[data-theme="light"] .codehilite .kd,
html[data-theme="light"] .codehilite .kn,
html[data-theme="light"] .codehilite .kr { color: #008000; font-weight: bold }
html[data-theme="light"] .codehilite .kt { color: #B00040 }
html[data-theme="light"] .codehilite .s,
html[data-theme="light"] .codehilite .s1,
html[data-theme="light"] .codehilite .s2,
html[data-theme="light"] .codehilite .sb,
html[data-theme="light"] .codehilite .sc,
html[data-theme="light"] .codehilite .sh,
html[data-theme="light"] .codehilite .sa,
html[data-theme="light"] .codehilite .dl { color: #BA2121 }
html[data-theme="light"] .codehilite .m,
html[data-theme="light"] .codehilite .mi,
html[data-theme="light"] .codehilite .mf,
html[data-theme="light"] .codehilite .mh,
html[data-theme="light"] .codehilite .mo,
html[data-theme="light"] .codehilite .mb,
html[data-theme="light"] .codehilite .il { color: #666 }
html[data-theme="light"] .codehilite .nc,
html[data-theme="light"] .codehilite .nf,
html[data-theme="light"] .codehilite .nn,
html[data-theme="light"] .codehilite .fm { color: #00F }
html[data-theme="light"] .codehilite .nb,
html[data-theme="light"] .codehilite .bp { color: #008000 }
html[data-theme="light"] .codehilite .nt { color: #008000; font-weight: bold }
html[data-theme="light"] .codehilite .nv,
html[data-theme="light"] .codehilite .vc,
html[data-theme="light"] .codehilite .vg,
html[data-theme="light"] .codehilite .vi,
html[data-theme="light"] .codehilite .vm { color: #19177C }
html[data-theme="light"] .codehilite .ne { color: #CB3F38; font-weight: bold }
html[data-theme="light"] .codehilite .gh,
html[data-theme="light"] .codehilite .gp { color: #000080; font-weight: bold }
html[data-theme="light"] .codehilite .go { color: #717171 }
html[data-theme="light"] .codehilite .w { color: #BBB }
html[data-theme="light"] .codehilite .no { color: #800 }
html[data-theme="light"] .codehilite .nd { color: #A2F }
html[data-theme="light"] .codehilite .ni { color: #717171; font-weight: bold }
html[data-theme="light"] .codehilite .ow { color: #A2F; font-weight: bold }
html[data-theme="light"] .codehilite .cp { color: #9C6500 }
html[data-theme="light"] .codehilite .gd { color: #A00000 }
html[data-theme="light"] .codehilite .gi { color: #008400 }
html[data-theme="light"] .codehilite .gu { color: #800080; font-weight: bold }
html[data-theme="light"] .codehilite .gs { font-weight: bold }
html[data-theme="light"] .codehilite .ge { font-style: italic }
html[data-theme="light"] .codehilite .gr { color: #E40000 }
html[data-theme="light"] .codehilite .gt { color: #04D }
html[data-theme="light"] .codehilite .na { color: #687822 }
html[data-theme="light"] .codehilite .nl { color: #767600 }
html[data-theme="light"] .codehilite .se { color: #AA5D1F; font-weight: bold }
html[data-theme="light"] .codehilite .si { color: #A45A77; font-weight: bold }
html[data-theme="light"] .codehilite .sx { color: #008000 }
html[data-theme="light"] .codehilite .sr { color: #A45A77 }
html[data-theme="light"] .codehilite .ss { color: #19177C }
html[data-theme="light"] .codehilite .sd { color: #BA2121; font-style: italic }
html[data-theme="light"] .codehilite .o { color: #666 }