:root {
  --max-width: 900px;

  color-scheme: light;
  --bg: #ffffff;
  --bg-raised: #f1f4f8;
  --text: #242d3b;
  --text-strong: #101827;
  --muted: #526174;
  --rule: #cbd3df;
  --heading: #101827;
  --accent: #b33c0c;
  --link: #a9360a;
  --link-hover: #7c2606;
  --syntax-keyword: #a9360a;
  --syntax-string: #236331;
  --syntax-comment: #526174;
  --syntax-name: #713a87;
  --syntax-number: #6040a0;
  --syntax-punctuation: #39485b;
  --syntax-decorator: #006477;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #10161f;
  --bg-raised: #1b2533;
  --text: #e4e9f0;
  --text-strong: #ffffff;
  --muted: #acb8c8;
  --rule: #3e4d61;
  --heading: #f6e7ce;
  --accent: #ffa477;
  --link: #ffb58f;
  --link-hover: #ffdbc7;
  --syntax-keyword: #ffb58f;
  --syntax-string: #b3e3a8;
  --syntax-comment: #acb8c8;
  --syntax-name: #f6e7ce;
  --syntax-number: #d1bfff;
  --syntax-punctuation: #cad3df;
  --syntax-decorator: #9bdcf7;
}

* { box-sizing: border-box; }

html { font-size: 17px; -webkit-text-size-adjust: 100%; background: var(--bg); }

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ---- header / footer -------------------------------------------------- */

.site-header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 28px 16px 12px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  justify-self: start;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-strong);
  text-decoration: none;
}
.brand img { width: 34px; height: 34px; margin: 0; border-radius: 8px; }
.brand:hover { color: var(--heading); }

.site-header nav { display: flex; gap: 20px; }
.site-header nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
}
.site-header nav a:hover { color: var(--text-strong); text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 4px; }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid var(--muted);
  border-radius: 50%;
  color: var(--text-strong);
  background: var(--bg-raised);
  cursor: pointer;
}
.theme-toggle[hidden] { display: none; }
.theme-toggle:hover { color: var(--link); border-color: var(--link); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--link); outline-offset: 4px; }
.theme-toggle svg { width: 22px; height: 22px; }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

@media (max-width: 600px) {
  .site-header { grid-template-columns: 1fr auto; gap: 12px; }
  .site-header nav { grid-column: 1 / -1; grid-row: 2; }
  .theme-toggle { grid-column: 2; grid-row: 1; }
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 16px 64px;
}

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 16px 48px;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9rem;
}
.site-footer a { color: var(--muted); margin-left: 8px; }
.site-footer a:hover { color: var(--link); }

/* ---- typography --------------------------------------------------------- */

h1, h2, h3, h4 { line-height: 1.25; letter-spacing: -0.01em; color: var(--heading); }
h1 { font-size: 2rem; margin: 0.4em 0 0.5em; }
h2 { font-size: 1.45rem; margin: 1.7em 0 0.5em; }
h3 { font-size: 1.15rem; margin: 1.4em 0 0.4em; }

a {
  color: var(--link);
  text-decoration-line: underline;
  text-decoration-style: dashed;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--link-hover); text-decoration-color: var(--accent); }
hr { border: 0; border-top: 1px solid var(--rule); margin: 1.5em 0; }

p, ul, ol { margin: 0 0 1.1em; }
strong { color: var(--text-strong); }
em { color: var(--text); }
img, video { max-width: 100%; height: auto; display: block; margin: 1.2em auto; border-radius: 6px; }
figure { margin: 1.6em 0; }
figure img { margin-bottom: 0.6em; }
figcaption { color: var(--muted); font-size: 0.9rem; line-height: 1.5; }

blockquote {
  margin: 1.2em 0;
  padding: 0.3em 1em;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.2em 0;
  font-size: 0.92rem;
  display: block;
  overflow-x: auto;        /* wide result tables scroll instead of overflowing */
}
th, td { padding: 7px 10px; border-bottom: 1px solid var(--rule); text-align: left; white-space: nowrap; }
th { font-weight: 600; color: var(--heading); background: var(--bg-raised); }
table + p > em { display: block; color: var(--muted); font-size: 0.9rem; margin-top: -0.4em; }  /* table captions */

/* Prose-heavy comparison tables should fit the article width. */
.wrap-tables table { display: table; table-layout: fixed; overflow-x: visible; }
.wrap-tables th, .wrap-tables td {
  white-space: normal;
  overflow-wrap: anywhere;
  vertical-align: top;
}
.wrap-tables th:first-child, .wrap-tables td:first-child { width: 25%; }

/* ---- code --------------------------------------------------------------- */

code, pre { font-family: var(--mono); font-size: 0.88em; }
code { background: var(--bg-raised); padding: 0.15em 0.4em; border-radius: 4px; color: var(--text-strong); }
pre {
  background: var(--bg-raised);
  border: 1px solid var(--rule);
  padding: 14px 16px;
  border-radius: 8px;
  overflow-x: auto;
  line-height: 1.45;
  margin: 1.2em 0;
}
pre code { background: none; padding: 0; color: inherit; }

/* Rouge syntax colors follow the selected theme. */
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kr { color: var(--syntax-keyword); }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb { color: var(--syntax-string); }
.highlight .c, .highlight .c1, .highlight .cm { color: var(--syntax-comment); font-style: italic; }
.highlight .nf, .highlight .nc, .highlight .nn { color: var(--syntax-name); }
.highlight .mi, .highlight .mf, .highlight .m { color: var(--syntax-number); }
.highlight .o, .highlight .p { color: var(--syntax-punctuation); }
.highlight .nd { color: var(--syntax-decorator); }

/* ---- post list (blog index) ------------------------------------------- */

.post-list { list-style: none; padding: 0; margin: 0; }
.post-list li { margin: 0 0 2.2em; }
.post-list h2 { margin: 0 0 0.2em; font-size: 1.35rem; }
.post-list h2 a { color: var(--heading); text-decoration: none; }
.post-list h2 a:hover { color: var(--text-strong); text-decoration: underline; text-decoration-color: var(--accent); }
.post-list .thumb { max-height: 280px; margin: 0.9em 0 0; }
.post-list .thumb-large { width: 100%; max-width: 710px; max-height: none; height: auto; }

.post-list.compact li { margin: 0 0 0.5em; }
.post-list.compact .meta { margin-left: 8px; }

.meta { color: var(--muted); font-size: 0.95rem; margin: 0; }
.meta a { color: var(--muted); text-decoration: none; }
.meta a:hover { color: var(--link); text-decoration: none; }
.meta .crosspost { color: var(--accent); text-decoration: none; }
.meta .crosspost:hover { color: var(--link); }

/* ---- single post -------------------------------------------------------- */

.post-header { margin-bottom: 2em; }
.post-header h1 { margin-bottom: 0.3em; }
.tldr { margin-top: 1em; font-style: italic; color: var(--muted); }

.pill {
  display: inline-block;
  padding: 3px 12px;
  margin: 6px 6px 0 0;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--text);
  background: var(--bg-raised);
}
.pill:hover { border-color: var(--accent); color: var(--link-hover); }

.footnote { color: var(--muted); font-size: 0.9rem; margin-top: 2em; }

/* MathJax display equations can be wide; let them scroll instead of overflow */
mjx-container[display="true"] { overflow-x: auto; overflow-y: hidden; }