:root {
  font-family: system-ui, sans-serif;
  color: #202b38;
  background: #fff;
  line-height: 1.65;
}
* { box-sizing: border-box; }
body { max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; }
a { color: #235d98; text-underline-offset: 0.2em; }
a:hover { color: #153859; }
a:focus-visible { outline: 3px solid #235d98; outline-offset: 4px; border-radius: 3px; }
.site-header { border-bottom: 1px solid #dce2e8; padding-bottom: 1.5rem; }
h1, h2, h3 { line-height: 1.25; }
h1 { font-size: clamp(2rem, 6vw, 2.8rem); margin-bottom: 0.5rem; }
.site-header h1, .site-name { font-size: clamp(2rem, 6vw, 2.8rem); line-height: 1.25; font-weight: 700; margin: 1.875rem 0 1.25rem; }
.site-name a { color: inherit; text-decoration: none; }
.site-header small { font-size: 0.48em; font-weight: 400; white-space: nowrap; }
nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; }
.site-header nav a { text-decoration: none; }
.site-header nav a:hover { text-decoration: underline; }
.site-header nav a[aria-current] { font-weight: 650; }
section { padding: 1.25rem 0; scroll-margin-top: 1rem; }
main > section { max-width: 760px; }
article { margin: 1rem 0; }
.muted, footer { color: #5a6572; }
.blog-layout {
  --sidebar-width: 200px;
  --sidebar-gap: 3rem;
  /* Use the left page margin for categories as space becomes available. */
  --sidebar-offset: clamp(0px, calc((100vw - 1100px) / 2), calc(var(--sidebar-width) + var(--sidebar-gap)));
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: var(--sidebar-gap);
  margin-left: calc(-1 * var(--sidebar-offset));
  padding-top: 2.5rem;
}
.blog-sidebar { align-self: start; position: sticky; top: 1.5rem; }
.blog-sidebar nav, .blog-sidebar ul { display: block; width: 100%; }
.blog-sidebar ul { list-style: none; padding: 0; margin: 0; }
.blog-sidebar li { margin: 0.25rem 0; }
.blog-sidebar a { display: flex; justify-content: space-between; gap: 1rem; align-items: center; padding: 0.6rem 0.75rem; border-radius: 6px; text-decoration: none; color: #465465; }
.blog-sidebar a:hover { background: #f4f6f8; }
.blog-sidebar a[aria-current] { color: #235d98; background: #eaf1f8; font-weight: 650; }
.category-count { font-size: 0.8rem; font-variant-numeric: tabular-nums; }
.blog-content { min-width: 0; padding: 0; }
.blog-heading { margin-bottom: 1.75rem; }
.blog-heading h1 { margin: 0.35rem 0 0.6rem; font-size: 2rem; }
.blog-heading p { margin: 0; }
.eyebrow { color: #52677d; font-size: 0.78rem; font-weight: 650; letter-spacing: 0.06em; text-transform: uppercase; }
.blog-cards { display: grid; gap: 1rem; }
.blog-card { margin: 0; border: 1px solid #dce2e8; border-radius: 10px; background: #fff; }
.blog-card:hover { border-color: #99b4cf; box-shadow: 0 4px 16px #202b380a; }
.blog-card-link { display: block; padding: 1.5rem; color: inherit; text-decoration: none; border-radius: inherit; }
.blog-card-link:hover { color: inherit; }
.blog-card h2 { font-size: 1.35rem; margin: 0.45rem 0 0.75rem; overflow-wrap: anywhere; }
.blog-excerpt { color: #5a6572; margin: 0; overflow-wrap: anywhere; }
.empty-state { border: 1px dashed #dce2e8; border-radius: 10px; padding: 2rem; color: #5a6572; margin: 0; }
.blog-article { max-width: 760px; margin: 0; overflow-wrap: anywhere; }
.blog-article > :first-child { margin-top: 0; }
.blog-article h2, .blog-article h3 { margin-top: 2rem; }
pre { padding: 1rem; background: #f4f6f8; overflow-x: auto; border-radius: 4px; }
code { font-size: 0.9em; }
:not(pre) > code { background: #f4f6f8; padding: 0.15rem 0.3rem; }
blockquote { margin-left: 0; padding-left: 1rem; border-left: 3px solid #ddd; }
table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; }
th, td { border: 1px solid #ddd; padding: 0.5rem 0.75rem; text-align: left; }
img { max-width: 100%; height: auto; }
.katex-display { overflow-x: auto; overflow-y: hidden; padding: 0.5rem 0; }
footer { border-top: 1px solid #dce2e8; margin-top: 3rem; padding-top: 1rem; font-size: 0.9rem; }
@media (max-width: 640px) {
  body { padding: 1rem; }
  .blog-layout { grid-template-columns: 1fr; gap: 1.5rem; margin-left: 0; padding-top: 1.5rem; }
  .blog-sidebar { position: static; }
  .blog-sidebar ul { display: flex; flex-wrap: wrap; gap: 0.35rem; }
  .blog-sidebar li { margin: 0; }
  .blog-sidebar a { gap: 0.6rem; padding: 0.4rem 0.65rem; }
  .blog-card-link { padding: 1.25rem; }
}