:root {
  --notes-ink: #253338;
  --notes-muted: #6b777c;
  --notes-accent: #246b63;
  --notes-rule: #e5e9e6;
}

body {
  color: var(--notes-ink);
  background: #fdfdfb;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--notes-accent); text-underline-offset: 4px; }
a:hover { color: #174c46; }
.navbar { background: #fdfdfb !important; border-bottom: 1px solid var(--notes-rule); padding-block: 14px; }
.navbar-brand { font-size: 1.2rem; font-weight: 650; letter-spacing: .04em; }
.navbar .nav-link { font-size: .94rem; color: var(--notes-muted); }
.navbar .nav-link.active { color: var(--notes-accent); }
main.content { padding-top: 2.5rem; padding-bottom: 3rem; min-width: 0; }
h1, h2, h3 { color: #203136; line-height: 1.45; font-weight: 650; }
h1 { letter-spacing: -.025em; }
h2 { font-size: 1.45rem; margin-top: 2.7rem; border-bottom-color: var(--notes-rule); padding-bottom: .55rem; }
h3 { font-size: 1.14rem; margin-top: 1.9rem; }
p { margin-bottom: 1.15rem; }
strong { font-weight: 650; }

.home-intro { padding: 2.5rem 0 2.8rem; max-width: 760px; }
body:has(.home-intro) #title-block-header { display: none; }
.eyebrow { color: var(--notes-accent); font-size: .73rem; font-weight: 650; letter-spacing: .16em; margin-bottom: .9rem; }
.eyebrow p { margin-bottom: 0; }
.home-intro h1 { font-size: clamp(2rem, 4vw, 2.9rem); margin: 0 0 1.3rem; }
.home-intro p { font-size: 1.05rem; }
.home-intro .intro-link { display: inline-block; font-size: .92rem; margin-top: .35rem; text-decoration: none; }
#notes { font-size: 1.2rem; margin-top: .5rem; }
.quarto-listing-default .quarto-post { border-bottom: 1px solid var(--notes-rule); padding-block: 1.5rem; margin-bottom: 0; gap: 1.5rem; }
.quarto-listing-default .quarto-post .thumbnail { display: none; }
.quarto-listing-default .quarto-post .metadata { color: var(--notes-muted); font-size: .8rem; flex-basis: 110px; }
.quarto-listing-default .quarto-post .body { flex: 1; min-width: 0; }
.quarto-listing-default .listing-title { font-size: 1.25rem; margin-top: 0; }
.quarto-listing-default .listing-title a { color: var(--notes-ink); text-decoration: none; }
.quarto-listing-default .listing-description { color: var(--notes-muted); font-size: .94rem; line-height: 1.75; }

#title-block-header { margin-bottom: 2.4rem; }
.quarto-title .title { font-size: clamp(1.9rem, 3.4vw, 2.55rem); }
.quarto-title .description { color: var(--notes-muted); margin-top: .8rem; font-size: 1rem; }
.quarto-title .quarto-categories { gap: .5rem; margin-top: 1rem; }
.quarto-title .quarto-category { border: 1px solid var(--notes-rule); border-radius: 4px; color: var(--notes-muted); font-size: .7rem; padding: .2rem .55rem; text-transform: none; }
.quarto-title-meta { font-size: .83rem; color: var(--notes-muted); }
#TOC { font-size: .8rem; line-height: 1.65; }
#TOC .nav-link { color: var(--notes-muted); }
#TOC .nav-link.active { color: var(--notes-accent); border-left-color: var(--notes-accent); }
.math.display { display: block; max-width: 100%; overflow-x: auto; overflow-y: hidden; padding: .25rem 0; }
mjx-container[display="true"] { margin: 1.15em 0 !important; }
.callout { border-radius: 4px; border-left-color: var(--notes-accent); margin-block: 1.5rem; }
.callout.callout-style-default > .callout-header { background: #eef4f1; }
.callout-body { font-size: .95rem; }
blockquote { border-left: 3px solid #b5cdc5; color: #4d6264; }
.nav-footer { color: var(--notes-muted); font-size: .78rem; border-top: 1px solid var(--notes-rule); }

@media (max-width: 767px) {
  body { font-size: 16px; line-height: 1.8; }
  main.content { padding-top: 1.5rem; }
  .home-intro { padding-top: 1.2rem; padding-bottom: 2rem; }
  .quarto-listing-default .quarto-post { flex-direction: column; gap: .45rem; }
  .quarto-listing-default .quarto-post .metadata { flex-basis: auto; }
  h2 { font-size: 1.25rem; }
}