/* musaorak.com — one stylesheet, no build step.
   Colors are tokens on :root; dark mode follows the system setting. */
:root {
  --bg: #fbfaf7;
  --fg: #1e1e1c;
  --muted: #605f5a;
  --rule: #e4e1d9;
  --accent: #1f4e79;
  --pill: #f0ede6;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15171a;
    --fg: #e8e6e1;
    --muted: #a5a49d;
    --rule: #2d3137;
    --accent: #86b7e8;
    --pill: #22262b;
  }
}
:root[data-theme="dark"] {
  --bg: #15171a; --fg: #e8e6e1; --muted: #a5a49d; --rule: #2d3137; --accent: #86b7e8; --pill: #22262b;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 var(--sans);
}
a { color: var(--accent); text-decoration: none; text-underline-offset: 3px; }
a:hover, a:focus-visible { text-decoration: underline; }
.wrap { max-width: 46rem; margin: 0 auto; padding: 0 16px; }

/* Header and navigation */
header.site { border-bottom: 1px solid var(--rule); }
header.site .wrap {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: .75rem 1.5rem; flex-wrap: wrap; padding-top: 1.1rem; padding-bottom: 1.1rem;
}
.brand { font-family: var(--serif); font-size: 1.35rem; font-weight: 600; color: var(--fg); }
nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 1.25rem; flex-wrap: wrap; }
nav a { color: var(--muted); font-size: .95rem; }
nav a[aria-current="page"] { color: var(--fg); border-bottom: 2px solid var(--accent); padding-bottom: 2px; }

/* Content */
main { padding: 2.5rem 0 3rem; }
h1, h2, h3 { font-family: var(--serif); line-height: 1.25; margin: 0 0 .5rem; font-weight: 600; }
h1 { font-size: 2.1rem; }
h2 { font-size: 1.45rem; margin-top: 2.75rem; padding-bottom: .35rem; border-bottom: 1px solid var(--rule); }
main > h2:first-child, section > h2:first-child { margin-top: 0; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1rem; }
.lede { font-size: 1.05rem; color: var(--muted); margin-bottom: 1.5rem; }
.muted { color: var(--muted); }
.small { font-size: .9rem; }

/* About page layout */
.about { display: grid; grid-template-columns: 1fr 260px; gap: 2rem; align-items: start; }
.portrait { margin: 0; }
.portrait img { width: 100%; height: auto; border-radius: 8px; display: block; }
.portrait figcaption { font-size: .8rem; color: var(--muted); margin-top: .4rem; line-height: 1.4; }
@media (max-width: 600px) {
  .about { grid-template-columns: 1fr; }
  .portrait { max-width: 260px; }
}
.links { list-style: none; padding: 0; margin: 1.25rem 0 0; display: flex; flex-wrap: wrap; gap: .5rem .6rem; }
.links a, .pub-links a {
  display: inline-block; font-size: .85rem; background: var(--pill);
  padding: .2rem .7rem; border-radius: 999px; color: var(--accent);
}
.links a:hover, .pub-links a:hover { text-decoration: none; filter: brightness(.95); }

/* Research page */
.toc { display: flex; flex-wrap: wrap; gap: .4rem 1.1rem; margin: 0 0 .5rem; padding: 0; list-style: none; font-size: .95rem; }
.pub { margin: 1.6rem 0; padding-left: 1rem; border-left: 3px solid var(--rule); }
.pub-title { margin-bottom: .15rem; }
.pub-meta { margin: 0 0 .5rem; color: var(--muted); font-size: .95rem; }
.pub-meta .me { color: var(--fg); }
.pub-links { margin: 0; display: flex; flex-wrap: wrap; gap: .4rem; }
details.abstract { margin-top: .55rem; }
details.abstract summary { cursor: pointer; color: var(--muted); font-size: .9rem; }
details.abstract p { margin: .5rem 0 0; font-size: .95rem; }

/* Teaching page */
.courses { margin: 0 0 1rem; padding-left: 1.2rem; }
.courses li { margin: .25rem 0; }

/* Footer */
footer.site { border-top: 1px solid var(--rule); padding: 1.5rem 0 2.5rem; color: var(--muted); font-size: .85rem; }
footer.site p { margin: 0 0 .5rem; }

@media print {
  header.site nav, footer.site { display: none; }
  details.abstract { display: none; }
  a { color: inherit; }
}