@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,600&family=Inter:wght@400;500;600&display=swap');

:root {
  --bg: #fafaf8;
  --text: #1f2933;
  --muted: #5b6573;
  --accent: #2b6777;
  --accent-soft: #e4eef0;
  --gold: #b8945a;
  --line: #e3e1db;
  --max-width: 760px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

.wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text);
}

h1 { font-size: 2.1rem; margin-bottom: .3em; }
h2 { font-size: 1.5rem; margin-top: 2em; }
h3 { font-size: 1.15rem; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

p { margin: 0 0 1.1em; }

/* --- header / nav --- */
.site-header {
  border-bottom: 1px solid var(--line);
  padding: 22px 0;
}
.site-header .wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.site-title {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--text);
}
.site-title:hover { text-decoration: none; color: var(--accent); }
.site-nav { display: flex; gap: 20px; flex-wrap: wrap; }
.nav-link {
  font-size: .92rem;
  color: var(--muted);
  font-weight: 500;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
.nav-link:hover {
  color: var(--accent);
  text-decoration: none;
  border-bottom-color: var(--gold);
}

/* --- signature element: tick-rule under page titles, a nod to axis ticks --- */
.page-title-block { margin: 40px 0 28px; }
.tick-rule {
  display: block;
  width: 100%;
  height: 10px;
  margin-top: 10px;
  background-image: repeating-linear-gradient(
    to right,
    var(--accent) 0,
    var(--accent) 1px,
    transparent 1px,
    transparent 14px
  );
  background-position: bottom;
  background-size: 100% 1px;
  background-repeat: repeat-x;
  position: relative;
}
.tick-rule::before {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: var(--line);
}

/* --- main content --- */
.page-content { padding: 6px 0 60px; }

ul.research-list, ul.course-list { list-style: none; padding: 0; margin: 0; }
ul.research-list li, ul.course-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
ul.research-list li:first-child, ul.course-list li:first-child { border-top: 1px solid var(--line); }

.tag {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .03em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 3px 9px;
  border-radius: 3px;
  margin-bottom: 6px;
}

.button {
  display: inline-block;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 9px 18px;
  border-radius: 4px;
  font-size: .92rem;
  font-weight: 500;
}
.button:hover {
  background: var(--accent);
  color: #fff;
  text-decoration: none;
}

/* --- footer --- */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding: 24px 0;
  color: var(--muted);
  font-size: .85rem;
}

/* --- responsive --- */
@media (max-width: 600px) {
  .site-header .wrapper { flex-direction: column; align-items: flex-start; }
  h1 { font-size: 1.7rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}