:root {
  --bg: #fbfaf7;
  --ink: #1c1b19;
  --muted: #6f6b64;
  --accent: #9a6a4f;
  --rule: #d8d2c7;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16150f;
    --ink: #ece7dd;
    --muted: #a49e92;
    --accent: #c99a7c;
    --rule: #2b2920;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

/* ---------- Shared header ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1.5rem;
  padding: 1.6rem 2.2rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--ink);
  transition: color 0.15s ease;
}
.brand:hover { color: var(--accent); }
.brand svg { width: 23px; height: 23px; display: block; }
.navlinks { display: flex; gap: 2rem; }
.navlinks a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  transition: color 0.15s ease;
}
.navlinks a:hover { color: var(--accent); }
.navlinks a.active { color: var(--ink); }

/* ---------- Serif display type ---------- */
.name {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 600;
  font-size: clamp(2.4rem, 4.6vw, 3.4rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 0.6rem;
}
.title { font-size: 1.05rem; color: var(--muted); margin: 0 0 2rem; }
.title .org { color: var(--accent); }
.divider { width: 40px; height: 1px; background: var(--rule); border: 0; margin: 0 0 2rem; }
.bio { font-size: 1.08rem; margin: 0 0 2.2rem; text-wrap: pretty; }

/* ---------- Social / contact icons ---------- */
.icons { display: flex; gap: 1.4rem; }
.icons a {
  color: var(--muted);
  display: inline-flex;
  transition: color 0.15s ease, transform 0.15s ease;
}
.icons a:hover { color: var(--accent); transform: translateY(-2px); }
.icons svg { width: 22px; height: 22px; display: block; }

/* =====================================================
   HOME  (index.html)
   ===================================================== */
.page {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
}
.home-left {
  display: flex;
  flex-direction: column;
  padding: 0 2.2rem 1.6rem;
}
.home-left .topbar { padding-left: 0; padding-right: 0; justify-content: flex-start; }
.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 440px;
  margin: 0 auto;
  padding: 4vh 0 8vh;
}
.home-right {
  position: relative;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3vh 1.5rem;
  overflow: hidden;
}
.home-right figure {
  margin: 0;
  display: block;
  width: fit-content;
  max-width: 100%;
}
.home-right img {
  max-width: 100%;
  max-height: 75vh;
  object-fit: contain;
  display: block;
}
.caption {
  /* width:0 + min-width:100% locks the caption to the image's width */
  width: 0;
  min-width: 100%;
  box-sizing: border-box;
  margin: 0.85rem 0 0;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--muted);
  letter-spacing: 0.01em;
}
.caption .date { display: block; margin-top: 0.15rem; opacity: 0.75; }
.caption a {
  color: var(--muted);
  text-decoration: underline;
  text-decoration-color: var(--rule);
  text-underline-offset: 2px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}
.caption a:hover { color: var(--accent); text-decoration-color: var(--accent); }

@media (max-width: 760px) {
  .page { grid-template-columns: 1fr; }
  .home-right { order: 2; min-height: 60vh; }
  .hero { padding: 6vh 0 4vh; }
}

/* =====================================================
   ABOUT  (about.html)
   ===================================================== */
.about-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2vh 2.2rem 12vh;
}
.intro {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2.2rem;
  align-items: center;
  margin: 2vh 0 3rem;
}
.portrait {
  width: 200px;
  height: auto;
  aspect-ratio: 1156 / 1444;
  object-fit: cover;
  border-radius: 12px;
  display: block;
}
.intro .name { font-size: clamp(2rem, 4vw, 2.6rem); margin-bottom: 0.5rem; }
.intro .title { margin-bottom: 1.3rem; }

.prose { font-size: 1.06rem; }
.prose p { margin: 0 0 1.25rem; text-wrap: pretty; }
.prose a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}
.prose a:hover { color: var(--accent); }
.prose em { font-style: italic; }

.meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--rule);
}
.section-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin: 0 0 1rem;
  font-weight: 600;
}
.edu-list, .interest-list { list-style: none; margin: 0; padding: 0; }
.edu-list li { margin-bottom: 1rem; }
.edu-list .course { display: block; font-size: 0.98rem; }
.edu-list .inst { display: block; font-size: 0.9rem; color: var(--muted); }
.edu-list .year { font-size: 0.85rem; color: var(--muted); opacity: 0.8; }
.interest-list li {
  font-size: 0.98rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--rule);
}
.interest-list li:last-child { border-bottom: 0; }

@media (max-width: 620px) {
  .intro { grid-template-columns: 1fr; gap: 1.4rem; justify-items: start; }
  .portrait { width: 150px; }
  .meta { grid-template-columns: 1fr; gap: 2.2rem; }
}

/* =====================================================
   RESEARCH  (research.html)
   ===================================================== */
.page-title { margin: 2vh 0 2.5rem; }
.rgroup { margin-bottom: 3rem; }
.rgroup-title {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 600;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  margin: 0 0 1.2rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule);
}
.paper-list { list-style: none; margin: 0; padding: 0; }
.paper { margin-bottom: 1.5rem; }
.paper:last-child { margin-bottom: 0; }
.paper-title { display: block; font-size: 1.05rem; line-height: 1.45; }
.paper-title a {
  text-decoration: none;
  color: inherit;
  transition: color 0.15s ease;
}
.paper-title a:hover { color: var(--accent); }
.paper-meta { display: block; font-size: 0.85rem; color: var(--muted); margin-top: 0.28rem; }
.paper-meta .status { color: var(--accent); }
.award-list { list-style: none; margin: 0.5rem 0 0 1.4rem; padding: 0; }
.award-list li {
  position: relative;
  padding-left: 1.05rem;
  margin-top: 0.2rem;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--muted);
}
.award-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.badge {
  display: inline-block;
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 0.1rem 0.55rem;
  margin-left: 0.55rem;
  vertical-align: middle;
  white-space: nowrap;
}