/* Homepage styles — warm academic theme */

:root {
  --heritage: #002d72;        /* JHU Heritage Blue: header, name, links */
  --spirit: #68ace5;          /* JHU Spirit Blue: underlines, rules */
  --accent: var(--heritage);
  --accent-soft: var(--spirit);
  --accent-wash: #eef5fc;     /* chips, pills */
  --accent-line: #c6ddf3;
  --ink: #0b1f3f;             /* headings, strong text */
  --text: #2f3a4a;            /* body */
  --muted: #64748b;           /* dates, meta */
  --tag: #1f5c99;             /* venues, small caps tags */
  --rule: #e2e8f0;
  --callout: var(--spirit);   /* contact box edge */
  --bg: #ffffff;
  --serif: "Newsreader", "Songti SC", STSong, "Noto Serif SC", ui-serif, Georgia, serif;
  --sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", ui-sans-serif, system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ---------- links ---------- */
a {
  color: var(--accent);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--accent-soft);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: text-decoration-color .15s, color .15s;
}
a:hover { text-decoration-color: var(--accent); }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--heritage);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 3px solid var(--spirit);
}
.site-header .inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  color: #fff;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}
.site-nav { display: flex; gap: 4px; overflow-x: auto; }
.site-nav a {
  color: rgba(255, 255, 255, .85);
  font-weight: 400;
  font-size: 15px;
  text-decoration: none;
  padding: 4px 12px;
  border-radius: 999px;
  white-space: nowrap;
}
.site-nav a:hover { background: rgba(255, 255, 255, .1); color: #fff; }
.site-nav a.active { background: rgba(104, 172, 229, .25); color: #fff; font-weight: 500; }

/* ---------- layout ---------- */
main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 28px 24px 48px;
}

/* top band gets a soft wash like the reference */
.hero-wash {
  background: linear-gradient(to bottom, #f3f7fc, rgba(255, 255, 255, 0) 320px);
}

/* ---------- profile ---------- */
.profile {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
}
.profile .photo {
  width: 240px;
  height: 240px;
  object-fit: cover;
  object-position: 50% 40%;
  border-radius: 4px;
  border: 1px solid var(--accent-line);
  box-shadow: 0 1px 3px rgba(0, 45, 114, .12);
  display: block;
}
.profile .meta {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}
.chip {
  display: inline-block;
  background: var(--accent-wash);
  color: var(--accent);
  border-radius: 4px;
  padding: 0 6px;
  font-size: 12.5px;
  white-space: nowrap;
}
h1 {
  font-family: var(--serif);
  color: var(--accent);
  font-size: 36px;
  line-height: 1.2;
  margin: 0 0 6px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.position {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 10px;
}
.position .sep { color: var(--muted); font-weight: 400; margin: 0 6px; }
.links-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 14px; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 500;
  text-decoration: none;
  color: var(--accent);
  background: var(--accent-wash);
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  padding: 2px 12px;
}
.pill:hover { background: #dcebf9; }
.pill svg { width: 14px; height: 14px; fill: currentColor; }
.bio { margin: 0 0 10px; font-size: 16.5px; }

/* social icons (brand colors); empty links stay hidden until filled in */
.social { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; margin: 2px 0 12px -4px; }
.social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  color: var(--heritage);
  font-size: 23px;
  line-height: 1;
  text-decoration: none;
  transition: background .15s, transform .15s;
}
.social a:hover { background: var(--accent-wash); transform: translateY(-1px); }
.social img, .social svg { width: 24px; height: 24px; object-fit: contain; }

/* left column under the photo: icons, citation stats, email */
.profile .social { width: 240px; margin: 12px 0 0 -2px; gap: 2px; }
.profile .social a { width: 28px; height: 28px; font-size: 19px; border-radius: 7px; }
.profile .social img, .profile .social svg { width: 20px; height: 20px; }
.scholar-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 240px;
  margin-top: 10px;
  border: 1px solid var(--accent-line);
  border-radius: 8px;
  background: #fff;
  text-decoration: none;
  overflow: hidden;
}
.scholar-stats:hover { border-color: var(--spirit); }
.scholar-stats .stat { display: flex; flex-direction: column; align-items: center; padding: 7px 4px 6px; }
.scholar-stats .stat + .stat { border-left: 1px solid var(--accent-line); }
.scholar-stats .stat-num { font-size: 19px; font-weight: 700; color: var(--heritage); line-height: 1.2; font-variant-numeric: tabular-nums; }
.scholar-stats .stat-label { font-size: 11.5px; font-weight: 500; color: var(--muted); letter-spacing: .02em; }

/* "Longer bio" click-to-expand */
details.bio-more { margin: 0 0 4px; font-size: 14.5px; }
details.bio-more > summary {
  display: inline-block;
  cursor: pointer;
  list-style: none;
  color: var(--accent);
  font-weight: 500;
}
details.bio-more > summary::-webkit-details-marker { display: none; }
details.bio-more > summary::before { content: "▸ "; color: var(--muted); }
details.bio-more[open] > summary::before { content: "▾ "; }
details.bio-more .short-bio {
  margin: 8px 0 0;
  padding: 10px 14px;
  background: #f3f8fd;
  border-left: 3px solid var(--spirit);
  border-radius: 0 6px 6px 0;
  font-size: 14.5px;
}
details.bio-more .short-bio + .short-bio { margin-top: 0; padding-top: 0; }

/* ---------- callouts ---------- */
.callout {
  margin: 22px 0 0;
  padding: 10px 16px;
  border-left: 3px solid var(--accent-soft);
  background: #f3f8fd;
  border-radius: 0 6px 6px 0;
  font-size: 15px;
}
.callout.green { border-left-color: var(--callout); background: #f3f8fd; }
.callout p { margin: 4px 0; }
.callout ul { margin: 4px 0 2px; padding-left: 20px; }
.callout li { margin: 3px 0; }
.callout strong { color: var(--ink); }

/* ---------- sections ---------- */
section { margin-top: 44px; }
h2 {
  font-family: var(--serif);
  color: var(--ink);
  font-size: 25px;
  font-weight: 700;
  margin: 0 0 14px;
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}
h2 .emoji { display: none; }
section > h2 {
  color: var(--heritage);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule);
  position: relative;
}
section > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 48px;
  height: 3px;
  background: var(--spirit);
}
h2 .aside {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
}
h2 .right { margin-left: auto; font-family: var(--sans); font-size: 14px; font-weight: 500; }

ul.plain { margin: 0; padding-left: 18px; }
ul.plain li { margin: 5px 0; }
ul.plain li::marker { color: #9ca3af; }
.date { color: var(--muted); font-variant-numeric: tabular-nums; }
.year { color: var(--muted); }
.lead { font-size: 17px; margin: 0 0 16px; }

details.more { margin-top: 10px; }
details.more > summary {
  cursor: pointer;
  color: var(--text);
  font-weight: 500;
  list-style: none;
}
details.more > summary::-webkit-details-marker { display: none; }
details.more > summary::before { content: "▸ "; color: var(--muted); }
details.more[open] > summary::before { content: "▾ "; }
details.more > ul { margin-top: 8px; }

/* ---------- publications ---------- */
.topic { margin: 22px 0 6px; }
.topic-title {
  font-weight: 600;
  color: var(--accent);
  font-size: 16.5px;
  margin: 0 0 4px;
}
.pubs { list-style: none; margin: 0; padding: 0; }
.pubs li {
  padding: 8px 0 8px 14px;
  border-left: 2px solid var(--rule);
  margin: 0 0 6px;
}
.pubs li:hover { border-left-color: var(--accent-soft); }
.pub-title { font-weight: 600; color: var(--ink); }
.pub-authors { font-size: 14.5px; color: var(--text); }
.pub-authors .me { font-weight: 600; color: var(--ink); text-decoration: underline; text-decoration-color: var(--accent-soft); text-underline-offset: 3px; }
.pub-venue { font-size: 14px; color: var(--muted); }
.pub-venue .venue { color: var(--tag); font-weight: 600; letter-spacing: .02em; }
.pub-venue a { font-size: 13.5px; margin-left: 6px; }
.tag {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--tag);
  font-weight: 500;
  margin-left: 6px;
}
.note { font-size: 14px; color: var(--muted); margin: 0 0 6px; }

.award-hl { color: var(--accent); font-weight: 600; }

/* ---------- research themes ---------- */
.themes { list-style: none; margin: 0; padding: 0; }
.themes > li {
  padding: 0 0 0 14px;
  border-left: 3px solid var(--rule);
  margin: 0 0 13px;
  scroll-margin-top: 72px;
}
.themes > li:hover { border-left-color: var(--spirit); }
.themes p { margin: 0; }
.theme-head { display: inline; font-size: 16px; line-height: 1.45; }
.theme-label { color: var(--heritage); font-weight: 700; }
.theme-q { color: var(--ink); font-weight: 600; }
.tags {
  display: inline-block;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--tag);
  font-weight: 500;
  margin-left: 4px;
}
.theme-desc { margin: 2px 0 1px !important; font-size: 13.5px; line-height: 1.5; color: var(--text); }
.theme-see { font-size: 14.5px; color: var(--muted); line-height: 1.8; }
.theme-see a { font-weight: 500; }
.plain-cite { color: var(--text); font-weight: 500; }

.short-bio { margin: 0 0 10px; font-size: 15.5px; }

/* research: impact strip, sub-questions, paper chips */
.impact-line {
  margin: -6px 0 22px;
  padding: 10px 14px;
  background: var(--accent-wash);
  border-radius: 6px;
  font-size: 14px;
  color: var(--text);
}
.impact-num { font-weight: 700; color: var(--heritage); }
.impact-src { font-size: 12.5px; margin-left: 6px; }
.tags-line { display: inline; margin-left: 8px !important; }
.tags-line .tags { margin-left: 0; }
.subqs { list-style: none; margin: 2px 0 0; padding: 0; }
.subqs > li {
  padding: 2px 0 2px 12px;
  position: relative;
}
.subqs > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--spirit);
}
.subqs > li > p { display: inline; }
.subq { font-weight: 600; color: var(--ink); font-size: 13.5px; line-height: 1.5; margin-right: 7px; }
.subq-papers, .theme-papers { font-size: 12px; line-height: 1.5; color: var(--muted); }
.theme-papers { display: inline; margin-left: 8px !important; }
.paper { white-space: nowrap; }
.paper:not(:last-child)::after { content: "·"; margin: 0 5px; color: #b8c2d0; }
.paper .pn { font-weight: 500; color: var(--tag); text-decoration: none; }
.paper a.pn:hover { text-decoration: underline; text-decoration-color: var(--spirit); }
.paper .pv { color: #8a96a8; font-weight: 400; font-size: 11px; }
.badge {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1.6;
  padding: 0 7px;
  border-radius: 999px;
  vertical-align: 1px;
  margin-left: 2px;
}
.badge.award { background: #fdf3d0; color: #7a5a00; border: 1px solid #f1c400; }
.badge.cite { background: var(--accent-wash); color: var(--heritage); border: 1px solid var(--accent-line); }
@media (max-width: 720px) {
  .paper { white-space: normal; }
}

/* ---------- full publication list ---------- */
.pub-tools {
  position: sticky;
  top: 52px;
  z-index: 5;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 12px 0 8px;
  margin: 8px 0 4px;
  border-bottom: 1px solid var(--rule);
}
.search {
  width: 100%;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  padding: 8px 14px;
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  background: #fff;
  outline: none;
  margin-bottom: 10px;
}
.search:focus { border-color: var(--accent-soft); box-shadow: 0 0 0 3px rgba(104, 172, 229, .25); }
.pub-tools .years { margin: 0; }
.full-list { margin-top: 8px; }
.full-list .topic-title {
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink);
  margin: 0 0 8px;
}
.full-list .year-block { scroll-margin-top: 170px; }
.count {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  background: #f3f4f6;
  border-radius: 999px;
  padding: 1px 8px;
  vertical-align: middle;
}

/* ---------- footer ---------- */
footer {
  margin-top: 24px;
  padding: 24px max(24px, calc((100% - 952px) / 2)) 32px;
  background: var(--heritage);
  border-top: 3px solid var(--spirit);
  color: rgba(255, 255, 255, .8);
  font-size: 13.5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
footer img { max-width: 160px; height: auto; opacity: .9; border-radius: 3px; }
.visitor-map { width: 240px; max-width: 100%; }
footer a { color: #fff; text-decoration-color: var(--spirit); }

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .site-header .inner { padding: 0 16px; }
  .brand { display: none; }
  .site-nav { margin: 0 auto; gap: 0; scrollbar-width: none; }
  .site-nav::-webkit-scrollbar { display: none; }
  .site-nav a { padding: 4px 9px; font-size: 14px; }
  main { padding: 20px 16px 40px; }
  footer { padding: 20px 16px 32px; }
  .profile { grid-template-columns: 1fr; gap: 16px; }
  .profile .photo { width: 180px; height: 180px; }
  .profile .social, .scholar-stats { width: 240px; }
  h1 { font-size: 30px; }
  h2 .right { margin-left: 0; }
  .pub-tools { position: static; }
  .full-list .year-block { scroll-margin-top: 64px; }
}