:root {
  --ink: #1f2933;
  --muted: #64727d;
  --blue: #245d9c;
  --line: #e2e7ea;
  --soft: #f6f8fa;
  --highlight: #f3f7fb;
}

/* Base */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.page {
  width: min(1000px, calc(100% - 48px));
  margin: 0 auto;
}

/* Navigation */

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.name {
  color: var(--ink);
  font-weight: 700;
}

.nav-links {
  display: flex;
  gap: 24px;
  font-size: 0.9rem;
}

.nav-links a {
  color: var(--muted);
}

/* Typography */

h1,
h2 {
  color: #16222b;
  font-family: Georgia, "Times New Roman", serif;
}

h1 {
  margin: 0 0 7px;
  font-size: 2.7rem;
  line-height: 1.1;
}

h2 {
  margin: 0 0 22px;
  font-size: 1.55rem;
  font-weight: 600;
}

h3 {
  margin: 0;
  font-size: 1.02rem;
}

/* Introduction */

.intro {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  column-gap: 32px;
  row-gap: 20px;
  align-items: start;
  padding: 40px 0;
}

.profile-image {
  display: block;
  width: 210px;
  height: 280px;
  margin: 8px 0 0;
  border-radius: 4px;
  object-fit: cover;
  object-position: center;
}

.intro-copy {
  min-width: 0;
  font-size: 0.95rem;
  line-height: 1.5;
}

.intro-details {
  grid-column: 1 / -1;
  min-width: 0;
}

.role {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 1rem;
}

.intro-copy > p:not(.role) {
  margin: 0 0 10px;
}

.intro-copy > p:last-child {
  margin-bottom: 0;
}

/* Recruitment message */

.highlight {
  margin: 0;
  padding: 14px 18px;
  border-left: 4px solid #1e4778;
  background: var(--highlight);
  font-weight: 600;
}

/* Profile links */

.profile-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  font-size: 0.9rem;
}

.profile-links > a,
.wechat-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 5px 13px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
  color: var(--blue);
  font: inherit;
  line-height: 1.4;
  cursor: pointer;
}

.profile-links > a:hover,
.wechat-button:hover {
  background: var(--soft);
  text-decoration: none;
}

/* WeChat QR code */

.wechat-qr {
  display: none;
  width: 180px;
  margin-top: 16px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
  text-align: center;
}

.wechat-qr.show {
  display: block;
}

.wechat-qr img {
  display: block;
  width: 100%;
  height: auto;
}

.wechat-qr span {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.4;
}

/* Main sections */

section {
  padding: 38px 0;
  border-top: 1px solid var(--line);
}

/* Research interests */

.interest-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.interest-list strong,
.interest-list span {
  display: block;
}

.interest-list strong {
  margin-bottom: 5px;
}

.interest-list span {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

/* Studentship heading */

.section-heading {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: end;
  margin-bottom: 26px;
}

.section-heading h2 {
  margin-bottom: 0;
}

.section-heading > p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.eyebrow {
  margin: 0 0 3px;
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* PhD opportunities */

.opportunity-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.opportunity {
  min-width: 0;
  padding: 12px 14px;
  font-size: 0.86rem;
  line-height: 1.4;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
}

.opportunity h3 {
  font-size: 0.95rem;
  line-height: 1.3;
}

.opportunity-topline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 4px 8px;
  margin-bottom: 6px;
}

.opportunity-topline span {
  flex: none;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--muted);
  font-size: 0.75rem;
}

.opportunity p {
  margin: 0 0 6px;
}

.opportunity .note {
  color: var(--muted);
  font-size: 0.86rem;
}

.opportunity-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin-top: 8px;
  font-size: 0.85rem;
  font-weight: 600;
}

/* News */

.news-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.news-list li {
  display: grid;
  grid-template-columns: 105px minmax(0, 1fr);
  gap: 18px;
  margin-bottom: 12px;
}

.news-list time {
  color: var(--muted);
  font-size: 0.88rem;
  font-variant-numeric: tabular-nums;
}

/* Footer */

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 28px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
}

footer a {
  color: var(--muted);
}

/* Optional York affiliation/logo */

.footer-affiliation {
  display: flex;
  align-items: center;
  gap: 12px;
}

.york-logo {
  display: block;
  width: 125px;
  height: auto;
}

@media (max-width: 760px) {
  .opportunity-list {
    grid-template-columns: 1fr;
  }
}

/* Tablet and mobile */

@media (max-width: 680px) {
  .page {
    width: min(100% - 28px, 1000px);
  }

  nav {
    align-items: flex-start;
  }

  .nav-links {
    gap: 12px;
    text-align: right;
  }

  .nav-links a:first-child {
    display: none;
  }

  .intro {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 22px;
    padding: 32px 0;
  }

  .profile-image {
    width: 120px;
    height: 145px;
  }

  h1 {
    font-size: 2.2rem;
  }

  .role {
    margin-bottom: 12px;
    font-size: 0.9rem;
    line-height: 1.5;
  }

  .interest-list,
  .section-heading {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .opportunity-topline {
    align-items: flex-start;
  }

  .news-list li {
    grid-template-columns: 1fr;
    gap: 0;
  }

  footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

/* Small phones */

@media (max-width: 520px) {
  .intro {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .profile-image {
    width: 150px;
    height: 180px;
  }

  h1 {
    font-size: 2.15rem;
  }

  .profile-links {
    gap: 8px;
  }

  .profile-links > a,
  .wechat-button {
    padding: 5px 10px;
  }

  .opportunity {
    padding: 12px 14px;
  }

  .opportunity-topline {
    flex-direction: column;
    gap: 4px;
  }
}
/* Honours and awards */
.honours-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.92rem;
  line-height: 1.5;
}

.honours-list li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
}

.honours-list time,
.award-org {
  color: var(--muted);
}

.honours-list time {
  font-variant-numeric: tabular-nums;
}

@media (max-width: 680px) {
  .nav-links {
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 6px 12px;
  }

  nav {
    gap: 20px;
  }

  nav > .name {
    flex-shrink: 0;
  }
}

/* Patent filings */
.patent-list {
  gap: 14px;
}

.patent-list strong {
  font-weight: 600;
}

.patent-meta {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.85rem;
}

/* Contact and collaboration */
.contact-intro {
  margin: 0 0 12px;
}

.contact-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 32px;
  margin: 0;
  padding-left: 20px;
  font-size: 0.92rem;
  line-height: 1.5;
}

.contact-list li::marker {
  color: var(--blue);
}

.contact-email {
  margin: 18px 0 0;
  font-size: 0.92rem;
  overflow-wrap: anywhere;
}

@media (max-width: 680px) {
  .contact-list {
    grid-template-columns: 1fr;
  }
}

/* Research links and publication pages */
.interest-link {
  display: block;
  height: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--ink);
}
.interest-link:hover {
  background: var(--soft);
  border-color: var(--blue);
  text-decoration: none;
}
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 4px;
}
.interest-list .interest-cta {
  margin-top: 12px;
  color: var(--blue);
  font-size: 0.85rem;
}
.interest-list .interest-cta span { display: inline; color: inherit; }
.research-heading { padding: 34px 0 0; }
.back-link { display: inline-block; margin-bottom: 24px; font-size: 0.9rem; }
.research-heading h1 { font-size: clamp(2rem, 5vw, 2.7rem); }
.research-heading > p { max-width: 780px; margin: 18px 0 22px; color: var(--muted); }
.research-tabs {
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 8px 22px;
  padding: 0 0 22px;
  border: 0;
  font-size: 0.9rem;
}
.research-tabs a[aria-current="page"] { color: var(--ink); font-weight: 700; text-decoration: underline; text-underline-offset: 5px; }
.papers-section { padding: 28px 0; }
.paper-list { list-style: none; margin: 0; padding: 0; }
.paper-list li + li { margin-top: 22px; padding-top: 22px; border-top: 1px solid var(--line); }
.paper-venue { margin: 0 0 4px; color: var(--muted); font-size: 0.82rem; }
.paper-list h3 { font-size: 1.04rem; line-height: 1.45; }
.paper-authors { margin: 6px 0; color: var(--muted); font-size: 0.87rem; line-height: 1.5; }
.paper-authors strong { color: var(--ink); }
.paper-summary { margin: 6px 0 0; font-size: 0.92rem; line-height: 1.55; }
.publication-note { margin: 0 0 32px; color: var(--muted); font-size: 0.87rem; }
@media (max-width: 680px) {
  .research-page .nav-links a:first-child { display: inline; }
  .research-tabs { gap: 10px 18px; }
}