:root {
  --ink: #13202c;
  --muted: #5c6872;
  --paper: #f7f5f0;
  --white: #ffffff;
  --accent: #9a6d22;
  --line: #d9d4c9;
  --panel: #ece9e1;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

a { color: inherit; }

.site-header {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  text-decoration: none;
  font-weight: 800;
  letter-spacing: .08em;
  border: 1px solid var(--ink);
  padding: 7px 11px;
}

nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

nav a {
  text-decoration: none;
  font-size: .95rem;
}

nav a:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 70px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) 300px;
  gap: 72px;
  align-items: center;
  padding: 74px 0 86px;
}

.eyebrow {
  margin: 0 0 12px;
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: .75rem;
  font-weight: 800;
  color: var(--accent);
}

h1, h2, h3 {
  line-height: 1.1;
  margin-top: 0;
}

h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3rem, 6.8vw, 5.35rem);
  font-weight: 500;
  letter-spacing: -.045em;
  margin-bottom: 24px;
  max-width: 780px;
}

h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.1rem, 4vw, 3.5rem);
  font-weight: 500;
  letter-spacing: -.025em;
  margin-bottom: 28px;
}

h3 {
  font-size: 1.12rem;
  margin-bottom: 8px;
}

.lead {
  font-size: clamp(1.15rem, 2vw, 1.36rem);
  max-width: 760px;
  color: #2f3c46;
}

.location {
  color: var(--muted);
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.button {
  display: inline-block;
  padding: 12px 18px;
  text-decoration: none;
  border: 1px solid var(--ink);
  font-weight: 700;
}

.primary {
  background: var(--ink);
  color: var(--white);
}

.secondary {
  background: transparent;
}

.identity-card {
  width: 100%;
  max-width: 300px;
  justify-self: end;
  border-top: 3px solid var(--accent);
  padding-top: 20px;
}

.portrait {
  width: 188px;
  height: 188px;
  display: block;
  margin: 4px auto 24px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 28%;
  border: 1px solid var(--line);
  box-shadow: 0 12px 30px rgba(19, 32, 44, 0.10);
  background: #ddd7ca;
}

dl { margin: 0; }

dl div {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

dt {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .09em;
  color: var(--muted);
}

dd {
  margin: 3px 0 0;
  font-weight: 700;
  line-height: 1.45;
}

.subtle {
  font-weight: 500;
  color: var(--muted);
}

.section {
  padding: 82px 0;
  border-top: 1px solid var(--line);
}

.panel {
  background: var(--panel);
  margin-left: -24px;
  margin-right: -24px;
  padding-left: 24px;
  padding-right: 24px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 42px;
  font-size: 1.08rem;
}

.two-col p { margin-top: 0; }

.qualification-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.qualification-card {
  background: rgba(255,255,255,.55);
  border: 1px solid #d8d2c5;
  padding: 22px;
}

.qualification-card.current {
  border-top: 3px solid var(--accent);
}

.qualification-card h3 {
  margin: 6px 0 10px;
  font-size: 1.15rem;
}

.qualification-card p {
  margin: 6px 0 0;
}

.qualification-year {
  color: var(--accent);
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
  font-size: .75rem;
}

.institution {
  font-weight: 700;
  color: #34424c;
}

.role-stack {
  max-width: 760px;
  border-top: 1px solid var(--line);
}

.role-line {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}

.role-line strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.4rem;
  font-weight: 500;
}

.role-line span {
  color: var(--muted);
}

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

.credential-grid > div {
  background: var(--white);
  border: 1px solid #d8d2c5;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.credential-grid span {
  color: var(--muted);
  font-size: .93rem;
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.expertise-grid > div {
  border-top: 2px solid var(--accent);
  padding: 20px 0 4px;
}

.expertise-grid h3 {
  margin-bottom: 10px;
}

.expertise-grid p {
  margin-top: 0;
  color: var(--muted);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tags span {
  padding: 9px 12px;
  border: 1px solid #c9c2b3;
  background: rgba(255,255,255,.42);
}

.research-interests {
  border-top: 1px solid var(--line);
}

.publication {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 30px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.pub-year {
  margin: 0;
  color: var(--accent);
  font-weight: 800;
}

.publication p {
  margin: 0 0 6px;
  color: var(--muted);
}

.publication a {
  color: #334a5e;
  text-underline-offset: 3px;
}

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

.education-list > div {
  border-top: 2px solid var(--accent);
  padding: 18px 0 4px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.education-list span {
  color: var(--muted);
}

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

.profile-grid a {
  background: var(--white);
  border: 1px solid #d8d2c5;
  padding: 20px;
  text-decoration: none;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.profile-grid a:hover {
  border-color: var(--accent);
}

.profile-grid span {
  color: var(--muted);
  text-align: right;
}

.closing {
  max-width: 760px;
}

footer {
  border-top: 1px solid var(--line);
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 24px 60px;
  color: var(--muted);
  font-size: .9rem;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 44px;
    padding: 52px 0 70px;
  }

  .identity-card {
    justify-self: start;
    max-width: 300px;
  }

  .portrait {
    margin-left: 0;
    margin-right: 0;
  }
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    gap: 20px;
  }

  nav {
    gap: 14px;
    justify-content: flex-end;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 4.8rem);
  }

  .two-col,
  .qualification-grid,
  .credential-grid,
  .expertise-grid,
  .education-list,
  .profile-grid {
    grid-template-columns: 1fr;
  }

  .role-line {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .publication {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .portrait {
    width: 168px;
    height: 168px;
  }
}