:root {
  --navy: #15324a;
  --navy-deep: #0c2235;
  --teal: #176b68;
  --teal-light: #e8f0ee;
  --paper: #f6f5f1;
  --white: #ffffff;
  --text: #273746;
  --muted: #647382;
  --line: #d9dfdf;
  --serif: Iowan Old Style, Baskerville, "Times New Roman", serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--text); font: 16px/1.65 var(--sans); text-rendering: optimizeLegibility; }
a { color: inherit; }
a:focus-visible { outline: 3px solid rgba(23, 107, 104, .3); outline-offset: 4px; border-radius: 3px; }
.skip-link { position: fixed; left: 12px; top: 12px; z-index: 100; padding: 9px 13px; background: var(--white); transform: translateY(-160%); }
.skip-link:focus { transform: none; }

.topbar { position: sticky; top: 0; z-index: 30; border-top: 4px solid var(--teal); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.96); box-shadow: 0 7px 20px rgba(21,50,74,.045); backdrop-filter: blur(12px); }
.topbar-inner, .profile-intro, .directory-section, .collaboration-note, .footer-inner { width: min(1080px, calc(100% - 48px)); margin: 0 auto; }
.topbar-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--navy); font: 700 17px var(--serif); text-decoration: none; white-space: nowrap; }
.brand-mark { display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid var(--navy); border-radius: 50%; font: 10px var(--serif); letter-spacing: .06em; }
.primary-nav { display: flex; align-items: center; gap: 23px; overflow-x: auto; font-size: 11px; font-weight: 750; }
.primary-nav a { padding: 7px 0; text-decoration: none; white-space: nowrap; }
.primary-nav a:hover { color: var(--teal); }
.primary-nav .contact-link { padding: 7px 12px; border: 1px solid var(--line); border-radius: 3px; }
.primary-nav .contact-link:hover { border-color: var(--teal); background: var(--teal-light); }

.profile-intro { display: grid; grid-template-columns: 142px minmax(0, 1fr); gap: clamp(34px, 6vw, 68px); align-items: center; padding: clamp(68px, 9vw, 106px) 0 clamp(62px, 8vw, 90px); }
.portrait-column { display: flex; flex-direction: column; align-items: center; margin: 0; padding-right: 26px; border-right: 1px solid var(--line); text-align: center; }
.profile-photo { display: block; width: 112px; height: 112px; border: 3px solid var(--white); border-radius: 50%; box-shadow: 0 7px 18px rgba(21,50,74,.08); object-fit: cover; }
.portrait-column p { margin: 15px -10px 0; color: var(--muted); font-size: 10px; font-weight: 700; letter-spacing: .045em; }
.intro-copy { max-width: 790px; }
.intro-copy h1 { margin: 0; color: var(--navy); font: 500 clamp(48px, 6.3vw, 72px)/1 var(--serif); letter-spacing: -.04em; }
.credentials { display: flex; flex-wrap: wrap; align-items: center; gap: 7px 10px; margin-top: 19px; color: var(--muted); font-size: 12px; font-weight: 700; line-height: 1.55; }
.credentials a { text-underline-offset: 3px; }
.credentials a:hover { color: var(--teal); }
.research-summary { max-width: 780px; margin: 31px 0 0; color: #405363; font: clamp(19px, 2vw, 23px)/1.57 var(--serif); }
.research-summary strong { color: var(--navy); font-weight: 650; }
.research-summary p { margin: 0; }
.research-summary p + p { margin-top: 18px; }

.directory-section { padding: 58px 0 78px; border-top: 1px solid var(--line); }
.section-heading { margin: 0 0 26px; }
.section-heading h2 { margin: 0; color: var(--navy); font: 500 clamp(28px, 3vw, 38px)/1.1 var(--serif); letter-spacing: -.025em; }
.directory-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.directory-item { display: flex; justify-content: space-between; gap: 20px; min-height: 116px; padding: 22px 23px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.38); text-decoration: none; transition: background .16s, color .16s, transform .16s; }
.directory-item:hover { background: var(--white); }
.directory-item:focus-visible { position: relative; z-index: 1; background: var(--white); }
.directory-item > span:first-child { display: flex; flex-direction: column; gap: 7px; }
.directory-item strong { color: var(--navy); font: 650 20px/1.3 var(--serif); }
.directory-item small { max-width: 390px; color: var(--muted); font-size: 11.5px; line-height: 1.55; }
.arrow { color: var(--teal); font-size: 15px; }

.collaboration-note { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 18px 34px; align-items: center; margin-bottom: 82px; padding: 27px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.collaboration-note p { max-width: 820px; margin: 0; color: #405363; font: 18px/1.55 var(--serif); }
.text-link { color: var(--navy); font-size: 12px; font-weight: 800; text-decoration: underline; text-underline-offset: 4px; white-space: nowrap; }
.text-link:hover { color: var(--teal); }
.collaboration-note small { grid-column: 2; margin-top: -16px; color: var(--muted); font-size: 9px; letter-spacing: .04em; }

.footer { background: var(--navy-deep); color: var(--white); }
.footer-inner { min-height: 104px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.footer-inner > div { display: flex; flex-direction: column; gap: 3px; }
.footer strong { font: 650 16px var(--serif); }
.footer span { color: #9caeb9; font-size: 9px; letter-spacing: .07em; text-transform: uppercase; }
.footer nav { display: flex; flex-wrap: wrap; gap: 22px; font-size: 10.5px; }
.footer a { color: #d6dfe4; text-decoration: none; }
.footer a:hover { color: var(--white); text-decoration: underline; }

@media (max-width: 920px) {
  .topbar-inner { align-items: flex-start; flex-direction: column; padding: 15px 0; }
  .primary-nav { width: 100%; padding-bottom: 2px; }
  .profile-intro { grid-template-columns: 126px minmax(0, 1fr); gap: 34px; }
  .portrait-column { padding-right: 28px; }
  .profile-photo { width: 104px; height: 104px; }
}

@media (max-width: 650px) {
  .topbar-inner, .profile-intro, .directory-section, .collaboration-note, .footer-inner { width: min(100% - 30px, 1080px); }
  .topbar-inner { gap: 10px; padding: 12px 0; }
  .brand > span:last-child { display: none; }
  .primary-nav { flex-wrap: wrap; gap: 2px 17px; overflow: visible; font-size: 10.5px; }
  .primary-nav a { padding: 4px 0; }
  .primary-nav .contact-link { padding: 4px 9px; }
  .profile-intro { grid-template-columns: 1fr; gap: 24px; padding: 38px 0 50px; }
  .portrait-column { align-items: flex-start; padding: 0; border: 0; text-align: left; }
  .profile-photo { width: 92px; height: 92px; }
  .portrait-column p { margin: 12px 0 0; }
  .intro-copy h1 { font-size: 46px; }
  .research-summary { font-size: 19px; }
  .directory-grid { grid-template-columns: 1fr; }
  .directory-item { min-height: 108px; }
  .collaboration-note { grid-template-columns: 1fr; margin-bottom: 58px; }
  .collaboration-note small { grid-column: 1; margin-top: -10px; }
  .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; padding: 28px 0; }
}

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