:root{--bg:#fff;--text:#121212;--muted:#5b5b5b;--border:#e6e6e6;--link:#111}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text)}
/* Body text = Source Serif 4 Light */
body{font-family:'Source Serif 4','Linux Libertine','Georgia','Times New Roman',serif;font-weight:300;font-size:16px;line-height:1.7}

/* Links are clearly underlined (web analogue of “make links obvious”) */
a{color:var(--link);text-decoration:underline;text-decoration-thickness:.06em;text-underline-offset:3px}
a:hover{opacity:.85}

/* Layout */
.container{max-width:1100px;margin:0 auto;padding:0 24px}
.nav{position:sticky;top:0;z-index:10;background:#fff;border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
/* NAV uses Libertine stack with Libre Baskerville fallback, ALL CAPS */
.brand a{font-family:'Linux Libertine','Libre Baskerville','Source Serif 4',serif;font-weight:700;color:var(--text);text-decoration:none}
.nav ul{display:flex;gap:22px;list-style:none;margin:0;padding:0}
.nav a{font-family:'Linux Libertine','Libre Baskerville','Source Serif 4',serif;color:var(--text);text-decoration:none;letter-spacing:.08em;text-transform:uppercase;font-size:12px}
.nav a:hover{text-decoration:underline}
.nav a.active{border-bottom:2px solid #111;padding-bottom:6px}

/* Hero — photo LEFT, bio RIGHT */
.hero{display:grid;grid-template-columns:360px 1fr;gap:40px;align-items:start;padding:72px 0}
/* Headings/subheadings = Source Serif 4 Light */
h1,h2,h3{font-family:'Source Serif 4','Linux Libertine','Georgia',serif;font-weight:300}
.hero h1{font-size:44px;line-height:1.05;letter-spacing:-0.5px;margin:0 0 18px}
.hero p{margin:10px 0}
.hero .photo{width:360px;height:360px;border-radius:2px;overflow:hidden;border:2px solid var(--border);background:#fafafa}
.hero .photo img{width:100%;height:100%;object-fit:cover}

/* Sections */
.section{padding:40px 0;border-top:1px solid var(--border)}
.section h2{font-size:22px;margin:0 0 12px}
.section ul{margin:0;padding-left:18px}
.section li{margin:8px 0}

/* Abstract toggles */
.toggle{display:inline-flex;align-items:center;gap:6px;cursor:pointer;user-select:none}
.toggle svg{width:14px;height:14px;transition:transform .2s ease}
.toggle[aria-expanded="true"] svg{transform:rotate(180deg)}
.abstract{display:none;margin:8px 0 0 0;color:#222}
.abstract.open{display:block}

/* Footer (smaller) */
.footer{padding:28px 0;border-top:1px solid var(--border);font-size:12px;color:var(--muted)}
.footer a{color:#111}

/* Responsive */
@media (max-width:900px){
  .hero{grid-template-columns:1fr;gap:24px}
  .hero .photo{width:100%;height:320px}
}