:root{
  --text:#3f4145; --heading:#1f2023; --link:#2a7ae2; --link-hover:#1856a8;
  --border:#ececec; --muted:#7a7d82; --maxw:820px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Source Sans 3',-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  color:var(--text);background:#fff;font-size:18px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--link);text-decoration:none}
a:hover{color:var(--link-hover);text-decoration:underline}
strong{color:var(--heading);font-weight:600}

/* header */
.masthead{border-bottom:1px solid var(--border);background:#fff}
.masthead-inner{max-width:1040px;margin:0 auto;padding:16px 24px;display:flex;
  align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none}
.brand:hover{text-decoration:none}
.logo{height:36px;width:auto;display:block}
.brand-name{font-size:20px;font-weight:700;color:var(--heading)}
.header-right{display:flex;flex-direction:column;align-items:flex-end;gap:7px}
.site-nav{display:flex;gap:22px;flex-wrap:wrap}
.site-nav a{color:var(--text);font-size:16px;text-decoration:none}
.site-nav a:hover{color:var(--link);text-decoration:none}
.site-nav a.active{color:var(--link);font-weight:600}
.social{display:flex;gap:12px}
.social a{color:var(--muted);display:inline-flex;text-decoration:none}
.social a:hover{color:var(--link)}
.social svg{width:20px;height:20px;fill:currentColor;display:block}

/* content */
main{max-width:var(--maxw);margin:0 auto;padding:42px 24px}
h1{font-size:30px;font-weight:700;color:var(--heading);margin-bottom:20px;line-height:1.2}
h2{font-size:22px;font-weight:700;color:var(--heading);margin:30px 0 12px;line-height:1.3}
p{margin-bottom:18px}
.lead p{font-size:19px}
ul{margin:0 0 18px 1.25em}
li{margin-bottom:8px}

.portrait{float:right;width:200px;height:200px;border-radius:50%;object-fit:cover;
  margin:4px 0 18px 26px}
@media(max-width:560px){.portrait{float:none;display:block;margin:0 auto 20px}}

.tagline{font-size:17px;color:var(--muted);margin:-8px 0 22px}
.stat{color:var(--text)}
.find a{white-space:nowrap}
.find .dot{color:var(--muted);margin:0 8px}

.pubs p{margin-bottom:14px}
.pubs em{color:var(--muted)}
.cv p{margin-bottom:10px}

/* contact form */
.field{margin-bottom:16px}
.field label{display:block;font-size:15px;color:var(--heading);font-weight:600;margin-bottom:6px}
.field input,.field textarea{width:100%;padding:10px 12px;font:inherit;font-size:16px;
  border:1px solid #d9dbdd;border-radius:6px;background:#fff;color:var(--text)}
.field textarea{min-height:120px;resize:vertical}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--link)}
.btn{display:inline-block;background:var(--link);color:#fff;border:none;padding:11px 26px;
  font:inherit;font-size:16px;font-weight:600;border-radius:6px;cursor:pointer}
.btn:hover{background:var(--link-hover)}

footer{border-top:1px solid var(--border);margin-top:40px}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:24px;color:var(--muted);font-size:14px;text-align:center}

@media(max-width:640px){
  .masthead-inner{flex-direction:column;align-items:flex-start}
  .header-right{align-items:flex-start;width:100%}
}