:root{
  --ink:#111;
  --muted:#777;
  --line:#e3e3e3;
  --accent:#296d98;
  --accent-hover:#579fcc;
  --red:#e2001a;
  --paper:#fff;
  --soft:#f7f7f7;
  --max:1040px;
}

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

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:Arial,Helvetica,sans-serif;
  line-height:1.55;
  font-size:clamp(14px,1.2vw,20px);
}

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

.wrap{
  width:min(var(--max),calc(100% - 40px));
  margin:auto;
}

/* Header: clean redesign structure, old-style typography */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
}
.nav{
  min-height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{
  color:var(--ink);
  font-size:clamp(16px,1.6vw,30px);
  font-weight:400;
}
.nav-links{
  display:flex;
  gap:24px;
  font-size:clamp(14px,1.2vw,20px);
}
.nav-links a{color:var(--ink)}

/* Compact landscape hero */
.hero-photo{
  position:relative;
  width:100%;
  height:clamp(340px,34vw,500px);
  overflow:hidden;
  background:#ddd;
}
.hero-photo>img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center 42%;
}
.hero-overlay{
  position:absolute;
  top:50%;
  right:8vw;
  width:min(36vw,500px);
  transform:translateY(-50%);
  padding:20px 0;
  background:none;
  backdrop-filter:none;
  -webkit-backdrop-filter:none;
  isolation:isolate;
}

.hero-overlay::before{
  content:"";
  position:absolute;
  inset:-28px -44px;
  z-index:-1;
  background:linear-gradient(
    90deg,
    rgba(255,255,255,0) 0%,
    rgba(255,255,255,.18) 24%,
    rgba(255,255,255,.38) 58%,
    rgba(255,255,255,.50) 100%
  );
  filter:blur(14px);
  border-radius:28px;
}
.eyebrow{
  text-transform:uppercase;
  letter-spacing:.11em;
  font-size:clamp(10px,.8vw,14px);
  color:#555;
  margin-bottom:8px;
  text-shadow:0 1px 5px rgba(255,255,255,.7);
}
.hero-overlay h1{
  margin:0 0 5px;
  font-family:Arial,Helvetica,sans-serif;
  font-size:clamp(28px,2.5vw,48px);
  line-height:1.04;
  font-weight:400;
  color:#111;
  text-shadow:0 1px 8px rgba(255,255,255,.72);
}
.role{
  margin:0;
  font-size:clamp(18px,1.55vw,29px);
  line-height:1.2;
  font-weight:400;
  color:#333;
  text-shadow:0 1px 6px rgba(255,255,255,.72);
}

.intro-section{
  padding:42px 0;
  border-bottom:1px solid var(--line);
}
.intro-wrap{max-width:1040px}
.intro{
  margin:0;
  max-width:850px;
  font-size:clamp(14px,1.2vw,20px);
  text-align:justify;
}
.quick-links{
  display:flex;
  gap:18px;
  flex-wrap:wrap;
  margin-top:18px;
}
.quick-links a,
.paper-links a{
  font-size:clamp(13px,1.05vw,18px);
}

/* Keep the cleaner two-column section structure */
.section{
  padding:72px 0;
  border-bottom:1px solid var(--line);
}
.section-head{
  display:grid;
  grid-template-columns:220px 1fr;
  gap:36px;
}
.section h2{
  margin:0;
  font-family:Arial,Helvetica,sans-serif;
  font-size:clamp(20px,2vw,30px);
  line-height:1.2;
  font-weight:500;
}
.section h3{
  margin:0 0 24px;
  font-family:Arial,Helvetica,sans-serif;
  font-size:clamp(17px,1.8vw,27px);
  line-height:1.25;
  font-weight:500;
}
.research-group+.research-group{margin-top:56px}

/* Research */
.paper{
  padding:0 0 26px;
  margin:0 0 28px;
  border-bottom:1px solid var(--line);
}
.paper:last-child{margin-bottom:0}
.paper-title{
  color:var(--ink);
  font-family:Arial,Helvetica,sans-serif;
  font-size:clamp(14px,1.2vw,20px);
  line-height:1.4;
  font-weight:400;
}
.paper-title:hover{color:var(--accent-hover)}
.paper-meta{
  color:#969696;
  font-size:clamp(14px,1.2vw,20px);
  margin-top:3px;
}
.paper-citation{
  color:var(--accent);
  font-size:clamp(14px,1.2vw,20px);
  margin-top:3px;
}
.paper-links{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  margin-top:6px;
}
.paper-links .external-link{color:var(--red)}

.paper details{margin-top:9px}
.paper summary,
.legal details summary,
#codes details summary{
  cursor:pointer;
  color:var(--accent);
  font-size:clamp(14px,1.2vw,20px);
  font-weight:600;
  list-style:none;
}
.paper summary::-webkit-details-marker,
.legal summary::-webkit-details-marker{
  display:none;
}
.paper summary:after{content:" +"}
.paper details[open] summary:after{content:" −"}
.paper .abstract{
  margin:11px 0 0;
  padding:14px 17px;
  background:var(--soft);
  border-left:2px solid #ddd;
  color:#333;
  font-size:clamp(13px,1.05vw,18px);
  text-align:justify;
}

/* Code */
.code-content>ul{
  padding:0;
  list-style:none;
  margin:0;
}
.code-content>ul>lh{
  display:block;
  font-size:clamp(17px,1.8vw,27px);
  margin-bottom:24px;
}
.code-content>ul>li{
  padding:0 0 26px;
  margin:0 0 28px;
  border-bottom:1px solid var(--line);
}
.code-content li>a:first-child{
  color:var(--ink);
  font-family:Arial,Helvetica,sans-serif;
  font-size:clamp(14px,1.2vw,20px);
  font-weight:400;
}
.code-content li>a:first-child:hover{color:var(--accent-hover)}
.code-content ul ul{
  font-size:clamp(12px,1vw,18px);
  color:#444;
}
.code-content p{margin:.6em 0}

/* Contact + legal */
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:50px;
}
.legal{
  font-size:clamp(13px,1.05vw,18px);
  color:#444;
}
.legal h3{
  margin:0 0 18px;
  font-size:clamp(17px,1.8vw,27px);
  font-weight:500;
}
.legal h4{
  margin:28px 0 8px;
  font-size:clamp(14px,1.2vw,20px);
}
.legal p{max-width:900px}

/* Footer */
.footer{
  padding:40px 0 54px;
  color:var(--muted);
  font-size:clamp(12px,1vw,17px);
}
.footer .wrap{
  display:flex;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
}
.footer-links{
  display:flex;
  gap:18px;
}

/* Responsive */
@media(max-width:900px){
  .hero-photo{
    height:390px;
  }
  .hero-photo>img{
    object-position:40% 42%;
  }
  .hero-overlay{
    right:4vw;
    width:40vw;
    padding:18px 0;
  }
}
@media(max-width:760px){
  body{font-size:16px}
  .nav{
    height:auto;
    padding:15px 0;
    align-items:flex-start;
  }
  .nav-links{
    gap:12px;
    flex-wrap:wrap;
    justify-content:flex-end;
  }
  .section{padding:52px 0}
  .section-head{
    grid-template-columns:1fr;
    gap:26px;
  }
  .contact-grid{grid-template-columns:1fr}
  .wrap{width:min(var(--max),calc(100% - 28px))}
  .intro-section{padding:42px 0}
}
@media(max-width:620px){
  .hero-photo{
    height:330px;
    background:#efefef;
  }
  .hero-photo>img{
    object-position:32% center;
  }
  .hero-overlay{
    top:auto;
    right:0;
    bottom:0;
    left:0;
    width:100%;
    transform:none;
    padding:46px 20px 17px;
    background:linear-gradient(to top,rgba(0,0,0,.68),rgba(0,0,0,0));
    backdrop-filter:none;
    -webkit-backdrop-filter:none;
  }
  .hero-overlay::before{
    display:none;
  }
  .hero-overlay .eyebrow,
  .hero-overlay .role,
  .hero-overlay h1{
    color:#fff;
  }
  .hero-overlay h1{font-size:34px}
  .hero-overlay .role{font-size:19px}
  .intro{text-align:left}
}
@media(max-width:480px){
  .brand{font-size:18px}
  .nav-links{font-size:13px}
}