:root{
  --max: 68rem;
  --pad: clamp(1rem, 3vw, 1.75rem);
  --radius: 1rem;
  --border: #000;
  --bg: #fff;
  --fg: #000;
  --muted: #222;
  --link: #000;
  --focus: #000;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body{
  margin:0;
  font: 17px/1.6 system-ui, -apple-system, "SF Pro Text", "SF Pro Display", Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  text-rendering: geometricPrecision;
}

a{ color: var(--link); text-underline-offset: 3px; }
a:hover{ text-decoration-thickness: 2px; }
a:focus-visible{
  outline: 3px solid var(--focus);
  outline-offset: 4px;
  border-radius: 6px;
}

.skip-link{
  position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{
  left: var(--pad); top: var(--pad);
  width:auto; height:auto; padding: .6rem .75rem;
  border:2px solid var(--border);
  background: var(--bg);
  z-index: 1000;
}

header{
  position: sticky;
  top: 0;
  z-index: 1000;  
  border-bottom: 2px solid var(--border);
  background: var(--bg);
}

.nav{
  max-width: var(--max);
  margin: 0 auto;
  padding: .85rem var(--pad);
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand{
  font-weight: 750;
  font-size: 1.75rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.nav ul{
  list-style:none;
  padding:0; margin:0;
  display:flex;
  flex-wrap:wrap;
  gap: .75rem 1rem;
  align-items:center;
}

.pill{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: .4rem .75rem;
  border:2px solid var(--border);
  border-radius: 999px;
  text-decoration:none;
  font-weight: 650;
  white-space: nowrap;
}

main{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.hero{
  padding: clamp(2rem, 6vw, 4rem) 0 1.25rem;
}
h1{
  margin: 0 0 .75rem;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.lede{
  max-width: 72ch;
  margin: 0 0 1rem;
  font-size: 1.05rem;
}
.kicker{
  font-size: .95rem;
  max-width: 80ch;
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.section{
  padding: 2.25rem 0;
  border-top: 2px solid var(--border);
}
.section h2{
  margin: 0 0 .75rem;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
}
.section p{ max-width: 80ch; }

.grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.card{
  border:2px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}
.card h3{
  margin: 0 0 .5rem;
  font-size: 1.05rem;
}
.card p{ margin: 0 0 .75rem; color: var(--muted); }
.meta{
  list-style:none; padding:0; margin:0;
  display:flex; flex-wrap:wrap; gap:.5rem;
}
.tag{
  display:inline-block;
  padding: .2rem .55rem;
  border:2px solid var(--border);
  border-radius: 999px;
  font-size: .85rem;
}

.two-col{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 1.25rem;
}
@media (max-width: 48rem){
  .two-col{ grid-template-columns: 1fr; }
}

dl{
  margin: 0;
}
dt{ font-weight: 700; margin-top: .75rem; }
dd{ margin: .2rem 0 0; color: var(--muted); }

ol.pubs{
  padding-left: 1.25rem;
  margin: 1rem 0 0;
  display:grid;
  gap: .9rem;
}
.pubs li{ max-width: 95ch; }
.pub-title{ font-weight: 750; }
.pub-venue{ color: var(--muted); }

.footer{
  border-top: 2px solid var(--border);
  margin-top: 2.5rem;
}
.footer-inner{
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem var(--pad);
  display:flex;
  gap: 1rem;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
}
.small{ font-size: .9rem; color: var(--muted); }

:target{
  scroll-margin-top: 5rem;
}

hr{
  border:0;
  border-top:2px solid var(--border);
  margin: 1.25rem 0;
}

.visually-hidden{
  position:absolute !important;
  height:1px; width:1px;
  overflow:hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space:nowrap;
}
/* Forms (black/white, accessible) */
label{ font-weight: 650; }
input[type="search"], input[type="text"]{
  width: 100%;
  max-width: 42rem;
  padding: .6rem .7rem;
  border:2px solid var(--border);
  border-radius: .75rem;
  background: var(--bg);
  color: var(--fg);
}
fieldset{
  border:2px solid var(--border);
  border-radius: var(--radius);
  padding: .9rem 1rem 1rem;
  margin: 1rem 0 0;
}
legend{
  font-weight: 750;
  padding: 0 .35rem;
}
.filter-row{
  display:flex;
  flex-wrap:wrap;
  gap: .75rem 1rem;
  align-items:center;
}
.filter-row label{
  font-weight: 600;
  display:flex;
  gap:.4rem;
  align-items:center;
}
button{
  font: inherit;
  padding: .45rem .75rem;
  border:2px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--fg);
  cursor:pointer;
  font-weight: 650;
}
button:focus-visible{
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}
.all-list{
  margin-top: 1rem;
  display:grid;
  gap: .9rem;
}
.all-item{
  border:2px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}
.all-item h3{
  margin:0 0 .35rem;
  font-size: 1.05rem;
}
.all-item p{
  margin:0 0 .65rem;
  color: var(--muted);
}
/* Publications (click title to expand abstract) */
.pub details{
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: .75rem 1rem;
  background: var(--bg);
}
.pub summary{
  cursor: pointer;
  list-style: none;
}
.pub summary::-webkit-details-marker{ display:none; }
.pub-title{
  display:block;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.pub-meta{
  display:block;
  color: var(--muted);
  font-size: .95rem;
  margin-top: .15rem;
}
.pub-body{ margin-top: .75rem; }
.pub-abstract{ margin: 0 0 .6rem; color: var(--muted); }
.pub-links a{ font-weight: 650; }

/* Hero with Photo */

.hero-with-photo{
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 2rem;
  align-items: start;
}

.hero-text{
  max-width: 70ch;
}

.hero-photo{
  margin: 0;
}

.hero-photo img{
  display: block;
  width: 100%;
  max-width: 18rem;
  height: auto;
  border-radius: 1rem;        /* optional */
  border: 2px solid #000;     /* black & white only */
}

/* Stack on small screens */
@media (max-width: 48rem){
  .hero-with-photo{
    grid-template-columns: 1fr;
  }

  .hero-photo img{
    max-width: 14rem;
  }
}