:root{
  --bg: #f7faf9;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: rgba(15, 23, 42, 0.10);

  --accent: #005E60;
  --accent-2: #00827A;

  --shadow: 0 10px 25px rgba(2, 6, 23, 0.08);
  --shadow-soft: 0 6px 18px rgba(2, 6, 23, 0.06);

  --radius: 16px;
  --radius-sm: 12px;

  --max: 980px;

  /* Bigger overall type */
  --base: 18px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: "Lato", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  font-size: var(--base);
  line-height: 1.65;
  color: var(--text);
  background: radial-gradient(1200px 600px at 10% -10%, rgba(0,130,122,0.10), transparent 60%),
              radial-gradient(1000px 500px at 90% 10%, rgba(0,94,96,0.10), transparent 60%),
              var(--bg);
}

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

.wrap{
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.muted{ color: var(--muted); }

.top-nav{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-inner{
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 10px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0.2px;
  color: var(--text);
}
.brand:hover{ text-decoration: none; }
.brand-dot{
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 4px rgba(0,94,96,0.12);
}

.nav-links{
  display: flex;
  align-items: center;
  gap: 14px;
}
.nav-links a{
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--text);
  font-weight: 600;
  font-size: 0.98rem;
}
.nav-links a:hover{
  background: rgba(0,94,96,0.08);
  text-decoration: none;
}
.nav-links a.active{
  background: rgba(0,94,96,0.12);
  color: var(--accent);
}

.nav-toggle{
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 2px 10px rgba(2,6,23,0.05);
  cursor: pointer;
}
.nav-toggle-bar{
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
}
@media (min-width: 860px){
  .nav-toggle{ display: none; }
}

/* Mobile dropdown */
@media (max-width: 859px){
  .nav-links{
    position: absolute;
    right: 16px;
    top: 58px;
    width: min(260px, calc(100vw - 32px));
    display: grid;
    gap: 6px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: rgba(255,255,255,0.97);
    box-shadow: var(--shadow);
    transform-origin: top right;
  }
  .nav-links[data-collapsed="true"]{
    display: none;
  }
  .nav-links a{
    padding: 10px 12px;
  }
}

/* Hero */
.hero{
  padding: 26px 0 10px;
}
.hero-grid{
  display: grid;
  gap: 18px;
  align-items: start;
}
.hero-photo img{
  width: 100%;
  max-width: 260px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  background: #fff;
}
.hero-main h1{
  margin: 0;
  font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.35rem);
  line-height: 1.25;
}
.hero-subtitle{
  margin: 10px 0 14px;
  color: var(--muted);
}
.hero-cards{
  display: grid;
  gap: 12px;
  margin-top: 10px;
}
.mini-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 14px;
}
.mini-title{
  margin: 0 0 10px;
  font-size: 1.05rem;
  color: var(--accent);
}
.mini-stack{
  display: grid;
  gap: 8px;
}
.mini-row{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.chip{
  display: inline-flex;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid rgba(0,94,96,0.18);
  background: rgba(0,94,96,0.06);
  color: var(--text);
  font-weight: 600;
}
.chip:hover{ text-decoration: none; background: rgba(0,94,96,0.10); }

.icon-chip{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-weight: 700;
}
.icon-chip img{
  width: 18px;
  height: 18px;
  display: block;
}
.icon-chip:hover{
  text-decoration: none;
  border-color: rgba(0,94,96,0.30);
  box-shadow: 0 6px 18px rgba(0,94,96,0.10);
}

.hero-note{
  margin: 12px 0 0;
}
.inline-link{
  font-weight: 700;
  color: var(--accent);
}
.inline-link:hover{ text-decoration: underline; }

@media (min-width: 860px){
  .hero-grid{
    grid-template-columns: 280px 1fr;
    gap: 26px;
  }
  .hero-cards{
    grid-template-columns: 1fr 1fr;
  }
}

/* Main cards */
main.wrap{
  padding: 10px 0 28px;
}

.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 18px;
  margin: 14px 0;
  text-align: left; /* left aligned sections */
}

.card h2{
  margin: 0 0 10px;
  font-size: 1.35rem;
  color: var(--accent);
}

.bullets{
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 6px;
}
.bullets li{
  color: var(--text);
}

/* Publications */
.section-head{
  display: grid;
  gap: 12px;
  align-items: start;
}
@media (min-width: 700px){
  .section-head{
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

.filters{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-start;
}
.filter{
  display: grid;
  gap: 6px;
}
.filter-label{
  font-size: 0.92rem;
  color: var(--muted);
  font-weight: 700;
}
.filter-select{
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 1rem;
}
.btn-ghost{
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.75);
  cursor: pointer;
  font-weight: 800;
}
.btn-ghost:hover{
  border-color: rgba(0,94,96,0.30);
}

.pub-list{
  margin-top: 12px;
  display: grid;
  gap: 12px;
}

.pub-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  padding: 14px;
  box-shadow: 0 10px 22px rgba(2,6,23,0.04);
  position: relative;
}

/* simple separator “hint” */
.pub-card::after{
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: -7px;
  height: 1px;
  background: rgba(15, 23, 42, 0.08);
  border-radius: 999px;
}
.pub-card:last-child::after{
  display: none;
}

.pub-top{
  display: grid;
  gap: 10px;
}
@media (min-width: 700px){
  .pub-top{
    grid-template-columns: 1fr auto;
    align-items: start;
  }
}

.pub-title{
  margin: 0;
  font-size: 1.14rem;
  line-height: 1.35;
}
.pub-title a{
  color: var(--text);
}
.pub-title a:hover{
  color: var(--accent);
  text-decoration: none;
}

.pub-meta{
  display: inline-flex;
  gap: 8px;
  justify-content: flex-start;
  flex-wrap: wrap;
}
.tag{
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 800;
  font-size: 0.90rem;
  border: 1px solid rgba(0,94,96,0.20);
  background: rgba(0,94,96,0.06);
  color: var(--accent);
}

.pub-authors,
.pub-venue{
  margin: 8px 0 0;
  color: var(--muted);
}

.pub-links{
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.pill{
  display: inline-flex;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid rgba(0,94,96,0.25);
  background: rgba(0,94,96,0.06);
  color: var(--text);
  font-weight: 800;
}
.pill:hover{
  text-decoration: none;
  background: rgba(0,94,96,0.10);
}

.award{
  color: var(--accent);
  font-weight: 800;
}

.empty-state{
  margin: 12px 0 0;
  padding: 12px;
  border-radius: 12px;
  border: 1px dashed rgba(0,94,96,0.35);
  background: rgba(0,94,96,0.05);
  color: var(--muted);
  font-weight: 700;
}

/* Footer */
.site-footer{
  margin-top: 20px;
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.75);
}
.footer-inner{
  padding: 14px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
}
.backtop{
  font-weight: 800;
  color: var(--accent);
}

/* Reveal animation (IntersectionObserver in JS) */
.reveal{
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 650ms ease, transform 650ms ease;
}
.reveal.is-visible{
  opacity: 1;
  transform: translateY(0);
}

/* Better focus */
:focus-visible{
  outline: 3px solid rgba(0,130,122,0.35);
  outline-offset: 2px;
  border-radius: 10px;
}