:root{
  --bg: #0b0d12;
  --panel: #111521;
  --panel-2: #0f1320;
  --text: #e9eef7;
  --muted: rgba(233,238,247,.72);
  --muted2: rgba(233,238,247,.55);
  --border: rgba(255,255,255,.10);
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 18px;

  --accent: #7dd3fc;   /* subtle sky */
  --accent2: #a7f3d0;  /* subtle mint */
  --maxw: 1060px;
}

*{ box-sizing: border-box; }
html,body{ height: 100%; }
body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color: var(--text);
  line-height: 1.55;

  background-color: var(--bg);

  background-image:
    radial-gradient(1200px 600px at 20% -10%, rgba(125,211,252,.18), transparent 60%),
    radial-gradient(900px 500px at 85% 10%, rgba(167,243,208,.12), transparent 55%),
    radial-gradient(900px 700px at 50% 110%, rgba(125,211,252,.10), transparent 60%);

  background-repeat: no-repeat;        /* <-- critical */
  background-size: cover;             /* <-- critical */
  background-attachment: fixed;       /* <-- makes it stay elegant */
}

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

.container{
  width: min(var(--maxw), calc(100% - 40px));
  margin: 0 auto;
}

/* Topbar */
.topbar{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11,13,18,.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
}
.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
}
.brand-dot{
  width: 12px; height: 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 0 0 3px rgba(125,211,252,.15);
}
.brand-text{ letter-spacing: .2px; }

.nav{
  display: flex;
  gap: 8px;
  align-items: center;
}
.nav-btn{
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  padding: 9px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 14px;
}
.nav-btn:hover{
  color: var(--text);
  border-color: var(--border);
  background: rgba(255,255,255,.04);
}
.nav-btn.is-active{
  color: var(--text);
  border-color: rgba(125,211,252,.35);
  background: rgba(125,211,252,.10);
}

.topbar-actions{
  display: flex;
  align-items: center;
  gap: 10px;
}
.pill{
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--muted);
  font-size: 13px;
}
.pill:hover{ color: var(--text); }

.nav-toggle{
  display: none;
  width: 42px;
  height: 38px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  cursor: pointer;
}
.nav-toggle span{
  display: block;
  height: 2px;
  margin: 6px 10px;
  background: var(--muted);
}

/* Hero */
.hero{
  padding: 34px 0 8px;
}
.hero-grid{
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 28px;
  align-items: center;
}
.avatar-wrap{
  width: 240px;
  height: 240px;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  box-shadow: var(--shadow);
}
.avatar{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-title{
  margin: 0;
  font-size: 44px;
  line-height: 1.1;
  letter-spacing: .2px;
}
.hero-subtitle{
  margin: 8px 0 0;
  font-size: 18px;
  color: var(--muted);
}
.hero-affil{
  margin: 6px 0 0;
  color: var(--muted2);
}

.hero-links{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 10px;
}
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(125,211,252,.35);
  background: rgba(125,211,252,.12);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}
.btn:hover{ text-decoration: none; background: rgba(125,211,252,.18); }
.btn-ghost{
  border-color: var(--border);
  background: rgba(255,255,255,.03);
  color: var(--muted);
}
.btn-ghost:hover{ color: var(--text); background: rgba(255,255,255,.05); }
.btn-small{ padding: 8px 12px; font-size: 13px; }

.hero-blurb{
  margin: 14px 0 10px;
  color: var(--muted);
}

.chips{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.chip{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--muted);
}

/* Main */
.main{ padding: 18px 0 40px; }
.card{
  border: 1px solid var(--border);
  background: rgba(17,21,33,.55);
  backdrop-filter: blur(6px);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin: 16px 0;
}
.card h2{ margin: 0 0 10px; font-size: 22px; }
.card h3{ margin: 14px 0 8px; font-size: 16px; }
.muted{ color: var(--muted); }
.small{ font-size: 13px; color: var(--muted2); }

.grid-2{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 10px;
}

.clean{
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
}
.clean li{ margin: 6px 0; }

/* Timeline */
.timeline{
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
}
.timeline li{
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 14px;
  padding: 10px 0;
  border-top: 1px solid var(--border);
}
.timeline li:first-child{ border-top: none; }
.time{ color: var(--muted2); font-size: 13px; padding-top: 3px; }
.event-title{ font-weight: 650; }
.event{ color: var(--muted); }

/* Pages (tab system) */
.page{ display: none; }
.page.is-active{ display: block; }

/* Research */
.papers{
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 16px;
}
.paper{
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 14px;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: rgba(0,0,0,.12);
  align-items: start;               /* prevents stretching vibes */
}

.paper-img{
  width: 100%;
  aspect-ratio: 16 / 9;  /* gives it a stable height */
  background: black;
  overflow: hidden;
  display: grid;
  place-items: center;
}

.paper-img img,
.paper-video{
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.paper-img.is-missing{
  display: grid;
  place-items: center;
}
.img-fallback{
  display: none;
  color: var(--muted2);
  font-size: 13px;
  padding: 14px;
  text-align: center;
}
.paper-img.is-missing .img-fallback{ display: block; }

.paper-body{
  padding: 14px 14px 16px;
}
.paper-body h3{
  margin: 0;
  font-size: 16px;
  line-height: 1.25;
}
.paper-links{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

/* Publications */
.pubs{
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
}
.pubs li{ margin: 10px 0; }
.pubs a{ text-decoration: underline; text-underline-offset: 3px; }

/* Talks */
.talks{
  display: grid;
  gap: 14px;
  margin-top: 14px;
}
.talk{
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px;
  background: rgba(0,0,0,.10);
}
.talk h3{ margin: 0 0 6px; }
.talk-links{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 10px 0 12px;
}
.video{
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.02);
}
.video iframe{
  width: 100%;
  aspect-ratio: 16/9;
  border: 0;
  display: block;
}

/* Footer */
.footer{
  border-top: 1px solid var(--border);
  padding: 18px 0 26px;
  background: rgba(11,13,18,.55);
}
.footer-inner{
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 820px){
  .hero-grid{ grid-template-columns: 1fr; }
  .avatar-wrap{ width: 180px; height: 180px; border-radius: 22px; }
  .hero-title{ font-size: 36px; }
  .grid-2{ grid-template-columns: 1fr; }
  .paper{ grid-template-columns: 1fr; }
}

@media (max-width: 760px){
  .topbar-actions{ display: none; }
  .nav-toggle{ display: block; }
  .nav{
    display: none;
    position: absolute;
    top: 62px;
    left: 0;
    right: 0;
    margin: 0 auto;
    width: min(var(--maxw), calc(100% - 40px));
    border: 1px solid var(--border);
    background: rgba(11,13,18,.92);
    backdrop-filter: blur(10px);
    padding: 10px;
    border-radius: 16px;
    box-shadow: var(--shadow);
  }
  .nav.is-open{
    display: grid;
    gap: 8px;
  }
  .nav-btn{
    width: 100%;
    justify-content: flex-start;
  }
}