:root{
  --bg: #fdf8f3;
  --text: #5c1a00;
  --muted: #8b4a2a;
  --accent: #e85d1a;
  --accent2: #1a4fa8;
  --shadow: 0 10px 30px rgba(92,26,0,0.08);
  --radius: 18px;
  --max: 1060px;
}

*{ box-sizing: border-box; }
html, body { height: 100%; }

body{
  position: relative;
  overflow-x: hidden;
  background: var(--bg);
}

body::before{
  content: "";
  position: fixed;
  inset: -20%;
  z-index: -1;

  background:
    radial-gradient(900px 650px at 15% 10%, rgba(232,93,26,0.12), transparent 60%),
    radial-gradient(900px 650px at 85% 20%, rgba(0,0,0,0.06), transparent 65%),
    radial-gradient(800px 600px at 30% 90%, rgba(26,79,168,0.08), transparent 65%),
    radial-gradient(800px 600px at 90% 80%, rgba(0,0,0,0.04), transparent 70%);

  filter: blur(16px);
  transform: translate3d(0,0,0);
  animation: bg-wave 18s ease-in-out infinite alternate;
  opacity: 1;
}

@keyframes bg-wave{
  0%{
    transform: translate3d(-1.5%, -1%, 0) scale(1.02);
  }
  50%{
    transform: translate3d(1.2%, 0.6%, 0) scale(1.04);
  }
  100%{
    transform: translate3d(-0.6%, 1.2%, 0) scale(1.03);
  }
}

@media (prefers-reduced-motion: reduce){
  body::before{
    animation: none;
  }
}


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

.wrap{ max-width: var(--max); margin: 0 auto; padding: 22px 18px 64px; }

header{
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: linear-gradient(to bottom, rgba(253,248,243,0.86), rgba(253,248,243,0.65));
  border-bottom: 1px solid rgba(92,26,0,0.07);
}

.nav{
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  user-select:none;
}

.mark{
  width: 28px;
  height: 28px;
  border-radius: 10px;
  background: conic-gradient(from 180deg, rgba(232,93,26,0.95), rgba(26,79,168,0.15), rgba(0,0,0,0.05), rgba(26,79,168,0.75));
  box-shadow: 0 10px 22px rgba(232,93,26,0.16);
}

.brand .name{ font-size: 14.5px; color: var(--text); }
.brand .tag{ font-size: 12.5px; color: var(--muted); margin-left: 6px; }

nav ul{
  list-style:none;
  display:flex;
  gap: 14px;
  padding:0;
  margin:0;
  align-items:center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

nav a{
  font-size: 13.5px;
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 12px;
}

nav a:hover{
  background: rgba(92,26,0,0.05);
  color: var(--text);
}

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding: 11px 14px;
  border-radius: 14px;
  border: 1px solid rgba(92,26,0,0.12);
  background: rgba(255,255,255,0.75);
  box-shadow: 0 10px 22px rgba(92,26,0,0.04);
  color: var(--text);
  font-size: 13.5px;
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
  user-select:none;
}

.btn:hover{
  transform: translateY(-1px);
  background: rgba(255,255,255,0.95);
  border-color: rgba(92,26,0,0.18);
  color: var(--text);
}

.btn.primary{
  background: rgba(232,93,26,0.10);
  border-color: rgba(232,93,26,0.30);
}

.btn.primary:hover{
  background: rgba(232,93,26,0.14);
  border-color: rgba(232,93,26,0.40);
}

main{ padding-top: 26px; }

.hero{
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}


.hero-profile{
  width: 300px;
  height: 350px;
  margin: 14px 10 16px;
  border-radius: 50%;
  object-fit: cover;

  border: 1px solid rgba(92,26,0,0.12);
  box-shadow: 0 8px 20px rgba(92,26,0,0.08);
}

.hero-intro{
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin: 12px 0 18px;
}


@media (max-width: 900px){
  .hero{ grid-template-columns: 1fr; }
  nav ul{ justify-content: flex-start; }
}

@media (max-width: 600px){
  .hero-intro{
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-profile{
    width: 100px;
    height: 95px;
  }
}

.card{
  background: rgba(255,255,255,0.70);
  border: 1px solid rgba(92,26,0,0.10);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card.hl{
  position: relative;
  overflow: hidden;

  background:
    radial-gradient(600px 300px at 20% 20%, rgba(232,93,26,0.10), transparent 60%),
    radial-gradient(500px 280px at 90% 80%, rgba(0,0,0,0.05), transparent 65%),
    #fff;

  border: 1px solid rgba(92,26,0,0.08);
}


.hero-left{
  padding: 22px 22px 20px;
  position: relative;
  overflow: hidden;
}

.kicker{
  font-size: 13.5px;
  color: var(--muted);
  margin: 0 0 8px;
}

h1{
  margin: 0 0 10px;
  font-size: 40px;
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 650;
}

.inline-link{
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(232,93,26,0.45);
  transition: color 120ms ease, border-color 120ms ease;
}

.inline-link:hover{
  color: #e85d1a;
  border-bottom-color: rgba(45,91,255,0.9);
}

.lead{
  margin: 0 0 0px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
  max-width: 70ch;
}

.hero-actions{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.meta{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 13px;
  margin-top: 16px;
}

.pill{
  border: 1px solid rgba(92,26,0,0.12);
  background: rgba(255,255,255,0.55);
  padding: 7px 10px;
  border-radius: 999px;
}

.hero-right{
  padding: 14px;
  display:flex;
  flex-direction: column;
  gap: 10px;
}

.demo{
  border-radius: calc(var(--radius) - 6px);
  border: 1px solid rgba(92,26,0,0.10);
  background: rgba(255,255,255,0.72);
  overflow: hidden;
  min-height: 310px;
  position: relative;
}

canvas{
  width:100%;
  height:100%;
  display:block;
}

.demo-caption{
  display:flex;
  align-items:flex-start;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.tiny{
  font-size: 12.5px;
  color: var(--muted);
}

section{ margin-top: 18px; }

.grid3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

@media (max-width: 900px){
  .grid3{ grid-template-columns: 1fr; }
}

.mini{ padding: 16px 16px 14px; }

.mini h3{
  margin: 0 0 6px;
  font-size: 14.5px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.mini p{
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.5;
}

.section-title{
  display:flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin: 18px 0 10px;
}

.section-title h2{
  margin:0;
  font-size: 18px;
  letter-spacing: -0.02em;
  font-weight: 650;
}

.section-title .hint{
  color: var(--muted);
  font-size: 13px;
}

.highlights{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 900px){
  .highlights{ grid-template-columns: 1fr; }
}

.hl{
  padding: 16px;
  display:flex;
  gap: 14px;
  align-items: flex-start;
}

.thumb{
  width: 84px;
  height: 84px;
  border-radius: 16px;
  border: 1px solid rgba(92,26,0,0.10);
  background: radial-gradient(60px 60px at 30% 30%, rgba(232,93,26,0.18), transparent 60%),
              radial-gradient(80px 80px at 70% 70%, rgba(0,0,0,0.08), transparent 62%),
              rgba(255,255,255,0.65);
  flex: 0 0 auto;
  position: relative;
  overflow: hidden;
}

.thumb::after{
  content:"";
  position:absolute;
  inset: 14px;
  border-radius: 12px;
  border: 1px dashed rgba(92,26,0,0.16);
  opacity: 0.7;
}

.hl h3{
  margin: 0 0 6px;
  font-size: 14.5px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.hl p{
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.5;
}

.links{
  display:flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip{
  font-size: 12.5px;
  color: var(--text);
  border: 1px solid rgba(92,26,0,0.12);
  background: rgba(255,255,255,0.55);
  padding: 7px 10px;
  border-radius: 999px;
}

.chip:hover{
  border-color: rgba(26,79,168,0.38);
  background: rgba(232,93,26,0.10);
  color: var(--text);
}

.about{ padding: 18px 18px 16px; }

.about p{
  margin: 0;
  color: var(--muted);
  font-size: 13.8px;
  line-height: 1.6;
  max-width: 80ch;
}

footer{
  margin-top: 22px;
  padding: 16px 4px 0;
  color: var(--muted);
  font-size: 13px;
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(92,26,0,0.10);
}

.footer-links{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items:center;
}

.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;clip:rect(0,0,0,0);
  border:0;
}
.menu a.active{
  color: var(--text);
  background: rgba(92,26,0,0.06);
  border: 1px solid rgba(92,26,0,0.12);
}

.menu a.active:hover{
  color: var(--text);
}

/* hero-right contact column */
.contact-grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.contact-item{
  padding: 14px 14px 12px;
}

.contact-item h3{
  margin: 0 0 6px;
  font-size: 14.5px;
  font-weight: 650;
}

.contact-item p{
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.45;
}

@media (max-width: 900px){
  .contact-grid{
    grid-template-columns: 1fr;
  }
}

/* mini demos inside Research Interests cards */
.interest{
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mini-demo{
  border-radius: 14px;
  border: 1px solid rgba(92,26,0,0.10);
  background: rgba(255,255,255,0.65);
  overflow: hidden;
  height: 120px;
}

.miniCanvas{
  width: 100%;
  height: 100%;
  display: block;
}


/* project.html */
/* Tabs */
.project-tabs{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tab{
  appearance: none;
  border: 1px solid rgba(92,26,0,0.12);
  background: rgba(255,255,255,0.6);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
}

.tab.active{
  background: rgba(92,26,0,0.06);
  border-color: rgba(92,26,0,0.18);
}

.project-panels{
  margin-top: 14px;
}

.project-panel{
  display: none;
  padding: 18px;
}

.project-panel.active{
  display: block;
}

.panel-head h2{
  margin: 0 0 6px;
}

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

/* Slider */
.slider{
  margin: 8px 0 14px;
}

.slides{
  border-radius: 16px;
  border: 1px solid rgba(92,26,0,0.10);
  overflow: hidden;
  background: rgba(255,255,255,0.55);
}

.slide{
  display: none;
  margin: 0;
}

.slide.is-active{
  display: block;
}

.slide img,
.slide video{
  display: block;
  width: 100%;
  height: auto;
}

.slide figcaption{
  padding: 10px 12px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.45;
  border-top: 1px solid rgba(92,26,0,0.08);
}

.slider-controls{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 10px;
}

.dots{
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  flex: 1;
}

.dot{
  width: 8px;
  height: 8px;
  border-radius: 999px;
  border: 1px solid rgba(92,26,0,0.18);
  background: transparent;
  cursor: pointer;
}

.dot.is-active{
  background: rgba(92,26,0,0.35);
}

.panel-text{
  margin-top: 10px;
}

.panel-links{
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* Project cards (tablist) */
.project-cards{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.proj-card{
  appearance: none;
  border: 1px solid rgba(92,26,0,0.12);
  background: rgba(255,255,255,0.55);
  border-radius: 16px;
  padding: 10px;
  cursor: pointer;
  text-align: left;
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 10px;
  align-items: center;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.proj-card:hover{
  transform: translateY(-1px);
  border-color: rgba(92,26,0,0.18);
  background: rgba(255,255,255,0.75);
}

.proj-card.active{
  border-color: rgba(232,93,26,0.35);
  background:
    radial-gradient(240px 140px at 20% 20%, rgba(232,93,26,0.12), transparent 60%),
    rgba(255,255,255,0.75);
}

.proj-thumb{
  width: 72px;
  height: 54px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(92,26,0,0.10);
  background: rgba(92,26,0,0.04);
}

.proj-thumb img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.proj-title{
  font-weight: 650;
  font-size: 14.5px;
  line-height: 1.25;
}

.proj-sub{
  margin-top: 4px;
  color: var(--muted);
  font-size: 13.2px;
  line-height: 1.35;
}

/* Panels */
.project-panel{
  display: none;
  padding: 18px;
}
.project-panel.active{
  display: block;
}

/* Slider: make it swipe-friendly */
.slider{
  margin: 8px 0 14px;
  outline: none;
}

.slides{
  border-radius: 16px;
  border: 1px solid rgba(92,26,0,0.10);
  overflow: hidden;
  background: rgba(255,255,255,0.55);
  touch-action: pan-y; /* allow vertical scroll, we handle horizontal swipe */
}

.slide{
  display: none;
  margin: 0;
}
.slide.is-active{
  display: block;
}

.slide img,
.slide video{
  display: block;
  width: 100%;
  height: auto;
}

.slider-controls{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 10px;
}

.dots{
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  flex: 1;
}

.dot{
  width: 8px;
  height: 8px;
  border-radius: 999px;
  border: 1px solid rgba(92,26,0,0.18);
  background: transparent;
  cursor: pointer;
}
.dot.is-active{
  background: rgba(92,26,0,0.35);
}

/* Responsive */
@media (max-width: 900px){
  .project-cards{
    grid-template-columns: 1fr;
  }
  .proj-card{
    grid-template-columns: 84px 1fr;
  }
  .proj-thumb{
    width: 84px;
    height: 60px;
  }
}