body{
  font-family:'Inter', sans-serif;
}

h1,h2,h3{
  font-family:'Space Grotesk', sans-serif;
}
:root{
  --bg:#020617;
  --bg-soft:#0b1220;
  --glass:rgba(255,255,255,0.05);
  --glass-strong:rgba(255,255,255,0.08);
  --text:#e6edf3;
  --muted:#94a3b8;
  --accent:#4da3ff;
  --accent-2:#7c5cff;
  --border:rgba(255,255,255,0.08);
}
.nav-item{
  display:flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  border-radius:10px;
  color:var(--muted);
  text-decoration:none;
  transition:all 0.3s ease;
  position:relative;
}

.nav-item i{
  width:18px;
  height:18px;
}

.nav-item:hover{
  color:var(--text);
  background:rgba(255,255,255,0.06);
  transform:translateY(-2px);
}

.nav-item:hover i{
  stroke:var(--accent);
}

.nav-item::after{
  content:"";
  position:absolute;
  bottom:0;
  left:10%;
  width:0%;
  height:2px;
  background:linear-gradient(90deg, var(--accent), var(--accent-2));
  transition:0.3s;
}

.nav-item:hover::after{
  width:80%;
}

/* GLOBAL RESET */
*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}

body{
  font-family:'Inter',system-ui;
  color:var(--text);
  background:
    radial-gradient(circle at 20% 20%, rgba(124,92,255,0.15), transparent 40%),
    radial-gradient(circle at 80% 0%, rgba(77,163,255,0.12), transparent 40%),
    var(--bg);
  min-height:100vh;
  line-height:1.6;
  overflow-x:hidden;
}

/* SMOOTH SCROLL */
html{
  scroll-behavior:smooth;
}

/* CONTAINER */
.container{
  max-width:1100px;
  margin:60px auto;
  padding:0 20px;
}

/* HEADINGS */
.section h2{
  font-size:1.6rem;
  margin-bottom:14px;
  border-left:4px solid var(--accent);
  padding-left:14px;
  letter-spacing:0.5px;
}

/* GLASS CARD */
.card{
  position:relative;
  background:var(--glass);
  backdrop-filter:blur(18px);
  border:1px solid var(--border);
  border-radius:18px;
  padding:22px;
  margin-top:22px;
  transition:all 0.35s cubic-bezier(.2,.8,.2,1);
  box-shadow:0 10px 40px rgba(0,0,0,0.6);
}

/* CARD GLOW BORDER */
.card::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  padding:1px;
  background:linear-gradient(120deg, transparent, rgba(124,92,255,0.3), transparent);
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  opacity:0;
  transition:0.4s;
}

.card:hover::before{
  opacity:1;
}

.card:hover{
  transform:translateY(-6px) scale(1.01);
  box-shadow:0 25px 80px rgba(0,0,0,0.9);
}

.card h3{
  font-size:1.25rem;
  color:var(--accent);
}

/* PAPER CARD (PREMIUM) */
.paper-card{
  position:relative;
  background:linear-gradient(160deg, rgba(255,255,255,0.05), rgba(255,255,255,0.01));
  backdrop-filter:blur(16px);
  border-radius:18px;
  padding:24px;
  margin-top:22px;
  border:1px solid var(--border);
  overflow:hidden;
  transition:all 0.4s ease;
}

/* MOVING LIGHT EFFECT */
.paper-card::after{
  content:"";
  position:absolute;
  width:200%;
  height:200%;
  top:-50%;
  left:-50%;
  background:linear-gradient(
    120deg,
    transparent,
    rgba(255,255,255,0.06),
    transparent
  );
  transform:rotate(25deg);
  opacity:0;
  transition:0.6s;
}

.paper-card:hover::after{
  opacity:1;
  animation:shine 1.2s linear;
}

@keyframes shine{
  from{transform:translateX(-100%) rotate(25deg);}
  to{transform:translateX(100%) rotate(25deg);}
}

.paper-card:hover{
  transform:translateY(-8px);
  border-color:rgba(124,92,255,0.35);
}

/* TEXT */
.paper-card h3{
  font-size:1.25rem;
  color:var(--accent-2);
}

.paper-meta{
  font-size:0.85rem;
  color:var(--muted);
  margin:8px 0;
}

.paper-abstract{
  margin-bottom:14px;
}

/* LINK */
.paper-link{
  font-weight:600;
  color:var(--accent);
  text-decoration:none;
  position:relative;
}

.paper-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:0%;
  height:2px;
  background:var(--accent);
  transition:0.3s;
}

.paper-link:hover::after{
  width:100%;
}

/* LIST */
ul.academic-list{
  margin-left:20px;
  margin-top:10px;
  color:var(--muted);
}

ul.academic-list li{
  margin-bottom:8px;
}

/* TAG */
.version-tag{
  display:inline-block;
  padding:6px 12px;
  border-radius:999px;
  background:var(--glass-strong);
  border:1px solid var(--border);
  font-size:0.8rem;
}

/* BUTTON STYLE (OPTIONAL ADD) */
.button{
  display:inline-block;
  padding:10px 18px;
  border-radius:10px;
  background:linear-gradient(135deg, var(--accent), var(--accent-2));
  color:white;
  text-decoration:none;
  font-weight:600;
  transition:0.3s;
}

.button:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 25px rgba(124,92,255,0.4);
}

/* GLOW TEXT */
@keyframes glow{
  0%{text-shadow:0 0 0 rgba(77,163,255,0)}
  50%{text-shadow:0 0 18px rgba(77,163,255,0.35)}
  100%{text-shadow:0 0 0 rgba(77,163,255,0)}
}

a.pulse{
  animation:glow 2.5s infinite;
}

/* RESPONSIVE */
@media (max-width:820px){
  .container{
    margin:40px auto;
    padding:0 14px;
  }
}
/* HERO */
.hero{
  margin-bottom:60px;
}

.hero-title{
  font-size:3.2rem;
  font-weight:700;
  letter-spacing:-1px;
}

.hero-sub{
  margin-top:12px;
  color:var(--muted);
  max-width:600px;
}

.hero-actions{
  margin-top:20px;
  display:flex;
  gap:12px;
}

.button.ghost{
  background:transparent;
  border:1px solid var(--border);
}

/* CRED */
.cred{
  display:flex;
  gap:20px;
  margin:30px 0;
  color:var(--muted);
  font-size:0.9rem;
}

/* HIGHLIGHT */
.highlight{
  border:1px solid rgba(124,92,255,0.4);
  box-shadow:0 0 40px rgba(124,92,255,0.2);
}

/* PAGE TRANSITION */
body{
  opacity:0;
  transition:opacity 0.4s ease;
}

body.loaded{
  opacity:1;
}

/* ACTIVE NAV */
.nav-item.active{
  color:var(--text);
  background:rgba(255,255,255,0.08);
}
/* SCROLL REVEAL */
.reveal{
  opacity:0;
  transform:translateY(40px);
  transition:all 0.8s cubic-bezier(.2,.8,.2,1);
}

.reveal.active{
  opacity:1;
  transform:translateY(0);
}

/* CURSOR GLOW */
.cursor-glow{
  position:fixed;
  width:300px;
  height:300px;
  background:radial-gradient(circle, rgba(124,92,255,0.15), transparent 60%);
  pointer-events:none;
  transform:translate(-50%, -50%);
  z-index:0;
}

/* NAV SCROLL EFFECT */
.nav{
  position:sticky;
  top:10px;
  z-index:100;
  transition:all 0.3s ease;
}

.nav.scrolled{
  background:rgba(2,6,23,0.7);
  backdrop-filter:blur(18px);
  box-shadow:0 10px 30px rgba(0,0,0,0.6);
}

/* 3D CARD HOVER */
.card{
  transform:perspective(1000px) rotateX(0) rotateY(0);
  transition:transform 0.3s ease, box-shadow 0.3s;
}

.card:hover{
  transform:perspective(1000px) rotateX(4deg) rotateY(-4deg) scale(1.02);
}

/* BUTTON RIPPLE */
.button{
  position:relative;
  overflow:hidden;
}

.button::after{
  content:"";
  position:absolute;
  width:0;
  height:0;
  background:rgba(255,255,255,0.2);
  border-radius:50%;
  transform:translate(-50%, -50%);
  transition:width 0.4s, height 0.4s;
}

.button:active::after{
  width:200px;
  height:200px;
}

/* HERO GRADIENT */
.hero-title{
  background:linear-gradient(90deg, #4da3ff, #7c5cff);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  animation:gradientMove 5s infinite linear;
}

@keyframes gradientMove{
  0%{background-position:0%}
  100%{background-position:200%}
}