*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family:'Poppins',sans-serif;
}

body{
  background:linear-gradient(135deg,#0f2027,#203a43,#2c5364);
  color:white;
  padding-top:80px;
}

/* ===== NAVBAR ===== */
nav{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:20px 50px;
  position:fixed;
  top:0;
  width:100%;
  background:rgba(0,0,0,0.4);
  z-index:1000;
}

nav h1{
  color:#00f2ff;
}

nav ul{
  display:flex;
  gap:25px;
  list-style:none;
}

nav ul li{
  cursor:pointer;
}

.menu-btn{
  display:none;
  font-size:25px;
  cursor:pointer;
}

/* MOBILE */
@media(max-width:768px){
  .menu-btn{display:block;}

  nav ul{
    display:none;
    flex-direction:column;
    position:absolute;
    right:20px;
    top:60px;
    background:#111;
    padding:15px;
    border-radius:10px;
  }

  nav ul.show{
    display:flex;
  }
}

/* ===== HERO ===== */
.hero{
  height:100vh;
  display:flex;
  justify-content:center;
  align-items:center;
  position:relative;
}

.hero-glow{
  position:absolute;
  width:400px;
  height:400px;
  background:radial-gradient(circle,#00f2ff,transparent);
  filter:blur(100px);
  opacity:0.5;
}

.hero-card{
  padding:40px 60px;
  background:rgba(0,0,0,0.5);
  border-radius:20px;
  backdrop-filter:blur(20px);
  text-align:center;
  box-shadow:0 0 40px rgba(0,242,255,0.3);
}

.hero-card h1{
  color:#00f2ff;
  font-size:42px;
  font-weight:bold;
  margin-bottom:10px;
}

.hero-card p{
  color:#ffffff;
  font-size:16px;
  margin-bottom:20px;
}

.hero-buttons{
  display:flex;
  justify-content:center;
  gap:15px;
  margin-top:15px;
}

.btn{
  padding:10px 25px;
  border:none;
  background:#00f2ff;
  cursor:pointer;
  border-radius:5px;
  transition:0.3s;
}

.btn:hover{
  background:#00c6d1;
}

.btn.secondary{
  background:transparent;
  border:1px solid #00f2ff;
}

/* STATS */
.hero-stats{
  margin-top:20px;
  display:flex;
  justify-content:center;
  gap:20px;
  font-size:14px;
  color:#ddd;
}

/* ===== SECTIONS ===== */
.section{
  padding:100px 50px;
}

/* ===== CARDS ===== */
.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:20px;
}

.card{
  padding:20px;
  background:rgba(255,255,255,0.05);
  border-radius:10px;
  transition:0.3s;
}

.card:hover{
  transform:translateY(-5px);
}

/* ===== CONTACT ===== */
.contact{
  display:flex;
  flex-direction:column;
  align-items:center;
}

form{
  width:100%;
  max-width:500px;
  display:flex;
  flex-direction:column;
  gap:15px;
}

input, textarea{
  width:100%;
  padding:12px;
  border-radius:6px;
  border:none;
  font-size:14px;
}

.btn{
  width:100%;
  font-size:16px;
}

/* ===== FOOTER ===== */
.footer{
  margin-top:60px;
  padding:50px 20px;
  background:rgba(0,0,0,0.5);
  text-align:center;
}

.footer h2{
  color:#00f2ff;
  margin-bottom:10px;
}

.footer p{
  font-size:14px;
  margin-bottom:15px;
  color:#ccc;
}

.social-links{
  display:flex;
  justify-content:center;
  gap:20px;
}

.social-links a{
  font-size:20px;
  color:#00f2ff;
  transition:0.3s;
}

.social-links a:hover{
  transform:scale(1.3);
  color:white;
}
/* ===== PUBLICATION SECTION ===== */
#publications {
  text-align: left;
}

.pub-card {
  text-align: left;
  padding: 25px;
  background: rgba(255,255,255,0.05);
  border-radius: 15px;
  transition: 0.3s;
  box-shadow: 0 0 20px rgba(0,0,0,0.2);
}

.pub-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 25px rgba(0,242,255,0.3);
}

/* TITLE */
.pub-card h3 {
  color: #00f2ff;
  margin-bottom: 10px;
  font-size: 18px;
}

/* TEXT */
.pub-card p {
  font-size: 14px;
  color: #ccc;
  margin-bottom: 10px;
}

/* BUTTONS CONTAINER */
.pub-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 15px;
}

/* BUTTON STYLE */
.pub-buttons .btn {
  padding: 8px 15px;
  font-size: 14px;
  border-radius: 5px;
}

/* SECONDARY BUTTON */
.pub-buttons .secondary {
  background: transparent;
  border: 1px solid #00f2ff;
}

/* HOVER EFFECT */
.pub-buttons .btn:hover {
  transform: scale(1.05);
}
/* REMOVE DEFAULT LINK STYLE */
a {
  text-decoration: none;
  color: inherit;
}

/* CLICKABLE CARD */
.cards a.card {
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: #00f2ff;
  font-weight: 500;
  transition: 0.3s;
}

/* HOVER EFFECT */
.cards a.card:hover {
  color: white;
  transform: translateY(-5px) scale(1.03);
  box-shadow: 0 0 20px rgba(0,242,255,0.4);
}

/* CARD UPGRADE */
.card {
  padding: 20px;
  border-radius: 12px;
  background: rgba(255,255,255,0.05);
  transition: 0.3s;
}
/*  UPGRADE */
.cards a.card {
  display:flex;
  justify-content:center;
  align-items:center;
  text-align:center;
  font-weight:600;
  font-size:15px;
  color:#00f2ff;
}
nav h1 {
  font-size: 24px;
  font-weight: bold;
  letter-spacing: 1px;
}
.section {
  padding: 120px 60px;
}
#certification .card {
  border: 1px solid rgba(0,242,255,0.2);
}
.card:hover {
  transform: translateY(-8px) scale(1.03);
  box-shadow: 0 0 25px rgba(0,242,255,0.4);
}

.btn.secondary {
  background: transparent;
  border: 1px solid #00f2ff;
  color: #00f2ff;
}