:root {
  --bg-dark: #0b0f1f;           
  --bg-section: #141b2d;        
  
  --primary: #00bfff;           
  --secondary: #403552;        
  --accent: #4c6d94;            
  
  --gradient: linear-gradient(135deg, #00bfff,  #443b53 60%);
  --gradient-hover: linear-gradient(135deg, #00d4ff,  #5e4f79);
  
  --text-primary: #f0f9ff;      
  --text-secondary: #c7d2fe;    
  
  --border: #33415588;          
  --shadow-glow: 0 0 30px rgba(0, 191, 255, 0.25); 
}
 
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "montserrat";
  color: #fff;
}

html,
/* .... */
body{
overflow-x:hidden;
color:#fff;
}
/* ... */
body {
  height: 100%;

  width: 100%;
}

 body::-webkit-scrollbar{
display:block;
width:8px;
background:var(--primary);
}

body::-webkit-scrollbar-thumb{
background:var(--accent);
border-radius:50px;
}


body {
  overflow-x: hidden;
}
/* ........Cursor........... */

 /* .....navbar......... */
#nav {
  height: 130px;
  width: 100%;
  background: #000;
  display: flex;
  align-items: center;
  padding: 0 80px;
  position: fixed;
  justify-content: space-between;
  flex-wrap: nowrap;
  z-index: 999;
}
#nav img {
  height: 3.5vw;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}

#nav h4 {
  text-transform: uppercase;
  font-weight: 500;
  cursor: pointer;
  font-size: 1.15vw;
}

#nav a {
  text-decoration: none;
  color: inherit;
}

#nav a:hover h4 {
  text-decoration: none;
}
/* ........background video......... */
video {
  min-height: 100vh;
  width: 100%;
  object-fit: cover;
  z-index: -1;
  position: fixed;
  filter: blur(4px);
  opacity: 0.89;
}

#main {
  position: relative;
  background-color: rgba(0, 0, 0, 0.39);
  margin-top: 130px; /* Prevents hero section from being hidden behind navbar */
  min-height: calc(100vh - 130px - 40vh); /* fill viewport minus navbar and footer */
}
/* .......about page 1......... */
#page1 {
  min-height: 70vh;
  width: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
  z-index: 10;
  padding: 48px 0 32px 0;
}
#page1 h1 {
  font-size: 4vw;
  font-weight: 800;
  position: relative;
}
#page1 h1::before {
  
  position: absolute;
 
  top: -4px;
  left: -4px;
  font-size: 4vw;
  opacity: 0.55;
  
  z-index: -1;
}
#page1 h2 {
  color: #cacaca;
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 8px;
  margin-bottom: 14px;
}
#page1 p {
  font-size: 1.2rem;
  font-weight: 400;
  width: 40%;
}

#page1 .date-location {
  font-size: 1.3rem;
  font-weight: 600;
  margin-top: 15px;
  width: 45%;
}
/* ...........buttons........... */
.hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-top: 80px;
  flex-wrap: wrap;
}

.btn-dull {
  background-color: transparent;
  color: #fff;
  border: 2px solid #888;
  padding: 10px 20px;
  font-size: 1.2vw;
  font-weight: 500;
  border-radius: 25px;
  cursor: pointer;
}

.btn-highlight {
  background-color: transparent;
  color: #fff;
  border: 2px solid var(--primary);
  padding: 10px 20px;
  font-size: 1.2vw;
  font-weight: 500;
  border-radius: 25px;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0, 191, 255, 0.5);
}


#page2 {
  min-height: 70vh;
  width: 100%;
  padding-top: 48px;
  z-index: 10;
}

#scroller {
 
  white-space: nowrap;
  overflow-x: auto;
  overflow-y: hidden;
  position: relative;
  z-index: 10;
}
#scroller::-webkit-scrollbar {
  display: none;
}
#scroller-in {
  display: inline-block;
  white-space: nowrap;
  animation-name: scroll;
  animation-duration: 40s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

#scroller h4 {
  display: inline-block;
  font-size: 120px;
  font-weight: 900;
  font-family: gilroy;
  margin-right: 20px;
  transition: all linear 0.3s;
  color: #000;
  -webkit-text-stroke: 2px #ffffff;
}
#scroller h4:hover {
 
  color:var(--primary);
-webkit-text-stroke:2px var(--primary);
}

@keyframes scroll {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-100%);
  }
}

#about-us {
  width: 100%;
  min-height: 50vh;
  padding: 36px 0 24px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  align-items: flex-start;
  justify-content: center;
  position: relative;
  z-index: 10;
}

#about-us-in {
  max-width: 980px;
  width: 100%;
  text-align: center;
}
#about-us-in h3 {
  font-size: 2.6rem;
  font-weight: 700;
  margin-bottom: 18px;
  text-align: center;
}
#about-us-in p {
  max-width: 780px;
  margin: 0 auto;
  font-size: 20px;
  line-height: 30px;
  white-space: normal;
  text-align: justify;
  text-align-last: center;
  hyphens: auto;
  word-break: normal;
}

#cards-container {
  
  height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 70px;
  position: relative;
  z-index: 10;
}
.card {
  height: 80%;
  width: 24%;

  border-radius: 20px;
  background-size: cover;
  background-position: center;
  overflow: hidden;
  transition: all ease 0.6s;
}

 #card1{
background-image:url(Assests/3d-perception.jpg);
}

#card2{
background-image:url(Assests/autonomous-ai.jpg);
}

#card3{
background-image:url(Assests/3d-perception.jpg);
}
.overlay {
  height: 100%;
  width: 100%;

  background:var(--gradient);
  padding: 20px;
  padding-top: 140px;
  opacity: 1;
  transition: all ease 0.6s;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}
.overlay h4 {
  color: #000;
  font-size: 20px;
  text-transform: uppercase;
  white-space: nowrap;
  margin-bottom: 20px;
  font-weight: 800;
  text-align: center;
}
.overlay p {
  color: #000;
  font-size: 16px;
}
.card:hover .overlay {
  opacity: 1;
}
.card:hover {
  transform: rotate3d(-1, 1, 0, 20deg);
}



#page3 {
  min-height: 70vh;
  width: 100%;
  background-color: #000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 48px 0 32px 0;
}

#page3 .section-title {
  font-size: 2.6rem;
  margin-top: 48px;
  margin-bottom: 18px;
  text-align: center;
}

#page3 .schedule {
  width: 60%;
  max-width: 600px;
  margin-left: 0;
  padding-left: 0;
  margin: 0 auto 0 auto;
}

#page3 .schedule p {
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.7;
  text-align: lefteft;
  margin: 0;
}

#page3 img {
  position: absolute;
  height: 32px;
}
#page3 #colon1 {
  left: 15%;
  top: 25%;
}
#page3 #colon2 {
  right: 15%;
  bottom: 15%;
}

  #page4 {
  min-height: 70vh;
  width: 100%;
  background-color: #000; 
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 0 32px 0;
  font-family: 'Inter', sans-serif;
}

#page4 h1 {
  font-size: 2.2rem;
  color: #fff;
  margin-bottom: 28px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.5px;
}

#organizers-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 900px;
  width: 100%;
}

#program-committee-section h1 {
  font-size: 2.2rem;
  color: #fff;
  margin-bottom: 28px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-align: center;
}

#program-committee-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 900px;
  width: 100%;
  margin: 0 auto 40px auto;
}

.organizer-card {
  background: linear-gradient(180deg, #121212 0%, #080808 100%);
  border: 1px solid #222;
  border-radius: 14px;
  padding: 22px 10px 16px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: border 0.3s ease;
  position: relative;
  overflow: hidden;
  min-width: 0;
  min-height: 0;
}


.organizer-card:hover {
  border: 1.5px solid #3b82f6; 
}

.img-wrapper {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin-bottom: 12px;
  overflow: hidden;
  border: 2.5px solid transparent;
}


.organizer-card.featured .img-wrapper {
  border-color: #3b82f6;
}

.img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(20%);
}

.card-info h3 {
  color: #fff;
  font-size: 1.05rem;
  font-weight: 550;
  line-height: 1.7;
  text-align: center;
  margin: 0 auto;
}

.card-info .role {
  color: #4c8bf5;
  font-size: 0.78rem;
  font-weight: 500;
  margin-bottom: 2px;
}

.card-info .univ {
  color: #888;
  font-size: 0.8rem;
}
#footer {
  height: 40vh;
  width: 100%;
  background:linear-gradient(135deg,#0B0F1A,#11182B);
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  gap: 6.5vw;
  padding: 0 100px 30px 100px;
  box-sizing: border-box;
  margin-top: auto;
}
#footer > img {
  position: absolute;
  left: 0;
  bottom: 0%;
  height: 100%;
  z-index: 0;
}
#f1 img {
  height: 80px;
  width: auto;
  object-fit: contain;
  position: relative;
  z-index: 99;
  margin-left: auto;
  margin-bottom: 0;
  align-self: flex-end;
}
#f2 h3 {
  font-size: 1.6vw;
  white-space: nowrap;
  text-transform: uppercase;
  color: #000;
  font-weight: 900;
  margin-bottom: 8px;
}

#f3 h3 {
  font-size: 1.6vw;
  white-space: nowrap;
  text-transform: uppercase;
  color: #000;
  font-weight: 800;
  margin-bottom: 8px;
}
#f4 h4 {
  font-size: 1.2vw;
  white-space: nowrap;
  text-transform: uppercase;
  color: #ffffff;
  font-weight: 600;
  line-height: 20px;
  margin-bottom: 8px;
}
#call-for-papers{
  padding: 48px 0 32px 0;
  text-align: center;
}

#call-for-papers h2{
  font-size: 2.6rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.cfp-intro{
  max-width: 600px;
  margin: 0 auto 18px auto;
  font-size: 1rem;
  margin-bottom: 18px;
}

.cfp-grid{
  display: flex;
  gap: 28px;
  justify-content: center;
  flex-wrap: wrap;
}

.cfp-box{
background:var(--bg-section);
border:1px solid var(--primary);
/* background:#111; */
padding:30px;
border-radius:20px;
width:420px;
text-align:left;

}

.cfp-box h3{

font-size:20px;
margin-bottom:20px;

color:var(--primary);

}

.cfp-box ul{
font-size:14px;

padding-left:10px;

}

.cfp-box li{

margin-bottom:5px;

}

.deadline{

margin-top:20px;
font-size:20px;

background:var(--gradient);
}

.cfp-button{

display:inline-block;
margin-top:20px;
padding:10px 25px;

background:var(--accent);
color:black;
font-weight:600;
border-radius:30px;
text-decoration:none;

}

.cfp-button:hover{

background:white;

}
#key-topics{

padding:100px 80px;
text-align:center;

}

.section-title{

font-size:50px;
font-weight:900;
margin-bottom:60px;

}

.topics-grid{

display:grid;
grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
gap:20px;
max-width:1000px;
margin:auto;

}

.topic-card{
background:var(--bg-section);
border:1px solid var(--primary);

padding:18px 20px;
border-radius:12px;
font-size:18px;
font-weight:600;
transition:0.3s;

}

.topic-card:hover{
background:var(--gradient);
color:white;
transform:translateY(-5px);

transform:translateY(-5px);

}
  
#colon1 {
  filter: invert(57%) sepia(98%) saturate(7452%) hue-rotate(180deg) brightness(100%) contrast(100%);
}

#colon2 {
  filter: invert(57%) sepia(98%) saturate(7452%) hue-rotate(180deg) brightness(100%) contrast(100%);
}