front.css

*{
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    
}
body {
    overflow: hidden; /* Apply to body to restrict overflow for the entire page */
}
.a{
    width:100%;
    height:100vh;
    background-image: linear-gradient(rgba(0,0,0,0.68),rgba(0,0,0,0.68));
    position: relative;
    padding: 0 5%;
    display: flex;
    justify-content: center;
}
.bvideo{
    position: absolute;
    right : 0;
    bottom : 0;
    z-index : -1;
}

.nav{
    font-family:sans-serif;
    font-size: 1.1vw;
    width:85%;
    margin:10px 0;
    padding:28px 0;
    justify-content:space-between;
    display: flex;
}
.aa ul li{
    list-style: none;
    display: inline-block;
    margin: 0 20px;
    position: relative;

}
.aa ul li a{
    text-decoration: none;
    color: #fff;
    text-transform: uppercase
}
.aa ul li::after{
  content: '';
  height: 3px;
  width: 0;
  background: aqua;
  position: absolute;
  left: 0;
  bottom: -10px;
  transition: 0.5s;
    }
    .aa ul li:hover::after{
        width: 100%;
    }
.logo{
    width: 50px;
    height: 50px;
    cursor: pointer;
}
.hello{
    width: 100%;
    position: absolute;
    top: 50%;
    transform: translatey(-50%);
    text-align: center;
    color:#fff;

}
.c{
    -webkit-text-stroke: 3px black;
    font-size: 3vw;
    text-decoration: underline;
    text-decoration-color: aqua;
    text-decoration-thickness: 1px;
    text-underline-offset: 8px;
}
.y{
    font-size: 0.8vw;
    font-family:cursive;
}
.w{
    font-family:monospace;
    font-size: 0.9vw;
}
.button{
    width: 200px;
    padding: 11px 0;
    text-align: center;
    margin: 1px 220px;
    border-radius: 25px;
    background-color: aqua;
    font-weight: bold;
    border: 2px solid #009688;
    background: transparent;
    color: #fff;
    cursor:hand;
    text-decoration: none;
    position: absolute;
}
.button:hover span {
    padding-right: 25px;
  }
  .button:hover span:after {
    opacity: 1;
    right: 0;
  }
  .button span {
    cursor: pointer;
    display: inline-block;
    position: relative;
    transition: 0.5s;
  }
  
  .button span:after {
    content: '\00bb';
    position: absolute;
    opacity: 0;
    top: 0;
    right: -20px;
    transition: 0.5s;
  }