html{
  scroll-behavior: smooth;
}
body{

  margin: 0;
  padding: 0;
}
section{
  width: 100%;
  height: 300vh;
  background: url(bg.jpg) no-repeat;
  background-size: cover;
}
.gotopbtn {
    position: fixed;
    width: 50px;
    height: 50px;
    background: #321fdb;
    bottom: 40px;
    right: 50px;
    text-decoration: none;
    text-align: center;
    line-height: 50px;
    color: white;
    font-size: 22px;
}