long.css

@import url("https://fonts.googleapis.com/css2?family=Inria+Serif:wght@700&display=swap");
@import url('https://fonts.googleapis.com/css2?family=Inria+Serif&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Lato:wght@300&display=swap');
html {
  font-size: 10px;
}
body {
  margin: 0px;
  padding: 0px 0px 0px 0px;
  background-color: black;
}
.navvar {
    z-index: -1;
  text-align: center;
  font-family: "Inria Serif", serif;
  background-color: rgba(37, 36, 36, 0.5);
  color: white;
  font-size: 3rem;
  padding: 1rem;
}
.navimg {
  padding: 0px;
}
.st {
    position: relative;
    bottom: 25rem;
    width: 100vw;
    z-index: -10;
}
.op{
  font-family: 'Inria Serif', serif;
  text-align: center;
  font-family: "Inria Serif", serif;
  font-size: 30px;
  color: white;
  position: relative;
  bottom: 19rem;
  max-width: 45ch;
  left: 35rem;
}
.pen{
  display: flex;
  gap: 9rem;
  justify-content: center;
}
.b1 {
  font-family: 'Lato', sans-serif;
  color: #fff;
  font-size: 10rem;
  border: 3px solid #C274ED;
  background-image: -webkit-linear-gradient( 30deg, #C274ED 50%, transparent 50% );
  background-image: linear-gradient(30deg, #C274ED 50%, transparent 50%);
  background-size: 500px;
  background-repeat: no-repeat;
  background-position: 0%;
  -webkit-transition: background 500ms ease-in-out;
  transition: background 500ms ease-in-out;
}
.B {
  font-family: 'Lato', sans-serif;
  font-size: 2.5rem;
  width: fit-content;
  padding: 0.5rem 1.5rem;
  text-align: center;
  color: #000;
  text-transform: uppercase;
  font-weight: 600;
  cursor: pointer;
  display: inline-block;
  border-radius: 50px;
}
.b1:hover {
  background-position: 100%;
  color: #fff;
}