main{
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 3rem;
    gap: 3rem;
}

iframe {
  position: fixed;   /* stays in place even when scrolling */
  top: 0;
  left: 0;
  width: 100vw;      /* full viewport width */
  height: 100vh;     /* full viewport height */
  border: none;      /* optional: removes border */
  z-index: 9999;     /* ensures it's on top */
}

button{
    width: 20%;
    height: 3rem;
    border-radius: 10px;
    padding: 0px;
    font-size: 2rem;
}