body {
    position: absolute;
}

#first_div {
    margin: 10rem 3rem 12rem 3rem;
    padding: 2rem 2rem 15rem 2rem;
    background-color: white;
    opacity: 80%;
    border: 0.2rem solid rgba(230,173,26,255);
    border-radius: 10px;
    align-items: center;
    position: relative;
    z-index: 1;
}

#first_div h1 {
    text-align: center;

}