*{
    margin: 0;
    padding: 0;
}
.button{
    width: 3.5rem;
    height: 3.5rem;
    margin: 5px;
    font-size: 1.5rem;
    cursor: pointer;
    background-color: black;
    color: blanchedalmond;
    border: none;
}
.button:hover{
    background-color:whitesmoke;
    color:black;
    box-shadow: black;
}
.textview{
    width: 15.7rem;
    margin: 5px;
    font-size: 2rem;
    padding: 5px;
}
.main{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
}
.background{
    background:linear-gradient(to right,green,rgba(0, 0, 255, 0.692));
    height: 100vh;
}