body {
    background: rgb(34,193,195);
    background: linear-gradient(152deg, rgba(34,193,195,1) 0%, rgba(253,187,45,1) 100%);
    font-family: Arial, Helvetica, sans-serif;
    min-height: 100vh;
}
h1 {
    color: blueviolet;
    text-align: center;
    font-size: 60px;
    font-family: 'Courier New', Courier, monospace;
}

.white {
    background-color: whitesmoke;
}
.big {
    font-size: 40px;
}
.centered {
    text-align: center;
}
#b1 {
    padding: 10px 30px;
}