body{
    background: #000000;
    background: -webkit-linear-gradient(bottom right, #000000, #79D2FF);
    background: -moz-linear-gradient(bottom right, #000000, #79D2FF);
    background: linear-gradient(to top left, #000000, #79D2FF);
}

.filling {
    background: #000000;
    background: -webkit-linear-gradient(bottom right, #000000, #79fff4);
    background: -moz-linear-gradient(bottom right, #000000, #79fff4);
    background: linear-gradient(to top left, #000000, #79fff4);
    flex-grow: 1;
    align-self: stretch;
}
@media screen and (max-width: 600px) {
    .filling {
        flex-grow: 0;
    }
  }

body, html {
    
    height: 100vh;
    margin: 0;
    box-sizing: border-box;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

.split {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

main {
    text-align: center;
    font-size: larger;
    background-color: rgba(255, 255, 255, 0.24);
    backdrop-filter: blur(10px);
    padding: 1em;
}