html {
    font-size: 62.5%;
    height: 100vh;
    width: 100vw;
    background-image: linear-gradient(to right bottom, #71d7f7, #88d1ff, #a8c9ff, #c8c1fd, #e3b8ee);
    background-attachment: fixed;
    color: #ffffff;
    font-family: 'Roboto', sans-serif;
}
html, body {
    position: absolute;
    margin: 0px;
    padding: 0px;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    user-select: none; /* supported by Chrome and Opera */
    -webkit-user-select: none; /* Safari */
    -khtml-user-select: none; /* Konqueror HTML */
    -moz-user-select: none; /* Firefox */
    -ms-user-select: none; /* Internet Explorer/Edge */
}