* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;
}

.center {
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

::selection {
    color: gray;
}