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

body{
    font-family:sans-serif, Arial, Helvetica;
}
main{
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    text-align: center;
}
div h1{
    margin-bottom: 10px;
}