body {
    margin: 0;
    height: 100vh;

    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    font-family: Arial, sans-serif;

    background-color: darkblue; /* background */
}

h1 {
    color: red;        /* welcome text */
    font-size: 60px;   /* large size */
    margin-bottom: 10px;
}

p {
    color: green;      /* description text */
    font-size: 20px;
}