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

main {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(#0f0fc175, #ed18d887), url("./bg.jpeg");
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

main h1 {
    font-size: 10.0em;
    text-align: center;
    color: white;
}

main p {
    font-size: 3em;
    text-align: center;
    color: white;
    padding: 1rem;
}

#demo {
    font-size: 6em;
    color: white;
    background: green;
    padding: 1rem;
    margin: 2rem;
    margin-top: 4rem;
    text-align: center;
}

@media (max-width: 700px) {
    main h1 {
        font-size: 3em;
    }

    main p {
        font-size: 1rem;
    }

    #demo {
        font-size: 2em;
    }
}