#popup h1 {
    display: none;
}

@media (min-width: 100px) and (max-width: 200px) {
    h1 {
        border-bottom: 10px solid red !important;
    }

    h2 {
        z-index: 999 !important;
    }
}

@media (min-width: 200px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
        margin-bottom: 20px;
        margin-top: 20px;
    }

    #footer h2 {
        margin-top: 0;
    }
}