html,
body,
.container {
    height: 95%;
}

body {
    margin: 0;
}

.container {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.box {
    text-align: center;
    font-size: 3em;
    padding: 10px;
}

#next-sunday{
    font-size: 2.5em; 
}


.response{
    font-size: 7em;
}

footer {
    display: flex;
    font-size: 1em;
    justify-content: center;
    margin: 20px;
    flex-direction: column;
}

@media only screen and (max-width: 600px) {
    .box{
        font-size: 1.5em;
    }

    .response{
        font-size: 2.5em !important;
    }

    #next-sunday{
        font-size: 1em;
    }
    footer{
        font-size: 0.8em;
        margin: 5%;
    }
  }