:root {
    --container-margin: 10px;
    --greybox-min-width: 250px;
    --greybox-max-width: 900px;
}

body::before {
    background: url("../img/photo-nic-co-uk-nic-224385-unsplash.jpg");
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    content: "";
    z-index: -1;
    width: 100%;
    height: 100%;
    position: fixed;
    -webkit-filter: blur(5px);
    -moz-filter: blur(5px);
    -o-filter: blur(5px);
    -ms-filter: blur(5px);
    filter: blur(5px);
    -webkit-filter: grayscale(100%);
    -moz-filter: grayscale(100%);
    -o-filter: grayscale(100%);
    -ms-filter: grayscale(100%);
    filter: grayscale(100%);
    top: 0;
    left: 0;
}

textarea {
    resize: none;
}

footer p {
    font-size: 14px;
}

.container {
    display: flex;
    justify-content: center;
    max-width: calc(100% - var(--container-margin)*2);
    min-height: calc(100% - var(--container-margin)*2);
    padding: 0px;
    margin: var(--container-margin);
}

#grey-box {
    min-width: var(--greybox-min-width);
    max-width: var(--greybox-max-width);
    width: 100%;
    text-align: center;
    background-color: var(--dark);
    padding: 20px;
    border-radius: 15px;
}

.text-muted {
    color: var(--white) !important;
}

.invalid-feedback,
#requestBoxBody p {
    white-space: pre-line;
}

.word-group {
    display: block;
}

#seperator {
    display: none;
}


/*Small devices (landscape phones, 576px and up)*/

@media (min-width: 576px) {
     :root {
        --container-margin: 40px;
    }
    #grey-box {
        width: 90%;
    }
    #title span {
        display: inline;
    }
    #title #seperator {
        display: inline;
    }
}

/*Medium devices (tablets, 768px and up)*/

@media (min-width: 768px) {

    #grey-box {
        width: 80%;
    }
}

/*Large devices (desktops, 992px and up)*/

@media (min-width: 992px) {

    #grey-box {
        width: 75%;
    }
}

/*Extra large devices (large desktops, 1200px and up)*/

@media (min-width: 1200px) {
    ...
}