:root {
    --container-margin: 10px;
    --greybox-min-width: 320px;
    --greybox-max-width: 500px;
}

body::before {
    background: url("../img/boy-child-childhood-346796.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);
    top: 0;
    left: 0;
}

input {
    text-align: center;
}

table th,
table td {
    vertical-align: middle !important;
    text-align: center;
}

svg {
    margin: 0px;
    margin-left: auto;
    margin-right: auto;
}

p {
    font-size: 16px;
}

footer p {
    font-size: 14px;
}

textarea {
    resize: none;
}

.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(--light);
    padding: 20px;
    border-radius: 15px;
}

#instruction,
#notifyRespond {
    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: 70%;
    }
    
}


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

@media (min-width: 768px) {
    #grey-box {
        width: 50%;
    }

}


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

@media (min-width: 992px) {
    /*...*/
    #title span {
        display: inline;
    }
    #title #seperator {
        display: inline;
    }
}


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

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