form[action*="thankyoupage"] .content,
form[action*="thankyouPage"] .content {
    text-align: center;
    font-size: 1.5em;
    line-height: 1.4em;
    padding-top: 200px;
    padding-bottom: 200px;
}

form[action*="thankyoupage"] .cover .big-text,
form[action*="thankyouPage"] .cover .big-text {
    font-size: 1em;
    color: transparent;
}

form[action*="thankyoupage"] .cover .big-text:before,
form[action*="thankyouPage"] .cover .big-text:before {
    content: 'Message Sent';
    display: block;
}

form[action*="thankyoupage"] .content .container:before,
form[action*="thankyouPage"] .content .container:before {
    content: '\f00c';
    font-family: 'FontAwesome';
    font-size: 3em; 
    margin: 0 0 0.5em 0;
    display: block;
}

@media screen and (max-width:840px) {
    form[action*="thankyoupage"] .content,
    form[action*="thankyouPage"] .content {
        padding-top: 100px;
        padding-bottom: 100px;
    }
}