classes.css

@media (max-width: 768px) {
    .img-site {
        width: 288px;
        height: 180px;
    }
    .clearButton {
        width: 300px;
        height: 45px;
    }
}

@media (max-width: 1100px) {
    .position-50x50-text {
        width: 80%;
    }
    .position-50x50-img {
        width: 80%;
    }
}

@media (min-width: 1100px) {
    .position-50x50-text {
        width: 48%;
    }
    .position-50x50-img {
        width: 48%;
    }
}

@media (min-width: 768px) {
    .img-site {
        width: 480px;
        height: 300px;
    }
    .clearButton {
        width: 450px;
        height: 70px;
    }
    .clearButton:hover {
        animation: slidein 2s;
        -moz-animation: slidein 1s;
        /* Firefox */
        -webkit-animation: slidein 1s;
        /* Safari e Chrome */
        -o-animation: slidein 1s;
        /* Opera */
        width: 500px;
    }
    .clearButton:not(:hover) {
        -moz-animation: slideout 0.5s;
        /* Firefox */
        -webkit-animation: slideout 0.5s;
        /* Safari e Chrome */
        -o-animation: slideout 0.5s;
        /* Opera */
    }
}

.social-media {
    text-align: center;
    text-transform: uppercase;
}

.social-media-icon {
    width: 100px;
    height: 100px;
    display: inline;
    border-radius: 100%;
    margin: 20px;
}

.social-media-icon:hover {
    -moz-animation: upperIMG 1s;
    /* Firefox */
    -webkit-animation: upperIMG 1s;
    /* Safari e Chrome */
    -o-animation: upperIMG 1s;
    /* Opera */
    transform: scale(1.1);
}

.social-media-icon:not(:hover) {
    -moz-animation: downIMG 0.5s;
    /* Firefox */
    -webkit-animation: downIMG 0.5s;
    /* Safari e Chrome */
    -o-animation: downIMG 0.5s;
    /* Opera */
}

.position-50x50-text {
    text-align: justify;
    display: inline-block;
    vertical-align: top;
    padding: 10px;
}

.position-50x50-img {
    text-align: center;
    display: inline-block;
    padding: 10px;
}

.games-lobby {
    margin-top: 30px;
    margin-bottom: 30px;
    text-align: center;
    background-color: #800000;
    width: 100%;
    padding-top: 10px;
    padding-bottom: 10px;
}

.games-list {
    text-align: center;
    width: 100%;
}

.game-img {
    width: 300px;
    height: 150px;
}

.gameTitle {
    position: absolute;
    margin-top: 120px;
    margin-left: 10px;
    text-transform: uppercase;
    opacity: 0;
    pointer-events: none;
}

.game-img:hover {
    -moz-animation: upperIMG 1s;
    /* Firefox */
    -webkit-animation: upperIMG 1s;
    /* Safari e Chrome */
    -o-animation: upperIMG 1s;
    /* Opera */
    transform: scale(1.1);
}

.gameCard {
    display: inline-block;
    margin: 10px;
}

.gameCard:hover>.gameTitle {
    -moz-animation: fadeIn 1s;
    /* Firefox */
    -webkit-animation: fadeIn 1s;
    /* Safari e Chrome */
    opacity: 100;
    z-index: 1;
    background: rgba(0, 0, 0, 0.3)
}

.game-img:not(:hover) {
    -moz-animation: downIMG 0.5s;
    /* Firefox */
    -webkit-animation: downIMG 0.5s;
    /* Safari e Chrome */
    -o-animation: downIMG 0.5s;
    /* Opera */
}

.description {
    text-align: center;
}

.brandpos {
    float: left;
    margin-left: 30px;
}

.clear {
    clear: both;
}

.clearButton {
    background: 0%;
    color: white;
    font-size: 32px;
    border-radius: 50px;
    border-color: white;
    border-style: solid;
    border-width: 3px;
    text-transform: uppercase;
    cursor: pointer;
}

.clearButton:hover {
    background: 20%;
    background-color: #8b1a1a;
    color: white;
    font-size: 32px;
    border-radius: 50px;
    border-color: white;
    border-width: 3px;
    text-transform: uppercase;
}

@keyframes fadein {
    from {
        opacity: 0;
    }
    to {
        opacity: 100;
    }
}

@-webkit-keyframes fadein
/* Safari e Chrome */

{
    from {
        opacity: 0;
    }
    to {
        opacity: 100;
    }
}

@-moz-keyframes fadein
/* Firefox */

{
    from {
        opacity: 0;
    }
    to {
        opacity: 100;
    }
}

@keyframes slidein {
    from {
        width: 450px;
    }
    to {
        width: 500px;
    }
}

@-webkit-keyframes slidein
/* Safari e Chrome */

{
    from {
        width: 450px;
    }
    to {
        width: 500px;
    }
}

@-moz-keyframes slidein
/* Firefox */

{
    from {
        width: 450px;
    }
    to {
        width: 500px;
    }
}

@keyframes slideout {
    from {
        width: 500px;
    }
    to {
        width: 450px;
    }
}

@-webkit-keyframes slideout
/* Safari e Chrome */

{
    from {
        width: 500px;
    }
    to {
        width: 450px;
    }
}

@-moz-keyframes slideout
/* Firefox */

{
    from {
        width: 500px;
    }
    to {
        width: 450px;
    }
}

@keyframes upperIMG {
    from {
        transform: scale(1);
    }
    to {
        transform: scale(1.1);
    }
}

@-webkit-keyframes upperIMG
/* Safari e Chrome */

{
    from {
        transform: scale(1);
    }
    to {
        transform: scale(1.1);
    }
}

@-moz-keyframes upperIMG
/* Firefox */

{
    from {
        transform: scale(1);
    }
    to {
        transform: scale(1.1);
    }
}

@-webkit-keyframes downIMG
/* Safari e Chrome */

{
    from {
        transform: scale(1.1);
    }
    to {
        transform: scale(1);
    }
}

@-moz-keyframes downIMG
/* Firefox */

{
    from {
        transform: scale(1.1);
    }
    to {
        transform: scale(1);
    }
}