body {
    animation: back 150s linear infinite;
    transition: .3s linear;
    font-family: 'Didact Gothic', sans-serif;
    background: linear-gradient(-45deg, #e05252 0%, #99e052 25%, #52e0e0 50%, #9952e0 75%, #e05252 100%);
    background-size: 400% 400%;
    animation: gradient 10s ease infinite;
    margin: 0 auto;
    font-size: 2em;
    text-align: center;
    /*Защита от выделения и копироавния текста*/
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    -o-user-select: none;
    user-select: none;
}

@keyframes gradient {
    0% {
        background-position: 0 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0 50%;
    }
}

.con {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

table {
    width: 30%;
}

a {
    opacity: 0;
    position: absolute;
    width: 25%;
    top: 61%;
    left: 37%;
    text-decoration: none;
    color: rgb(0, 0, 0);
    padding: 5px 10px;
    background: none;
    border-radius: 15px;
    border: 2px solid rgb(0, 255, 13);
    box-shadow: 0 0 15px rgb(0, 255, 13);
    transition: .3s linear;
    cursor: default;
    font-size: 0.7em;
}

a:hover {
    border: 2px solid rgb(0, 140, 255);
    box-shadow: 0 0 15px rgb(0, 238, 255);
}

@media(max-width:1080px) {
    body {
        font-size: 3em;
    }
    table {
        width: 60%;
    }
}

.overlay {
    position: absolute;
    width: 100%;
    height: 100vh;
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, .8);
    display: none;
    font-size: 24px;
}

.popup {
    position: absolute;
    width: 600px;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    padding: 40px;
    box-sizing: border-box;
    background-color: #d43030;
    border-radius: 5%;
    color: #fff;
    font-size: 24px;
}

.close-popup {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 23px;
    height: 23px;
    cursor: pointer;
}

.close-popup:before {
    content: '';
    background-color: #fff;
    position: absolute;
    height: 1px;
    width: 31px;
    top: 11px;
    left: -4px;
    transform: rotate(-45deg);
}

.close-popup:after {
    content: '';
    background-color: #fff;
    position: absolute;
    height: 1px;
    width: 31px;
    top: 11px;
    transform: rotate(45deg);
    left: -4px;
}

@media screen and (max-width: 768px) {
    .popup {
        width: 100%;
        height: 100vh;
        font-size: 15px;
    }
}

form {
    display: inline-block;
}

button {
    margin-top: 10px;
    width: 70px;
    height: 70px;
    font-size: 54px;
    border: none;
    border-radius: 50%;
    transition: .3s linear;
}

button:hover {
    box-shadow: 0 0 15px rgb(255, 0, 0);
}

.left {
    margin-left: 15px;
}

.fa {
    position: relative;
    padding-left: 10px;
    color: red;
}

.fa-youtube-play {
    padding: 0;
}

#block {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 4;
}