html {
  background: url(https://altt.me:443/tg.php?https://t.me/img/bg_full.jpg) no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}
body {
  background: none;
}
.main_cover {
  padding: 250px 0;
}
.main_container {
  border-radius: 20px;
  overflow: hidden;
  background-color: rgba(0, 0, 0, 0.8);
  color: #FFF;
  text-shadow: 0 1px 1px #000;
  max-width: 530px;
  width: 84%;
  padding: 10px 10px 60px;
  margin: 0 auto;
}
.main_logo {
  background: url(https://altt.me:443/tg.php?https://t.me/img/main_logo.png) no-repeat 0 0;
  width: 270px;
  /*height: 320px;*/
  height: 300px;
  margin: 20px auto 0;
}
.main_description {
  font-size: 170%;
  line-height: 170%;
  max-width: 410px;
  margin: 0 auto 50px;
}
.main_download_btn {
  color: #FFF;
  display: inline-block;
  font-size: 180%;
  font-weight: bold;
  line-height: 76px;
  height: 76px;
  padding: 0 30px;
  background: #bdff90;
  overflow: hidden;
  border-radius: 38px;
  box-shadow: 0 2px 0px rgba(0,0,0, 0.5);
  text-shadow: 0 -2px 1px rgba(0,0,0,0.3);

  background: -moz-linear-gradient(top,  #bdff90 0%, #98ff6b 1%, #86e958 3%, #82e753 4%, #78dd4a 19%, #6ed242 30%, #41a21c 70%, #2f8f0c 92%, #2d8d0a 96%, #328f0f 97%, #3b941a 99%, #499b2b 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#bdff90), color-stop(1%,#98ff6b), color-stop(3%,#86e958), color-stop(4%,#82e753), color-stop(19%,#78dd4a), color-stop(30%,#6ed242), color-stop(70%,#41a21c), color-stop(92%,#2f8f0c), color-stop(96%,#2d8d0a), color-stop(97%,#328f0f), color-stop(99%,#3b941a), color-stop(100%,#499b2b));
  background: -webkit-linear-gradient(top,  #bdff90 0%,#98ff6b 1%,#86e958 3%,#82e753 4%,#78dd4a 19%,#6ed242 30%,#41a21c 70%,#2f8f0c 92%,#2d8d0a 96%,#328f0f 97%,#3b941a 99%,#499b2b 100%);
  background: -o-linear-gradient(top,  #bdff90 0%,#98ff6b 1%,#86e958 3%,#82e753 4%,#78dd4a 19%,#6ed242 30%,#41a21c 70%,#2f8f0c 92%,#2d8d0a 96%,#328f0f 97%,#3b941a 99%,#499b2b 100%);
  background: -ms-linear-gradient(top,  #bdff90 0%,#98ff6b 1%,#86e958 3%,#82e753 4%,#78dd4a 19%,#6ed242 30%,#41a21c 70%,#2f8f0c 92%,#2d8d0a 96%,#328f0f 97%,#3b941a 99%,#499b2b 100%);
  background: linear-gradient(to bottom,  #bdff90 0%,#98ff6b 1%,#86e958 3%,#82e753 4%,#78dd4a 19%,#6ed242 30%,#41a21c 70%,#2f8f0c 92%,#2d8d0a 96%,#328f0f 97%,#3b941a 99%,#499b2b 100%);
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#bdff90', endColorstr='#499b2b',GradientType=0 );
}
.main_download_btn:hover {
  color: #FFF;
  text-decoration: none;
}

@media (max-width: 480px) {
  html {
    background-image: url(https://altt.me:443/tg.php?https://t.me/img/bg_narrow.jpg);
  }
  .main_cover {
    padding: 60px 0;
  }
  .main_container {
    padding-bottom: 40px;
  }
  .main_logo {
    width: 135px;
    height: 150px;
    background-size: 135px 160px;
    margin: 20px auto 0;
  }
  .main_description {
    font-size: 140%;
    margin-bottom: 30px;
  }
  .main_download_btn {
    font-size: 140%;
    line-height: 50px;
    height: 50px;
    padding: 0 15px;
    white-space: nowrap;
    text-overflow: ellipsis;
  }
}