body {
  font-family:'Roboto', sans-serif;
  background: url() no-repeat;
  background-size: cover;
  height: 100vh;
}

.myGalaxyAudio{
   font-size: 1em;
  padding: 10px;
  color: #fff;
  border: 3px solid #ffffff;
  border-radius: 5px/50px;
  text-decoration: none;
  cursor: pointer;
}

.box {

  text-align: center;
}

.button {
   background: #cbcbcb;
   overflow: hidden;
   margin: 20px;
   padding: 12px 12px;
   border: 90 none;
   border-radius: 4px;
   line-height: 1.3;
 

}
.button:hover {
  background: #a6a6a6;
}

.overlay {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  transition: opacity 500ms;
  visibility: hidden;
  opacity: 0;
}
.overlay:target {
  visibility: visible;
  opacity: 1;
}

.openPopup {
  visibility: visible;
  opacity: 1;
}

.popup {
  margin: 70px auto;
  padding: 20px;
  background: #E8E8E8;
  border-radius: 5px;
  width: 30%;
  position: relative;
  transition: all 5s ease-in-out;
}

.popup h2 {
  margin-top: 0;
  color: #B2B2D3;
  font-family: Tahoma, Arial, sans-serif;
  text-align: center;
}
.popup .close {
  position: absolute;
  top: 20px;
  right: 30px;
  transition: all 200ms;
  font-size: 30px;
  font-weight: bold;
  text-decoration: none;
  color: #333;
}
.popup .close:hover {
  color: #cf5da3;
}
.popup .content {
  max-height: 30%;
  overflow: auto;
}

@media screen and (max-width: 700px){
  .box{
    width: 70%;
  }
  .popup{
    width: 70%;
  }
}