body {
 
  background-size: cover;
}

h1 {
  text-align: center;
  font-family: Tahoma, Arial, sans-serif;
  color: #06D85F;
  margin: 100px 0;
}

.box {
  
 
  background: rgba(255,255,255,0.2);
  

 
  background-clip: padding-box;
  width:240px;float:left;margin:15px 15px 10px 7px
}

.button {
  font-size: 1em;
  padding: 10px;
  color: #fff;


  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease-out;
}
.button:hover {
  background: #ddd;
}

.overlay {
  position: absolute;
  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;
}

.popup {
  margin: 70px auto;
  padding: 10px;
  background: #fff;
  border-radius: 5px;
  width: 700px;
  height:600px;
  position: relative; z-index:340;
  transition: all 5s ease-in-out;
}

.popup h2 {
  margin-top: 0;
  color: #333;
  font-family: Tahoma, Arial, sans-serif;
}
.popup .close {
  position: absolute;
  z-index:350;
  top: 2px;
  right: 2px;
  transition: all 200ms;
  font-size: 40px;
  font-weight: bold;
  text-decoration: none;
  color: #333;
}
.popup .close:hover {
  color: #06D85F;
}
.popup .content {
  max-height: 600px;
  overflow: hidden;
}

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