body {
  background-image:  url("../media/javascript.jpg");
  background-repeat: no-repeat;
  background-size: cover;   
  background-attachment: fixed;
  font-family: 'Michroma', sans-serif;
}

.button{
  position: right;
  color: rgb(255, 255, 255);
  text-shadow:  2px 2px 5px rgb(0, 0, 0); 
}

.button-overlay{
  color: rgb(255, 255, 255);
}

.overlay {
  height: 0%;
  width: 100%;
  position: fixed;
  z-index: 1;
  top: 0;
  left: 0;
  background-color: rgba(255, 255, 255, 0.5);
  background-image: radial-gradient(rgb(255, 255, 255), rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0));
  overflow-y: hidden;
  transition: 0.5s;
}

.overlay-content {
  position: relative;
  top: 25%;
  width: 100%;
  text-align: center;
  margin-top: 30px;
}

.overlay a {
  padding: 8px;
  text-decoration: none;
  font-size: 36px;
  color: #ff0000;
  display: block;
  transition: 0.3s;
}

.overlay a:hover, .overlay a:focus {
  font-size: 50px;
}

.overlay .closebtn {
  position: absolute;
  top: 20px;
  right: 45px;
  font-size: 60px;
}

@media screen and (max-height: 450px) {
  .overlay {overflow-y: auto;}
  .overlay a {font-size: 20px}
  .overlay .closebtn {
  font-size: 40px;
  top: 15px;
  right: 35px;
  }
}



.column {
  float: left;
  width: 45%;
  padding: 10px;
  
}


.row:after {
  content: "";
  display: table;
  clear: both;
}


@media screen and (max-width:600px) {
  .column {
    width: 100%;
  }
}

.collapsible {
  background-color: rgb(184, 184, 184);
  color: rgb(0, 0, 0);
  cursor: pointer;
  padding: 10px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
}

.active .collapsible:hover {
  background-color: rgb(71, 71, 71);
}

.content {
  padding: 0 18px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
  background-color: #4e4e4e;
}