*{
   padding:0px;
   margin:0px;
}

img {
    max-width:100%;}

body {margin:0;}

.topnav {
  overflow: hidden;
  background-color: #000;
}

.topnav a {
  float: left;
  display: block;
  color: #fff;
  text-align: left;
  padding: 14px 16px;
  text-decoration: none;
font-family: verdana;
  font-size: 20px;
}

.topnav a:hover {
  background-color: cadetblue;
  color: white;
}

.active {
  background-color: cadetblue;
  color: white;
}

.topnav .icon {
  display: none;
}

@media screen and (max-width: 3000px) {
  .topnav a:not(:first-child) {display: none;}
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 3000px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }

}

.container {
    position:relative ;
    width: 100%;
}

.image {
  opacity: 1;
  display: block;
  width: 100%;
  height: auto;
  transition: .5s ease;
  backface-visibility: hidden;
}

.middle {
  transition: .5s ease;
  opacity: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  text-align: center;
}

.container:hover .image {
  opacity:0.3 ;
}

.container:hover .middle {
  opacity: 1;
}

.text {
  background-color: cadetblue;
  color: white;
font-family: verdana;
  font-size: 16px;
  padding: 16px 32px;
}