ul,li{
  margin: 0;
  padding: 0;
}

.item1 {
  background-image: url("../assets/images/bg.jpg");
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size:auto;
  height: 800px;
}

.item3{
  background-image: url("../assets/images/bg2.png");
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: auto;
  height: 800px;
}

.item2{
  background-image: none;
  background-color: grey;
  height: 400px;
}

.content{
   background-color: rgba(0, 0, 0, 0.4);
   text-align: center;
   width: 50%;
   margin: auto;
   position: relative;
   top: 50%;
   color: white;
}

nav{
  height: 50px;
  margin: auto;
}

nav ul{
  display: flex;
}

nav li{
  margin: auto;
  padding: 10px;
  list-style-type: none;
  cursor: pointer;
}

li:hover,button:hover{
  color: blue;
}

button{
  display: inline-block;
  margin: auto;
  cursor: pointer;
  border: none;
  background: none;
}