html, body{
    background-color: lightgray;
}
.cim{
    text-align: center;
    margin-top: 15px;
}
nav ul{
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: lightsteelblue;
}
nav li{
  float: left;
}
nav a{
  display: block;
  color: black;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}
nav a:hover{
  background-color: gray;
}
.selected{
    background-color: lightgreen;
}
.projekt{
    border: 1px solid;
    width: 20%;
    background-color: lightblue;
    border-radius: 10px;
}
.projekt-cim{
    text-align: center;
}
.projekt-gomb{
    display: block;
    margin-left: auto;
    margin-right: auto;
    background-color: lightgreen;
    text-decoration: none;
    text-align: center;
    border: 1px solid;
    width: 30%;
    border-radius: 10px;
}