.mezera{
    color: white;
}
.obdelnik1{
    background-color: bisque;
    width: 15%;
    padding: 5%;
    float: left;
}

.obdelnik2{
    background-color: rgb(19, 199, 190);
    width: 15%;
    padding: 5%;
    float: left;
}

.obdelnik3{
    background-color: rgb(17, 172, 43);
    width: 15%;
    padding: 5%;
    float: left;
}

.obdelnik4{
    background-color: rgb(160, 20, 216);
    width: 15%;
    padding: 5%;
    float: left;
}
@media screen and (max-width: 900px){
  .obdelnik1{
    width: 100%;
    padding: 5%;
  }
  .obdelnik2{
    width: 100%;
    padding: 5%;
  }
  .obdelnik3{
    width: 100%;
    padding: 5%;
  }
  .obdelnik4{
    width: 100%;
    padding: 5%;
  }
}