*{
    box-sizing: border-box;
}
body{
    background-color: grey;
    margin: 0 auto;
    text-align: center;
}
.glavni{
    width: 1200px;
    height: 50px;
    margin: 0 auto;
    _outline: dotted blue;
    margin-top: 50px;
}
.desktop{
    width: 300px ;
    height: 550px;
    _outline: dotted red;
    float: left;
    background-color: antiquewhite;
    border-radius: 10px;
    margin: 10px;
    position: relative;
}
.laptop{
    width: 440px ;
    height: 550px;
    _outline: dotted green;
    float: left;
    background-color: antiquewhite;
    border-radius: 10px;
    margin: 10px;
    position: relative;
}
.tablet{
    width: 350px ;
    height: 550px;
    _outline: dotted purple;
    float: left;
    background-color: antiquewhite;
    border-radius: 10px;
    margin: 10px;
    position: relative;
}
.cijena{
    width: 150px;
    height: 50px;
    background-color: rgb(234, 159, 29);
    margin: 0 auto;
    border-radius: 5px;
    text-align: center;
}
#gumb{
    width: 150px;
    height: 50px;
    background-color: rgb(171, 17, 17);
    margin: 0 auto;
    color: white;
    border-radius: 5px;
    text-align: center;
    font-size: 16px;
}
#naslov{
    color: white;
    font-size: 50px;
}
.proizvod{
    width: 300px;
    height: 300px;
    margin-top: 30px;
}
.proizvod2{
    width: 400px;
    height: 300px;
    margin-top: 30px;
}
.proizvod3{
    width: 250px;
    height: 300px;
    margin-top: 30px;
}
.popust{
    width: 110px;
    position:absolute;
    top:-20px;
}
.popust2{
    width: 110px;
    position:absolute;
    top:-20px;
    right: -20px;
}
.popust3{
    width: 110px;
    position:absolute;
    top:-20px;
    right: -20px;
}
.cijena h1{
    padding-top: 5px;
}
#gumb:active{
    color: white;
    position: relative;
    top: 3px;
    left: 3px;
}