body {
    font-family: Arial, sans-serif;
    width: 80%;
    margin: 40px auto;
    background-color: orangered;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
}

.kartice {
    margin-top: 40px;
}
.kartica{
    float: left;
    width: 300px;        
    margin-right: 10px;  
    padding: 20px;
    background-color: black;
    color: white;
    text-align: center;
    box-sizing: border-box;
}

.kartica:last-child {
    margin-right: 0;
}
.clear-blok {
    clear: both;
    margin-top: 40px;
    padding: 20px;
    background-color: #ddd;
    text-align: center;
}
img{
    width: 100px;
    height: 100px;
}
.tekst-sa-slikom img {
    float: left;
    margin: 0 20px 20px 0;
    width: 200px;
    height: auto;
}
.tekst-sa-slikom {
    margin-bottom: 40px;
}
.clearfix::after {
    content: "";
    display: block;
    clear: both;
}