body {
    background-image: url(../img/pozadina.jpg);
    background-attachment: fixed !important;
    background-size: cover;
    margin: 0;
}

* {
    box-sizing: border-box;
}

.box {
    background-color: white;
    width: 300px;
    height: 150px;
    padding: 20px;
    border: solid 10px red;
    border-right: dashed 10px green;
    border-bottom-style: double;
    margin: 20px;
    overflow: scroll;
    background-image: url(../img/box_pozadina.png);
}

.box-pozadina {
    background-color: rgba(255, 255, 255, 0.5);
    width: 1000px;
    height: 1500px;
    margin: auto;
    margin-top: 20px;
    border: red 2px dashed;

}

.brown {
    background-color: brown;
    width: 300px;
    height: 100px;
    display: inline-block;
    margin: 10px;
    margin-bottom: 20px;
}