.okvir {
    height: 88vh;
    background-color: whitesmoke;
    overflow-x: hidden;
}

section {
    position: relative;
    top: 4vh;
    margin-left: 20%;
}

section div {
    position: relative;
    margin-bottom: 2vh;
    padding: 1.5vw;
    bottom: 1vh;
    width: 40vw;
    height: auto;
    background: #C4C4C4;
    text-align: left;
    font-family: sans-serif;
    overflow-y: none;
}

section span {
    position: relative;
    margin: 0;
    padding: 0;
    width: 40vw;
    height: 5vh;
    background: #C4C4C4;
    text-align: center;
    font-family: sans-serif;
    top: 1vh;
    overflow: none;
}

section input {
    position: relative;
    margin: 0;
    padding: 0;
    width: 37vw;
    height: 6vh;
    background: #C4C4C4;
    font-size: 4vh;
    text-align: right;
    font-family: sans-serif;
    color: blue;
    overflow: none;
}

span{
     font-size: 3vh;
     color: orange;
}

.rezultat {
    top: 0;
}

b {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: auto;
    top: 1vh;
    bottom: 1vh;
    color: red;
}

pre {
    margin-bottom: 2vh;
    padding: 1.5vw;
    width: 60vw;
    height: auto;
    background: #CCCCCC;
    font-size: 1.5vh;
    text-align: left;
    border: 0.2vw #000 solid;
}

h2 {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: auto;
    margin-left: 2vw;
    font-family: sans-serif;
    font-size: 3vh;
    color: red;
}