input,
select{
    max-width: 100%;
    font-size: 16px;
    padding: 5px;
    border: none;
    outline: 3px solid #ccc;
    -webkit-transition: outline 300ms ease-out;
    -moz-transition: outline 300ms ease-out;
    -o-transition: outline 300ms ease-out;
    transition: outline 300ms ease-out;
    box-sizing: border-box;
}
input{
    display: inline-block;
    text-align: center;
}
h2{
    font-size: 15px;
    margin: 20px 0 5px;
}
h3{
    margin-bottom: 7px;
    font-size: 16px;
}
label{
    margin-top: 5px;
    font-size: 13px;
    display: inline-block;
}
.small{
    font-size: 12px;
}
input:focus{
    outline: 3px solid #24a777;
}
.formula{
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 30px 0;
    position: relative;
}
.formula::after,
.klasma::after{
    content: " ";
    display: block;
    position: absolute;
    background-color: #ccc;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.formula::after{
    height: 20px;
    width: 20px;
    clip-path:polygon(0% 20%, 100% 20%, 100% 40%, 0% 40%, 0% 60%, 100% 60%, 100% 80%, 0% 80%);
}
.formula > div{
    width: 50%;
}
.formula > div:first-child{
    padding-right: 15px;
}
.formula > div:last-child{
    padding-left: 15px;
}
.klasma{
    position: relative;
}
.klasma::after{
    height: 3px;
    width: 70%;
}
.klasma > div:last-child{
    margin-top: 20px;
}
.klasma sup{
    margin-left: 5px;
}
.klasma label{
    white-space: nowrap;
}
.cat > ul{
    list-style: none;
}
.cat li{
    display: none;
}
.calc[data-cat="a"] .cat li:nth-child(1),
.calc[data-cat="b"] .cat li:nth-child(2),
.calc[data-cat="c"] .cat li:nth-child(3),
.calc[data-cat="d"] .cat li:nth-child(4),
.calc[data-cat="e"] .cat li:nth-child(5){
    display: block;
}

@media (max-width: 580px){

}