.calc_res {
    display: none;
}
.calc_res.active {
    display: block;
}
.calculate_container {
    float: left;
    width: 100%;
    margin: 35px 0 0 0;
    display: flex;
    justify-content: center;
}
.calculate_container .btn {
    float: left;
    cursor: pointer;
    padding: 5px;
    border: 1px solid #8467a9;
    border-radius: 4px;
    background: #cdb6e3;
    background: -moz-linear-gradient(top, #cdb6e3 0%, #a78fbd 7%, #735aa7 100%);
    background: -webkit-linear-gradient(top, #cdb6e3 0%,#a78fbd 7%,#735aa7 100%);
    background: linear-gradient(to bottom, #cdb6e3 0%,#a78fbd 7%,#735aa7 100%);
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#cdb6e3', endColorstr='#735aa7',GradientType=0 );
    color: #FFFFFF;
}
.btn_disabled {
    float: left;
    cursor: default;
    padding: 5px;
    border: 1px solid #A7A9AC;
    border-radius: 4px;
    background: linear-gradient(180deg, rgba(237,235,233,.5) 0%, rgba(246,245,244,.5) 14.36%, rgba(167,169,172,.5) 95.58%), rgba(255,255,255,1);
    color: #A7A9AC;
}
.hidden {
    display: none;
}