.calculation {
    padding: 20px 40px;
    background: #f7f7f7;
    border: 5px solid #004498;
    border-radius: 5px;
    margin-top: 15px;
}

.calculation .title {
    text-align: center;
    font-size: 21px;
    padding: 10px 0 0;
    font-weight: 500;
    margin: 0;
}

.calculation p {
    text-align: left;
    font-size: 15px;
    padding: 10px 0 0px;
    font-weight: 300;
}

.calculation .text {
    border: none !important;
    border-bottom-width: medium;
    border-bottom-style: none;
    border-bottom-color: currentcolor;
    border-bottom-width: medium;
    border-bottom-style: none;
    border-bottom-color: currentcolor;
    outline: 0 !important;
    background: 0 0 !important;
    padding: 10px 0px !important;
    border-bottom: 2px solid #004498 !important;
    color: #000 !important;
    height: auto !important;
    display: inline-block !important;
    width: 44% !important;
    margin: 5px 10px 5px 0;
}

.calculation input[type=radio].css-checkbox {
    position:absolute; 
    z-index:-1000; 
    left:-1000px; 
    overflow: hidden; 
    clip: rect(0 0 0 0); 
    height:1px; 
    width:1px; 
    margin:-1px; 
    padding:0; 
    border:0;
}

.calculation input[type=radio].css-checkbox + label.css-label {
    padding-left:35px;
    height:25px; 
    display:inline-block;
    line-height:25px;
    background-repeat:no-repeat;
    background-position: 0 0;
    font-size:15px;
    vertical-align:middle;
    cursor:pointer;
    width: 100%;
    font-weight: 300;
}

.calculation input[type=radio].css-checkbox:checked + label.css-label {
    background-position: 0 -25px;
}

.calculation label.css-label {
    background-image:url(http://csscheckbox.com/checkboxes/u/csscheckbox_80a3e90935ad4f84b08e34dbdf1db280.png);
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-size: 25px;
}

.calculation .send {
    background: linear-gradient(to top,#004498,#116fe4);
        background-color: rgba(0, 0, 0, 0);
    background-color: rgba(0, 0, 0, 0);
    color: #fff;
    margin: 20px 0 0px;
    cursor: pointer;
    transition: .3s;
    border-radius: 4px;
    display: block;
    border: none;
    outline: 0;
    padding: 15px 30px;
    width: 100%;
    font-size: 16px;
    text-shadow: unset;
    font-weight: 600;
}
@media screen and (max-width:768px){
    
    .calculation .text {
        display: block !important;
        width: 90% !important;
        margin: 5px 10px 5px 0;
    }
    .calculation label {
        display: block !important;
        width: 90% !important;
    }
}