.main_input {
    width: 399px;
    height: 50px!important;
}
.wrapper {
    text-align: center;
}

.math-field {
    padding:10px 0px 10px 0px;
    width:100%;
    box-shadow:#8bd 0 0 1px 2px, inset #6ae 0 0 2px 0;
    border-radius:1px;
}

#latex {
    padding: 20px;
    border: 1px solid #000;
    width: 200px;
}

.latex {
    margin-top: 30px;
}

.latex_row {
    margin: 10px 0 30px;
}

.sqrt-prefix {
    padding-top: 0;
    position: relative;
    top: .1em;
    vertical-align: top;
    -webkit-transform-origin: top;
    -moz-transform-origin: top;
    -ms-transform-origin: top;
    -o-transform-origin: top;
    transform-origin: top;
}
.fraction {
    font-size: 90%;
    text-align: center;
    vertical-align: -.5em;
    padding: 0 .1em;
}
.denominator {
    border-top: 1px solid;
    float: right;
    width: 100%;
}
.btn-append{background-color:#dad4d4;width:70px;height:70px;margin-bottom: 2px;}