.rwmb-form .rwmb-math_operator-wrapper{
    width: 100%;
    margin-bottom: 20px;
}

.rwmb-form .rwmb-math_operator-wrapper input[type="text"]{
    width: 100%;
    height: 40px;
    padding: 0 10px;
    border: 0;
    border-radius: 3px;
    font-size: 14px;
    color: var(--bs-primary);
    background-color: var(--bs-gray-400);
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    outline: none;
    transition:all 0.3s ease;
    caret-shape: block;
    /*appearence*/
    -moz-appearance: none;
}

.rwmb-form .rwmb-math_operator-wrapper input[type="text"]:focus,
.rwmb-form .rwmb-math_operator-wrapper input[type="text"]:hover{
    background: var(--bs-gray-200);
    color: var(--bs-secondary);
}

/*add fontawesome number */
.rwmb-form .rwmb-math_operator-wrapper .rwmb-input{
    position:relative;
}

.rwmb-form .rwmb-math_operator-wrapper .rwmb-input::before{
    content: "\f1ec";
    font-family: "FontAwesome";
    position: absolute;
    right: 10px;
    top: 10px;
    color: var(--bs-primary);
    font-size:.9em;
    transition:all 0.3s ease;
}