TinyMCE example CSS TEMPLATE

    .cust_popup {
        width: 100%;
        z-index: 10010;
    }

    .cust_popup_content {
        display: block;
        width: 350px;
        box-shadow: 0 1px 3px 0 #C8C8D2;
        margin-left: auto;
        margin-right: auto;
        text-align: left;
        @property "primaryContent.background";
        background-color: @contentBackground;
        @property "/primaryContent.background";
    }

    .cust_heading {
        border-radius: 0 0 0 0;
    }

    .cust_popup input {
        font-size: 15px;
        padding: 5px;
    }