JSFiddle - React, Tailwind, and code Playground

HTML

<input type='button' class='btn btn-default btn-success btn-lg' value='test'/>

CSS

button, html input[type="button"], input[type="reset"], input[type="submit"] {
    -webkit-appearance: button;
    cursor: pointer;
}
.btn {
    display: inline-block;
    padding: 6px 12px;
    margin-bottom: 0;
    font-size: 14px;
    font-weight: normal;
    line-height: 1.42857143;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-image: none;
    border: 1px solid transparent;
    border-radius: 4px;
}
.btn-default {
    color: #333;
    background-color: #fff;
    border-color: #ccc;
}
.btn-success {
    color: #fff;
    background-color: #5cb85c;
    border-color: #4cae4c;
}
.btn:hover
{
    background-image:none !important;
    background-color:#ff00ff !important;
}
.btn-danger {
    color: #fff;
    background-color: #d9534f;
    border-color: #d43f3a;
}
.btn-lg, .btn-group-lg > .btn {
    padding: 13px 16px;
    font-family: futura_maxi_cg_demiregular,tahoma, arial, sans-serif;
    font-size: 16px;
    font-weight: bold;
    line-height: 18px;
    border-radius: 6px;
}
.btn-default, .btn-primary, .btn-success, .btn-info, .btn-warning, .btn-danger {
    text-shadow: 0 -1px 0 rgba(0, 0, 0, .2);
    -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 1px rgba(0, 0, 0, .075);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 1px rgba(0, 0, 0, .075);
}
.btn-default {
    /* text-shadow: 0 1px 0 #fff; */
    background-image: -webkit-linear-gradient(top, #fff 0%, #e0e0e0 100%);
    background-image: -o-linear-gradient(top, #fff 0%, #e0e0e0 100%);
    background-image: -webkit-gradient(linear, left top, left bottom, from(#fff), to(#e0e0e0));
    background-image: linear-gradient(to bottom, #fff 0%, #e0e0e0 100%);
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffffff', endColorstr='#ffe0e0e0', GradientType=0);
    filter:...