.gst-calculator-wrap{
    max-width:480px;
    border:1px solid #e6e6e6;
    padding:18px;
    border-radius:8px;
    background:#fff;
    box-shadow:0 2px 8px rgba(0,0,0,0.03);
    font-family: Arial, Helvetica, sans-serif;
}

.gst-form label{
    display:block;
    margin-bottom:10px;
    font-size:14px;
    color:#333;
}

.gst-form input[type='number'],
.gst-form select{
    width:100%;
    padding:8px 10px;
    margin-top:6px;
    border:1px solid #ddd;
    border-radius:6px;
    box-sizing:border-box;
}

.gst-btn{
    display:inline-block;
    margin-top:10px;
    padding:10px 14px;
    background:#0073aa;
    color:#fff;
    border:none;
    border-radius:6px;
    cursor:pointer;
    font-size:14px;
}

.gst-btn:disabled{
    opacity:0.6;
    cursor:not-allowed;
}

.gst-result{
    margin-top:14px;
    background:#f9f9f9;
    padding:12px;
    border-radius:6px;
    border:1px solid #f0f0f0;
}

.gst-result p{
    margin:6px 0;
    font-size:14px;
}