#gst-calculator h3{text-align:center;color:#333;font-size:24px;margin-bottom:20px;}#gst-calculator label{font-weight:bold;display:block;margin-bottom:5px;color:#555;}#gst-calculator select,#gst-calculator input{width:100%;padding:10px;border-radius:5px;border:1px solid #ccc;font-size:16px;margin-bottom:15px;}#gst-calculator input[readonly]{background-color:#e9ecef;}#gst-calculator .flex-row{display:flex;justify-content:space-between;}#gst-calculator .flex-row label{width:40%;}#gst-calculator .flex-row input{width:55%;}#gst-calculator button{width:100%;padding:10px;background-color:#007bff;color:white;border:none;border-radius:5px;font-size:16px;cursor:pointer;}