.gst-calculator {
    max-width: 400px;
    background: #f9f9f9;
    padding: 20px;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-family: Arial, sans-serif;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    margin: 20px auto;
}

.gst-calculator h2 {
    text-align: center;
    color: #333;
    margin-bottom: 15px;
}

.gst-calculator label {
    display: block;
    margin-top: 10px;
    font-weight: bold;
}

.gst-calculator input,
.gst-calculator select {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    border-radius: 5px;
    border: 1px solid #ccc;
}

#gst_rate {
    background-color: #fff;
}

#calculate_gst {
    background-color: #0073aa;
    color: white;
    border: none;
    padding: 10px;
    width: 100%;
    border-radius: 5px;
    margin-top: 15px;
    cursor: pointer;
    font-size: 16px;
}

#calculate_gst:hover {
    background-color: #005c90;
}

.gst-result {
    margin-top: 20px;
    background: #e9ffe9;
    padding: 15px;
    border-radius: 5px;
    border: 1px solid #b2d8b2;
}

.gst-result p {
    margin: 8px 0;
    font-size: 15px;
}