.gst-calculator-container {
    max-width: 400px;
    margin: auto;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.gst-calculator-container h3 {
    text-align: center;
    color: #007bff;
}

.gst-calculator-container label {
    font-weight: bold;
    display: block;
    margin: 10px 0 5px;
}

.gst-calculator-container input,
.gst-calculator-container select {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.gst-calculator-container button {
    width: 100%;
    padding: 10px;
    background: #28a745;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

.gst-calculator-container button:hover {
    background: #218838;
}

#gst_result {
    margin-top: 20px;
    padding: 10px;
    background: #e9ecef;
    border-radius: 5px;
    text-align: center;
    font-size: 16px;
}

.error {
    color: red;
}