.gst-form {
    max-width: 700px;
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
    background: #f9f9f9;
}

.gst-form h2 {
    margin-bottom: 20px;
}

.gst-form label {
    font-weight: bold;
}

.gst-form input, .gst-form select {
    width: 100%;
    padding: 8px;
    margin-bottom: 15px;
}

.gst-form button {
    padding: 10px 20px;
    background: #0073aa;
    color: #fff;
    border: none;
    border-radius: 5px;
}

.invoice-box {
    border: 1px solid #ddd;
    padding: 20px;
    margin-bottom: 30px;
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.invoice-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

.invoice-table th, .invoice-table td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: center;
}

.invoice-table th {
    background: #f1f1f1;
}

.download-pdf {
    padding: 8px 15px;
    margin-top: 10px;
    background: #0073aa;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}