.container {
    max-width: 700px;
    margin: 50px auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 18px;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-size: 20px;
}

input {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
    font-size: 18px;
}

.button-group {
    margin-top: 20px;
}

button {
    padding: 12px 24px;
    margin-right: 10px;
    cursor: pointer;
    font-size: 18px;
}

#message {
    margin-top: 15px;
    color: #ff0000;
    font-size: 18px;
}

#result-container {
    margin-top: 20px;
    padding: 15px;
    border: 1px solid #ccc;
    border-radius: 5px;
    display: none;
}

#result-container h3 {
    font-size: 24px;
}

#result-container p {
    margin: 5px 0;
    font-size: 18px;
}

#download-container {
    margin-top: 15px;
    display: none;
}

#downloadInvoiceBtn, #downloadBtn {
    padding: 12px 24px;
    cursor: pointer;
    margin-right: 10px;
    font-size: 18px;
}

#preview-container {
    max-width: 1600px;
    margin: 20px auto;
    padding: 15px;
    border: 1px solid #ccc;
    border-radius: 5px;
    display: none;
}

#preview-container label {
    font-size: 20px;
}

#preview-container select {
    padding: 8px;
    margin-bottom: 10px;
    width: 100%;
    font-size: 18px;
}

#preview-frame {
    width: 100%;
    height: 1200px;
    border: 1px solid #ccc;
}

#purchase-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
    font-size: 18px;
}

#purchase-table th,
#purchase-table td {
    border: 1px solid #ccc;
    padding: 10px;
    text-align: left;
}

#purchase-table th {
    background-color: #f4f4f4;
    font-size: 20px;
}

#purchase-table tr:nth-child(even) {
    background-color: #f9f9f9;
}

#purchase-table tr:hover {
    background-color: #f1f1f1;
}

#purchase-table button {
    padding: 8px 16px;
    font-size: 16px;
    cursor: pointer;
}

#list-message {
    margin-top: 15px;
    color: #ff0000;
    font-size: 18px;
}

.table-container {
    max-width: 1200px;
    margin: 50px auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 18px;
}