body {
            font-family: Cambria, serif;
            margin: 0;
            padding: 0;
            background-color: #f8f9fa;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }
        .invoice-container {
            background-color: #ffffff;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            max-width: 600px;
            width: 100%;
            padding: 30px;
        }
        .invoice-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 20px;
        }
        .invoice-header-left img {
            max-width: 150px;
            margin-bottom: 10px;
        }
        .invoice-header-left a {
            color: #0070ba;
            text-decoration: none;
            font-size: 14px;
        }
        .invoice-header-left a:hover {
            text-decoration: underline;
        }
        .invoice-header-right {
            text-align: right;
        }
        .invoice-header-right p {
            margin: 5px 0;
            color: #555;
            font-size: 14px;
        }
        .invoice-header-right strong {
            color: #333;
        }
        .invoice-details {
            margin-bottom: 30px;
        }
        .invoice-details p {
            margin: 10px 0;
            color: #555;
            font-size: 14px;
        }
        .invoice-details strong {
            color: #333;
        }
        .invoice-table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 30px;
        }
        .invoice-table th, .invoice-table td {
            padding: 12px;
            text-align: left;
            border-bottom: 1px solid #ddd;
            font-size: 14px;
        }
        .invoice-table th {
            background-color: #f8f9fa;
            color: #333;
            font-weight: bold;
        }
        .invoice-table td {
            color: #555;
        }
        .total-amount {
            text-align: right;
            margin-bottom: 20px;
        }
        .total-amount strong {
            font-size: 18px;
            color: #333;
        }
        .seller-note {
            background-color: lightblue;
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 30px;
            font-size: 14px;
            color: #555;
        }
        .paypal-button {
            text-align: center;
            margin-bottom: 20px;
        }
        .paypal-button img {
            width: 150px;
        }
        .footer {
            text-align: center;
            margin-top: 20px;
            color: #777;
            font-size: 12px;
        }