body {
            font-family: Arial, Helvetica, sans-serif;
            background: #f4f6f3;
            margin: 0;
        }

        .header {
            background: #2e7d32;
            color: white;
            padding: 15px 30px;
            font-size: 20px;
            font-weight: bold;
        }

        .container {
            max-width: 900px;
            margin: 50px auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .card {
            background: white;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
        }

        h3 {
            margin-top: 0;
        }

        input {
            width: 100%;
            padding: 12px;
            margin: 10px 0;
            border: 1px solid #ddd;
            border-radius: 6px;
        }

        .summary p {
            margin: 10px 0;
            font-size: 16px;
        }

        .total {
            font-size: 18px;
            font-weight: bold;
            margin-top: 15px;
        }

        button {
            width: 100%;
            background: #2e7d32;
            color: white;
            border: none;
            padding: 12px;
            border-radius: 6px;
            font-size: 16px;
            cursor: pointer;
            margin-top: 20px;
        }

        button:hover {
            background: #256628;
        }