body {
            font-family: 'Sarabun', sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f0f2f5;
            color: #333;
        }

        .header {
            background-color: #28a745;
            /* สีเขียว */
            color: white;
            padding: 20px;
            text-align: center;
            font-size: 28px;
            font-weight: 700;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        .container {
            padding: 30px;
            max-width: 600px;
            margin: 20px auto;
            background-color: #ffffff;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }

        h2 {
            text-align: center;
            color: #28a745;
            /* สีเขียว */
            margin-bottom: 30px;
            font-weight: 600;
        }

        .form-group {
            margin-bottom: 20px;
        }

        label {
            display: block;
            margin-bottom: 8px;
            color: #333;
            font-weight: 400;
        }

        input[type="text"],
        input[type="tel"],
        textarea,
        select {
            width: 100%;
            padding: 12px;
            border: 1px solid #ccc;
            border-radius: 5px;
            box-sizing: border-box;
            font-size: 16px;
            color: #555;
        }

        textarea {
            resize: vertical;
            min-height: 100px;
        }

        button {
            background-color: #28a745;
            /* สีเขียว */
            color: white;
            padding: 15px 25px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 18px;
            width: 100%;
            font-weight: 600;
            transition: background-color 0.3s ease;
        }

        button:hover {
            background-color: #218838;
            /* สีเขียวเข้มขึ้น */
        }

        .alert {
            padding: 15px;
            margin-bottom: 20px;
            border-radius: 5px;
            text-align: center;
            font-weight: 600;
        }

        .alert-success {
            background-color: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }

        .alert-danger {
            background-color: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }

        .status-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }

        .status-table th,
        .status-table td {
            border: 1px solid #ddd;
            padding: 12px;
            text-align: left;
        }

        .status-table th {
            background-color: #e9ecef;
            /* สีเทาอ่อน */
            color: #555;
            font-weight: 600;
        }

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

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

        .status-tag {
            display: inline-block;
            padding: 5px 10px;
            border-radius: 4px;
            font-weight: 600;
            color: white;
        }

        .status-pending {
            background-color: #ffc107;
        }

        /* เหลือง */
        .status-received {
            background-color: #17a2b8;
        }

        /* ฟ้า */
        .status-completed {
            background-color: #28a745;
        }

        /* เขียว */

        .chart-section {
            margin-top: 40px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
            gap: 30px;
        }

        .chart-box {
            background-color: #fdfdfd;
            border: 1px solid #eee;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }