body {
            font-family: Arial, sans-serif;
            background-color: #f4f4f4;
            margin: 0;
            padding: 0;
        }
        .container {
            width: 90%;
            max-width: 600px;
            margin: 30px auto;
            background: #fff;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
            text-align:right;
            direction:rtl;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            font-weight: bold;
            margin-bottom: 8px;
        }
        input, textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid #ccc;
            border-radius: 4px;            
            box-sizing: border-box;
            resize:none;            
        }
        textarea {
            height: 100px;
            resize: none;
            font-family:fntYekan;
            font-size: medium;
        }
        input[readonly], textarea[readonly] {
            background-color:white;
            border: 1px solid #ddd;
        }
        .button-container {
            display: flex;
            justify-content: space-between;
            align-items:center;            
        }
        .button-container button {
            flex: 1;             /* همه دکمه‌ها اندازه مساوی بگیرند */
            max-width: 32%;      /* سه‌تایی در یک ردیف بمانند */
            padding: 10px;
            text-align: center;
            padding: 12px 20px;
            font-size: 16px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }
        .btn-order {
            background-color: #4CAF50;
            border-radius:10px;
            font-family:fntYekan;
            font-size:large;
            color: white;
        }
        .btn-preview {
            background-color: #2196F3;
            border-radius:10px;
            font-family:fntYekan;
            font-size:large;
            color: white;
        }
        .btn-back {
            background-color: #f44336;
            border-radius:10px;
            font-family:fntYekan;
            font-size:large;
            color: white;
        }
        /* رسپانسیو */
        @media (max-width: 600px) {
            .container {
                width: 95%;
                padding: 15px;
            }
            .button-container {
                flex-direction: column;
                align-items: center;
            }
            .button-container button {
                width: 100%;
                margin-bottom: 10px;
            }
        }