body {
            font-family: 'Adobe Arabic', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            direction: rtl;
            text-align: right;
            background-color: #f4f6f9;
            color: #222;
            margin: 0;
            padding: 0;
        }

        .container {
            width: 96%;
            max-width: 1100px;
            margin: 30px auto;
            padding: 25px;
            background: #fff;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            border-radius: 10px;
            border-top: 6px solid #3498db;
        }

      h1, h2 {
    color: #1a5276;
    text-align: center;
    border-bottom: 2px solid #3498db;
    padding-bottom: 8px;
    margin-bottom: 20px;
    font-size: 22px; 
}

        .form-group {
            margin-bottom: 22px;
        }

        label {
            display: block;
            margin-bottom: 10px;
            font-weight: bold;
            color: #1a5276;
            font-size: 18px;
        }

        textarea {
            width: 100%;
            min-height: 160px;
            padding: 14px 16px;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 17px;
            font-family: 'Adobe Arabic', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            box-sizing: border-box;
            overflow-x: auto;
            background-color: #fbfcfd;
            resize: vertical;
        }

        button {
            background: #3498db;
            color: white;
            padding: 12px 28px;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-size: 17px;
            font-weight: bold;
            transition: background 0.3s;
        }

        button:hover {
            background: #2471a3;
        }

        pre {
            background: #f9f9fb;
            padding: 18px;
            border-radius: 6px;
            border: 1px solid #ccc;
            overflow-x: auto;
            font-family: 'Courier New', Courier, monospace;
            font-size: 16px;
            white-space: pre;
            line-height: 1.4;
        }

        .syllable-diagram-container {
            margin: 30px 0;
            padding: 20px;
            background: #f0f8ff;
            border-radius: 6px;
            border: 1px solid #d6eaf8;
        }

        .syllable-diagram-container p {
            font-weight: bold;
            margin-bottom: 12px;
            color: #1a5276;
        }

        .back-button {
            display: inline-block;
            background: #3498db;
            color: white;
            padding: 10px 24px;
            margin: 15px 5px;
            border-radius: 6px;
            text-decoration: none;
            font-weight: bold;
            transition: background 0.3s;
        }

        .back-button:hover {
            background: #2471a3;
        }

        .button-container {
            text-align: center;
            margin-top: 25px;
        }

        .scroll-hint {
            font-size: 14px;
            color: #7f8c8d;
            text-align: center;
            margin-top: 6px;
        }

        .error-message {
            color: #c0392b;
            background: #fef0ef;
            padding: 16px;
            border-radius: 6px;
            border: 1px solid #e74c3c;
            margin-bottom: 20px;
            text-align: center;
            font-weight: bold;
        }

        .onset {
            color: #3498db;
            font-weight: bold;
        }

        .nucleus {
            color: #27ae60;
            font-weight: bold;
        }

        .coda {
            color: #e74c3c;
            font-weight: bold;
        }

        .label {
            color: #34495e;
            font-weight: bold;
        }

        .label.onset-label {
            color: #2980b9;
        }

        .label.rime-label {
            color: #2c3e50;
        }

        .label.nucleus-label {
            color: #27ae60;
        }

        .label.coda-label {
            color: #e74c3c;
        }

        .branch {
            color: #000;
        }

        .implicit-nucleus {
            color: #8E44AD;
            font-style: italic;
        }

        @media (max-width: 768px) {
            .container {
                width: 100%;
                margin: 10px;
                padding: 15px;
                box-shadow: none;
            }

            pre {
                font-size: 15px;
                padding: 12px;
            }

            textarea {
                font-size: 16px;
            }
        }