/*for the exercises created by Google Gemini on 2026-01-05*/
:root {
            --primary-color: #4a90e2;
            --success-color: #2ecc71;
            --error-color: #e74c3c;
            --bg-color: #f4f7f6;
        }

        /*body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--bg-color);
            display: flex;
            justify-content: center;
            padding: 20px;
            line-height: 1.6;*/
        }

        .container {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            max-width: 600px;
            width: 100%;
        }

      

        .score-board {
            text-align: center;
            font-weight: bold;
            font-size: 1.2rem;
            margin-bottom: 20px;
            color: var(--primary-color);
        }

        .sentence {
            font-size: 1.2rem;
            color: #444;
            margin-bottom: 20px;
        }

        /* The Gap Styling */
        .gap {
            display: inline-block;
            min-width: 60px;
            border-bottom: 2px solid var(--primary-color);
            background: #f0f4f8;
            padding: 2px 8px;
            margin: 0 4px;
            cursor: pointer;
            border-radius: 4px;
            text-align: center;
            transition: all 0.2s;
            font-weight: bold;
            color: var(--primary-color);
        }

        .gap.correct {
            background-color: var(--success-color);
            color: white;
            border-bottom-color: var(--success-color);
        }

        .gap.incorrect {
            background-color: var(--error-color);
            color: white;
            border-bottom-color: var(--error-color);
        }

        /* Mobile Selection Menu */
        #modal-overlay {
            display: none;
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 100;
            justify-content: center;
            align-items: center;
        }

        .modal-content {
            background: white;
            padding: 15px;
            border-radius: 10px;
            width: 80%;
            max-width: 300px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .option-btn {
            padding: 12px;
            font-size: 1.1rem;
            border: 1px solid #ddd;
            border-radius: 8px;
            background: white;
            cursor: pointer;
            transition: background 0.2s;
        }

        .option-btn:active {
            background: #e1e1e1;
        }

        .reset-btn {
            display: block;
            margin: 20px auto 0;
            padding: 10px 20px;
            background: #333;
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }