body {
            font-family: Arial, sans-serif;
            background: #1a1a2e;
            color: #ffffff;
            padding: 40px;
            max-width: 800px;
            margin: 0 auto;
            line-height: 1.6;
        }

        h1 {
            text-align: center;
            color: #64ffda;
            margin-bottom: 40px;
        }

        .story-section {
            background: #16213e;
            padding: 30px;
            border-radius: 10px;
            margin-bottom: 20px;
            border: 2px solid #333;
        }

        .sentence {
            font-size: 1.3em;
            margin-bottom: 20px;
            padding: 15px;
            background: #0f0f23;
            border-radius: 5px;
        }

        .interactive-word {
            background: #64ffda;
            color: #0f0f23;
            padding: 3px 8px;
            border-radius: 3px;
            cursor: pointer;
            font-weight: bold;
            transition: all 0.3s ease;
        }

        .interactive-word:hover {
            background: #4fd3b8;
            transform: scale(1.1);
        }

        .hidden {
            display: none;
        }

        .popup-window {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: #ffffff;
            color: #000000;
            padding: 20px;
            border: 3px solid #999;
            border-radius: 5px;
            box-shadow: 0 0 20px rgba(0,0,0,0.5);
            z-index: 1000;
            min-width: 300px;
            text-align: center;
        }

        .popup-buttons {
            margin-top: 15px;
        }

        .popup-btn {
            background: #007acc;
            color: white;
            border: none;
            padding: 8px 16px;
            margin: 0 5px;
            border-radius: 3px;
            cursor: pointer;
            font-size: 14px;
        }

        .popup-btn:hover {
            background: #005a99;
        }

        .popup-btn.cancel {
            background: #cc0000;
        }

        .popup-btn.cancel:hover {
            background: #990000;
        }

        .computer-screen {
            background: #000000;
            border: 10px solid #333;
            border-radius: 10px;
            padding: 20px;
            margin: 20px 0;
            font-family: 'Courier New', monospace;
            color: #00ff00;
            min-height: 100px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .computer-screen:hover {
            box-shadow: 0 0 20px rgba(0, 255, 0, 0.3);
        }

        .download-bar {
            width: 100%;
            height: 20px;
            background: #333;
            border-radius: 10px;
            overflow: hidden;
            margin: 10px 0;
        }

        .download-progress {
            height: 100%;
            background: linear-gradient(90deg, #00ff00, #66ff66);
            width: 0%;
            transition: width 3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #000;
            font-weight: bold;
        }

        .result-text {
            font-size: 1.2em;
            margin: 20px 0;
            padding: 15px;
            border-left: 4px solid #64ffda;
            background: rgba(100, 255, 218, 0.1);
            font-family: monospace;
            color: #64ffda;
        }

        .caret {
            display: inline-block;
            width: 10px;
            background: #64ffda;
            margin-left: 2px;
            animation: blink 1s step-end infinite;
        }

        @keyframes blink {
            50% { background: transparent; }
        }