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<!DOCTYPE html>
<html lang="en" class="dark">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Flash Card Study Simulator</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        /* Custom themes */
        .blue-theme {
            --tw-bg-opacity: 1;
            --tw-text-opacity: 1;
            --color-primary: 59 130 246;
            --color-secondary: 191 219 254;
        }
        
        .green-theme {
            --tw-bg-opacity: 1;
            --tw-text-opacity: 1;
            --color-primary: 34 197 94;
            --color-secondary: 187 247 208;
        }
        
        .blue-theme .card {
            background: linear-gradient(to bottom right, var(--color-secondary), white);
        }
        
        .green-theme .card {
            background: linear-gradient(to bottom right, var(--color-secondary), white);
        }
        
        .card {
            perspective: 1000px;
            transform-style: preserve-3d;
            transition: all 0.5s ease;
        }
        .card-inner {
            transition: transform 0.6s;
            transform-style: preserve-3d;
        }
        .card.flipped .card-inner {
            transform: rotateY(180deg);
        }
        .card-front, .card-back {
            backface-visibility: hidden;
            position: absolute;
            width: 100%;
            height: 100%;
        }
        .card-back {
            transform: rotateY(180deg);
        }
        .fade-in {
            animation: fadeIn 0.3s ease-in;
        }
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        .progress-bar {
            transition: width 0.3s ease;
        }
    </style>
</head>
<body class="bg-gray-100 dark:bg-gray-900 min-h-screen transition-colors duration-300">
    <div class="container mx-auto px-4 py-8 max-w-4xl">
        <!-- Header -->
        <header class="flex justify-between items-center mb-8">
            <h1 class="text-3xl font-bold text-gray-800 dark:text-white" id="mainTitle">Flash Card Simulator</h1>
            <div class="flex items-center space-x-2">
                <button id="enLangBtn" class="p-2 rounded-full bg-blue-500 text-white" title="English">
                    EN
                </button>
                <button id="ptLangBtn" class="p-2 rounded-full bg-gray-200 dark:bg-gray-700 text-gray-700 dark:text-gray-200" title="Português">
                    PT
                </button>
            <div class="flex items-center space-x-2">
                <button id="lightThemeBtn" class="p-2 rounded-full bg-gray-200 text-gray-700" title="Light Theme">
                    <i class="fas fa-sun"></i>
                </button>
                <button id="darkThemeBtn" class="p-2 rounded-full bg-gray-700 text-gray-200" title="Dark Theme">
                    <i class="fas fa-moon"></i>
                </button>
                <button id="blueThemeBtn" class="p-2 rounded-full bg-blue-100 text-blue-700" title="Blue Theme">
                    <i class="fas fa-droplet"></i>
                </button>
                <button id="greenThemeBtn" class="p-2 rounded-full bg-green-100 text-green-700" title="Green Theme">
                    <i class="fas fa-leaf"></i>
                </button>
            </div>
        </header>

        <!-- Main Content -->
        <div class="grid grid-cols-1 xl:grid-cols-2 gap-8">
            <!-- Input Section -->
            <div id="inputSection" class="bg-white dark:bg-gray-800 rounded-xl shadow-lg p-6 transition-all duration-300">
                <h2 class="text-xl font-semibold mb-4 text-gray-800 dark:text-white">Create Your Cards</h2>
                
                <div class="mb-4">
                    <label class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">Deck Title</label>
                    <input type="text" id="deckTitle" placeholder="My Study Deck" 
                           class="w-full px-4 py-2 rounded-lg border border-gray-300 dark:border-gray-600 bg-white dark:bg-gray-700 text-gray-900 dark:text-white focus:ring-2 focus:ring-blue-500 focus:border-blue-500">
                </div>
                
                <div id="cardInputs" class="space-y-4">
                    <div class="card-input-group flex items-start space-x-2">
                        <div class="flex-1 space-y-2">
                            <input type="text" placeholder="Term" class="w-full px-3 py-2 rounded-lg border border-gray-300 dark:border-gray-600 bg-white dark:bg-gray-700 text-gray-900 dark:text-white">
                            <textarea placeholder="Definition" rows="2" class="w-full px-3 py-2 rounded-lg border border-gray-300 dark:border-gray-600 bg-white dark:bg-gray-700 text-gray-900 dark:text-white"></textarea>
                            <select class="w-full px-3 py-2 rounded-lg border border-gray-300 dark:border-gray-600 bg-white dark:bg-gray-700 text-gray-900 dark:text-white">
                                <option value="easy">Easy</option>
                                <option value="medium">Medium</option>
                                <option value="hard">Hard</option>
                            </select>
                        </div>
                        <button class="remove-card-btn mt-2 text-red-500 hover:text-red-700 dark:hover:text-red-400">
                            <i class="fas fa-times"></i>
                        </button>
                    </div>
                </div>
                
                <div class="flex justify-between mt-6">
                    <button id="addCardBtn" class="px-4 py-2 bg-blue-500 hover:bg-blue-600 text-white rounded-lg transition-colors">
                        <i class="fas fa-plus mr-2"></i>Add Card
                    </button>
                    <button id="startStudyBtn" class="px-4 py-2 bg-green-500 hover:bg-green-600 text-white rounded-lg transition-colors">
                        <i class="fas fa-play mr-2"></i>Start Studying
                    </button>
                </div>
            </div>

            <!-- Preview Section -->
            <div id="previewSection" class="bg-white dark:bg-gray-800 rounded-xl shadow-lg p-6 transition-all duration-300">
                <h2 class="text-xl font-semibold mb-4 text-gray-800 dark:text-white">Preview</h2>
                <div class="flex justify-center">
                    <div class="card w-full max-w-md h-64 bg-gradient-to-br from-purple-100 via-pink-100 to-yellow-100 dark:from-purple-900 dark:via-pink-900 dark:to-yellow-900 rounded-xl shadow-lg cursor-pointer transform hover:scale-105 transition-transform duration-300" id="previewCard">
                        <div class="card-inner h-full">
                            <div class="card-front flex flex-col justify-center items-center h-full p-6">
                                <p class="text-gray-500 dark:text-gray-300 text-sm">Term</p>
                                <h3 class="text-2xl font-bold text-center text-gray-800 dark:text-white mt-2">Sample Term</h3>
                            </div>
                            <div class="card-back flex flex-col justify-center items-center h-full p-6">
                                <p class="text-gray-500 dark:text-gray-300 text-sm">Definition</p>
                                <p class="text-lg text-center text-gray-700 dark:text-gray-200 mt-2">Sample definition goes here...</p>
                            </div>
                        </div>
                    </div>
                </div>
                <p class="text-sm text-gray-500 dark:text-gray-400 text-center mt-4">Click the card to flip</p>
            </div>
        </div>

        <!-- Study Mode Section (Hidden Initially) -->
        <div id="studySection" class="hidden bg-white dark:bg-gray-800 rounded-xl shadow-lg p-6 mt-8 transition-all duration-300">
            <div class="flex justify-between items-center mb-6">
                <h2 id="studyDeckTitle" class="text-xl font-semibold text-gray-800 dark:text-white">Studying: My Deck</h2>
                <button id="exitStudyBtn" class="px-3 py-1 bg-gray-200 dark:bg-gray-700 text-gray-700 dark:text-gray-200 rounded-lg hover:bg-gray-300 dark:hover:bg-gray-600 transition-colors">
                    Exit Study Mode
                </button>
            </div>
            
            <!-- Progress Bar -->
            <div class="mb-6">
                <div class="flex justify-between mb-1">
                    <span id="progressText" class="text-sm font-medium text-gray-700 dark:text-gray-300">0/0 cards</span>
                    <span id="scoreText" class="text-sm font-medium text-gray-700 dark:text-gray-300">Score: 0%</span>
                </div>
                <div class="w-full bg-gray-200 dark:bg-gray-700 rounded-full h-2.5">
                    <div id="progressBar" class="progress-bar bg-blue-500 h-2.5 rounded-full" style="width: 0%"></div>
                </div>
            </div>
            
            <!-- Flash Card -->
            <div class="flex justify-center mb-8">
                <div class="card w-full max-w-md h-80 bg-gradient-to-br from-blue-50 to-blue-100 dark:from-gray-700 dark:to-gray-600 blue-theme:from-blue-100 blue-theme:to-white green-theme:from-green-100 green-theme:to-white rounded-xl shadow-lg cursor-pointer" id="studyCard">
                    <div class="card-inner h-full">
                        <div class="card-front flex flex-col justify-center items-center h-full p-6">
                            <p class="text-gray-500 dark:text-gray-300 text-sm">Term</p>
                            <h3 id="cardTerm" class="text-3xl font-bold text-center text-gray-800 dark:text-white mt-4">Loading...</h3>
                        </div>
                        <div class="card-back flex flex-col justify-center items-center h-full p-6">
                            <p class="text-gray-500 dark:text-gray-300 text-sm">Definition</p>
                            <p id="cardDefinition" class="text-xl text-center text-gray-700 dark:text-gray-200 mt-4">Loading...</p>
                        </div>
                    </div>
                </div>
            </div>
            
            <!-- Controls -->
            <div class="flex flex-col sm:flex-row justify-center space-y-4 sm:space-y-0 sm:space-x-4">
                <button id="knewItBtn" class="px-6 py-3 bg-green-500 hover:bg-green-600 text-white rounded-lg transition-colors">
                    <i class="fas fa-check mr-2"></i>Knew It
                </button>
                <button id="flipCardBtn" class="px-6 py-3 bg-blue-500 hover:bg-blue-600 text-white rounded-lg transition-colors">
                    <i class="fas fa-sync-alt mr-2"></i>Flip Card
                </button>
                <button id="didntKnowBtn" class="px-6 py-3 bg-red-500 hover:bg-red-600 text-white rounded-lg transition-colors">
                    <i class="fas fa-times mr-2"></i>Didn't Know
                </button>
            </div>
        </div>
    </div>

    <script>
        // Theme Management
        const themes = {
            light: {
                class: '',
                icon: 'fa-sun',
                bg: 'bg-gray-200',
                text: 'text-gray-700'
            },
            dark: {
                class: 'dark',
                icon: 'fa-moon',
                bg: 'bg-gray-700',
                text: 'text-gray-200'
            },
            blue: {
                class: 'blue-theme',
                icon: 'fa-droplet',
                bg: 'bg-blue-100',
                text: 'text-blue-700'
            },
            green: {
                class: 'green-theme',
                icon: 'fa-leaf',
                bg: 'bg-green-100',
                text: 'text-green-700'
            }
        };

        // Set theme
        function setTheme(themeName) {
            // Remove all theme classes first
            document.documentElement.classList.remove('dark', 'blue-theme', 'green-theme');
            
            // Add selected theme class
            if (themeName !== 'light') {
                document.documentElement.classList.add(themes[themeName].class);
            }
            
            // Update active button styles
            Object.keys(themes).forEach(theme => {
                const btn = document.getElementById(`${theme}ThemeBtn`);
                if (btn) {
                    btn.className = `p-2 rounded-full ${theme === themeName ? 
                        `${themes[theme].bg} ${themes[theme].text}` : 
                        'bg-gray-200 dark:bg-gray-700 text-gray-700 dark:text-gray-200'}`;
                }
            });
            
            // Save to localStorage
            localStorage.setItem('theme', themeName);
        }

        // Translation texts
        const translations = {
            en: {
                title: "Flash Card Simulator",
                createCards: "Create Your Cards",
                deckTitle: "Deck Title",
                term: "Term",
                definition: "Definition",
                difficulty: "Difficulty",
                preview: "Preview",
                addCard: "Add Card",
                startStudy: "Start Studying",
                studying: "Studying",
                exitStudy: "Exit Study Mode",
                knewIt: "Knew It",
                flipCard: "Flip Card",
                didntKnow: "Didn't Know"
            },
            pt: {
                title: "Simulador de Cartões",
                createCards: "Crie Seus Cartões",
                deckTitle: "Título do Baralho",
                term: "Termo",
                definition: "Definição",
                difficulty: "Dificuldade",
                preview: "Pré-visualização",
                addCard: "Adicionar Cartão",
                startStudy: "Começar a Estudar",
                studying: "Estudando",
                exitStudy: "Sair do Modo Estudo",
                knewIt: "Sabia",
                flipCard: "Virar Cartão",
                didntKnow: "Não Sabia"
            }
        };

        // Set language
        function setLanguage(lang) {
            document.getElementById('mainTitle').textContent = translations[lang].title;
            document.querySelector('#inputSection h2').textContent = translations[lang].createCards;
            document.querySelector('#inputSection label').textContent = translations[lang].deckTitle;
            document.querySelector('#previewSection h2').textContent = translations[lang].preview;
            document.getElementById('addCardBtn').innerHTML = `<i class="fas fa-plus mr-2"></i>${translations[lang].addCard}`;
            document.getElementById('startStudyBtn').innerHTML = `<i class="fas fa-play mr-2"></i>${translations[lang].startStudy}`;
            document.getElementById('studyDeckTitle').textContent = `${translations[lang].studying}: My Deck`;
            document.getElementById('exitStudyBtn').textContent = translations[lang].exitStudy;
            document.getElementById('knewItBtn').innerHTML = `<i class="fas fa-check mr-2"></i>${translations[lang].knewIt}`;
            document.getElementById('flipCardBtn').innerHTML = `<i class="fas fa-sync-alt mr-2"></i>${translations[lang].flipCard}`;
            document.getElementById('didntKnowBtn').innerHTML = `<i class="fas fa-times mr-2"></i>${translations[lang].didntKnow}`;
            
            // Update all input placeholders
            document.querySelectorAll('#cardInputs input[type="text"]').forEach(input => {
                input.placeholder = translations[lang].term;
            });
            document.querySelectorAll('#cardInputs textarea').forEach(textarea => {
                textarea.placeholder = translations[lang].definition;
            });
            document.querySelectorAll('#cardInputs select').forEach(select => {
                select.innerHTML = `
                    <option value="easy">${translations[lang].easy || 'Easy'}</option>
                    <option value="medium">${translations[lang].medium || 'Medium'}</option>
                    <option value="hard">${translations[lang].hard || 'Hard'}</option>
                `;
            });

            // Update active button
            document.getElementById('enLangBtn').className = `p-2 rounded-full ${lang === 'en' ? 'bg-blue-500 text-white' : 'bg-gray-200 dark:bg-gray-700 text-gray-700 dark:text-gray-200'}`;
            document.getElementById('ptLangBtn').className = `p-2 rounded-full ${lang === 'pt' ? 'bg-blue-500 text-white' : 'bg-gray-200 dark:bg-gray-700 text-gray-700 dark:text-gray-200'}`;
            
            localStorage.setItem('language', lang);
        }

        // Initialize theme and language
        const savedTheme = localStorage.getItem('theme') || 
                          (window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light');
        setTheme(savedTheme);

        const savedLanguage = localStorage.getItem('language') || 'en';
        setLanguage(savedLanguage);

        // Language buttons
        document.getElementById('enLangBtn').addEventListener('click', () => setLanguage('en'));
        document.getElementById('ptLangBtn').addEventListener('click', () => setLanguage('pt'));

        // Theme buttons
        document.getElementById('lightThemeBtn').addEventListener('click', () => setTheme('light'));
        document.getElementById('darkThemeBtn').addEventListener('click', () => setTheme('dark'));
        document.getElementById('blueThemeBtn').addEventListener('click', () => setTheme('blue'));
        document.getElementById('greenThemeBtn').addEventListener('click', () => setTheme('green'));

        // Card Management
        let cards = [];
        let currentCardIndex = 0;
        let knownCards = 0;
        let totalCards = 0;

        // Add new card input
        document.getElementById('addCardBtn').addEventListener('click', () => {
            const cardInputs = document.getElementById('cardInputs');
            const newCard = document.createElement('div');
            newCard.className = 'card-input-group flex items-start space-x-2 fade-in';
            newCard.innerHTML = `
                <div class="flex-1 space-y-2">
                    <input type="text" placeholder="Term" class="w-full px-3 py-2 rounded-lg border border-gray-300 dark:border-gray-600 bg-white dark:bg-gray-700 text-gray-900 dark:text-white">
                    <textarea placeholder="Definition" rows="2" class="w-full px-3 py-2 rounded-lg border border-gray-300 dark:border-gray-600 bg-white dark:bg-gray-700 text-gray-900 dark:text-white"></textarea>
                </div>
                <button class="remove-card-btn mt-2 text-red-500 hover:text-red-700 dark:hover:text-red-400">
                    <i class="fas fa-times"></i>
                </button>
            `;
            cardInputs.appendChild(newCard);
            
            // Add event to remove button
            newCard.querySelector('.remove-card-btn').addEventListener('click', () => {
                newCard.classList.add('opacity-0', 'h-0', 'overflow-hidden', 'transition-all', 'duration-300');
                setTimeout(() => newCard.remove(), 300);
            });
            
            // Update preview
            updatePreview();
        });

        // Update preview card
        function updatePreview() {
            const inputs = document.querySelectorAll('.card-input-group');
            if (inputs.length > 0) {
                const lastInput = inputs[inputs.length - 1];
                const term = lastInput.querySelector('input').value || 'Sample Term';
                const definition = lastInput.querySelector('textarea').value || 'Sample definition goes here...';
                
                document.querySelector('#previewCard .card-front h3').textContent = term;
                document.querySelector('#previewCard .card-back p:nth-child(2)').textContent = definition;
            }
        }

        // Add input listeners for live preview
        document.getElementById('cardInputs').addEventListener('input', (e) => {
            if (e.target.tagName === 'INPUT' || e.target.tagName === 'TEXTAREA') {
                updatePreview();
            }
        });

        // Flip card functionality for preview
        document.getElementById('previewCard').addEventListener('click', function() {
            this.classList.toggle('flipped');
        });

        // Start study session
        document.getElementById('startStudyBtn').addEventListener('click', () => {
            const deckTitle = document.getElementById('deckTitle').value || 'My Study Deck';
            const cardInputs = document.querySelectorAll('.card-input-group');
            
            if (cardInputs.length === 0) {
                alert('Please add at least one flash card before starting.');
                return;
            }
            
            // Collect all cards
            cards = [];
            cardInputs.forEach(input => {
                const term = input.querySelector('input').value.trim();
                const definition = input.querySelector('textarea').value.trim();
                
                if (term && definition) {
                    cards.push({
                        term,
                        definition,
                        known: false
                    });
                }
            });
            
            if (cards.length === 0) {
                alert('Please fill in both term and definition for at least one card.');
                return;
            }
            
            // Shuffle cards
            shuffleArray(cards);
            
            // Reset study stats
            currentCardIndex = 0;
            knownCards = 0;
            totalCards = cards.length;
            
            // Update UI
            document.getElementById('studyDeckTitle').textContent = `Studying: ${deckTitle}`;
            document.getElementById('inputSection').classList.add('hidden');
            document.getElementById('previewSection').classList.add('hidden');
            document.getElementById('studySection').classList.remove('hidden');
            
            // Show first card
            showCurrentCard();
            updateProgress();
        });

        // Exit study mode
        document.getElementById('exitStudyBtn').addEventListener('click', () => {
            document.getElementById('inputSection').classList.remove('hidden');
            document.getElementById('previewSection').classList.remove('hidden');
            document.getElementById('studySection').classList.add('hidden');
        });

        // Show current card in study mode
        function showCurrentCard() {
            if (currentCardIndex < cards.length) {
                const card = cards[currentCardIndex];
                document.getElementById('cardTerm').textContent = card.term;
                document.getElementById('cardDefinition').textContent = card.definition;
                
                // Ensure card is not flipped when showing new card
                const studyCard = document.getElementById('studyCard');
                studyCard.classList.remove('flipped');
            } else {
                // Study session complete
                const score = Math.round((knownCards / totalCards) * 100);
                document.getElementById('cardTerm').textContent = 'Study Complete!';
                document.getElementById('cardDefinition').textContent = `You knew ${knownCards} of ${totalCards} cards (${score}%)`;
                
                // Disable buttons
                document.getElementById('knewItBtn').disabled = true;
                document.getElementById('didntKnowBtn').disabled = true;
                document.getElementById('flipCardBtn').disabled = true;
            }
        }

        // Update progress bar and text
        function updateProgress() {
            const progress = Math.round(((currentCardIndex) / totalCards) * 100);
            const score = currentCardIndex > 0 ? Math.round((knownCards / currentCardIndex) * 100) : 0;
            
            document.getElementById('progressText').textContent = `${currentCardIndex}/${totalCards} cards`;
            document.getElementById('scoreText').textContent = `Score: ${score}%`;
            document.getElementById('progressBar').style.width = `${progress}%`;
        }

        // Flip card in study mode
        document.getElementById('flipCardBtn').addEventListener('click', () => {
            document.getElementById('studyCard').classList.toggle('flipped');
        });

        // Click card to flip in study mode
        document.getElementById('studyCard').addEventListener('click', function() {
            this.classList.toggle('flipped');
        });

        // Knew it button
        document.getElementById('knewItBtn').addEventListener('click', () => {
            if (currentCardIndex < cards.length) {
                cards[currentCardIndex].known = true;
                knownCards++;
                currentCardIndex++;
                showCurrentCard();
                updateProgress();
            }
        });

        // Didn't know button
        document.getElementById('didntKnowBtn').addEventListener('click', () => {
            if (currentCardIndex < cards.length) {
                cards[currentCardIndex].known = false;
                currentCardIndex++;
                showCurrentCard();
                updateProgress();
            }
        });

        // Utility function to shuffle array
        function shuffleArray(array) {
            for (let i = array.length - 1; i > 0; i--) {
                const j = Math.floor(Math.random() * (i + 1));
                [array[i], array[j]] = [array[j], array[i]];
            }
            return array;
        }
    </script>
<p style="border-radius: 8px; text-align: center; font-size: 12px; color: #fff; margin-top: 16px;position: fixed; left: 8px; bottom: 8px; z-index: 10; background: rgba(0, 0, 0, 0.8); padding: 4px 8px;">Made with <img src="https://enzostvs-deepsite.hf.space/logo.svg" alt="DeepSite Logo" style="width: 16px; height: 16px; vertical-align: middle;display:inline-block;margin-right:3px;filter:brightness(0) invert(1);"><a href="https://enzostvs-deepsite.hf.space" style="color: #fff;text-decoration: underline;" target="_blank" >DeepSite</a> - 🧬 <a href="https://enzostvs-deepsite.hf.space?remix=DanielMoz/flashcard-simulator" style="color: #fff;text-decoration: underline;" target="_blank" >Remix</a></p></body>
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