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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>To-Do List</title>
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <header>
        <h1>To-Do List</h1>
    </header>

    <main>
        <!-- To-Do Form -->
        <section id="todo-form">
            <h2>Add New To-Do</h2>
            <form id="new-todo-form">
                <label for="todo-title">Title:</label>
                <input type="text" id="todo-title" name="todo-title" required>
                
                <label for="todo-desc">Description:</label>
                <textarea id="todo-desc" name="todo-desc" required></textarea>

                <button type="submit">Add To-Do</button>
            </form>
        </section>

        <!-- To-Do List Section -->
        <section id="todo-list">
            <h2>Your To-Dos</h2>
            <div id="cards-container">
                <!-- Cards will be added here dynamically -->
            </div>
        </section>
    </main>

    <script src="script.js"></script>
</body>
</html>














body {
    font-family: 'Roboto', sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 0;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 1em 0;
    text-align: center;
}

#todo-form, #todo-list {
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}

h2 {
    margin-bottom: 15px;
    font-size: 1.5em;
    color: #333;
}

#new-todo-form label {
    display: block;
    margin: 10px 0 5px;
    font-weight: bold;
}

#new-todo-form input, #new-todo-form textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1em;
}

#new-todo-form button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#new-todo-form button:hover {
    background-color: #45a049;
}

#cards-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.card {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 10px;
    padding: 20px;
    position: relative;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.card h3 {
    margin: 0 0 10px;
}

.card p {
    margin: 0 0 15px;
}

.card-buttons {
    position: absolute;
    top: 20px;
    right: 20px;
}

.card button {
    background-color: #f44336;
    color: white;
    border: none;
    padding: 5px 10px;
    margin-left: 10px;
    border-radius: 5px;
    cursor: pointer;
}

.card button.update {
    background-color: #ffa726;
}

.card button:hover {
    opacity: 0.8;
}














// Initialize to-do list
const todoList = JSON.parse(localStorage.getItem('todos')) || [];

// DOM Elements
const todoForm = document.getElementById('new-todo-form');
const cardsContainer = document.getElementById('cards-container');
let updateMode = false;
let currentIndex = null;

// Function to create a new card
function createCard(todo, index) {
    const card = document.createElement('div');
    card.classList.add('card');
    card.innerHTML = `
        <h3>${todo.title}</h3>
        <p>${todo.description}</p>
        <div class="card-buttons">
            <button class="delete" onclick="deleteTodo(${index})">Delete</button>
            <button class="update" onclick="editTodo(${index})">Update</button>
        </div>
    `;
    cardsContainer.appendChild(card);
}

// Load stored To-Dos on page load
window.onload = function () {
    todoList.forEach((todo, index) => {
        createCard(todo, index);
    });
};

// Form submission event
todoForm.addEventListener('submit', function (e) {
    e.preventDefault();
    
    // Get form values
    const title = document.getElementById('todo-title').value;
    const description = document.getElementById('todo-desc').value;

    // Regex Validation: Title must be at least 3 characters
    const titleRegex = /^[A-Za-z0-9 ]{3,}$/;
    if (!titleRegex.test(title)) {
        alert('Title must be at least 3 characters long and only contain letters and numbers.');
        return;
    }

    // Check if we're in update mode
    if (updateMode) {
        todoList[currentIndex] = { title, description };
        updateMode = false;
        currentIndex = null;
    } else {
        // Create new to-do object
        const newTodo = {
            title: title,
            description: description
        };
        // Add to list and local storage
        todoList.push(newTodo);
    }

    // Update localStorage
    localStorage.setItem('todos', JSON.stringify(todoList));

    // Refresh the UI
    renderTodos();

    // Reset the form
    todoForm.reset();
});

// Function to render all to-dos
function renderTodos() {
    cardsContainer.innerHTML = ''; // Clear existing cards
    todoList.forEach((todo, index) => {
        createCard(todo, index);
    });
}

// Function to delete a todo
function deleteTodo(index) {
    todoList.splice(index, 1); // Remove the to-do
    localStorage.setItem('todos', JSON.stringify(todoList)); // Update localStorage
    renderTodos(); // Re-render the list
}

// Function to edit a todo
function editTodo(index) {
    const todo = todoList[index];
    document.getElementById('todo-title').value = todo.title;
    document.getElementById('todo-desc').value = todo.description;
    updateMode = true;
    currentIndex = index;
}