Juego de memoria con cartas en JavaScript y CSS.

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Juego de memoria con cartas en JavaScript y CSS.

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HTML

CSS

:root {
  --bg-color: #0f172a;
  --card-back: #1e293b;
  --card-front: #3b82f6;
  --text-main: #f8fafc;
  --accent: #10b981;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.game-container {
  width: 100%;
  max-width: 600px;
  padding: 20px;
}

.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.score-board {
  font-size: 1.2rem;
}

.btn {
  background-color: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 16px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.btn:hover {
  opacity: 0.9;
}

/* 4x4 Responsive Grid Matrix */
.game-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  perspective: 1000px; /* Essential for 3D depth perception */
}

/* Card Container Structure */
.card {
  aspect-ratio: 1 / 1;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

/* Flip Event States */
.card.flipped {
  transform: rotateY(180deg);
}

.card.matched {
  transform: rotateY(180deg);
  pointer-events: none;
  opacity: 0.6;
}

/* Card Faces Shared Layout */
.card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

/* Outer/Unflipped state */
.card-back {
  background-color: var(--card-back);
  border: 2px solid #334155;
}

/* Inner/Revealed state */
.card-front {
  background-color: var(--card-front);
  transform: rotateY(180deg);
}

// Array containing card values (emojis mimic raw image components cleanly)
const cardIcons = ['🦊', '🐨', '🦁', '🐯', '🦝', '🐮', '🐷', '🐸'];
let cardsDeck = [...cardIcons, ...cardIcons];

// Application Runtime States
let firstCard = null;
let secondCard = null;
let lockBoard = false;
let moves = 0;
let matchedPairs = 0;

// DOM Selectors
const gridContainer = document.getElementById('game-grid');
const movesDisplay = document.getElementById('moves-count');
const resetBtn = document.getElementById('reset-btn');

// Fisher-Yates Array Shuffle Routine
function shuffle(array) {
  for (let i = array.length - 1; i > 0; i--) {
    const j = Math.floor(Math.random() * (i + 1));
    [array[i], array[array[j]]] = [array[j], array[i]];
  }
  return array;
}

// Generate DOM nodes for cards and append to the grid
function initializeGame() {
  gridContainer.innerHTML = '';
  const shuffledCards = shuffle([...cardsDeck]);

shuffledCards.forEach((icon) => {
    const cardEl = document.createElement('div');
    cardEl.classList.add('card');
    cardEl.dataset.iconName = icon; // Store identifier for matching evaluations

cardEl.innerHTML = `
      <div class="card-face card-back">❓</div>
      <div class="card-face card-front">${icon}</div>
    `;

cardEl.addEventListener('click', flipCard);
    gridContainer.appendChild(cardEl);
  });

// Clear tracking states
  firstCard = null;
  secondCard = null;
  lockBoard = false;
  moves = 0;
  matchedPairs = 0;
  movesDisplay.textContent = moves;
}

// Card Event Handler
function flipCard() {
  if (lockBoard) return;
  if (this === firstCard) return; // Prevent double-clicking the same active element

this.classList.add('flipped');

if (!firstCard) {
    firstCard = this;
    return;
  }

secondCard = this;
  trackMove();
  evaluateMatch();
}

// Increment and render total actions performed
function trackMove() {
  moves++;
  movesDisplay.textContent = moves;
}

// Check if selected cards match
function evaluateMatch() {
  const isMatch = firstCard.dataset.iconName === secondCard.dataset.iconName;
  isMatch ? processMatch() : unflipCards();
}

// Freeze cards if a match is found
function processMatch() {
  firstCard.classList.add('matched');
  secondCard.classList.add('matched');
  
  matchedPairs++;
  if (matchedPairs === cardIcons.length) {
    setTimeout(() => alert(`Victory! You completed the matrix in ${moves} moves.`), 500);
  }

resetTurnState();
}

// Turn cards back over if they don't match
function unflipCards() {
  lockBoard = true;

setTimeout(() => {
    firstCard.classList.remove('flipped');
    secondCard.classList.remove('flipped');
    resetTurnState();
  }, 1000); // 1-second reveal delay window before flipping back
}

// Clear individual turn tracking markers
function resetTurnState() {
  [firstCard, secondCard] = [null, null];
  lockBoard = false;
}

// Bind Action Listeners
resetBtn.addEventListener('click', initializeGame);
document.addEventListener('DOMContentLoaded', initializeGame);

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