2048/index.html at main · ShowMeTheStack/2048 · GitHub

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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, user-scalable=no">
<title>2048</title>
<style>
  *{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
  html,body{height:100%;overflow:hidden;touch-action:none}
  body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;display:flex;align-items:center;justify-content:center;background:#0a0a1a;color:#e0e0e0;user-select:none}

  #app{display:flex;flex-direction:column;align-items:center;gap:14px;width:100%;max-width:520px;padding:16px}

  h1{font-size:2.8rem;font-weight:900;letter-spacing:-2px;background:linear-gradient(135deg,#ff6b6b,#feca57,#48dbfb,#ff9ff3);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-shadow:none;filter:drop-shadow(0 0 20px rgba(255,107,107,.3))}

  .top-bar{display:flex;width:100%;justify-content:space-between;align-items:center;gap:10px}
  .score-box{background:linear-gradient(145deg,#1a1a2e,#16213e);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:8px 18px;text-align:center;flex:1;position:relative;overflow:hidden}
  .score-box::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,#ff6b6b,#feca57)}
  .score-box label{font-size:.65rem;text-transform:uppercase;letter-spacing:2px;color:#888}
  .score-box .val{font-size:1.5rem;font-weight:800;color:#fff}

  .controls{display:flex;gap:8px;width:100%;justify-content:center;flex-wrap:wrap}
  .btn{background:linear-gradient(145deg,#1a1a2e,#16213e);border:1px solid rgba(255,255,255,.1);color:#ccc;padding:10px 18px;border-radius:10px;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .2s;letter-spacing:.5px}
  .btn:hover{border-color:rgba(255,255,255,.25);color:#fff;transform:translateY(-1px);box-shadow:0 4px 15px rgba(0,0,0,.3)}
  .btn.active{border-color:#ff6b6b;color:#ff6b6b;box-shadow:0 0 15px rgba(255,107,107,.15)}

  #board-wrap{position:relative;width:100%;aspect-ratio:1/1;max-width:480px}

  #board{width:100%;height:100%;display:grid;gap:8px;padding:8px;background:linear-gradient(145deg,#1a1a2e,#0f1628);border-radius:16px;border:1px solid rgba(255,255,255,.06);box-shadow:0 8px 32px rgba(0,0,0,.5),inset 0 1px 0 rgba(255,255,255,.05)}

  .cell{border-radius:10px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.04)}

  .tile{position:absolute;display:flex;align-items:center;justify-content:center;border-radius:10px;font-weight:900;transition:top .14s ease,left .14s ease;z-index:2;text-shadow:0 1px 3px rgba(0,0,0,.3);box-shadow:0 4px 15px rgba(0,0,0,.3)}
  .tile.new{animation:pop .25s ease}
  .tile.merged{animation:pulse .3s ease;z-index:3}

  @keyframes pop{0%{transform:scale(0)}60%{transform:scale(1.15)}100%{transform:scale(1)}}
  @keyframes pulse{0%{transform:scale(1)}40%{transform:scale(1.2)}100%{transform:scale(1)}}

  .overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:rgba(10,10,26,.85);backdrop-filter:blur(8px);border-radius:16px;z-index:10;opacity:0;pointer-events:none;transition:opacity .3s}
  .overlay.show{opacity:1;pointer-events:auto}
  .overlay h2{font-size:2rem;margin-bottom:12px}
  .overlay .btn{font-size:1rem;padding:14px 32px}

  .win h2{background:linear-gradient(135deg,#feca57,#ff6b6b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
  .lose h2{color:#ff6b6b}

  /* tile colors */
  .t2{background:linear-gradient(145deg,#2d2d44,#23233a);color:#aab}
  .t4{background:linear-gradient(145deg,#33334d,#292946);color:#bbf}
  .t8{background:linear-gradient(145deg,#c5703a,#b85e2a);color:#fff}
  .t16{background:linear-gradient(145deg,#d4613a,#c44e28);color:#fff}
  .t32{background:linear-gradient(145deg,#e04848,#cf3535);color:#fff}
  .t64{background:linear-gradient(145deg,#e83030,#d41a1a);color:#fff}
  .t128{background:linear-gradient(145deg,#e8c84a,#d4b43a);color:#fff;box-shadow:0 0 20px rgba(232,200,74,.3)}
  .t256{background:linear-gradient(145deg,#e8c230,#d4ae1c);color:#fff;box-shadow:0 0 25px rgba(232,194,48,.35)}
  .t512{background:linear-gradient(145deg,#e8be18,#d4aa04);color:#fff;box-shadow:0 0 30px rgba(232,190,24,.4)}
  .t1024{background:linear-gradient(145deg,#7c3aed,#6d28d9);color:#fff;box-shadow:0 0 30px rgba(124,58,237,.4)}
  .t2048{background:linear-gradient(145deg,#ec4899,#db2777);color:#fff;box-shadow:0 0 40px rgba(236,72,153,.5)}
  .t4096{background:linear-gradient(145deg,#06b6d4,#0891b2);color:#fff;box-shadow:0 0 40px rgba(6,182,212,.5)}
  .t8192{background:linear-gradient(145deg,#10b981,#059669);color:#fff;box-shadow:0 0 40px rgba(16,185,129,.5)}
  .t16384{background:linear-gradient(145deg,#f59e0b,#d97706);color:#fff;box-shadow:0 0 45px rgba(245,158,11,.5)}
  .t32768{background:linear-gradient(145deg,#ef4444,#dc2626);color:#fff;box-shadow:0 0 50px rgba(239,68,68,.6);animation:glow 2s ease-in-out infinite alternate}
  @keyframes glow{0%{box-shadow:0 0 30px rgba(239,68,68,.4)}100%{box-shadow:0 0 60px rgba(239,68,68,.7)}}

  .particles{position:absolute;inset:0;pointer-events:none;z-index:0;border-radius:16px;overflow:hidden}

  @media(max-width:540px){
    #app{padding:10px;gap:10px}
    h1{font-size:2rem}
    .score-box .val{font-size:1.2rem}
    .btn{padding:8px 14px;font-size:.78rem}
    #board{gap:6px;padding:6px}
    .cell,.tile{border-radius:8px}
  }
  @media(max-width:360px){
    h1{font-size:1.6rem}
    #board{gap:4px;padding:4px}
  }
</style>
</head>
<body>
<div id="app">
  <h1>2048</h1>
  <div class="top-bar">
    <div class="score-box"><label>Score</label><div class="val" id="score">0</div></div>
    <div class="score-box"><label>Best</label><div class="val" id="best">0</div></div>
  </div>
  <div class="controls">
    <button class="btn active" data-size="4">4×4</button>
    <button class="btn" data-size="5">5×5</button>
    <button class="btn" data-size="6">6×6</button>
    <button class="btn" id="newBtn">New Game</button>
  </div>
  <div id="board-wrap">
    <div id="board"></div>
    <div class="particles" id="particles"></div>
    <div class="overlay win" id="winOverlay"><h2>You Win!</h2><button class="btn" id="continueBtn">Continue</button></div>
    <div class="overlay lose" id="loseOverlay"><h2>Game Over</h2><button class="btn" id="retryBtn">Try Again</button></div>
  </div>
</div>

<script>
(function(){
  const board=document.getElementById('board'),
        boardWrap=document.getElementById('board-wrap'),
        scoreEl=document.getElementById('score'),
        bestEl=document.getElementById('best'),
        winOv=document.getElementById('winOverlay'),
        loseOv=document.getElementById('loseOverlay'),
        particlesEl=document.getElementById('particles');

  let N=4,grid,score,best=+localStorage.getItem('2048best')||0,won,keepPlaying,moving=false;
  bestEl.textContent=best;

  // Size buttons
  document.querySelectorAll('[data-size]').forEach(b=>{
    b.addEventListener('click',()=>{
      document.querySelectorAll('[data-size]').forEach(x=>x.classList.remove('active'));
      b.classList.add('active');
      N=+b.dataset.size;
      init();
    });
  });
  document.getElementById('newBtn').addEventListener('click',init);
  document.getElementById('continueBtn').addEventListener('click',()=>{keepPlaying=true;winOv.classList.remove('show')});
  document.getElementById('retryBtn').addEventListener('click',init);

  function init(){
    grid=Array.from({length:N},()=>Array(N).fill(0));
    score=0;won=false;keepPlaying=false;
    scoreEl.textContent=0;
    winOv.classList.remove('show');
    loseOv.classList.remove('show');
    board.style.gridTemplateColumns=`repeat(${N},1fr)`;
    board.style.gridTemplateRows=`repeat(${N},1fr)`;
    board.innerHTML='';
    for(let i=0;i<N*N;i++){const c=document.createElement('div');c.className='cell';board.appendChild(c)}
    spawn();spawn();
    render();
  }

  function spawn(){
    const empty=[];
    for(let r=0;r<N;r++)for(let c=0;c<N;c++)if(!grid[r][c])empty.push([r,c]);
    if(!empty.length)return;
    const[r,c]=empty[Math.random()*empty.length|0];
    grid[r][c]=Math.random()<.9?2:4;
    return[r,c];
  }

  function tileSize(){
    const gap=N>5?4:N>4?6:8,pad=gap,bw=board.clientWidth;
    return(bw-pad*2-gap*(N-1))/N;
  }

  function tilePos(r,c){
    const gap=N>5?4:N>4?6:8,pad=gap,ts=tileSize();
    return{left:pad+c*(ts+gap),top:pad+r*(ts+gap),size:ts};
  }

  function fontSize(v,sz){
    const len=String(v).length;
    if(len<=2)return sz*.5;
    if(len===3)return sz*.4;
    if(len===4)return sz*.3;
    return sz*.24;
  }

  let tiles=[];
  function render(newTiles=[],mergedTiles=[]){
    // remove old tile elements
    tiles.forEach(t=>t.el&&t.el.remove());
    tiles=[];
    for(let r=0;r<N;r++)for(let c=0;c<N;c++){
      const v=grid[r][c];
      if(!v)continue;
      const{left,top,size}=tilePos(r,c);
      const el=document.createElement('div');
      el.className='tile t'+v;
      if(newTiles.some(p=>p[0]===r&&p[1]===c))el.classList.add('new');
      if(mergedTiles.some(p=>p[0]===r&&p[1]===c))el.classList.add('merged');
      el.style.cssText=`left:${left}px;top:${top}px;width:${size}px;height:${size}px;font-size:${fontSize(v,size)}px;line-height:${size}px`;
      el.textContent=v;
      board.appendChild(el);
      tiles.push({el,r,c,v});
    }
  }

  function slide(row){
    let a=row.filter(x=>x),merged=[];
    for(let i=0;i<a.length-1;i++){
      if(a[i]===a[i+1]){
        a[i]*=2;score+=a[i];
        if(a[i]>=2048&&!won){won=true}
        merged.push(i);
        a.splice(i+1,1);
      }
    }
    while(a.length<N)a.push(0);
    return{row:a,merged};
  }

  function move(dir){
    if(moving)return;
    let changed=false,mergedCells=[];
    const prev=grid.map(r=>[...r]);

    if(dir==='left'||dir==='right'){
      for(let r=0;r<N;r++){
        let row=[...grid[r]];
        if(dir==='right')row.reverse();
        const res=slide(row);
        if(dir==='right'){res.row.reverse();res.merged=res.merged.map(i=>N-1-i)}
        grid[r]=res.row;
        res.merged.forEach(c=>mergedCells.push([r,c]));
      }
    } else {
      for(let c=0;c<N;c++){
        let col=[];for(let r=0;r<N;r++)col.push(grid[r][c]);
        if(dir==='down')col.reverse();
        const res=slide(col);
        if(dir==='down'){res.row.reverse();res.merged=res.merged.map(i=>N-1-i)}
        for(let r=0;r<N;r++)grid[r][c]=res.row[r];
        res.merged.forEach(r=>mergedCells.push([r,c]));
      }
    }

    for(let r=0;r<N;r++)for(let c=0;c<N;c++)if(grid[r][c]!==prev[r][c])changed=true;

    if(!changed)return;
    moving=true;
    scoreEl.textContent=score;
    if(score>best){best=score;bestEl.textContent=best;localStorage.setItem('2048best',best)}

    // spawn particles on merges
    mergedCells.forEach(([r,c])=>spawnParticles(r,c,grid[r][c]));

    const sp=spawn();
    const newTiles=sp?[sp]:[];
    render(newTiles,mergedCells);

    setTimeout(()=>{
      moving=false;
      if(won&&!keepPlaying)winOv.classList.add('show');
      else if(isLost())loseOv.classList.add('show');
    },160);
  }

  function isLost(){
    for(let r=0;r<N;r++)for(let c=0;c<N;c++){
      if(!grid[r][c])return false;
      if(c<N-1&&grid[r][c]===grid[r][c+1])return false;
      if(r<N-1&&grid[r][c]===grid[r+1][c])return false;
    }
    return true;
  }

  // particles
  function spawnParticles(r,c,val){
    const{left,top,size}=tilePos(r,c);
    const cx=left+size/2,cy=top+size/2;
    const colors={'2':'#aab','4':'#bbf','8':'#c5703a','16':'#d4613a','32':'#e04848','64':'#e83030',
      '128':'#e8c84a','256':'#e8c230','512':'#e8be18','1024':'#7c3aed','2048':'#ec4899',
      '4096':'#06b6d4','8192':'#10b981','16384':'#f59e0b','32768':'#ef4444'};
    const color=colors[val]||'#fff';
    for(let i=0;i<8;i++){
      const p=document.createElement('div');
      const angle=Math.random()*Math.PI*2,dist=30+Math.random()*40,sz=3+Math.random()*4;
      p.style.cssText=`position:absolute;left:${cx}px;top:${cy}px;width:${sz}px;height:${sz}px;border-radius:50%;background:${color};opacity:1;transition:all .5s ease-out;pointer-events:none;z-index:5`;
      particlesEl.appendChild(p);
      requestAnimationFrame(()=>{
        p.style.left=cx+Math.cos(angle)*dist+'px';
        p.style.top=cy+Math.sin(angle)*dist+'px';
        p.style.opacity='0';
        p.style.transform='scale(0)';
      });
      setTimeout(()=>p.remove(),550);
    }
  }

  // keyboard
  document.addEventListener('keydown',e=>{
    const map={ArrowLeft:'left',ArrowRight:'right',ArrowUp:'up',ArrowDown:'down',
               a:'left',d:'right',w:'up',s:'down'};
    if(map[e.key]){e.preventDefault();move(map[e.key])}
  });

  // swipe (touch + mouse)
  let sx,sy,swiping=false,isTouch=false;

  boardWrap.addEventListener('touchstart',e=>{isTouch=true;const t=e.touches[0];sx=t.clientX;sy=t.clientY;swiping=true},{passive:true});
  boardWrap.addEventListener('touchend',e=>{if(!swiping)return;swiping=false;const t=e.changedTouches[0];handleSwipe(t.clientX-sx,t.clientY-sy)},{passive:true});

  boardWrap.addEventListener('mousedown',e=>{if(isTouch){isTouch=false;return}sx=e.clientX;sy=e.clientY;swiping=true;e.preventDefault()});
  document.addEventListener('mouseup',e=>{if(!swiping)return;swiping=false;handleSwipe(e.clientX-sx,e.clientY-sy)});

  function handleSwipe(dx,dy){
    const min=30;
    if(Math.abs(dx)<min&&Math.abs(dy)<min)return;
    if(Math.abs(dx)>Math.abs(dy))move(dx>0?'right':'left');
    else move(dy>0?'down':'up');
  }

  // ambient floating particles
  function ambientParticle(){
    const p=document.createElement('div');
    const sz=2+Math.random()*3,x=Math.random()*100;
    const colors=['#ff6b6b','#feca57','#48dbfb','#ff9ff3','#7c3aed'];
    p.style.cssText=`position:fixed;bottom:-10px;left:${x}%;width:${sz}px;height:${sz}px;border-radius:50%;background:${colors[Math.random()*5|0]};opacity:0;pointer-events:none;z-index:0;transition:all ${4+Math.random()*4}s linear`;
    document.body.appendChild(p);
    requestAnimationFrame(()=>{p.style.bottom='110%';p.style.opacity='.15';p.style.left=x+(-10+Math.random()*20)+'%'});
    setTimeout(()=>p.remove(),8500);
  }
  setInterval(ambientParticle,800);

  // resize handler
  window.addEventListener('resize',()=>render());

  init();
})();
</script>
</body>
</html>