*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--board-bg: #bbada0;--cell-bg: #cdc1b4;--bg: #faf8ef;--accent: #f67c5f;--text: #776e65;--text-light: #f9f6f2;--font-num: "Poppins", "Helvetica Neue", sans-serif}body{background:var(--bg);font-family:var(--font-num);min-height:100vh;display:flex;justify-content:center;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}.app{width:100%;max-width:420px;padding:16px;display:flex;flex-direction:column;align-items:center;gap:16px}.header{width:100%;display:flex;justify-content:space-between;align-items:flex-start}.logo{font-size:3rem;font-weight:800;color:var(--text);letter-spacing:-2px;line-height:1}.tagline{font-size:.75rem;color:#a09185;margin-top:4px}.scores{display:flex;gap:8px}.score-box{background:var(--board-bg);border-radius:6px;padding:8px 16px;text-align:center;min-width:70px}.score-label{display:block;font-size:.65rem;color:#eee4da;text-transform:uppercase;letter-spacing:.05em;font-weight:600}.score-value{display:block;font-size:1.25rem;font-weight:700;color:var(--text-light);font-family:var(--font-num)}.score-value.best{color:#f67c5f}.board-container{position:relative;outline:none;touch-action:none;cursor:pointer}.board-bg{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:10px;border-radius:8px;width:350px;height:350px}.cell-bg{width:75px;height:75px;border-radius:6px}.tiles-layer{position:absolute;top:10px;left:10px;right:10px;bottom:10px}.tile{position:absolute;width:75px;height:75px;border-radius:6px;display:flex;align-items:center;justify-content:center;font-weight:700;font-family:var(--font-num);transform:translate(calc(var(--x) * 85px),calc(var(--y) * 85px));transition:transform .12s ease-out;z-index:1}.tile-merged{animation:pop .15s ease-out;z-index:2}.tile-new{animation:spawn .1s ease-out}.controls{display:flex;gap:8px;width:100%}.btn{flex:1;padding:10px;border:none;border-radius:6px;background:#8f7a66;color:var(--text-light);font-size:.85rem;font-weight:600;cursor:pointer;transition:background .2s,transform .1s;font-family:var(--font-num)}.btn:hover:not(:disabled){background:#9f8b77}.btn:active:not(:disabled){transform:scale(.97)}.btn:disabled{opacity:.4;cursor:not-allowed}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:100;animation:fadeIn .3s ease}.modal{background:#fff;border-radius:16px;padding:32px 40px;text-align:center;max-width:320px;width:90%;box-shadow:0 20px 60px #0000004d;animation:slideUp .3s ease}.modal h2{font-size:2rem;color:var(--text);margin-bottom:12px}.final-score{font-size:1.5rem;color:var(--text);margin-bottom:4px}.best-score{font-size:.9rem;color:#a09185;margin-bottom:20px}.modal-btns{display:flex;flex-direction:column;gap:8px}.modal-btn{padding:12px;border:none;border-radius:8px;cursor:pointer;font-size:.95rem;font-weight:600;font-family:var(--font-num);transition:all .2s}.modal-btn.primary{background:var(--accent);color:#fff}.modal-btn.primary:hover{background:#e06040}.modal-btn.secondary{background:#f0e6d3;color:var(--text)}.modal-btn.secondary:hover{background:#e8dcc8}.hint{font-size:.75rem;color:#a09185;text-align:center}@keyframes pop{0%{transform:translate(calc(var(--x) * 85px),calc(var(--y) * 85px)) scale(1)}50%{transform:translate(calc(var(--x) * 85px),calc(var(--y) * 85px)) scale(1.15)}to{transform:translate(calc(var(--x) * 85px),calc(var(--y) * 85px)) scale(1)}}@keyframes spawn{0%{transform:translate(calc(var(--x) * 85px),calc(var(--y) * 85px)) scale(0)}to{transform:translate(calc(var(--x) * 85px),calc(var(--y) * 85px)) scale(1)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media(max-width:420px){.board-bg{width:320px;height:320px;gap:8px;padding:8px}.cell-bg,.tile{width:70px;height:70px}.tile{transform:translate(calc(var(--x) * 78px),calc(var(--y) * 78px))}.logo{font-size:2.5rem}}