@import"https://fonts.googleapis.com/css2?family=Roboto+Mono:wght@300;400;700&display=swap";:root{--gap: 10px;--board-size: min(488px, calc(100vw - 32px) );--tile-size: calc((var(--board-size) - 5 * var(--gap)) / 4);--radius: 8px;--shadow: 0 4px 24px rgba(0, 0, 0, .4);--bg: #2B2838;--board: #3A3848;--tile-empty: #504E5E;--text-primary: #FFFFFF;--text-secondary: #9896A8;--tile-2: #F4A07A;--tile-4: #F0D060;--tile-8: #80DC60;--tile-16: #50D8C0;--tile-32: #A0A0E8;--tile-64: #C080D0;--tile-128: #F060A0;--tile-256: #E03080;--tile-512: #E05030;--tile-1024: #4090E0;--tile-2048: #30D830;--tile-text-2: #111111;--tile-text-4: #111111;--tile-text-8: #111111;--tile-text-16: #111111;--tile-text-32: #111111;--tile-text-64: #111111;--tile-text-128: #111111;--tile-text-256: #FFFFFF;--tile-text-512: #FFFFFF;--tile-text-1024: #FFFFFF;--tile-text-2048: #111111;--font: "Roboto Mono", monospace;--weight-light: 300;--weight-regular: 400;--weight-bold: 700}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;min-height:100%}html{overflow-x:hidden}body{background:var(--bg);color:var(--text-primary);font-family:var(--font);font-weight:var(--weight-regular);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden;min-height:100vh;min-height:100dvh}#root{min-height:100vh;min-height:100dvh}.container{width:min(520px,100%);max-width:100%;margin:0 auto;padding:0 16px;box-sizing:border-box}.header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;padding:24px 0 16px}.header__title{margin:0;font-size:3rem;font-weight:var(--weight-bold);color:var(--text-primary);line-height:1}.header__actions{display:flex;gap:8px}.btn{background:var(--board);color:var(--text-primary);font-family:var(--font);font-weight:var(--weight-regular);font-size:.95rem;border:none;border-radius:var(--radius);padding:8px 16px;cursor:pointer;transition:opacity .12s ease,transform .12s ease}.btn:hover{opacity:.85}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.4;cursor:not-allowed}.btn--primary{background:var(--tile-2048);color:var(--tile-text-2048);font-weight:var(--weight-bold)}.btn:focus-visible,[role=gridcell]:focus-visible{outline:2px solid var(--text-primary);outline-offset:2px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:16px}.stat-card{background:var(--board);border-radius:var(--radius);padding:10px 8px;text-align:center;display:flex;flex-direction:column;gap:4px}.stat-card__caption{font-size:.7rem;font-weight:var(--weight-light);color:var(--text-secondary);letter-spacing:.08em;text-transform:uppercase}.stat-card__value{font-size:1.25rem;font-weight:var(--weight-bold);color:var(--text-primary)}.board-wrapper{position:relative;width:var(--board-size);height:var(--board-size);max-width:100%;margin:0 auto;overflow:hidden}.board{width:var(--board-size);height:var(--board-size);max-width:100%;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(4,1fr);gap:var(--gap);padding:var(--gap);background:var(--board);border-radius:var(--radius);box-shadow:var(--shadow)}.cell{background:var(--tile-empty);border-radius:var(--radius)}.tile-layer{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.tile{position:absolute;display:flex;align-items:center;justify-content:center;border-radius:var(--radius);font-family:var(--font);font-weight:var(--weight-bold);font-size:clamp(1rem,calc(var(--tile-size) * .3),2.5rem);width:var(--tile-size);height:var(--tile-size);top:calc(var(--gap) + 0 * (var(--tile-size) + var(--gap)));left:calc(var(--gap) + 0 * (var(--tile-size) + var(--gap)));transition:top .18s ease,left .18s ease;will-change:top,left}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;background:#2b2838d9;border-radius:var(--radius);z-index:10;text-align:center;padding:24px}.overlay__heading{margin:0;font-size:2.25rem;font-weight:var(--weight-bold);color:var(--text-primary)}.overlay__body{margin:0;font-size:1rem;font-weight:var(--weight-regular);color:var(--text-secondary)}.overlay__actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}@keyframes popIn{0%{transform:scale(0);opacity:0}80%{transform:scale(1.1)}to{transform:scale(1);opacity:1}}.tile--new{animation:popIn .18s ease forwards}@keyframes mergeFlash{0%{transform:scale(1)}50%{transform:scale(1.15)}to{transform:scale(1)}}.tile--merged{animation:mergeFlash .18s ease forwards}@media (prefers-reduced-motion: reduce){.tile{transition:none}.tile--new,.tile--merged{animation:none}}.hint{margin:16px 0 24px;text-align:center;font-size:.8rem;font-weight:var(--weight-light);color:var(--text-secondary)}