:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}body{margin:0}#root{text-align:center;border-inline:1px solid var(--border);box-sizing:border-box;flex-direction:column;width:1126px;max-width:100%;min-height:100svh;margin:0 auto;display:flex}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}*{box-sizing:border-box}body{overscroll-behavior:none;touch-action:pan-x pan-y;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);justify-content:center;align-items:center;min-height:100vh;margin:0;padding:20px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;display:flex}.app{text-align:center}.header{justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px;display:flex}.title{color:#fff;text-shadow:2px 2px 4px #0000004d;margin:0;font-size:3rem}.scores{gap:10px;display:flex}.score-box{color:#fff;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fff3;border-radius:8px;padding:10px 20px}.score-label{text-transform:uppercase;letter-spacing:1px;font-size:.75rem}.score-value{font-size:1.5rem;font-weight:700}.controls{justify-content:center;gap:10px;margin-bottom:20px;display:flex}button{cursor:pointer;border:none;border-radius:8px;padding:12px 24px;font-size:1rem;font-weight:700;transition:all .2s}.new-game{color:#fff;background:#8f7a66}.new-game:hover{background:#9f8a76;transform:translateY(-2px)}.game-board{touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;background:#bbada0;border-radius:8px;grid-template-columns:repeat(4,1fr);gap:10px;width:340px;margin:0 auto;padding:10px;display:grid}.cell{background:#eee4da59;border-radius:6px;justify-content:center;align-items:center;width:75px;height:75px;font-size:2rem;font-weight:700;transition:all .15s ease-in-out;display:flex}.cell-0{background:#eee4da59}.cell-2{color:#776e65;background:#eee4da}.cell-4{color:#776e65;background:#ede0c8}.cell-8{color:#f9f6f2;background:#f2b179}.cell-16{color:#f9f6f2;background:#f59563}.cell-32{color:#f9f6f2;background:#f67c5f}.cell-64{color:#f9f6f2;background:#f65e3b}.cell-128{color:#f9f6f2;background:#edcf72;font-size:1.75rem}.cell-256{color:#f9f6f2;background:#edcc61;font-size:1.75rem}.cell-512{color:#f9f6f2;background:#edc850;font-size:1.75rem}.cell-1024{color:#f9f6f2;background:#edc53f;font-size:1.5rem}.cell-2048{color:#f9f6f2;background:#edc22e;font-size:1.5rem}.cell-super{color:#f9f6f2;background:#3c3a32;font-size:1.25rem}.game-over-overlay{z-index:1000;background:#000000b3;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.game-over-content{text-align:center;background:#fff;border-radius:12px;padding:40px 60px}.game-over-content h2{color:#776e65;margin:0 0 20px}.instructions{color:#fff;opacity:.8;margin-top:20px;font-size:.9rem}