:root{--primary:#C1FF00;--bg-dark:#050505;--text:#ffffff;--panel:#121212;--panel-border:#2a2a2a}*{box-sizing:border-box}body{background:radial-gradient(circle at 20% 20%,#171717 0,var(--bg-dark) 55%);color:var(--text);font-family:'Courier New',monospace;margin:0;min-height:100vh;touch-action:manipulation}.back-btn{position:fixed;top:16px;left:16px;color:var(--primary);text-decoration:none;font-size:.85rem;z-index:100}.game-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:76px 16px 24px}.screen{width:min(620px,100%)}.hidden{display:none}.card{border:3px solid #0c0c0c;background:rgba(255,255,255,.94);border-radius:16px;box-shadow:0 16px 0 #0c0c0c;color:#0c0c0c;padding:24px;text-align:center}.card h1,.card h2{margin:0 0 12px;color:var(--primary);text-transform:uppercase;text-shadow:2px 2px #0c0c0c}.card p{font-weight:700;margin:0 0 16px}button{background:#c1ff00;color:#0c0c0c;border:3px solid #0c0c0c;font-weight:700;cursor:pointer;padding:12px 24px;font-size:1rem;border-radius:8px;font-family:inherit;box-shadow:4px 4px 0 #0c0c0c;text-transform:uppercase}button:active{transform:translate(4px,4px);box-shadow:none}.hud{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-bottom:12px;padding:14px;align-items:center}.card-lite{border:2px solid var(--panel-border);border-radius:12px;background:#101010}.hud div{font-size:.95rem}.hud span{color:var(--primary);font-weight:700}#newGameButton{padding:8px 10px;font-size:.8rem}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;background:#1a1a1a;border-radius:8px;padding:8px;touch-action:none;position:relative}.board-wrap{position:relative}.cell{aspect-ratio:1;border-radius:6px;background:#101010;border:1px solid #2a2a2a;position:relative}.tile{position:absolute;inset:0;border-radius:6px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:clamp(.7rem, 3vw, 1.1rem);transition:transform .1s ease-out;will-change:transform}.tile.slide-left{transform:translateX(-10px)}.tile.slide-right{transform:translateX(10px)}.tile.slide-up{transform:translateY(-10px)}.tile.slide-down{transform:translateY(10px)}.tile.new{animation:120ms ease-out pop-in}.tile.merge{animation:120ms ease-out merge-pop}@keyframes pop-in{0%{transform:scale(.7);opacity:.6}100%{transform:scale(1);opacity:1}}@keyframes merge-pop{0%,100%{transform:scale(1)}50%{transform:scale(1.1)}}.tile-dark{background:#2a2a2a;color:#f8f8f8}.tile-green-1{background:#1a3a1a;color:#e8ffe0}.tile-green-2{background:#2d5a2d;color:#eaffde}.tile-gold-1{background:#5a4a00;color:#fff6bf}.tile-gold-2{background:#8a7000;color:#fff6bf}.tile-purple-1{background:#3a1a5a;color:#f1d8ff}.tile-purple-2{background:#6a3a9a;color:#f1d8ff}.tile-orange-1{background:#5a2a00;color:#ffe6d1}.tile-orange-2{background:#9a5a00;color:#fff0dd}.tile-unicorn{background:#c1ff00;color:#0c0c0c}.overlay{position:absolute;inset:8px;margin:0;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:5}.overlay.hidden{display:none}.overlay-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.result-line{font-size:1.1rem}@media (max-width:600px){.game-shell{align-items:flex-start;padding-top:64px}.screen{width:min(420px,100%)}.hud{grid-template-columns:repeat(2,minmax(0,1fr))}#newGameButton{grid-column:span 2}}