*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden;background:#1a1a2e;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;touch-action:none;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}#game-container{width:100%;height:100%;position:fixed;top:0;left:0}#game-container canvas{width:100%!important;height:100%!important;display:block}#ui-overlay{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:100}#score{position:absolute;top:20px;left:20px;color:#fff;font-size:24px;font-weight:700;text-shadow:2px 2px 4px rgba(0,0,0,.5);display:none}#start-screen{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:#fff;pointer-events:auto}#start-screen h1{font-size:48px;margin-bottom:20px;text-shadow:3px 3px 6px rgba(0,0,0,.5)}#start-screen p{font-size:24px;opacity:.8;animation:pulse 1.5s ease-in-out infinite}@keyframes pulse{0%,to{opacity:.5}50%{opacity:1}}#game-over-screen{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:#fff;display:none;pointer-events:auto}#game-over-screen h1{font-size:48px;margin-bottom:10px;color:#ff6b6b}#game-over-screen .final-score{font-size:32px;margin-bottom:20px}#game-over-screen p{font-size:20px;opacity:.8}#intro-screen{position:absolute;bottom:30px;left:50%;transform:translate(-50%);text-align:center;pointer-events:auto;width:90%;max-width:500px}#intro-text{background:#000000b3;color:#fff;padding:20px 30px;border-radius:15px;font-size:20px;line-height:1.5;min-height:80px;display:flex;align-items:center;justify-content:center}#skip-intro{margin-top:15px;padding:10px 30px;font-size:18px;background:#fff3;color:#fff;border:2px solid white;border-radius:25px;cursor:pointer;transition:all .2s}#skip-intro:hover,#skip-intro:active{background:#fff6}#speed-buttons{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;max-width:400px;margin:15px auto}.speed-btn{padding:10px 20px;font-size:16px;background:#fff3;color:#fff;border:2px solid white;border-radius:20px;cursor:pointer;transition:all .2s}.speed-btn:hover,.speed-btn:active{background:#ffffff4d}.speed-btn.selected{background:#ffa50099;border-color:orange}