:root{font-family:Courier New,Courier,monospace;line-height:1.5;font-weight:400;color-scheme:light dark;color:#333;background-color:#f0f0f0}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;justify-content:center;overflow:hidden}#game-container{position:relative;width:800px;height:400px;max-width:100vw;max-height:calc(100vh - 40px);background-color:#fff;box-shadow:0 4px 6px #0000001a;overflow:hidden;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}canvas{display:block;width:100%;height:100%;touch-action:none}#ui-layer{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none}#score{position:absolute;top:10px;right:20px;font-size:24px;font-weight:700;color:#535353}#sound-toggle-btn{position:absolute;top:10px;left:20px;background:#ffffffe6;border:2px solid #333;border-radius:50%;width:40px;height:40px;font-size:20px;cursor:pointer;pointer-events:auto;transition:all .2s;display:flex;align-items:center;justify-content:center;z-index:100}#sound-toggle-btn:hover{background:#fff;transform:scale(1.1)}#sound-toggle-btn:active{transform:scale(.95)}.screen{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;background-color:#fffc;transition:opacity .3s}.screen.hidden{opacity:0;pointer-events:none}.screen.active{opacity:1;pointer-events:auto}h1{font-size:2.5em;margin-bottom:.2em;color:#333;margin-top:.2em}p{font-size:1.2em;color:#666;animation:blink 1s infinite;margin:.3em 0}.level-selector{margin-top:10px;text-align:center}.level-selector h3{margin:5px 0;font-size:1em;color:#555;text-transform:uppercase;letter-spacing:1px}.level-buttons{display:flex;gap:10px;justify-content:center;margin-top:5px}.level-btn{padding:6px 12px;background:#4ecdc4;color:#fff;border:2px solid white;border-radius:20px;cursor:pointer;font-family:inherit;font-size:.9em;opacity:.7;transition:all .2s}.level-btn.active{opacity:1;transform:scale(1.05);background:#ff6b6b;box-shadow:0 4px 8px #0003}.level-btn:hover:not(.active){opacity:.9}@media(max-width:768px){h1{font-size:2em;margin:.2em 0}p{font-size:1em}}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}#achievement-container{position:absolute;top:20px;right:20px;display:flex;flex-direction:column;gap:10px;pointer-events:none;z-index:1000}.achievement-toast{display:flex;align-items:center;background:#000c;color:#fff;padding:15px;border-radius:8px;box-shadow:0 4px 6px #0000001a;transform:translate(120%);transition:transform .5s cubic-bezier(.68,-.55,.27,1.55);width:300px;border-left:5px solid #ffd700}.achievement-toast.show{transform:translate(0)}.achievement-icon{font-size:24px;margin-right:15px}.achievement-text{display:flex;flex-direction:column}.achievement-title{font-weight:700;font-size:16px;color:gold}.achievement-desc{font-size:12px;color:#ddd}#high-score-input-screen{padding:20px;box-sizing:border-box;overflow-y:auto}#high-score-input-screen input{background:transparent;border:2px solid #333;color:#333;font-family:Courier New,Courier,monospace;font-size:48px;text-align:center;width:150px;margin:20px 0;text-transform:uppercase}#high-score-input-screen button{background:#333;color:#fff;border:none;padding:15px 30px;font-family:Courier New,Courier,monospace;font-size:24px;cursor:pointer;margin-bottom:20px;pointer-events:auto}#high-score-input-screen button:hover{background:#555}#high-score-input-screen button:active{background:#666}@media(max-width:768px){#high-score-input-screen{padding:10px}#high-score-input-screen h1{font-size:2em;margin:10px 0}#high-score-input-screen p{font-size:1.2em;margin:10px 0}#high-score-input-screen input{font-size:36px;width:120px;margin:15px 0}#high-score-input-screen button{font-size:20px;padding:12px 24px;margin-bottom:15px}}#leaderboard-screen{padding:20px;box-sizing:border-box;overflow-y:auto}#leaderboard-table{width:60%;margin-bottom:20px;border-collapse:collapse}#leaderboard-table th,#leaderboard-table td{text-align:center;padding:10px;font-size:20px;border-bottom:1px solid #ccc}#leaderboard-table th{font-weight:700;border-bottom:2px solid #333}@media(max-width:768px){#leaderboard-screen{padding:10px}#leaderboard-screen h1{font-size:2em;margin:10px 0}#leaderboard-screen p{font-size:1.2em;margin:10px 0}#leaderboard-table{width:90%}#leaderboard-table th,#leaderboard-table td{padding:8px 4px;font-size:16px}}#start-screen,#game-over-screen{padding:20px;box-sizing:border-box}.controls-hint{margin:10px 0;font-size:13px;color:#666;line-height:1.6;opacity:.8}.controls-hint div{animation:none}@media(max-width:768px){#start-screen{padding:15px}.controls-hint{font-size:12px;margin:15px 0;line-height:1.6}#manage-achievements-btn{font-size:14px;padding:8px 16px}}@media(max-width:600px){.controls-hint{font-size:12px;line-height:1.5}}#manage-achievements-btn{margin-top:10px;padding:8px 16px;font-size:14px;cursor:pointer;background:#fff;border:2px solid #333;font-family:Courier New,Courier,monospace;color:#333}#manage-achievements-btn:hover{background:#f0f0f0}#achievement-dashboard{background:#fffffff2;z-index:2000}#achievement-list{display:flex;flex-direction:column;gap:10px;max-height:300px;overflow-y:auto;margin-bottom:20px;width:80%}.achievement-item{display:flex;justify-content:space-between;align-items:center;padding:10px;border:1px solid #ccc;background:#fff}.achievement-item input{width:60px;padding:5px;font-family:Courier New,Courier,monospace}#close-dashboard-btn{padding:10px 20px;font-size:16px;cursor:pointer;background:#333;color:#fff;border:none;font-family:Courier New,Courier,monospace}#pause-screen{background:#00000080;color:#fff;z-index:3000}#pause-screen h1{color:#fff;font-size:4em;letter-spacing:5px}