*{margin:0;padding:0;box-sizing:border-box}body{font-family:Courier New,monospace;background:#0a0a0a;display:flex;justify-content:center;align-items:center;min-height:100vh;overflow:hidden}#gameCanvas{display:block;width:100%;height:100%;background:#111;border:2px solid #333;outline:none;cursor:pointer}#gameCanvas:focus{border-color:#0f8}#ui-layer{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none}#score-display{position:absolute;top:20px;left:20px;color:#0f8;font-size:24px;font-weight:700;text-shadow:0 0 10px rgba(0,255,136,.5);opacity:0;transform:translateY(-10px);transition:opacity .3s ease,transform .3s ease}#score-display.visible{opacity:1;transform:translateY(0)}#score-display .label{font-size:12px;opacity:.7;display:block;margin-bottom:4px}#score-display.flash{animation:scoreFlash .2s ease-out}@keyframes scoreFlash{0%{transform:scale(1);color:#0f8}50%{transform:scale(1.3);color:#ff0}to{transform:scale(1);color:#0f8}}#lives-display{position:absolute;top:20px;right:20px;color:#0f8;font-size:24px;font-weight:700;text-shadow:0 0 10px rgba(0,255,136,.5)}#lives-display .label{font-size:12px;opacity:.7;display:block;margin-bottom:4px}#ui-layer>div{transition:opacity .3s ease,transform .3s ease}#title-screen{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:#fff;pointer-events:none;opacity:0;transition:opacity .3s ease,transform .3s ease}#title-screen.visible{opacity:1}#title-screen.fade-out{opacity:0;transform:translate(-50%,-50%) scale(.95)}#title-screen h1{font-size:48px;margin-bottom:8px;color:#0f8;text-shadow:0 0 20px rgba(0,255,136,.5);letter-spacing:4px}#title-screen .subtitle{font-size:16px;margin-bottom:16px;opacity:.7}#title-screen .instructions{font-size:14px;opacity:.8;animation:pulse 2s ease-in-out infinite;color:#0f8;margin-bottom:24px}#title-high-score{margin-top:24px;font-size:18px;color:#fc0;text-shadow:0 0 10px rgba(255,204,0,.4)}#title-high-score .label{font-size:12px;opacity:.7;display:block;margin-bottom:4px;color:#fff}#difficulty-selector{margin-top:32px;display:flex;gap:12px;justify-content:center;pointer-events:auto;flex-wrap:wrap}.difficulty-btn{background:#0009;color:#ccc;border:1px solid #444;padding:10px 18px;font-family:Courier New,monospace;font-size:14px;cursor:pointer;transition:all .2s;text-transform:uppercase;letter-spacing:1px;border-radius:4px;display:flex;align-items:center;gap:6px}.difficulty-btn:hover{background:#000000d9;border-color:#666;color:#fff;transform:translateY(-2px)}.difficulty-btn.active{background:#0f83;border-color:#0f8;color:#0f8;font-weight:700;box-shadow:0 0 15px #00ff884d}.difficulty-btn:active{transform:translateY(0)}.lock-icon{font-size:12px;opacity:.7}.difficulty-btn.locked{opacity:.5;cursor:not-allowed}#warp-btn .lock-icon{display:inline-block}#warp-btn.unlocked .lock-icon{display:none}#game-over{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:#fff;background:#000000e6;padding:40px;border:2px solid #ff4444;pointer-events:auto;opacity:0;transition:opacity .3s ease,transform .3s ease}#game-over.visible{opacity:1}#game-over.fade-out{opacity:0;transform:translate(-50%,-50%) scale(.95)}#game-over h2{font-size:36px;margin-bottom:24px;color:#f44;text-shadow:0 0 10px rgba(255,68,68,.5)}.score-summary{margin-bottom:24px}.score-row{display:flex;justify-content:space-between;gap:40px;margin:8px 0;font-size:20px}.score-row .label{opacity:.7}#retry-button{background:#0f8;color:#000;border:none;padding:12px 32px;font-size:18px;font-family:Courier New,monospace;font-weight:700;cursor:pointer;transition:all .2s;text-transform:uppercase;letter-spacing:2px}#retry-button:hover{background:#00cc6a;transform:scale(1.05);box-shadow:0 0 20px #00ff8880}#retry-button:active{transform:scale(.98)}#mute-btn{position:absolute;top:12px;right:12px;background:#0009;color:#fff;border:1px solid #444;border-radius:4px;padding:5px 9px;font-size:18px;cursor:pointer;z-index:100;line-height:1;transition:background .15s,border-color .15s}#mute-btn:hover{background:#000000d9;border-color:#666}#attract-banner{position:absolute;top:0;left:0;right:0;text-align:center;padding:8px;background:#ffc80026;color:#fc0;font-size:13px;letter-spacing:1px;pointer-events:none}.hidden{display:none!important}@keyframes pulse{0%,to{opacity:.5}50%{opacity:.8}}@keyframes shake{0%,to{transform:translate(0)}10%,30%,50%,70%,90%{transform:translate(-8px)}20%,40%,60%,80%{transform:translate(8px)}}.shake{animation:shake .5s ease-in-out}#game-container{position:relative;width:800px;height:600px;max-width:100vw;max-height:100vh}#game-container.shake{animation:shake .5s ease-in-out}