*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:linear-gradient(135deg,#0c1929,#1a3a5c);color:#e4e4e7;min-height:100vh;line-height:1.6}.container{max-width:700px;margin:0 auto;padding:2rem 1.5rem}header{text-align:center;margin-bottom:1.5rem}.back{display:inline-block;color:#60a5fa;text-decoration:none;margin-bottom:1rem;font-size:.9rem}.back:hover{text-decoration:underline}h1{font-size:2rem;margin-bottom:.5rem;color:#fff}.subtitle{color:#94a3b8;font-size:1rem}.game-container{position:relative;display:flex;justify-content:center;align-items:center;background:#0a1628;border-radius:12px;border:2px solid #1e3a5f;overflow:hidden}canvas{display:block;background:linear-gradient(180deg,#0a1628,#0d2847)}.overlay{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:center;background:#0a1628f2;text-align:center;padding:2rem}.overlay.hidden{display:none}.overlay h2{font-size:2rem;margin-bottom:.5rem;color:#fff}.overlay p{color:#94a3b8;margin-bottom:.5rem}.controls-info{margin:1.5rem 0;padding:1rem;background:#ffffff0d;border-radius:8px}.controls-info p{margin:.25rem 0;font-size:.9rem}.play-btn{margin-top:1rem;padding:1rem 2.5rem;font-size:1.1rem;font-weight:600;background:linear-gradient(135deg,#22c55e,#16a34a);color:#fff;border:none;border-radius:8px;cursor:pointer;transition:transform .15s,box-shadow .15s}.play-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #22c55e66}.hud{position:absolute;top:0;left:0;right:0;display:flex;justify-content:space-between;padding:.75rem 1rem;background:linear-gradient(180deg,rgba(0,0,0,.6) 0%,transparent 100%)}.hud.hidden{display:none}.hud-item{display:flex;flex-direction:column;align-items:center}.hud-label{font-size:.7rem;color:#94a3b8;text-transform:uppercase;letter-spacing:.05em}.hud-value{font-size:1.25rem;font-weight:700;color:#fff}.health-bar{width:100px;height:12px;background:#fff3;border-radius:6px;overflow:hidden;margin-top:.25rem}.health-fill{height:100%;width:100%;background:linear-gradient(90deg,#ef4444,#22c55e 50% 100%);transition:width .3s}footer{text-align:center;margin-top:2rem;padding-top:1.5rem;border-top:1px solid rgba(255,255,255,.1);color:#64748b;font-size:.875rem}footer a{color:#60a5fa;text-decoration:none}footer a:hover{text-decoration:underline}@media(max-width:650px){canvas{width:100%;height:auto}}