:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh;background:#0a0a0a;color:#fafafa}.game-container{position:relative;width:100vw;height:100vh;overflow:hidden;cursor:crosshair}canvas{display:block;width:100%;height:100%}.hud{position:absolute;top:0;left:0;right:0;display:flex;justify-content:space-between;align-items:flex-start;padding:12px 16px;pointer-events:none;z-index:10}.hud-left,.hud-right{display:flex;flex-direction:column;gap:6px}.hud-stat{font-size:14px;font-weight:600;color:#fff;text-shadow:0 1px 4px rgba(0,0,0,.8);letter-spacing:.02em}.hud-stat .label{opacity:.6;font-weight:400;margin-right:4px}.hud-stat .value{font-variant-numeric:tabular-nums}.wave-announce{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:48px;font-weight:800;color:#fff;text-shadow:0 2px 12px rgba(0,0,0,.9);pointer-events:none;z-index:20;animation:wavePop 1.5s ease-out forwards}@keyframes wavePop{0%{opacity:0;transform:translate(-50%,-50%) scale(.5)}20%{opacity:1;transform:translate(-50%,-50%) scale(1.1)}40%{transform:translate(-50%,-50%) scale(1)}to{opacity:0;transform:translate(-50%,-60%) scale(1)}}.upgrade-panel{position:absolute;bottom:12px;left:50%;transform:translate(-50%);display:flex;gap:8px;z-index:15;pointer-events:auto}.upgrade-btn{background:#141414d9;border:1px solid rgba(255,255,255,.15);color:#fff;padding:8px 14px;border-radius:8px;font-size:12px;font-weight:600;cursor:pointer;transition:all .15s;text-align:center;min-width:100px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.upgrade-btn:hover:not(:disabled){background:#282828e6;border-color:#ffffff4d;transform:translateY(-1px)}.upgrade-btn:disabled{opacity:.4;cursor:not-allowed}.upgrade-btn .cost{display:block;color:#f5c842;font-size:11px;margin-top:2px}.upgrade-btn .level{display:block;color:#ffffff80;font-size:10px}.game-over-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#000000bf;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:30;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.game-over-overlay h1{font-size:56px;margin:0 0 8px;color:#ff6b6b}.game-over-overlay .subtitle{font-size:18px;color:#ffffffb3;margin-bottom:24px}.restart-btn{background:#6b5ce7;border:none;color:#fff;padding:12px 32px;border-radius:8px;font-size:16px;font-weight:700;cursor:pointer;transition:background .15s}.restart-btn:hover{background:#7b6cf7}.start-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#000000b3;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:30;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.start-overlay h1{font-size:48px;margin:0 0 4px;color:#9b7ff5}.start-overlay .tagline{font-size:16px;color:#fff9;margin-bottom:32px}.start-overlay .start-btn{background:#6b5ce7;border:none;color:#fff;padding:14px 40px;border-radius:8px;font-size:18px;font-weight:700;cursor:pointer;transition:background .15s}.start-overlay .start-btn:hover{background:#7b6cf7}.start-overlay .instructions{margin-top:24px;font-size:13px;color:#ffffff80;text-align:center;line-height:1.8}