: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;margin:0;padding:0}html,body,#root{width:100%;height:100%;overflow:hidden;background:#0a0a0a;color:#fafafa}.game-container{width:100vw;height:100vh;position:relative;overflow:hidden;cursor:none}.game-canvas{display:block;width:100%;height:100%}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;background:#000000d9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:10;cursor:default;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.menu{text-align:center;padding:3rem 4rem;border:1px solid rgba(255,255,255,.08);border-radius:1rem;background:#ffffff08;max-width:420px}.title{display:flex;flex-direction:column;gap:0;line-height:1;margin-bottom:.5rem}.title-zombie{font-size:3.5rem;font-weight:900;letter-spacing:.15em;color:#4c4;text-shadow:0 0 30px rgba(68,204,68,.4),0 0 60px rgba(68,204,68,.2)}.title-survival{font-size:1.5rem;font-weight:300;letter-spacing:.5em;color:#fff9;text-transform:uppercase}.subtitle{color:#fff6;font-size:.9rem;margin-bottom:2rem}.controls{text-align:left;display:flex;flex-direction:column;gap:.5rem;margin-bottom:1.5rem;font-size:.85rem;color:#ffffff80}.controls div{display:flex;align-items:center;gap:.75rem}kbd{display:inline-block;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.7rem;background:#ffffff14;border:1px solid rgba(255,255,255,.15);border-radius:4px;padding:.2rem .5rem;min-width:2.5rem;text-align:center;color:#fffc}.highscore{font-size:.85rem;color:#ffc832b3;margin-bottom:1.5rem}.btn{font-family:inherit;font-size:1rem;font-weight:700;letter-spacing:.15em;text-transform:uppercase;padding:.85rem 2.5rem;border:2px solid #44cc44;border-radius:.5rem;background:#44cc441a;color:#4c4;cursor:pointer;transition:all .2s}.btn:hover{background:#4c4;color:#000;box-shadow:0 0 25px #44cc444d}.btn:active{transform:scale(.97)}.gameover-title{font-size:3rem;font-weight:900;color:#f33;text-shadow:0 0 30px rgba(255,51,51,.4);letter-spacing:.1em;margin-bottom:1.5rem}.stats{display:flex;justify-content:center;gap:2.5rem;margin-bottom:1.5rem}.stat{display:flex;flex-direction:column;gap:.25rem}.stat-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.15em;color:#fff6}.stat-value{font-size:2rem;font-weight:700;color:#fff}.new-record{color:#fc0;font-weight:700;font-size:1rem;letter-spacing:.1em;margin-bottom:1.5rem;text-shadow:0 0 15px rgba(255,204,0,.4);animation:pulse 1s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.6}}.gameover-menu .btn{border-color:#f33;color:#f33;background:#ff33331a}.gameover-menu .btn:hover{background:#f33;color:#000;box-shadow:0 0 25px #ff33334d}