: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{min-height:100vh;background:#07060b;color:#e8e6f0}#root{display:flex;flex-direction:column;align-items:center;padding:1.5rem 1rem}.game-title{font-size:2rem;font-weight:700;letter-spacing:-.03em;background:linear-gradient(135deg,#a78bfa,#60a5fa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:.25rem}.game-subtitle{font-size:.85rem;color:#fff6;margin-bottom:1.25rem}.board-wrapper{position:relative;margin-bottom:1.25rem}.board{display:grid;gap:2px;background:#13111a;border:2px solid rgba(255,255,255,.08);border-radius:.5rem;padding:2px;-webkit-user-select:none;user-select:none}.cell{width:48px;height:48px;border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:1.25rem;position:relative;transition:background .15s}.cell-floor{background:#1a1725}.cell-wall{background:#2a2637}.cell-exit{background:#1a2a1a}.cell-exit.open{background:#1a3a1a;box-shadow:inset 0 0 12px #4ade8033}.entity-player{position:absolute;width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,#a78bfa,#7c3aed);box-shadow:0 0 12px #a78bfa80;display:flex;align-items:center;justify-content:center;font-size:.9rem;z-index:10;transition:left .12s ease,top .12s ease}.entity-echo{position:absolute;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.9rem;z-index:5;opacity:.6;transition:left .12s ease,top .12s ease}.echo-0{background:linear-gradient(135deg,#60a5fa,#3b82f6);box-shadow:0 0 10px #60a5fa66}.echo-1{background:linear-gradient(135deg,#34d399,#10b981);box-shadow:0 0 10px #34d39966}.echo-2{background:linear-gradient(135deg,#fb923c,#f97316);box-shadow:0 0 10px #fb923c66}.echo-3{background:linear-gradient(135deg,#f472b6,#ec4899);box-shadow:0 0 10px #f472b666}.marker-switch{position:absolute;width:20px;height:20px;border-radius:4px;border:2px solid;display:flex;align-items:center;justify-content:center;font-size:.6rem;z-index:3;transition:all .2s}.marker-switch.off{border-color:#f87171;background:#f8717126}.marker-switch.on{border-color:#4ade80;background:#4ade8040}.marker-door{position:absolute;width:100%;height:100%;border-radius:4px;z-index:2;transition:opacity .3s;display:flex;align-items:center;justify-content:center;font-size:1.1rem}.marker-door.closed{background:#ef444433;border:2px solid rgba(239,68,68,.5)}.marker-door.open{background:#4ade801a;border:2px solid rgba(74,222,128,.2);opacity:.3}.marker-key{position:absolute;font-size:1.1rem;z-index:3;animation:keyBob 1.5s ease-in-out infinite}@keyframes keyBob{0%,to{transform:translateY(0)}50%{transform:translateY(-3px)}}.hud{display:flex;gap:1rem;align-items:center;flex-wrap:wrap;justify-content:center;margin-bottom:1rem}.hud-item{font-size:.8rem;color:#ffffff80;display:flex;align-items:center;gap:.35rem}.hud-item span{color:#e8e6f0;font-weight:600}.btn{padding:.5rem 1.2rem;border-radius:.5rem;border:1px solid rgba(255,255,255,.15);background:#ffffff0d;color:#e8e6f0;font-size:.85rem;cursor:pointer;transition:all .15s;display:flex;align-items:center;gap:.4rem}.btn:hover{background:#ffffff1a;border-color:#ffffff40}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.3;cursor:not-allowed}.btn-rewind{border-color:#a78bfa66;background:#a78bfa1a}.btn-rewind:hover{background:#a78bfa33}.controls{display:flex;gap:.5rem;flex-wrap:wrap;justify-content:center;margin-bottom:1rem}.timeline-bar{width:100%;max-width:500px;height:6px;background:#ffffff0f;border-radius:3px;position:relative;margin-bottom:.5rem;cursor:pointer}.timeline-fill{height:100%;border-radius:3px;background:linear-gradient(90deg,#7c3aed,#a78bfa);transition:width .15s}.timeline-marker{position:absolute;top:-3px;width:12px;height:12px;border-radius:50%;background:#a78bfa;border:2px solid #07060b;transform:translate(-50%);transition:left .15s}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#07060bd9;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:100;animation:fadeIn .3s}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.overlay h2{font-size:2rem;font-weight:700;margin-bottom:.5rem;background:linear-gradient(135deg,#4ade80,#22d3ee);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.overlay p{color:#fff9;margin-bottom:1.5rem}.toast{position:fixed;bottom:2rem;left:50%;transform:translate(-50%);background:#171423f2;border:1px solid rgba(255,255,255,.1);padding:.6rem 1.2rem;border-radius:.5rem;font-size:.85rem;color:#e8e6f0;z-index:50;animation:toastIn .3s,toastOut .3s 1.7s forwards;pointer-events:none}@keyframes toastIn{0%{opacity:0;transform:translate(-50%) translateY(10px)}}@keyframes toastOut{to{opacity:0;transform:translate(-50%) translateY(-10px)}}.instructions{max-width:500px;text-align:center;font-size:.78rem;color:#ffffff59;line-height:1.6;margin-top:.5rem}.instructions kbd{display:inline-block;padding:.1rem .4rem;border:1px solid rgba(255,255,255,.15);border-radius:3px;font-family:ui-monospace,monospace;font-size:.72rem;background:#ffffff0d;margin:0 .1rem}