:root{--bg-primary:#0a0e17;--bg-secondary:#111827;--bg-surface:#111827d9;--bg-glass:#0f172abf;--border-glass:#6366f133;--border-hover:#6366f166;--accent-primary:#6366f1;--accent-primary-glow:#6366f14d;--accent-cyan:#06b6d4;--accent-cyan-glow:#06b6d44d;--accent-green:#10b981;--accent-red:#ef4444;--accent-orange:#f59e0b;--accent-pink:#ec4899;--accent-purple:#8b5cf6;--force-gravity:#ef4444;--force-normal:#3b82f6;--force-friction:#10b981;--force-parallel:#f59e0b;--force-net:#ec4899;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;--text-accent:#a5b4fc;--panel-padding:16px;--panel-radius:16px;--gap:12px;--font-main:"Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono:"JetBrains Mono", "Fira Code", monospace;--transition-fast:.15s cubic-bezier(.4, 0, .2, 1);--transition-normal:.25s cubic-bezier(.4, 0, .2, 1);--transition-slow:.4s cubic-bezier(.4, 0, .2, 1)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%;font-family:var(--font-main);background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow:hidden}.icon{stroke-width:2px;width:20px;height:20px}.icon-sm{stroke-width:2px;vertical-align:-2px;width:14px;height:14px;display:inline-block}.icon-xs{stroke-width:2px;vertical-align:-1px;width:12px;height:12px;display:inline-block}#app{width:100%;height:100%;position:relative}#game-container{z-index:1;width:100%;height:100%;position:absolute;top:0;left:0}#game-container canvas{display:block;width:100%!important;height:100%!important}#ui-overlay{z-index:10;pointer-events:none;flex-direction:column;width:100%;height:100%;display:flex;position:absolute;top:0;left:0}#ui-overlay>*{pointer-events:auto}.toast-notification{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--accent-cyan);color:#fff;z-index:9999;background:#0f172ae6;border-radius:30px;padding:10px 24px;font-size:.85rem;font-weight:500;animation:.3s cubic-bezier(.175,.885,.32,1.275) slideDownToast;position:fixed;top:70px;left:50%;transform:translate(-50%);box-shadow:0 4px 20px #06b6d44d}@keyframes slideDownToast{0%{opacity:0;top:0}to{opacity:1;top:70px}}#top-bar{-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-glass);background:linear-gradient(#0a0e17f2 0%,#0a0e17b3 100%);flex-shrink:0;justify-content:space-between;align-items:center;height:52px;padding:8px 16px;display:flex}.top-bar-left{align-items:center;gap:10px;display:flex}.top-bar-left .logo{filter:drop-shadow(0 0 8px var(--accent-cyan-glow));font-size:1.4rem}.top-bar-left h1{background:linear-gradient(135deg, var(--text-primary), var(--accent-cyan));-webkit-text-fill-color:transparent;letter-spacing:-.02em;-webkit-background-clip:text;background-clip:text;font-size:1rem;font-weight:700}.badge{background:linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));color:#fff;text-transform:uppercase;letter-spacing:.1em;border-radius:20px;padding:2px 8px;font-size:.6rem;font-weight:700}.top-bar-center{background:#0000004d;border:1px solid #ffffff0d;border-radius:12px;align-items:center;gap:4px;padding:3px;display:flex}.nav-btn{color:var(--text-secondary);font-family:var(--font-main);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;background:0 0;border:none;border-radius:9px;align-items:center;gap:6px;padding:6px 14px;font-size:.75rem;font-weight:500;display:flex}.nav-btn:hover{color:var(--text-primary);background:#ffffff0d}.nav-btn.active{color:#fff;background:linear-gradient(135deg, var(--accent-primary), var(--accent-purple));box-shadow:0 2px 12px var(--accent-primary-glow)}.nav-btn .nav-icon{font-size:.9rem}.fps{font-family:var(--font-mono);color:var(--accent-green);background:#10b9811a;border:1px solid #10b98133;border-radius:8px;padding:3px 10px;font-size:.7rem}.glass-panel{background:var(--bg-glass);-webkit-backdrop-filter:blur(24px);border:1px solid var(--border-glass);border-radius:var(--panel-radius);transition:border-color var(--transition-normal);box-shadow:0 8px 32px #0000004d,inset 0 1px #ffffff0d}.glass-panel:hover{border-color:var(--border-hover)}.panel-header{padding:12px var(--panel-padding);border-bottom:1px solid #ffffff0d;justify-content:space-between;align-items:center;display:flex}.panel-header h2{color:var(--text-primary);letter-spacing:-.01em;font-size:.8rem;font-weight:600}.panel-toggle{width:24px;height:24px;color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast);background:#ffffff0d;border:1px solid #ffffff1a;border-radius:6px;justify-content:center;align-items:center;font-size:.8rem;display:flex}.panel-toggle:hover{color:var(--text-primary);background:#ffffff1a}.panel-content{padding:var(--panel-padding);max-height:400px;overflow-y:auto}.panel-content::-webkit-scrollbar{width:4px}.panel-content::-webkit-scrollbar-track{background:0 0}.panel-content::-webkit-scrollbar-thumb{background:var(--border-glass);border-radius:4px}#control-panel{z-index:20;width:280px;max-height:calc(100vh - 80px);animation:slideInRight var(--transition-slow) ease-out;position:absolute;top:64px;right:12px}@keyframes slideInRight{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}.control-group{margin-bottom:14px}.control-group:last-child{margin-bottom:0}.control-label{justify-content:space-between;align-items:center;margin-bottom:6px;display:flex}.control-label span{color:var(--text-secondary);font-size:.75rem;font-weight:500}.control-value{font-family:var(--font-mono);color:var(--accent-cyan);background:#06b6d41a;border-radius:6px;padding:1px 8px;font-size:.75rem;font-weight:600}input[type=range]{appearance:none;background:linear-gradient(90deg, var(--accent-primary), var(--accent-cyan));cursor:pointer;width:100%;height:6px;transition:all var(--transition-fast);border-radius:3px;outline:none}input[type=range]::-webkit-slider-thumb{appearance:none;border:2px solid var(--accent-primary);cursor:pointer;width:18px;height:18px;transition:all var(--transition-fast);background:#fff;border-radius:50%;box-shadow:0 2px 8px #6366f166}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.2);box-shadow:0 2px 16px #6366f199}input[type=range]::-moz-range-thumb{border:2px solid var(--accent-primary);cursor:pointer;background:#fff;border-radius:50%;width:18px;height:18px;box-shadow:0 2px 8px #6366f166}.material-grid{grid-template-columns:1fr 1fr;gap:6px;display:grid}.material-btn{color:var(--text-secondary);font-family:var(--font-main);cursor:pointer;transition:all var(--transition-fast);text-align:center;background:#ffffff08;border:1px solid #ffffff1a;border-radius:10px;padding:8px 10px;font-size:.7rem;font-weight:500}.material-btn:hover{border-color:var(--accent-primary);color:var(--text-primary);background:#6366f114}.material-btn.active{border-color:var(--accent-primary);color:#fff;box-shadow:0 2px 8px var(--accent-primary-glow);background:linear-gradient(135deg,#6366f126,#06b6d41a)}.material-btn .material-icon{margin-bottom:2px;font-size:1.1rem;display:block}.material-btn .material-mu{font-family:var(--font-mono);color:var(--text-muted);font-size:.6rem}.material-btn.active .material-mu{color:var(--accent-cyan)}.panel-actions{padding:12px var(--panel-padding);border-top:1px solid #ffffff0d;flex-wrap:wrap;gap:6px;display:flex}.action-btn{min-width:70px;font-family:var(--font-main);cursor:pointer;transition:all var(--transition-fast);letter-spacing:.01em;border:none;border-radius:10px;flex:1;padding:8px 12px;font-size:.72rem;font-weight:600}.play-btn{color:#fff;background:linear-gradient(135deg,#10b981,#059669);box-shadow:0 2px 12px #10b9814d}.play-btn:hover{transform:translateY(-1px);box-shadow:0 4px 20px #10b98180}.pause-btn{color:#fff;background:linear-gradient(135deg,#f59e0b,#d97706);box-shadow:0 2px 12px #f59e0b4d}.pause-btn:hover{transform:translateY(-1px);box-shadow:0 4px 20px #f59e0b80}.reset-btn{color:var(--accent-red);background:#ef444426;border:1px solid #ef444433}.reset-btn:hover{background:#ef444440;transform:translateY(-1px)}.step-btn{color:var(--accent-primary);background:#6366f126;border:1px solid #6366f133}.step-btn:hover{background:#6366f140;transform:translateY(-1px)}#formula-panel{z-index:20;width:380px;max-height:320px;animation:slideInUp var(--transition-slow) ease-out;position:absolute;bottom:12px;left:12px}@keyframes slideInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.formula-row{border-bottom:1px solid #ffffff08;justify-content:space-between;align-items:center;padding:6px 0;display:flex}.formula-row:last-child{border-bottom:none}.formula-name{color:var(--text-muted);min-width:70px;font-size:.7rem;font-weight:500}.formula-expr{text-align:center;flex:1;font-size:.85rem}.formula-value{font-family:var(--font-mono);color:var(--accent-cyan);text-align:right;background:#06b6d414;border-radius:6px;min-width:70px;padding:2px 10px;font-size:.72rem;font-weight:600}.katex{color:var(--text-primary);font-size:.9em!important}#data-panel{z-index:20;width:320px;max-height:350px;animation:slideInUp var(--transition-slow) ease-out;position:absolute;bottom:12px;right:12px}#live-values{grid-template-columns:1fr 1fr;gap:8px;margin-bottom:12px;display:grid}.live-value-card{text-align:center;background:#ffffff08;border:1px solid #ffffff0d;border-radius:10px;padding:8px 10px}.live-value-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:3px;font-size:.6rem}.live-value-number{font-family:var(--font-mono);letter-spacing:-.02em;font-size:1rem;font-weight:700}.live-value-unit{color:var(--text-muted);margin-left:2px;font-size:.6rem}#energy-chart{border-radius:8px;width:100%!important;height:160px!important}.hidden{display:none!important}.panel.collapsed .panel-content,.panel.collapsed .panel-actions{display:none}.panel.collapsed{max-height:44px;overflow:hidden}@media (width<=1200px){#formula-panel{width:320px}#control-panel{width:250px}}@media (width<=900px){.top-bar-center{display:none}#formula-panel,#data-panel{width:calc(50% - 18px)}#control-panel{width:220px}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}@keyframes glow{0%,to{box-shadow:0 0 8px var(--accent-primary-glow)}50%{box-shadow:0 0 20px var(--accent-primary-glow)}}.simulating .play-btn{animation:1.5s infinite pulse}@keyframes scaleIn{0%{opacity:0;transform:scale(.95)translate(5px,5px)}to{opacity:1;transform:scale(1)translate(5px,5px)}}.context-menu-btn:hover{color:#fff!important;background:#ffffff14!important}.context-menu-btn-danger:hover{color:#f87171!important;background:#ef444426!important}