:root{--primary:#4f46e5;--primary-hover:#4338ca;--bg:#111827;--bg-panel:#1f2937;--text:#f9fafb;--text-muted:#9ca3af;--border:#374151;--danger:#ef4444;--success:#10b981;--warning:#f59e0b;--conn-lan:#3b82f6;--conn-uplink:#f59e0b;--conn-wireless:#60a5fa}body{background-color:var(--bg);color:var(--text);margin:0;font-family:Poppins,system-ui,sans-serif;overflow:hidden}.welcome-toast{background:var(--bg-panel);border:1px solid var(--border);z-index:1000;border-radius:12px;flex-direction:column;gap:8px;max-width:320px;padding:15px 20px;animation:.4s cubic-bezier(.16,1,.3,1) slideInLeft;display:flex;position:absolute;top:75px;left:20px;box-shadow:0 10px 25px -5px #00000080}.welcome-toast.closing{animation:.4s cubic-bezier(.16,1,.3,1) forwards slideOutLeft}.welcome-toast h2{color:var(--primary);align-items:center;gap:8px;margin:0;font-size:1.1rem;display:flex}.welcome-toast p{color:var(--text-muted);margin:0;font-size:.85rem;line-height:1.5}@keyframes slideInLeft{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}@keyframes slideOutLeft{0%{opacity:1;transform:translate(0)}to{opacity:0;transform:translate(-30px)}}.app-container{flex-direction:column;width:100vw;height:100vh;display:flex}.header{background-color:var(--bg-panel);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;height:60px;padding:0 20px;font-family:Inter,system-ui,sans-serif;display:flex}.main-content{flex:1;display:flex;position:relative;overflow:hidden}.floating-toolbar{z-index:50;-webkit-overflow-scrolling:touch;background-color:#fff;border:1px solid #e5e7eb;border-radius:12px;flex-flow:row;justify-content:flex-start;align-items:center;gap:4px;max-width:95vw;padding:8px 12px;display:flex;position:absolute;bottom:20px;left:50%;overflow-x:auto;transform:translate(-50%);box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}.floating-toolbar::-webkit-scrollbar{height:6px}.floating-toolbar::-webkit-scrollbar-track{background:0 0}.floating-toolbar::-webkit-scrollbar-thumb{background-color:#e5e7eb;border-radius:10px}.toolbar-divider{background-color:#e5e7eb;flex-shrink:0;width:1px;height:35px;margin:0 2px}.floating-toolbar h3{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin:0 0 10px;font-size:.9rem}.device-btn{color:#4b5563;cursor:pointer;background:0 0;border:none;border-radius:8px;flex-direction:column;flex-shrink:0;justify-content:center;align-items:center;gap:2px;min-width:50px;padding:6px 8px;font-size:.65rem;font-weight:600;transition:all .2s;display:flex}.device-btn:hover{background-color:#f3f4f6}.device-btn.active{color:#fff;background-color:#3b82f6}.canvas-area{background-color:#0b0f19;background-image:radial-gradient(var(--border) 1px, transparent 1px);cursor:grab;background-size:20px 20px;flex:1;position:relative;overflow:hidden}.canvas-area:active{cursor:grabbing}.canvas-content{transform-origin:0 0;width:100%;height:100%;position:absolute;top:0;left:0}@keyframes popIn{0%{opacity:0;transform:translate(-50%,-50%)scale(.5)}60%{opacity:1;transform:translate(-50%,-50%)scale(1.1)}to{opacity:1;transform:translate(-50%,-50%)scale(1)}}.device-node{background-color:var(--bg-panel);border:2px solid var(--border);cursor:grab;-webkit-user-select:none;user-select:none;z-index:10;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;width:60px;height:60px;transition:box-shadow .2s,border-color .2s;animation:.4s cubic-bezier(.34,1.56,.64,1) forwards popIn;display:flex;position:absolute;transform:translate(-50%,-50%)}.device-node:active{cursor:grabbing}.device-node.selected{border-color:var(--primary);box-shadow:0 0 0 4px #4f46e533}.device-icon{margin-bottom:4px}.device-label{white-space:nowrap;pointer-events:none;font-size:.7rem}.device-ip{color:var(--text-muted);white-space:nowrap;border-radius:4px;align-items:center;padding:2px 6px;font-size:.65rem;display:flex;position:absolute;bottom:-24px}.device-node.has-conflict{border-color:var(--danger)!important;box-shadow:0 0 0 4px #ef444433!important}.device-conflict-badge{background-color:var(--bg-panel);border-radius:50%;justify-content:center;align-items:center;padding:2px;display:flex;position:absolute;top:-6px;right:-6px}.connection-line{transform-origin:0;z-index:5;cursor:pointer;height:2.5px;transition:box-shadow .2s;position:absolute}.connection-line:before{content:"";position:absolute;inset:-8px 0}.connection-line:hover{box-shadow:0 0 5px #0000004d}.connection-line.selected{box-shadow:0 0 8px 2px var(--primary);z-index:6}.conn-lan{background-color:var(--conn-lan)}.conn-uplink{background-color:var(--conn-uplink)}.conn-wireless{border-top:2px dashed var(--conn-wireless);background-color:#0000}.properties-panel{background-color:var(--bg-panel);border-left:1px solid var(--border);z-index:100;opacity:0;pointer-events:none;box-sizing:border-box;flex-direction:column;gap:15px;width:300px;padding:20px;transition:transform .3s cubic-bezier(.4,0,.2,1),opacity .3s;display:flex;position:absolute;top:0;bottom:0;right:0;overflow-y:auto;transform:translate(100%)}.properties-panel.open{opacity:1;pointer-events:auto;transform:translate(0);box-shadow:-5px 0 20px #0000004d}.properties-header{justify-content:space-between;align-items:center;display:flex}.properties-header h3{margin:0}.close-panel-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;padding:4px;transition:background-color .2s,color .2s;display:flex}.close-panel-btn:hover{color:var(--text);background-color:#ffffff1a}@media (width<=768px){.header{padding:0 10px}.header h1{font-size:1rem!important}.app-container{height:100dvh}.floating-toolbar{-webkit-overflow-scrolling:touch;border-radius:8px;flex-wrap:nowrap;justify-content:flex-start;max-width:95vw;padding:8px;bottom:10px;overflow-x:auto}.device-btn{min-width:55px;padding:6px}.properties-panel{border-left:none;border-top:1px solid var(--border);border-radius:20px 20px 0 0;width:100%;height:auto;max-height:calc(100dvh - 70px);padding-bottom:90px;top:auto;bottom:0;transform:translateY(100%)}.properties-panel.open{transform:translateY(0);box-shadow:0 -5px 20px #0000004d}.ping-popup{animation:.3s cubic-bezier(.16,1,.3,1) slideUpMobile;bottom:80px;left:50%;right:auto;transform:translate(-50%)}.ping-popup.closing{animation:.3s cubic-bezier(.16,1,.3,1) forwards slideDownMobile}@keyframes slideUpMobile{0%{opacity:0;transform:translate(-50%,20px)}to{opacity:1;transform:translate(-50%)}}@keyframes slideDownMobile{0%{opacity:1;transform:translate(-50%)}to{opacity:0;transform:translate(-50%,20px)}}}.form-group{flex-direction:column;gap:5px;display:flex}.form-group label{color:var(--text-muted);font-size:.8rem}.form-group input{border:1px solid var(--border);color:var(--text);background-color:#0003;border-radius:6px;padding:8px 12px;font-family:monospace}.form-group input:focus{border-color:var(--primary);outline:none}.btn{background-color:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:6px;justify-content:center;align-items:center;gap:8px;padding:10px 15px;font-weight:500;transition:background .2s;display:flex}.btn:hover{background-color:var(--primary-hover)}.btn-danger{border:1px solid var(--danger);color:var(--danger);background-color:#0000}.btn-danger:hover{background-color:#ef44441a}.btn-secondary{border:1px solid var(--border);color:var(--text);background-color:#0000}.btn-secondary:hover{background-color:#ffffff0d}.ping-popup{background-color:var(--bg-panel);border:1px solid var(--border);z-index:200;border-radius:12px;flex-direction:column;width:320px;max-width:90vw;max-height:70vh;animation:.3s cubic-bezier(.16,1,.3,1) slideInRight;display:flex;position:absolute;inset:auto 20px 80px auto;overflow:hidden;transform:none;box-shadow:0 10px 25px -5px #00000080}.ping-popup.closing{animation:.3s cubic-bezier(.16,1,.3,1) forwards slideOutRight}@keyframes slideInRight{0%{opacity:0;transform:translate(50px)}to{opacity:1;transform:translate(0)}}@keyframes slideOutRight{0%{opacity:1;transform:translate(0)}to{opacity:0;transform:translate(20px)}}.ping-popup-header{border-bottom:1px solid var(--border);background-color:#0003;justify-content:space-between;align-items:center;padding:12px 15px;display:flex}.ping-popup-content{flex:1;padding:15px;overflow-y:auto}.ping-popup-msg{color:var(--text-muted);text-align:center;font-size:.85rem;line-height:1.5}.ping-result{border-radius:6px;padding:10px;font-size:.85rem;line-height:1.4}.ping-success{border:1px solid var(--success);color:var(--success);background-color:#10b9811a}.ping-fail{border:1px solid var(--danger);color:var(--danger);background-color:#ef44441a}.ping-packet{z-index:20;pointer-events:none;background-color:#ff0;border-radius:50%;width:12px;height:12px;transition:left .5s linear,top .5s linear;position:absolute;transform:translate(-50%,-50%);box-shadow:0 0 10px #ff0}