.app{min-height:100vh;display:flex;flex-direction:column;background:var(--bg)}.hdr{background:#ffffffe6;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50;box-shadow:0 1px 3px #0000000d}.hdr-inner{max-width:1160px;margin:0 auto;padding:0 24px;height:62px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:12px}.brand-icon{width:38px;height:38px;border-radius:10px;flex-shrink:0;background:linear-gradient(135deg,#6366f1,#0891b2);display:grid;place-items:center;font-weight:700;font-size:12px;color:#fff}.brand-name{font-family:var(--font-d);font-weight:600;font-size:15px;color:var(--text)}.brand-sub{font-size:11px;color:var(--muted2);font-family:var(--font-m)}.tabs{display:flex;gap:4px}.tab{padding:7px 15px;border-radius:8px;border:1px solid transparent;background:transparent;color:var(--muted);font-size:13.5px;cursor:pointer;transition:all .15s;font-family:var(--font-b)}.tab:hover{color:var(--text);background:var(--card2)}.tab-on{color:#6366f1;background:#eef2ff;border-color:#c7d2fe}.main{flex:1;max-width:1160px;margin:0 auto;width:100%;padding:28px 24px 60px}.play{display:flex;flex-direction:column;gap:16px}.algo-picker{display:flex;gap:8px;flex-wrap:wrap}.algo-btn{display:flex;align-items:center;gap:8px;padding:10px 18px;border-radius:100px;border:1.5px solid var(--border);background:var(--white);color:var(--muted);font-size:13.5px;font-weight:500;cursor:pointer;transition:all .2s;font-family:var(--font-b);box-shadow:var(--shadow)}.algo-btn:hover{border-color:var(--border2);color:var(--text);transform:translateY(-1px)}.algo-btn.algo-on{border-color:var(--abr);background:var(--ab);color:var(--ac);box-shadow:0 4px 12px #00000014}.ab-emoji{font-size:16px}.ab-label{font-weight:600}.algo-banner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;padding:16px 20px;border-radius:14px;border:1.5px solid var(--abr);background:var(--ab);box-shadow:var(--shadow)}.ab-left{display:flex;align-items:center;gap:14px}.ab-big-emoji{font-size:32px}.ab-title{font-family:var(--font-d);font-size:17px;font-weight:700;margin-bottom:3px}.ab-desc{font-size:13.5px;color:var(--muted)}.ab-right{display:flex;flex-direction:column;align-items:flex-end;gap:5px}.ab-pill{font-size:11.5px;font-family:var(--font-m);color:var(--ac);background:#ffffffb3;padding:4px 10px;border-radius:100px;border:1px solid var(--abr)}.ab-usecase{font-size:12px;color:var(--muted);text-align:right}.ctrl-bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;padding:14px 18px;background:var(--white);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow)}.ctrl-grp{display:flex;align-items:center;gap:10px}.cl{font-size:12.5px;color:var(--muted);font-family:var(--font-m)}.sl{width:140px;accent-color:#6366F1}.cv{font-size:13px;font-weight:500;color:#6366f1;font-family:var(--font-m);min-width:48px}.ctrl-right{display:flex;align-items:center;gap:10px}.req-counter{display:flex;flex-direction:column;align-items:center;padding:6px 14px;background:#eef2ff;border-radius:8px;border:1px solid #C7D2FE}.rc-n{font-size:18px;font-weight:700;color:#6366f1;line-height:1;font-family:var(--font-d)}.rc-l{font-size:10px;color:var(--muted2);font-family:var(--font-m)}.btn-run{padding:10px 22px;border-radius:100px;border:none;background:linear-gradient(135deg,#6366f1,#0891b2);color:#fff;font-weight:600;font-size:14px;cursor:pointer;transition:all .2s;font-family:var(--font-b);box-shadow:0 4px 14px #6366f159}.btn-run:hover{transform:translateY(-2px);box-shadow:0 6px 20px #6366f173}.btn-stop{background:linear-gradient(135deg,#f87171,#fb923c);box-shadow:0 4px 14px #f871714d}.btn-step,.btn-reset{padding:10px 16px;border-radius:100px;border:1.5px solid var(--border2);background:var(--white);color:var(--text);font-size:13.5px;cursor:pointer;transition:all .15s;font-family:var(--font-b)}.btn-step:hover:not(:disabled),.btn-reset:hover{background:var(--card2)}.btn-step:disabled{opacity:.4;cursor:not-allowed}.viz-area{display:grid;grid-template-columns:200px 140px 1fr;gap:16px;align-items:start}.section-label{font-size:11px;text-transform:uppercase;letter-spacing:1.5px;color:var(--muted2);font-family:var(--font-m);font-weight:600;margin-bottom:10px}.section-label-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.add-server-btn{font-size:12px;padding:5px 12px;border-radius:8px;border:1.5px dashed var(--border2);background:transparent;color:var(--muted);cursor:pointer;transition:all .15s;font-family:var(--font-b)}.add-server-btn:hover:not(:disabled){border-color:#6366f1;color:#6366f1}.add-server-btn:disabled{opacity:.4;cursor:not-allowed}.clients{display:flex;flex-direction:column;gap:7px}.client{display:flex;align-items:center;gap:8px;padding:8px 12px;background:var(--white);border:1px solid var(--border);border-radius:10px;transition:all .2s;box-shadow:var(--shadow)}.client-active{border-color:#6366f1;background:#eef2ff;transform:translate(4px)}.client-icon{font-size:14px}.client-ip{font-size:11px;color:var(--muted);font-family:var(--font-m);flex:1}.client-sending{font-size:14px;color:#6366f1;font-weight:700;animation:slide-up .2s ease}.lb-col{display:flex;flex-direction:column;align-items:center}.lb-box{width:110px;height:110px;border-radius:20px;background:var(--ab);border:2.5px solid var(--ac);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;position:relative;box-shadow:0 4px 20px #00000014;transition:box-shadow .2s}.lb-emoji{font-size:28px}.lb-name{font-size:13px;font-weight:700;color:var(--ac);font-family:var(--font-d)}.lb-status{font-size:10px;color:var(--muted2)}.lb-spin{display:inline-block;animation:spin 1s linear infinite;color:var(--ac)}.lb-req-count{position:absolute;top:-8px;right:-8px;width:22px;height:22px;background:#6366f1;color:#fff;border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:700;animation:badge-pop .2s ease}.fly-area{margin-top:8px;display:flex;flex-direction:column;gap:4px;min-height:40px}.fly-req{font-size:12px;font-weight:600;color:var(--sc,#6366F1);animation:request-fly .7s ease both;background:#fff;padding:3px 8px;border-radius:6px;border:1px solid currentColor;opacity:0}.servers-list{display:flex;flex-direction:column;gap:8px}.server-card{display:flex;align-items:center;gap:12px;padding:13px 14px;background:var(--white);border:1.5px solid var(--border);border-radius:13px;box-shadow:var(--shadow);transition:all .25s}.server-active{border-color:var(--sc)!important;box-shadow:0 0 0 3px #6366f11f,var(--shadow)!important;animation:server-pulse .4s ease}.sc-left{display:flex;align-items:center;gap:10px}.sc-icon{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;font-size:16px;font-weight:700;flex-shrink:0}.sc-name{font-size:14px;font-weight:600;color:var(--text)}.sc-meta{display:flex;align-items:center;gap:6px;margin-top:3px;flex-wrap:wrap}.sc-tag{font-size:11px;font-weight:600;padding:2px 7px;border-radius:5px}.sc-latency{font-size:11px;color:var(--muted2);font-family:var(--font-m)}.sc-active-conn{font-size:11px;font-weight:600}.sc-right{flex:1;display:flex;align-items:center;gap:10px}.sc-bar-wrap{flex:1;height:7px;background:var(--card2);border-radius:100px;overflow:hidden}.sc-bar{height:100%;border-radius:100px;transition:width .4s ease;animation:bar-grow .4s ease}.sc-stats{display:flex;flex-direction:column;align-items:flex-end;gap:2px;min-width:70px}.sc-pct{font-size:14px;font-weight:700;font-family:var(--font-d)}.sc-reqs{font-size:11px;color:var(--muted2);font-family:var(--font-m)}.sc-remove{width:26px;height:26px;border-radius:7px;border:1px solid var(--border);background:transparent;color:var(--muted2);cursor:pointer;font-size:16px;display:grid;place-items:center;transition:all .15s;flex-shrink:0}.sc-remove:hover{background:#fef2f2;color:#dc2626;border-color:#fecaca}.server-config{background:var(--white);border:1px solid var(--border);border-radius:14px;padding:18px;box-shadow:var(--shadow)}.sc-config-title{font-size:12px;text-transform:uppercase;letter-spacing:1px;color:var(--muted2);font-family:var(--font-m);margin-bottom:14px}.sc-config-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.sc-config-card{background:var(--card2);border-radius:10px;padding:12px}.scc-header{display:flex;align-items:center;gap:7px;margin-bottom:10px}.scc-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}.scc-name{font-size:13px;font-weight:600}.scc-ctrl{margin-bottom:8px}.scc-ctrl:last-child{margin-bottom:0}.scc-ctrl label{font-size:11.5px;color:var(--muted);display:block;margin-bottom:4px}.scc-row{display:flex;align-items:center;gap:8px}.scc-row input[type=range]{flex:1}.scc-row span{font-size:12px;font-weight:600;font-family:var(--font-m);min-width:44px}.ip-map-card{background:var(--white);border:1px solid #FCD34D;border-radius:14px;padding:18px;box-shadow:var(--shadow)}.ip-map-title{font-size:13px;font-weight:600;color:var(--ih);margin-bottom:12px}.ip-map-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:7px}.ip-row{display:flex;align-items:center;gap:8px;padding:8px 12px;background:var(--card2);border-radius:8px;border:1px solid transparent;transition:all .2s}.ip-active{border-color:var(--sc);background:#fff;box-shadow:0 0 0 3px #d977061a}.ip-addr{font-family:var(--font-m);font-size:12px;color:var(--muted);flex:1}.ip-arrow{color:var(--muted2);font-size:12px}.ip-server{font-size:12px;font-weight:700;padding:2px 8px;border-radius:6px}.req-log{background:var(--white);border:1px solid var(--border);border-radius:14px;padding:16px;box-shadow:var(--shadow)}.rl-title{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:var(--muted2);font-family:var(--font-m);margin-bottom:10px}.rl-rows{display:flex;flex-direction:column;gap:3px;max-height:220px;overflow-y:auto}.rl-row{display:flex;align-items:center;gap:10px;padding:6px 10px;border-radius:8px;border-bottom:1px solid var(--border);animation:slide-up .2s ease both}.rl-row:hover{background:var(--card2)}.rl-num{font-size:11px;color:var(--muted2);font-family:var(--font-m);min-width:32px}.rl-ip{font-size:12px;color:var(--muted);font-family:var(--font-m);min-width:110px}.rl-arrow{color:var(--muted2);font-size:12px}.rl-server{font-size:12.5px;font-weight:700;padding:2px 9px;border-radius:6px;flex:1}.rl-algo{font-size:11px;color:var(--muted2);font-family:var(--font-m);background:var(--card2);padding:2px 7px;border-radius:5px}.learn-page,.code-page{padding-bottom:40px}.learn-hdr{text-align:center;margin-bottom:28px}.learn-hdr h2{font-family:var(--font-d);font-size:28px;font-weight:700;letter-spacing:-.02em;margin-bottom:8px}.learn-hdr p{color:var(--muted);font-size:14.5px}.learn-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.learn-card{background:var(--white);border:1.5px solid var(--border);border-radius:16px;padding:22px;display:flex;flex-direction:column;gap:14px;border-top:3px solid var(--ac);box-shadow:var(--shadow)}.lc-top{display:flex;align-items:flex-start;gap:12px}.lc-emoji{font-size:26px;margin-top:2px}.lc-name{font-size:18px;font-weight:700;font-family:var(--font-d)}.lc-key{font-size:11.5px;color:var(--muted2);font-family:var(--font-m);margin-top:2px}.lc-sec{display:flex;flex-direction:column;gap:5px}.lc-lbl{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:var(--muted2);font-weight:600;font-family:var(--font-m)}.lc-sec p{font-size:13.5px;color:var(--muted);line-height:1.65}.lc-sec.best p{color:#065f46}.lc-sec.worst p{color:#92400e}.mono-text{font-family:var(--font-m)!important;font-size:12px!important;color:var(--muted)!important}.code-block{background:var(--white);border:1px solid var(--border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);margin-bottom:14px}.cb-hdr{display:flex;align-items:center;justify-content:space-between;padding:12px 18px;border-bottom:1px solid var(--border);background:var(--card2)}.copy-btn{padding:5px 13px;border-radius:7px;border:1px solid var(--border2);background:var(--white);color:var(--muted);font-size:12.5px;cursor:pointer;transition:all .15s;font-family:var(--font-b)}.copy-btn:hover{color:var(--text)}.cb-code{padding:18px;overflow-x:auto;font-family:var(--font-m);font-size:12.5px;line-height:1.65;color:var(--text);background:#fafbfc;white-space:pre}.footer{max-width:1160px;margin:0 auto;width:100%;padding:22px 24px;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;font-size:12.5px;color:var(--muted2);flex-wrap:wrap;gap:10px}.footer a{color:#6366f1;text-decoration:none}.fm{font-family:var(--font-m)}@media (max-width: 900px){.viz-area,.learn-grid{grid-template-columns:1fr}.tabs .tab{padding:6px 10px;font-size:12px}.algo-picker{gap:6px}.algo-btn{padding:8px 13px;font-size:12.5px}}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #F7F8FC;--white: #FFFFFF;--card: #FFFFFF;--card2: #F3F4F8;--border: #E4E7EF;--border2: #C9CDD8;--text: #111827;--muted: #6B7280;--muted2: #9CA3AF;--shadow: 0 1px 4px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.04);--shadow-md: 0 4px 12px rgba(0,0,0,.08), 0 12px 32px rgba(0,0,0,.06);--rr: #6366F1;--rr-bg: #EEF2FF;--rr-border: #C7D2FE;--wrr: #0891B2;--wrr-bg: #ECFEFF;--wrr-border: #A5F3FC;--lc: #059669;--lc-bg: #ECFDF5;--lc-border: #6EE7B7;--ih: #D97706;--ih-bg: #FFFBEB;--ih-border: #FCD34D;--rnd: #7C3AED;--rnd-bg: #F5F3FF;--rnd-border: #DDD6FE;--hit: #059669;--miss: #DC2626;--font-d: "Space Grotesk", system-ui, sans-serif;--font-b: "Inter", system-ui, sans-serif;--font-m: "JetBrains Mono", ui-monospace, monospace}body{background:var(--bg);color:var(--text);font-family:var(--font-b);-webkit-font-smoothing:antialiased;min-height:100vh}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:var(--card2)}::-webkit-scrollbar-thumb{background:var(--border2);border-radius:3px}@keyframes request-fly{0%{opacity:0;transform:translate(-24px) scale(.8)}15%{opacity:1;transform:translate(0) scale(1)}85%{opacity:1;transform:translate(0) scale(1)}to{opacity:0;transform:translate(8px) scale(.9)}}@keyframes server-pulse{0%{transform:scale(1)}40%{transform:scale(1.06)}to{transform:scale(1)}}@keyframes slide-up{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes bar-grow{0%{width:0}}@keyframes badge-pop{0%{transform:scale(.5);opacity:0}60%{transform:scale(1.15)}to{transform:scale(1);opacity:1}}@keyframes spin{to{transform:rotate(360deg)}}