:root{
  --bg:#0b0d10; --surface:#12161b; --surface-2:#181d24; --line:#232a33;
  --text:#eef1f4; --muted:#8a95a3; --faint:#5b6572;
  --accent:#d4ff3a; --accent-2:#2fe0c4; --up:#b28cff; --warn:#ffb547;
  --font-display:'Clash Grotesk','Segoe UI',sans-serif;
  --font-body:'Satoshi','Segoe UI',sans-serif;
  --r:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--text);font:16px/1.55 var(--font-body);min-height:100vh;
  background-image:radial-gradient(900px 500px at 50% -10%,rgba(212,255,58,.07),transparent 70%)}
a{color:inherit}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

.top{max-width:1080px;margin:0 auto;padding:20px 24px;display:flex;align-items:center;justify-content:space-between}
.brand{font:600 22px/1 var(--font-display);text-decoration:none;letter-spacing:-.01em}
.brand span{color:var(--accent)}
.nav{display:flex;gap:22px;align-items:center;font-size:14px;color:var(--muted)}
.nav a{text-decoration:none}.nav a:hover{color:var(--text)}
.lang{border:1px solid var(--line);border-radius:8px;padding:4px 10px;font-size:13px;font-weight:700}
.lang:hover{border-color:var(--muted)}

main{max-width:1080px;margin:0 auto;padding:0 24px}
.test{display:flex;flex-direction:column;align-items:center;padding:24px 0 40px}
h1{font:500 clamp(26px,4vw,38px)/1.1 var(--font-display);letter-spacing:-.02em;text-align:center;margin-bottom:28px}
h2{font:500 28px/1.2 var(--font-display);letter-spacing:-.01em}
h3{font-size:18px;font-weight:700;margin-bottom:6px}

.metrics{display:flex;gap:16px;justify-content:center;width:100%}
.metric{display:flex;flex-direction:column;align-items:center;min-width:120px;transition:opacity .3s}
.m-label{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-weight:700;display:flex;align-items:center;gap:6px}
.m-val b{font:600 26px/1.2 var(--font-display);font-variant-numeric:tabular-nums}
.m-val small{font-size:13px;color:var(--muted);margin-left:5px}
.metric.big .m-val b{font-size:clamp(34px,6vw,48px)}
.m-hint{font-size:13px;color:var(--faint);text-align:center}
.metrics-top{gap:56px}
.metrics-bottom{gap:clamp(24px,8vw,96px);margin-top:4px}
.metric.active .m-val b{color:var(--accent)}
#m-up.active .m-val b{color:var(--up)}
.arrow{width:14px;height:14px;display:inline-block;border-radius:50%;position:relative;border:2px solid var(--accent-2)}
.arrow.up{border-color:var(--up)}
.arrow::after{content:"";position:absolute;left:50%;top:50%;width:4px;height:4px;border:solid currentColor;border-width:0 2px 2px 0;transform:translate(-50%,-70%) rotate(45deg)}
.arrow.down{color:var(--accent-2)}
.arrow.up{color:var(--up)}
.arrow.up::after{transform:translate(-50%,-30%) rotate(-135deg)}

.gauge-wrap{position:relative;width:min(400px,86vw);aspect-ratio:1;margin:8px 0 -40px}
.gauge{width:100%;height:100%;overflow:visible}
.arc-bg{fill:none;stroke:var(--surface-2);stroke-width:22;stroke-linecap:round}
.arc-fg{fill:none;stroke-width:22;stroke-linecap:round;transition:stroke .3s}
.gauge.up .arc-fg{stroke:var(--up)}
.tick text{fill:var(--faint);font:500 13px var(--font-body);text-anchor:middle;dominant-baseline:middle}
.needle{opacity:0;transition:opacity .3s}
.needle path{fill:var(--text)}
.running .needle{opacity:1}
.gauge-center{position:absolute;inset:0;display:grid;place-items:center}
.start{width:52%;aspect-ratio:1;border-radius:50%;font:600 clamp(26px,5vw,34px)/1 var(--font-display);
  letter-spacing:.04em;text-transform:uppercase;color:var(--bg);background:var(--accent);
  box-shadow:0 0 0 10px rgba(212,255,58,.08),0 0 60px rgba(212,255,58,.25);transition:transform .2s,box-shadow .2s}
.start:hover{transform:scale(1.04);box-shadow:0 0 0 14px rgba(212,255,58,.1),0 0 80px rgba(212,255,58,.35)}
.start:active{transform:scale(.98)}
.start::before{content:"";position:absolute;inset:24%;border-radius:50%;border:2px solid rgba(212,255,58,.35);animation:pulse 2.4s ease-out infinite;pointer-events:none}
@keyframes pulse{from{transform:scale(1);opacity:1}to{transform:scale(1.25);opacity:0}}
.live[hidden]{display:none}
.live{display:flex;flex-direction:column;align-items:center;}
.live-val{font:600 clamp(40px,8vw,58px)/1 var(--font-display);font-variant-numeric:tabular-nums}
.live-unit{font-size:14px;color:var(--muted)}
.live-phase{font-size:12px;color:var(--faint);text-transform:uppercase;letter-spacing:.1em;margin-top:6px}

.progress{width:min(420px,90%);height:3px;background:var(--surface-2);border-radius:3px;margin:28px 0 24px;overflow:hidden}
#bar{height:100%;width:0;background:var(--accent);transition:width .25s linear}

.conn{display:grid;grid-template-columns:repeat(4,auto);gap:1px;width:100%;max-width:820px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.conn div{background:var(--surface);padding:14px 16px;min-width:0}
.conn dt{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-weight:700}
.conn dd{font-size:15px;font-weight:500;overflow-wrap:anywhere;line-height:1.35;font-variant-numeric:tabular-nums}

.status{min-height:24px;margin-top:16px;color:var(--muted);font-size:14px;text-align:center}
.status.err{color:var(--warn)}
.actions{display:flex;gap:12px;margin-top:12px}
.actions[hidden]{display:none}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 20px;border-radius:10px;font-weight:700;font-size:15px;background:var(--accent);color:var(--bg);text-decoration:none;white-space:nowrap}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--muted)}
.link{color:var(--muted);font-size:14px;text-decoration:underline;text-underline-offset:3px}
.link:hover{color:var(--text)}

.down-cta{display:flex;align-items:center;justify-content:space-between;gap:20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px 22px;margin:8px 0 56px}
.down-cta p{color:var(--muted)}
.down-cta strong{color:var(--text)}

.history,.guide{margin-bottom:56px}
.sec-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:16px}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r)}
table{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums}
th{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;text-align:left;padding:12px 16px;background:var(--surface);white-space:nowrap}
td{padding:12px 16px;border-top:1px solid var(--line);white-space:nowrap}
td b{font-weight:700}
.table-wrap.hide{display:none}
.empty{color:var(--muted);font-size:14px;padding:18px;border:1px dashed var(--line);border-radius:var(--r)}
.empty[hidden]{display:none}

.guide h2{margin-bottom:20px}
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.guide article{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.guide p{color:var(--muted);font-size:15px}

.foot{max-width:1080px;margin:0 auto;padding:24px;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:var(--faint);font-size:14px}
.foot a{color:var(--muted)}

.track{display:grid;grid-template-columns:auto 1fr auto;align-items:start;gap:16px;padding:28px 0 8px}
.node{display:flex;flex-direction:column;align-items:center;gap:2px;width:120px;text-align:center}
.node svg{width:40px;height:32px;fill:none;stroke:var(--muted);stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.node .led{fill:var(--accent);stroke:none}
.running-test .node .led{animation:blink .6s steps(2) infinite}
@keyframes blink{50%{opacity:.2}}
.node-name{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-weight:700;margin-top:4px}
.node-ip{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;max-width:140px;overflow-wrap:anywhere;line-height:1.3}
.node-sub{font-size:13px;color:var(--text);max-width:120px;overflow-wrap:break-word;line-height:1.3}
.lane{position:relative;height:84px;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;user-select:none}
.node-srv{position:relative;z-index:3}
.node-srv svg rect{fill:var(--surface-2)}
.dots,.dots-done{position:absolute;left:0;right:0;bottom:22px;height:3px;background:radial-gradient(circle,var(--faint) 1.2px,transparent 1.6px) 0 0/9px 3px repeat-x}
.dots-done{right:auto;width:0;background-image:radial-gradient(circle,var(--accent) 1.4px,transparent 1.8px);transition:width .2s linear}
.dots-done.up{background-image:radial-gradient(circle,var(--up) 1.4px,transparent 1.8px)}
.runner{position:absolute;z-index:1;bottom:20px;left:0;width:30px;height:40px;transform:translateX(-50%);transition:left .2s linear}
.runner svg{width:100%;height:100%;overflow:visible}
.runner path{fill:none;stroke:rgb(238,241,244);stroke-width:6.5;stroke-linecap:round;stroke-linejoin:round}
.runner .head{fill:rgb(238,241,244)}
.runner[data-dir="left"] svg{transform:scaleX(-1)}
.jumpbox{width:100%;height:100%}
.runner.jump .jumpbox{animation:jump var(--jump,.55s) cubic-bezier(.3,.7,.4,1)}
@keyframes jump{0%{transform:translateY(0)}45%{transform:translateY(-34px) rotate(var(--tilt,6deg))}100%{transform:translateY(0)}}
.runner[data-dir="left"]{--tilt:-6deg}
.runner.exit{transition:left 1.4s cubic-bezier(.4,0,.6,1),opacity .25s ease 1.3s;opacity:0}
.runner.gone{opacity:0;transition:none}
.runner.jump .leg-f{animation:none!important;transform:rotate(-60deg)}
.runner.jump .leg-b{animation:none!important;transform:rotate(45deg)}
.runner.jump .leg .shin{animation:none!important;transform:rotate(70deg)}
.runner.jump .leg-f .shin{transform:rotate(20deg)}
.runner[data-phase="up"] path{stroke:rgb(238,241,244)}
.runner[data-phase="up"] .head{fill:rgb(238,241,244)}
.limb,.limb g{transform-box:view-box}
.arm{transform-origin:33px 22px}.arm .fore{transform-origin:33px 34px}
.leg{transform-origin:27px 42px}.leg .shin{transform-origin:27px 57px}
.leg-b path,.arm-b path{opacity:.55}
.runner .limb,.runner .limb g{transition:transform .3s}
.runner[data-state="run"] .leg-f{animation:thighA var(--cyc,.44s) ease-in-out infinite alternate}
.runner[data-state="run"] .leg-b{animation:thighA var(--cyc,.44s) ease-in-out infinite alternate-reverse}
.runner[data-state="run"] .leg-f .shin{animation:shinA var(--cyc,.44s) ease-in-out infinite alternate}
.runner[data-state="run"] .leg-b .shin{animation:shinA var(--cyc,.44s) ease-in-out infinite alternate-reverse}
.runner[data-state="run"] .arm-f{animation:armA var(--cyc,.44s) ease-in-out infinite alternate}
.runner[data-state="run"] .arm-b{animation:armA var(--cyc,.44s) ease-in-out infinite alternate-reverse}
.runner[data-state="run"] .fore{transform:rotate(-85deg)}
.runner[data-state="run"] .body{animation:bob calc(var(--cyc,.44s) / 2) ease-in-out infinite alternate}
@keyframes thighA{from{transform:rotate(-50deg)}to{transform:rotate(38deg)}}
@keyframes shinA{from{transform:rotate(25deg)}to{transform:rotate(95deg)}}
@keyframes armA{from{transform:rotate(45deg)}to{transform:rotate(-55deg)}}
@keyframes bob{from{transform:translateY(0)}to{transform:translateY(-4px)}}
.runner[data-state="idle"] .leg-f{transform:rotate(-6deg)}.runner[data-state="idle"] .leg-b{transform:rotate(8deg)}
.runner[data-state="idle"] .arm-f{transform:rotate(-12deg)}.runner[data-state="idle"] .arm-b{transform:rotate(14deg)}
.runner[data-state="idle"] .fore{transform:rotate(-25deg)}
.runner[data-state="done"] .arm-f{transform:rotate(-155deg)}.runner[data-state="done"] .arm-b{transform:rotate(150deg)}
.runner[data-state="done"] .leg-f{transform:rotate(-10deg)}.runner[data-state="done"] .leg-b{transform:rotate(12deg)}
.runner[data-state="done"] .body{animation:hop .45s ease-in-out 4 alternate}
@keyframes hop{to{transform:translateY(-8px)}}
.trail{position:absolute;top:15px;right:100%;width:0;height:3px;border-radius:3px;opacity:0;background:linear-gradient(90deg,transparent,var(--accent));transition:opacity .3s}
.runner[data-dir="left"] .trail{right:auto;left:100%;transform:scaleX(-1)}
.runner[data-state="run"] .trail{width:16px;opacity:.7;box-shadow:0 -6px 0 -0.5px rgba(212,255,58,.35),0 6px 0 -0.5px rgba(212,255,58,.35)}
.runner[data-phase="up"] .trail{background:linear-gradient(90deg,transparent,var(--up))}
 .obstacles{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.blk{position:absolute;left:0;bottom:23px;display:flex;flex-direction:column-reverse;gap:2px;will-change:transform;transition:opacity .35s}
.blk i{display:block;width:var(--s);height:var(--s);border-radius:2px;background:rgba(47,224,196,.22);border:1.5px solid var(--accent-2);transition:background .2s,border-color .2s,box-shadow .2s}
.blk.up i{background:rgba(178,140,255,.2);border-color:var(--up)}
.blk.hit i{background:var(--warn);border-color:var(--warn)}
.blk.dodged i{background:transparent;border-color:var(--faint)}
.blk.fade{opacity:0}
.lane-label{position:absolute;left:50%;bottom:-2px;transform:translateX(-50%);font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.1em;white-space:nowrap}

@media (max-width:820px){
  .conn{grid-template-columns:repeat(2,1fr)}
  .guide-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){
  /* mobile: icons only at the ends, lane takes almost the full width, labels go under the lane */
  .track{grid-template-columns:28px 1fr 28px;gap:4px;padding:12px 0 64px;position:relative}
  .node{width:28px;position:static;margin-top:26px}
  .node svg{width:28px;height:24px;flex:none}
  .node-srv svg{position:relative;z-index:3}
  .node-name,.node-sub,.node-ip{position:absolute;max-width:46%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:0}
  .node-name{top:108px;font-size:10px}
  .node-sub{top:124px;font-size:12px}
  .node-ip{top:141px;font-size:10px;letter-spacing:-.01em}
  .node-dev .node-name,.node-dev .node-sub,.node-dev .node-ip{left:0;text-align:left}
  .node-srv .node-name,.node-srv .node-sub,.node-srv .node-ip{right:0;text-align:right}
  .runner{width:26px;height:35px}

  .top{padding:16px}
  main{padding:0 16px}
  .nav{gap:14px}
  .metrics-top{gap:32px}
  .metric{min-width:0}
  .down-cta{flex-direction:column;align-items:flex-start}
  .guide-grid{grid-template-columns:1fr}
  .conn dd{font-size:14px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
.test h1{margin-top:8px}
@media (max-width:380px){
  .top{gap:10px}
  .brand{font-size:19px;flex:none}
  .nav{gap:10px;font-size:13px}
  .lang{padding:3px 8px}
}