: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:20px}
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-bottom{gap:clamp(24px,6vw,72px);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(360px,86vw);aspect-ratio:1;margin:4px 0 -36px}
.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}
.start .cd{display:none}
.start.wait>span:first-child{display:none}
.start.wait .cd{display:flex;flex-direction:column;align-items:center;gap:6px}
.start.wait .cd b{font:600 clamp(30px,6vw,42px)/1 var(--font-display);letter-spacing:.02em;font-variant-numeric:tabular-nums}
.start.wait .cd small{font:600 clamp(11px,2.4vw,13px)/1 var(--font-display);letter-spacing:.08em;opacity:.8}
.start.wait{background:transparent;color:var(--accent);box-shadow:inset 0 0 0 3px var(--accent),0 0 40px rgba(212,255,58,.15)}
.start.wait:hover{box-shadow:inset 0 0 0 3px var(--accent),0 0 60px rgba(212,255,58,.3)}
.start.wait::before{border-color:rgba(212,255,58,.2)}
@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}


.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.no-srv{grid-template-columns:repeat(3,auto)}
.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:24px 0 20px;color:var(--muted);font-size:14px;text-align:center}
.status.err{color:var(--warn)}
.retry-hint{margin:-14px 0 22px;font-size:14px;color:var(--text);text-align:center;max-width:420px}
.retry-hint[hidden]{display:none}
.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}
/* data-flow background: faint packet streaks moving the same way as the blocks */
.flow{position:absolute;left:0;right:0;top:6px;bottom:25px;pointer-events:none;overflow:hidden;opacity:0;transition:opacity .5s;--fc:47,224,196;--fd:.9s;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.flow.on{opacity:1}
.flow.up{--fc:178,140,255}
.flow span{position:absolute;left:0;right:0;height:2px;border-radius:2px;background-repeat:repeat-x;animation:flow-l var(--fd) linear infinite}
.flow span:nth-child(1){top:12%;opacity:.35;background-image:linear-gradient(90deg,rgba(var(--fc),.9) 0 26px,transparent 26px 70px,rgba(var(--fc),.6) 70px 82px,transparent 82px);background-size:160px 2px;animation-duration:calc(var(--fd) * 1.15)}
.flow span:nth-child(2){top:42%;opacity:.22;background-image:linear-gradient(90deg,rgba(var(--fc),.9) 0 10px,transparent 10px 54px,rgba(var(--fc),.9) 54px 90px,transparent 90px);background-size:160px 2px;animation-duration:calc(var(--fd) * 1.6)}
.flow span:nth-child(3){top:72%;opacity:.3;height:1.5px;background-image:linear-gradient(90deg,rgba(var(--fc),.9) 0 40px,transparent 40px 96px,rgba(var(--fc),.7) 96px 104px,transparent 104px);background-size:160px 1.5px;animation-duration:var(--fd)}
.flow.rtl span{animation-name:flow-r}
.flow:not(.on) span{animation-play-state:paused}
@keyframes flow-l{from{background-position-x:0}to{background-position-x:160px}}
@keyframes flow-r{from{background-position-x:0}to{background-position-x:-160px}}
@media (prefers-reduced-motion:reduce){.flow span{animation-duration:calc(var(--fd) * 4)!important}}
.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)}
  .conn.no-srv{grid-template-columns:repeat(2,1fr)}.conn.no-srv div:nth-child(3){grid-column:1 / -1}
  .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}
  .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}
}

.conn dd .ip6{display:block;font-size:12px;color:var(--muted);overflow-wrap:anywhere;margin-top:2px;font-weight:400}

/* mobile: results first, gauge below, so all speeds fit on one screen during the test */
@media (max-width:560px){
  .test{padding:6px 0 28px}
  .test h1{font-size:20px;margin:0 0 12px}
  .test > :not(h1):not(.metrics):not(.gauge-wrap):not(.ping-row):not(.status):not(.retry-hint):not(.actions):not(.mlab-ask):not(.modes):not(.ext-opts){order:4}
  .metrics-bottom .m-hint{display:none}
  .live-val{font-size:44px}
}

/* waiting state: spinner in the middle of the lane, runner hidden */
.lane-spin{display:none;position:absolute;left:50%;bottom:22px;width:26px;height:26px;margin-left:-13px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--accent);animation:lane-spin .8s linear infinite}
.lane.waiting .lane-spin{display:block}
.lane.waiting .runner{opacity:0;visibility:hidden}
@keyframes lane-spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.lane-spin{animation-duration:2.4s}}
/* language dropdown */
.langdd{position:relative}
.langdd>summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:4px;user-select:none}
.langdd>summary::-webkit-details-marker{display:none}
.langdd>summary::after{content:"";width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;opacity:.7;transition:transform .15s}
.langdd[open]>summary::after{transform:rotate(180deg)}
.langdd>ul{position:absolute;right:0;top:calc(100% + 6px);z-index:50;list-style:none;margin:0;padding:6px;min-width:150px;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.35)}
.langdd>ul a{display:flex;justify-content:space-between;gap:10px;padding:7px 10px;border-radius:7px;font-size:14px;white-space:nowrap}
.langdd>ul a:hover,.langdd>ul a:focus-visible{background:rgba(255,255,255,.06)}
.langdd>ul a[aria-current]{font-weight:700;color:var(--accent,inherit)}
.langdd>ul a small{opacity:.55;font-size:11px;font-weight:600;text-transform:uppercase}
@media (max-width:360px){.top{padding:14px 12px}.brand{font-size:18px}.nav{gap:8px;font-size:12.5px}.lang{padding:3px 6px}}
.down-cta[hidden]{display:none}

/* ping: idle / under download / under upload */
.ping-row{display:flex;flex-direction:column;align-items:center;gap:6px;margin-bottom:4px}
.ping-row>.m-label small{text-transform:none;letter-spacing:0;font-weight:500;color:var(--faint);margin-left:2px}
.ping-vals{display:flex;gap:clamp(18px,5vw,48px)}
.pv{display:flex;flex-direction:column;align-items:center;min-width:64px}
.pv b{font:600 24px/1.15 var(--font-display);font-variant-numeric:tabular-nums;transition:color .3s}
.pv small{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:5px;white-space:nowrap}
.pv .arrow{transform:scale(.8);flex:none}
.ping-row.active #v-ping{color:var(--accent)}
.test:has(#m-down.active) #v-pdown{color:var(--accent-2)}
.test:has(#m-up.active) #v-pup{color:var(--up)}
.arrow.jit{border-color:var(--warn);color:var(--warn)}
.arrow.jit::after{width:6px;height:0;border-width:0 0 2px 0;transform:translate(-50%,-50%)}
#m-jitter.active .m-val b{color:var(--warn)}
.h-lp{color:var(--muted);font-size:11px;margin:0 2px}
@media (max-width:560px){
  .ping-row{order:1;margin:0 0 2px}
  .gauge-wrap{order:2;width:min(290px,74vw);margin:4px 0 -30px}
  .metrics-bottom{order:3;gap:8px;margin:0}
  .metrics-bottom .metric{flex:1 1 0;min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:9px 4px 8px}
  .metrics-bottom .m-label{font-size:10px;letter-spacing:.03em;gap:4px;white-space:nowrap;max-width:100%;overflow:hidden;text-overflow:ellipsis}
  .metrics-bottom .m-label .arrow{transform:scale(.8);flex:none}
  .metrics-bottom .m-val{display:flex;flex-direction:column;align-items:center;line-height:1.05}
  .metric.big .m-val b{font-size:clamp(20px,7vw,28px)}
  .metrics-bottom .m-val small{margin:2px 0 0;font-size:11px}
  .ping-vals{gap:14px}
  .pv{min-width:0}
  .pv b{font-size:20px}
  .pv small{font-size:10.5px}
}
.m-label .ls{display:none}
@media (max-width:560px){.metrics-bottom .m-label .lf{display:none}.metrics-bottom .m-label .ls{display:inline}}

/* compact mobile: fit more on one screen */
@media (max-width:560px){
  .top{padding:8px 14px}
  .track{padding:0 0 46px}
  .node{margin-top:22px}
  .node-name{top:90px}
  .node-sub{top:104px}
  .node-ip{top:120px}
  .test{padding:0 0 20px}
  .test h1{font-size:18px;margin:12px 0 6px}
  .ping-row{gap:2px;margin:0}
  .ping-row>.m-label{font-size:10px}
  .pv b{font-size:18px}
  .pv small{font-size:10px;gap:3px}
  .gauge-wrap{width:min(240px,64vw);margin:0 0 -30px}
  .live-val{font-size:36px}
  .live-unit{font-size:12px}
  .live-phase{font-size:10px;margin-top:3px}
  .metrics-bottom .metric{padding:6px 4px 6px;border-radius:10px}
  .metric.big .m-val b{font-size:clamp(20px,6.5vw,26px)}
  .metrics-bottom .m-val small{font-size:10px;margin-top:1px}
  .status{margin:10px 0 6px;min-height:20px;font-size:13px}
  .retry-hint{margin:0 0 10px;font-size:13px;line-height:1.35}
  .conn div{padding:8px 10px}
  .conn dt{font-size:10px}
  .conn dd{font-size:13px;line-height:1.3}
  .actions{width:100%;gap:8px;margin-top:10px}
  .actions .btn{flex:1 1 0;min-width:0;padding:10px 8px;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
}
/* actions sit right under the retry hint, above the connection details */
.retry-hint{margin-bottom:14px}
.actions{margin:0 0 24px}
@media (max-width:560px){.retry-hint{margin-bottom:8px}.actions{margin:0 0 12px}}
@media (max-width:560px){.actions .btn{flex:1 1 auto;padding:10px 8px;font-size:13.5px;white-space:normal;line-height:1.2;text-align:center;overflow:visible}}
/* status, retry hint and buttons sit right under the H1 */
.test h1 + .status{margin:0 0 12px}
.test .retry-hint{margin:-4px 0 12px}
.test .actions{margin:0 0 18px}
@media (max-width:560px){.test h1 + .status{margin:0 0 6px;min-height:18px}.test .retry-hint{margin:0 0 8px}.test .actions{margin:0 0 10px}}
@media (max-width:340px){.top{padding:14px 10px}.brand{font-size:17px}.nav{gap:7px;font-size:12px}}
/* desktop/tablet: outlined cards for download/upload/jitter and space before the connection block */
@media (min-width:561px){
  .metrics-bottom{gap:16px;max-width:820px;margin:8px 0 24px}
  .metrics-bottom .metric{flex:1 1 0;min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 12px 14px}
}
@media (max-width:560px){.metrics-bottom{margin-bottom:12px}}
.lane.route .runner,.lane.route .obstacles,.lane.route .dots-done{opacity:0;transition:none}
/* desktop: compact two-column layout - gauge on the left, ping/speeds/connection on the right */
@media (min-width:900px){
  .test{display:grid;grid-template-columns:340px minmax(0,1fr);column-gap:44px;align-items:center;max-width:980px;margin:0 auto;padding:10px 0 32px}
  .test > h1{grid-column:1/-1;grid-row:1;justify-self:center;margin:0 0 8px}
  .test > .status{grid-column:1/-1;grid-row:2;justify-self:center;margin:0 0 6px;min-height:20px}
  .test > .retry-hint{grid-column:1/-1;grid-row:3;justify-self:center;margin:0 0 10px;max-width:none}
  .test > .actions{grid-column:1/-1;grid-row:4;justify-self:center;margin:0 0 14px}
  .test > .gauge-wrap{grid-column:1;grid-row:5/8;width:340px;margin:0;align-self:center}
  .test > .ping-row{grid-column:2;grid-row:5;margin:0 0 14px;align-self:end}
  .test > .metrics-bottom{grid-column:2;grid-row:6;max-width:none;margin:0 0 14px}
  .test > .conn{grid-column:2;grid-row:7;grid-template-columns:repeat(2,minmax(0,1fr));max-width:none;align-self:start}
}
/* mode switch (standard / advanced) */
.modes{display:inline-flex;gap:2px;padding:3px;border:1px solid var(--line);border-radius:999px;background:var(--surface);margin:0 0 12px}
.modes a{padding:5px 14px;border-radius:999px;font-size:13px;font-weight:600;color:var(--muted);text-decoration:none;white-space:nowrap}
.modes a:hover{color:var(--text)}
.modes a[aria-current]{background:var(--accent);color:var(--bg)}
/* advanced mode options */
.ext-opts{width:100%;max-width:820px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;margin:0 0 14px}
.ext-intro{font-size:13px;color:var(--muted);margin:0 0 12px;line-height:1.45}
.opt-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px 12px}
.opt-grid label{display:flex;flex-direction:column;gap:5px;font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-weight:700;min-width:0}
.opt-grid label>span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.opt-grid select{appearance:none;-webkit-appearance:none;width:100%;min-width:0;background:var(--surface-2) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%239aa4b2' stroke-width='1.6'/%3E%3C/svg%3E") no-repeat right 10px center;border:1px solid var(--line);border-radius:8px;color:var(--text);font:inherit;font-size:14px;font-weight:500;text-transform:none;letter-spacing:0;padding:8px 28px 8px 10px;cursor:pointer}
.opt-grid select:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
.opt-grid select:disabled{opacity:.55;cursor:default}
.ext-run{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.ext-run[hidden]{display:none}
.series-info{font-size:14px;font-weight:600;color:var(--text);font-variant-numeric:tabular-nums}
.btn.small{padding:7px 14px;font-size:13px}
.btn[hidden]{display:none}
.series[hidden]{display:none}
.series tfoot td{background:var(--surface);color:var(--muted)}
.series tfoot td b{color:var(--text)}
.series tfoot tr.agg td:nth-child(2){color:var(--text);font-weight:600}
@media (max-width:560px){
  .modes{margin:0 0 8px}.modes a{padding:4px 12px;font-size:12.5px}
  .ext-opts{padding:10px 12px;margin:0 0 8px}
  .ext-intro{font-size:12.5px;margin:0 0 8px;line-height:1.4}
  .opt-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 10px}
  .opt-grid label{font-size:10px;gap:4px}
  .opt-grid select{font-size:14px;padding:7px 26px 7px 9px}
  .ext-run{margin-top:8px;padding-top:8px}
  .test > .modes,.test > .ext-opts{order:0}
}
/* desktop grid with the mode switch and options on top */
@media (min-width:900px){
  .test > .modes{grid-column:1/-1;grid-row:2;justify-self:center;margin:0 0 12px}
  .test > .ext-opts{grid-column:1/-1;grid-row:3;justify-self:center;margin:0 0 14px}
  .test > .status{grid-row:4}.test > .retry-hint{grid-row:5}.test > .actions{grid-row:6}
  .test > .gauge-wrap{grid-row:7/10}.test > .ping-row{grid-row:7}.test > .metrics-bottom{grid-row:8}.test > .conn{grid-row:9}
}
@media (min-width:561px){.metrics-bottom .m-val{white-space:nowrap}}
.lane.pre .runner{opacity:0;visibility:hidden}
/* series chart */
.series-chart{margin:0 0 16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 14px 12px}
.series-chart[hidden],.sc-note[hidden]{display:none}
.sc-note{margin:-6px 0 12px;font-size:13px;color:var(--muted)}
.sc-svg{width:100%;overflow:hidden}
.sc-svg svg{display:block;width:100%;height:auto;font-family:inherit}
.sc-grid{stroke:var(--line);stroke-width:1}
.sc-axis{stroke:var(--muted);stroke-width:1}
.sc-tick,.sc-x{fill:var(--muted);font-size:11px;font-variant-numeric:tabular-nums}
.sc-unit{fill:var(--muted);font-size:11px;font-weight:700}
.sc-ping{fill:#7d8794;opacity:.75}
.sc-jit{fill:#e3e7ec;opacity:.85}
.sc-line{fill:none;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}
.sc-line.down{stroke:var(--accent-2)}.sc-line.up{stroke:var(--up)}
.sc-dot{stroke:var(--surface);stroke-width:2}
.sc-dot.down{fill:var(--accent-2)}.sc-dot.up{fill:var(--up)}
.sc-tag rect{opacity:.95}.sc-tag.down rect{fill:var(--accent-2)}.sc-tag.up rect{fill:var(--up)}
.sc-tag text{fill:#0b0d10;font-size:12px;font-weight:700;font-variant-numeric:tabular-nums}
.sc-legend{display:flex;justify-content:center;flex-wrap:wrap;gap:6px 18px;margin-top:8px;font-size:13px;color:var(--text)}
.sc-legend span{display:inline-flex;align-items:center;gap:7px}
.sc-legend span::before{content:"";width:11px;height:11px;border-radius:50%}
.lg-down::before{background:var(--accent-2)}.lg-up::before{background:var(--up)}
.lg-ping::before{background:#7d8794;border-radius:2px!important}.lg-jit::before{background:#e3e7ec;border-radius:2px!important}
@media (max-width:560px){.series-chart{padding:10px 6px 10px}.sc-tick,.sc-x,.sc-unit{font-size:10px}.sc-tag text{font-size:10.5px}.sc-legend{font-size:12px;gap:4px 14px}}

#results td small.h-sub{display:block;margin-top:2px;font-size:12px;color:var(--muted);font-weight:400;white-space:nowrap}
#results .h-ip{font-variant-numeric:tabular-nums;white-space:nowrap}

.res-link{color:inherit;text-decoration:underline;text-decoration-color:var(--faint);text-underline-offset:3px}
.res-link:hover{color:var(--accent);text-decoration-color:var(--accent)}
html[data-mode="result"] #results,html[data-mode="result"] #retryHint{display:none}
.pv[hidden]{display:none}

/* shared result page (/result/CODE): minimal card */
.res{max-width:760px}
.res-card{margin:12px auto 48px;padding:28px clamp(16px,4vw,40px) 32px;background:var(--surface);border:1px solid var(--line);border-radius:20px;display:flex;flex-direction:column;align-items:center;gap:26px}
.res-head{align-self:stretch;display:flex;flex-direction:column;gap:2px}
.res-head h1{text-align:left;margin:0;font-size:clamp(24px,4vw,32px);color:var(--accent)}
.res-head time{font-size:14px;color:var(--muted);font-variant-numeric:tabular-nums}
.res-ping{display:flex;align-items:flex-end;justify-content:center;gap:clamp(14px,4vw,32px);flex-wrap:wrap}
.rp-l{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-weight:700;align-self:center}
.rp{display:flex;flex-direction:column;align-items:center}
.rp b{font:600 24px/1.15 var(--font-display);font-variant-numeric:tabular-nums}
.rp small{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:5px;white-space:nowrap}
.rp .arrow{transform:scale(.8)}
.res-tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(10px,3vw,28px);width:100%}
.rt{display:flex;flex-direction:column;align-items:center;gap:8px}
.rt-l{font-size:15px;font-weight:700}
.rt-ring{position:relative;width:min(100%,168px);aspect-ratio:1}
.rt-ring svg{width:100%;height:100%;transform:rotate(135deg)}
.rt-ring circle{fill:none;stroke-width:8;stroke-linecap:round}
.rt-ring .rb{stroke:var(--line);stroke-dasharray:75 100}
.rt-down .rf{stroke:var(--accent-2)}.rt-up .rf{stroke:var(--up)}.rt-jit .rf{stroke:var(--warn)}
.rt-v{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.rt-v b{font:600 clamp(22px,4.5vw,34px)/1.1 var(--font-display);font-variant-numeric:tabular-nums}
.rt-v small{font-size:12px;color:var(--muted)}
.res-share{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px;font-size:14px;color:var(--muted)}
.res-share>span{margin-right:2px}
.sh{display:inline-flex;align-items:center;height:32px;padding:0 12px;border:1px solid var(--line);border-radius:16px;color:var(--text);text-decoration:none;font-size:13px;font-weight:500}
.sh:hover{border-color:var(--muted)}
.sh-link{width:32px;padding:0;justify-content:center}
.sh-link svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
.res-msg{min-height:1.2em;margin-top:-18px;font-size:13px;color:var(--accent)}
.res-bad{color:var(--muted);text-align:center}
.res-cta{padding:14px 34px;font-size:16px}
@media (max-width:560px){
  .res-card{margin:4px auto 28px;padding:20px 14px 24px;gap:20px;border-radius:16px}
  .rp b{font-size:20px}.rp small{font-size:10.5px}
  .rp-l{flex-basis:100%;text-align:center}
  .rt-l{font-size:13px}
  .res-cta{align-self:stretch}
}

/* one-time M-Lab consent (shown only when Cloudflare is unavailable) */
.mlab-ask{max-width:520px;margin:6px auto 4px;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface);text-align:center;font-size:14px;line-height:1.45}
.mlab-ask[hidden]{display:none}
.mlab-ask p{margin:0 0 6px}
.mlab-ask a{color:var(--muted);font-size:13px}
.mlab-ask .actions{margin-top:12px;display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
.mlab-ask{width:100%;box-sizing:border-box;align-self:center}
@media (min-width:900px){
  .test > .mlab-ask{grid-column:1/-1;grid-row:4;justify-self:center;margin:0 0 14px}
  .test > .modes ~ .mlab-ask{grid-row:6}
}
.opt-grid .opt-srv{grid-column:1/-1}
@media (min-width:900px){.opt-grid{grid-template-columns:minmax(0,1.7fr) repeat(4,minmax(0,1fr))}.opt-grid .opt-srv{grid-column:auto}}
.dlg{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:16px;background:rgba(0,0,0,.6)}
.dlg[hidden]{display:none}
.dlg-box{width:100%;max-width:440px;padding:22px 20px 18px;border:1px solid var(--line);border-radius:16px;background:var(--surface);text-align:center;font-size:14px;line-height:1.5;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.dlg-box h2{margin:0 0 10px;font-size:18px}
.dlg-box p{margin:0 0 8px}
.dlg-box a{color:var(--muted);font-size:13px}
.dlg-box .actions{margin-top:16px;display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
body.dlg-open{overflow:hidden}
.sc-svg{position:relative}
.sc-hit{fill:transparent;cursor:pointer}
.sc-guide{stroke:var(--muted);stroke-width:1;stroke-dasharray:3 3}
.sc-tip{position:absolute;z-index:5;min-width:170px;padding:8px 10px;border:1px solid var(--line);border-radius:10px;background:var(--surface);box-shadow:0 8px 24px rgba(0,0,0,.45);font-size:13px;line-height:1.5;pointer-events:none}
.sc-tip[hidden]{display:none}
.sc-tip b{display:block;margin-bottom:3px;font-weight:600;color:var(--muted);font-size:12px}
.sc-tip span{display:flex;align-items:center;gap:7px}
.sc-tip span::before{content:"";width:9px;height:9px;border-radius:50%;flex:none}
.sc-tip i{font-style:normal;font-weight:700;margin-left:auto;padding-left:12px;font-variant-numeric:tabular-nums}
.sc-tip .tp-down::before{background:var(--accent-2)}.sc-tip .tp-up::before{background:var(--up)}
.sc-tip .tp-ping::before{background:#7d8794}.sc-tip .tp-jit::before{background:#e3e7ec}
.last-share{margin:4px auto 26px;text-align:center}
.last-share[hidden]{display:none}
.last-share .res-msg{margin:8px 0 0;min-height:18px}
/* brand-colored share buttons */
.sh[class*="sh-"]:not(.sh-link){gap:6px;border:0;color:#fff;font-weight:600;transition:filter .15s}
.sh[class*="sh-"]:not(.sh-link):hover{filter:brightness(1.12)}
.sh svg{width:16px;height:16px;flex:none}
.sh-tg{background:#229ed9}.sh-wa{background:#25d366}.sh-vk{background:#0077ff}
.sh-max{background:linear-gradient(135deg,#00bfff,#471aff 55%,#9500ff)}
.sh-x{background:#000;box-shadow:inset 0 0 0 1px #3a4048}.sh-fb{background:#1877f2}.sh-mail{background:#5d6977}
/* icon-only round share buttons */
.sh[class*="sh-"]:not(.sh-link){width:36px;height:36px;padding:0;justify-content:center;border-radius:50%}
.sh[class*="sh-"]:not(.sh-link) svg{width:18px;height:18px}
.sh-link{width:36px;height:36px}
.sh svg text{font:800 10px/1 system-ui,-apple-system,Segoe UI,Arial,sans-serif;fill:currentColor}
.sh:not(.sh-link) svg path:not([fill]){fill:currentColor}

@media (min-width:900px){.test > .conn.no-srv div:nth-child(3){grid-column:1 / -1}}