:root{
  --bg:#fafaf9;--surface:#fff;--surface2:#f3f4f2;--fg:#17201f;--mut:#5b6663;--line:#dde2df;
  --accent:#0f766e;--accent-soft:#d9f0ec;--on-accent:#fff;--ok:#15803d;--ok-soft:#dcf5e3;--bad:#b91c1c;--bad-soft:#fde3e3;--warn:#a16207;--warn-soft:#fbf0cf;
  --c-base:#8a948f;--c-an:#5b6fd6;--c-tb:#0f766e;--heat:185,28,28;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;--r:12px;
}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){
  --bg:#0e1413;--surface:#161d1c;--surface2:#1d2625;--fg:#e8efed;--mut:#98a5a1;--line:#2b3634;
  --accent:#2dd4bf;--accent-soft:#12312e;--on-accent:#04201d;--ok:#4ade80;--ok-soft:#10301c;--bad:#f87171;--bad-soft:#3a1717;--warn:#fbbf24;--warn-soft:#352a0b;
  --c-base:#7c8782;--c-an:#8b9bf0;--c-tb:#2dd4bf;--heat:248,113,113}}
[data-theme=dark]{--bg:#0e1413;--surface:#161d1c;--surface2:#1d2625;--fg:#e8efed;--mut:#98a5a1;--line:#2b3634;--accent:#2dd4bf;--accent-soft:#12312e;--on-accent:#04201d;--ok:#4ade80;--ok-soft:#10301c;--bad:#f87171;--bad-soft:#3a1717;--warn:#fbbf24;--warn-soft:#352a0b;--c-base:#7c8782;--c-an:#8b9bf0;--c-tb:#2dd4bf;--heat:248,113,113}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:15.5px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif}
.wrap{max-width:1180px;margin:0 auto;padding:28px 20px 40px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:8px;background:var(--surface);padding:8px 12px;z-index:50;border-radius:8px}
code,.mono{font-family:var(--mono);font-size:.86em}
code{background:var(--surface2);padding:1px 6px;border-radius:5px}
h1,h2,h3{line-height:1.2;margin:0}
a{color:var(--accent)}
button{font:inherit;color:inherit}
button:focus-visible,a:focus-visible,summary:focus-visible,.chip:focus-visible,li[tabindex]:focus-visible,input:focus-visible,[role=button]:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* top bar */
.top{position:sticky;top:0;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:30}
.bar{display:flex;align-items:center;gap:16px;height:54px;padding:0 20px;max-width:1440px;margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--fg);text-decoration:none;font-size:18px}
.views{display:flex;gap:2px;margin-left:10px}
.views button{border:0;background:none;color:var(--mut);padding:7px 14px;border-radius:8px;cursor:pointer;font-size:14.5px}
.views button:hover{background:var(--surface2);color:var(--fg)}.views button.on{background:var(--accent-soft);color:var(--accent);font-weight:600}
.right{margin-left:auto;display:flex;align-items:center;gap:10px}.gh{color:var(--mut);text-decoration:none;font-size:14px}
.theme{border:1px solid var(--line);background:var(--surface);border-radius:8px;width:34px;height:30px;cursor:pointer;font-size:16px}

.view{display:none}.view.on{display:block}

/* scoreboard */
.eyebrow{color:var(--accent);font-weight:600;font-size:13px;letter-spacing:.04em;text-transform:uppercase;margin:0 0 10px}
#view-score h1{font-size:clamp(30px,4.6vw,46px);letter-spacing:-.02em;margin-bottom:12px}
.lede{font-size:17.5px;max-width:780px;color:var(--mut);margin:0 0 22px}.lede strong{color:var(--fg)}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px}
.stat .big{font-size:34px;font-weight:700;letter-spacing:-.02em;line-height:1.1}.stat .lab{color:var(--mut);font-size:14px;margin-top:4px}
.stat .vs{font-size:13px;margin-top:8px;color:var(--mut)}.stat .vs b{color:var(--fg)}
.fine{font-size:13px;color:var(--mut);margin:12px 0 0;max-width:860px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:30px 0 8px}.sec-head h2{font-size:24px}
.sub{color:var(--mut);margin:4px 0 16px;max-width:820px}
.seg{display:inline-flex;background:var(--surface2);border:1px solid var(--line);border-radius:10px;padding:3px;gap:2px}
.seg button{border:0;background:transparent;color:var(--mut);padding:7px 14px;border-radius:8px;cursor:pointer;font-size:14px}
.seg button.on{background:var(--surface);color:var(--fg);box-shadow:0 1px 2px rgba(0,0,0,.12);font-weight:600}
.seg.small button{padding:4px 10px;font-size:13px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;margin:0}
.card h3{font-size:16px;margin-bottom:8px}
.chart-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
figcaption{font-weight:600;font-size:15px;margin-bottom:10px}.hint{font-weight:400;color:var(--mut);font-size:12.5px;margin-left:6px}
.bar-row{display:grid;grid-template-columns:150px 1fr 56px;align-items:center;gap:10px;margin:9px 0;font-size:14px}
.bar-row .track{background:var(--surface2);border-radius:6px;height:22px;overflow:hidden}.bar-row .fill{height:100%;border-radius:6px;min-width:2px;transition:width .6s}
.bar-row .val{font-variant-numeric:tabular-nums;font-weight:600;text-align:right}
.table-wrap{overflow-x:auto;margin-top:14px}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{border-bottom:1px solid var(--line);padding:9px 10px;text-align:left;vertical-align:top}
th{color:var(--mut);font-weight:600;font-size:12.5px;text-transform:uppercase;letter-spacing:.03em}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
tr.hl td{background:var(--accent-soft)}
.notes{color:var(--mut);font-size:13.5px;padding-left:18px;max-width:900px}.notes li{margin:4px 0}
.primary{background:var(--accent);color:var(--on-accent);border:0;border-radius:10px;padding:10px 18px;font-weight:700;cursor:pointer}

/* app layout */
.app{display:grid;grid-template-columns:260px minmax(0,1fr);gap:16px;max-width:1440px;margin:0 auto;padding:14px 20px 30px;align-items:start}
.side{position:sticky;top:68px;max-height:calc(100vh - 82px);display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.side-head{display:flex;justify-content:space-between;align-items:center;padding:10px 12px 0}
.filters{display:flex;flex-direction:column;gap:8px;padding:10px 12px;border-bottom:1px solid var(--line)}
.inc-list{list-style:none;margin:0;padding:4px;overflow:auto;flex:1}
.inc-list li{display:flex;align-items:center;gap:6px;padding:7px 9px;border-radius:8px;cursor:pointer;font-size:13.5px}
.inc-list li:hover{background:var(--surface2)}.inc-list li.sel{background:var(--accent-soft)}
.inc-list .id{font-family:var(--mono);font-weight:600}.inc-list .tags{margin-left:auto;display:flex;gap:4px}
.legend-note{font-size:11.5px;color:var(--mut);margin:0;padding:6px 12px 8px;border-top:1px solid var(--line)}
.dot{width:9px;height:9px;border-radius:50%;display:inline-block}.dot.ok{background:var(--ok)}.dot.bad{background:var(--bad)}
.pill{display:inline-flex;align-items:center;gap:5px;border-radius:999px;padding:2px 10px;font-size:12.5px;font-weight:600;border:1px solid var(--line);background:var(--surface2);color:var(--mut);white-space:nowrap}
.pill.ok{background:var(--ok-soft);color:var(--ok);border-color:transparent}.pill.bad{background:var(--bad-soft);color:var(--bad);border-color:transparent}.pill.warn{background:var(--warn-soft);color:var(--warn);border-color:transparent}.pill.acc{background:var(--accent-soft);color:var(--accent);border-color:transparent}
.work{min-width:0}
.work-head{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:10px}
.work-head h2{font-family:var(--mono);font-size:22px}
.btn{border:1px solid var(--line);background:var(--surface);padding:6px 12px;border-radius:8px;font-size:13.5px;cursor:pointer;text-decoration:none;color:var(--fg);display:inline-block}
.btn:hover{border-color:var(--accent)}
.truth{border:1px dashed var(--warn);background:var(--warn-soft);border-radius:var(--r);padding:10px 14px;font-size:14px;margin-bottom:10px}

/* stepper */
.stepper-wrap{position:sticky;top:54px;z-index:10;background:color-mix(in srgb,var(--bg) 94%,transparent);backdrop-filter:blur(6px);padding:8px 0 10px;display:flex;gap:12px;align-items:center;flex-wrap:wrap;border-bottom:1px solid var(--line);margin-bottom:14px}
.stepper{display:flex;gap:4px;flex:1;min-width:0;overflow-x:auto;padding:2px}
.step{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:6px 11px 6px 7px;cursor:pointer;font-size:13.5px;white-space:nowrap;color:var(--mut)}
.step .n{width:22px;height:22px;border-radius:50%;background:var(--surface2);display:grid;place-items:center;font-size:12px;font-weight:700}
.step.done .n{background:var(--accent-soft);color:var(--accent)}
.step.on{border-color:var(--accent);color:var(--fg);font-weight:600;box-shadow:0 0 0 2px var(--accent-soft)}.step.on .n{background:var(--accent);color:var(--on-accent)}
.ctl{display:flex;gap:6px;align-items:center}
.ctl-btn{width:34px;height:34px;border:1px solid var(--line);background:var(--surface);border-radius:9px;cursor:pointer;font-size:20px;line-height:1}
.play{border:0;background:var(--accent);color:var(--on-accent);padding:8px 14px;border-radius:9px;font-weight:700;cursor:pointer;white-space:nowrap}
.play.playing{background:var(--warn-soft);color:var(--warn)}

/* pane */
.pane{min-height:360px;outline:none}
.pane>*{animation:rise .35s ease both}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.pane h3.step-title{font-size:20px;margin-bottom:4px}
.step-sub{color:var(--mut);margin:0 0 14px;max-width:780px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.stack>*+*{margin-top:14px}
.counters{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.counter{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:12px 14px}
.counter b{display:block;font-size:28px;letter-spacing:-.02em;font-variant-numeric:tabular-nums}.counter span{color:var(--mut);font-size:13px}
pre.raw{background:var(--surface2);border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin:0;overflow:auto;font-size:11.5px;line-height:1.5;max-height:230px;white-space:pre-wrap;word-break:break-all}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.chip{font-family:var(--mono);font-size:12px;border:1px solid var(--line);background:var(--surface2);color:var(--fg);padding:2px 8px;border-radius:6px;cursor:pointer}
.chip[aria-expanded=true]{border-color:var(--accent);background:var(--accent-soft)}.chip.unknown{border-color:var(--bad);color:var(--bad)}
.rec{font-family:var(--mono);font-size:12px;background:var(--surface2);border-left:3px solid var(--accent);padding:6px 10px;margin-top:6px;border-radius:0 6px 6px 0;word-break:break-word;animation:rise .25s both}
.kv{display:grid;grid-template-columns:auto 1fr;gap:3px 12px;font-size:13.5px}.kv dt{color:var(--mut)}.kv dd{margin:0}
.meter{height:10px;background:var(--surface2);border-radius:5px;overflow:hidden}.meter>i{display:block;height:100%;background:var(--accent);width:0;transition:width .8s}
.bar2{display:grid;grid-template-columns:150px 1fr 64px;gap:8px;align-items:center;font-size:13px;margin:6px 0}
.rc{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center}.rc .cat{font-family:var(--mono);font-weight:700;font-size:17px}
.chain{list-style:none;margin:0;padding:0;counter-reset:s}
.chain>li{counter-increment:s;position:relative;padding:10px 0 10px 40px;border-bottom:1px solid var(--line);animation:rise .4s both}
.chain>li:last-child{border-bottom:0}
.chain>li::before{content:counter(s);position:absolute;left:0;top:10px;width:26px;height:26px;border-radius:50%;background:var(--surface2);display:grid;place-items:center;font-size:12.5px;font-weight:700;color:var(--mut)}
.rows .row{display:grid;grid-template-columns:34px 1.1fr 1.2fr 2fr;gap:10px;padding:10px 6px;border-bottom:1px solid var(--line);cursor:pointer;border-radius:8px;align-items:start}
.rows .row:hover{background:var(--surface2)}.rows .row.sel{background:var(--accent-soft)}
.cand-detail{padding:6px 6px 10px 44px;border-bottom:1px solid var(--line)}
pre{background:var(--surface2);padding:8px 10px;border-radius:8px;overflow:auto;font-size:12px;margin:6px 0 0}
.evt-table td{padding:6px 10px;font-size:13px}.evt-table td.t{font-family:var(--mono);font-variant-numeric:tabular-nums}
.evt-table tr.moved td{background:var(--warn-soft)}
.node{cursor:pointer}.node rect{transition:stroke .2s}
.graph{width:100%;max-width:760px;display:block;margin:0 auto}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:12.5px;color:var(--mut);margin-top:8px}.legend i{display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:5px;vertical-align:-1px}
details>summary{cursor:pointer;color:var(--accent);font-size:13px}
.hintbar{background:var(--accent-soft);border-radius:var(--r);padding:10px 14px;margin-bottom:12px;font-size:14px;display:flex;gap:10px;align-items:center;justify-content:space-between}
.hintbar button{border:0;background:none;cursor:pointer;color:var(--mut);font-size:18px}

/* scrubber */
.scrub{margin-top:16px}
.scrub h3 .hint{margin-left:8px}
svg text{font-family:system-ui,sans-serif;fill:var(--mut);font-size:11px}svg .lane-label{fill:var(--fg);font-size:12px;font-weight:600}
.tl-wrap{overflow-x:auto}
.scrub input[type=range]{width:100%;accent-color:var(--accent);margin:6px 0 2px}
.readout{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:8px}
.ro{border:1px solid var(--line);border-radius:10px;padding:8px 10px;font-size:12.5px;background:var(--surface2)}
.ro b{display:block;font-size:13px;margin-bottom:2px}.ro.bad{border-color:var(--bad)}.ro span{color:var(--mut)}
.arch svg{width:100%;height:auto}.arch [role=button]{cursor:pointer}.arch [role=button]:hover rect{stroke-width:3}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:14px}.cols ul{margin:0;padding-left:18px;color:var(--mut);font-size:14.5px}.cols li{margin:5px 0}
.foot{padding:24px 20px 50px;color:var(--mut);font-size:13px;border-top:1px solid var(--line);text-align:center}
.empty{color:var(--mut)}
@media(max-width:980px){.app{grid-template-columns:1fr}.side{position:static;max-height:300px}.grid2,.chart-grid,.cols,.stats{grid-template-columns:1fr}.counters,.readout{grid-template-columns:1fr 1fr}.rows .row{grid-template-columns:30px 1fr}.rows .row>:nth-child(n+3){grid-column:2}.bar-row{grid-template-columns:110px 1fr 52px}.views button{padding:6px 9px}.gh{display:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

/* ---- The outage (failure-first story) ---- */
.story-top{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:24px;align-items:start;margin-bottom:18px}
.story-ctl{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.prov{display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:.04em;border-radius:6px;padding:4px 10px;border:1.5px solid}
.prov.live{color:var(--ok);border-color:var(--ok);background:var(--ok-soft)}.prov.rec{color:var(--warn);border-color:var(--warn);background:var(--warn-soft)}
.provline{font-size:13.5px;color:var(--mut);border-left:3px solid var(--line);padding:2px 0 2px 12px;margin:0 0 16px;max-width:900px}
.chk{font-size:13.5px;color:var(--mut);display:flex;gap:8px;align-items:flex-start}
.act{margin:0 0 18px}.act-head{display:flex;align-items:center;gap:12px;margin-bottom:8px}.act-head h2{font-size:21px;margin:0}
.act-n{width:30px;height:30px;border-radius:50%;background:var(--accent);color:var(--on-accent);display:inline-flex;align-items:center;justify-content:center;font-weight:800}
.act-lede{margin:0 0 12px;max-width:860px}.act-actions{display:flex;gap:10px;flex-wrap:wrap;margin:6px 0 22px}
.big-spark{margin:6px 0 0}.minis{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.mini-h{display:flex;justify-content:space-between;gap:6px;font-size:13px;margin-bottom:3px}
.raw{background:var(--surface2);border:1px solid var(--line);border-radius:8px;padding:12px;max-height:340px;overflow:auto;font-size:12.5px;white-space:pre-wrap;word-break:break-word}
.stages{margin:12px 0 0;padding-left:20px}.stages li{margin:5px 0}
.honest{margin-top:12px;border:1.5px solid var(--warn);background:var(--warn-soft);border-radius:10px;padding:10px 14px}.honest.ok{border-color:var(--ok);background:var(--ok-soft)}
.story-err{color:var(--bad);font-weight:600}.tally{font-size:14px;color:var(--mut);max-width:860px}.empty-card{max-width:760px}
@media(max-width:860px){.story-top{grid-template-columns:1fr}.minis{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* ---- Second topology view ---- */
.t2top{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:16px;margin:16px 0}
.t2r{fill:var(--surface2);stroke:var(--line);stroke-width:1.5}.t2r.truthbox{stroke:var(--warn);stroke-width:3}.t2n text{font:600 14px system-ui;fill:var(--fg)}
.t2e{stroke:var(--mut);stroke-width:1.6}.t2c{font:12px system-ui;fill:var(--mut)}.t2m{font:700 12px system-ui}.t2m.truth{fill:var(--warn)}.t2m.ok{fill:var(--ok)}.t2m.bad{fill:var(--bad)}
.t2tab,.t2inc{width:100%;border-collapse:collapse;font-size:14px}.t2tab th,.t2tab td,.t2inc th,.t2inc td{padding:7px 10px;border-bottom:1px solid var(--line);text-align:left}.t2tab .num{text-align:right}
.t2inc tbody tr{cursor:pointer}.t2inc tbody tr:hover,.t2inc tbody tr.sel{background:var(--accent-soft)}
.t2ansrow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.t2ans{border:1px solid var(--line);border-radius:10px;padding:8px 12px}.t2ans b:first-child{display:block;font-size:13px;color:var(--mut);margin-bottom:3px}
.t2dia{margin-top:10px;max-width:640px}#t2detail{margin:14px 0 18px}
@media(max-width:860px){.t2top,.t2ansrow{grid-template-columns:1fr}}

/* polish: motion and dark finish (respects reduced motion) */
.view.on{animation:viewin .45s cubic-bezier(.2,.8,.2,1)}
@keyframes viewin{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.card,.mini,.inc-list li{transition:border-color .2s,box-shadow .25s,transform .25s}
.card:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}
.inc-list li:hover{transform:translateX(2px)}
.views button{transition:background .2s,color .2s}
.gh.pres{background:var(--accent);color:var(--on-accent);padding:6px 12px;border-radius:8px;font-weight:600;text-decoration:none;margin-right:8px}
html{background:var(--bg)}
[data-theme=dark] body{min-height:100vh;background:radial-gradient(900px 500px at 10% -5%,rgba(45,212,191,.07),transparent 60%) fixed,var(--bg)}
@media(prefers-reduced-motion:reduce){.view.on{animation:none}*{transition-duration:.01s!important}}