/* oncallsim landing page. Tokens are the hub's ("NOC at 3 a.m.", ../design/DESIGN.md).
   Red is the pager badge only. Nothing animates; hovers change colour and border only. */

@font-face{font-family:"Archivo Narrow";font-weight:600;font-style:normal;font-display:swap;src:url("fonts/archivo-narrow-600.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:400;font-style:normal;font-display:swap;src:url("fonts/ibm-plex-sans-400.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:500;font-style:normal;font-display:swap;src:url("fonts/ibm-plex-sans-500.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:600;font-style:normal;font-display:swap;src:url("fonts/ibm-plex-sans-600.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:400;font-style:normal;font-display:swap;src:url("fonts/ibm-plex-mono-400.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:500;font-style:normal;font-display:swap;src:url("fonts/ibm-plex-mono-500.woff2") format("woff2")}

:root{
  --paper:#0E1116;
  --raised:#151A21;
  --raised-2:#1C232C;
  --slab:#0A0D11;
  --ink:#E6EBF0;
  --body:#C3CBD4;
  --muted:#8B97A5;
  --faint:#4E5A68;      /* strokes and rules only; never text */
  --dim:#7C8899;        /* tertiary text, ≥4.5:1 on every ground */
  --rule:#232B35;
  --rule-strong:#34404D;
  --accent:#F5B335;
  --accent-hi:#FFC657;
  --accent-ink:#14100A;
  --alert:#E5484D;
  --pass:#3DD68C;

  --display:"Archivo Narrow","Arial Narrow","Helvetica Neue",Arial,sans-serif;
  --sans:"IBM Plex Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;

  --radius:2px;
  --gutter:clamp(16px,4.5vw,64px);
  --bar-h:56px;
  --sec-gap:clamp(88px,11vw,160px);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--bar-h) + 24px);
  scrollbar-color:var(--rule-strong) var(--paper)}
body{margin:0;background:var(--paper);color:var(--body);font:400 17px/1.6 var(--sans);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
::selection{background:var(--accent);color:var(--accent-ink)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--paper)}
::-webkit-scrollbar-thumb{background:var(--rule-strong);border:2px solid var(--paper);border-radius:2px}
h1,h2,h3,p,figure,dl,dd,ol,ul,pre{margin:0;padding:0}
ol,ul{list-style:none}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--radius)}
code,pre,.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

.wrap{width:100%;max-width:1520px;margin-inline:auto;padding-inline:var(--gutter)}
.skip{position:absolute;left:var(--gutter);top:-60px;z-index:20;padding:8px 12px;background:var(--accent);color:var(--accent-ink);font-weight:600}
.skip:focus{top:8px}

/* ---------- LED mark ---------- */
.mark{width:20px;height:20px;flex:none;display:block}
.mark-slab{fill:var(--slab);stroke:var(--rule-strong)}
.mark-edge{fill:var(--accent)}
.mark-led{fill:var(--accent)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;height:40px;padding:0 16px;border:1px solid var(--rule-strong);
  border-radius:var(--radius);font:500 15px/1 var(--sans);color:var(--ink);white-space:nowrap;cursor:pointer;
  transition:background-color .15s ease-out,border-color .15s ease-out}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:600}
.btn-primary:hover{background:var(--accent-hi);border-color:var(--accent-hi)}
.btn-lg{height:52px;padding:0 22px;font-size:17px}
.btn-ghost{background:transparent}
.btn-ghost:hover{border-color:var(--accent);background:var(--raised)}
.lbl-short{display:none}

/* ---------- sticky bar ---------- */
.top-sentinel{position:absolute;top:0;height:1px;width:1px}
.bar{position:sticky;top:0;z-index:10;height:var(--bar-h);background:var(--paper);border-bottom:1px solid transparent;
  transition:background-color .2s ease-out,border-color .2s ease-out}
.bar.scrolled{background:rgba(14,17,22,.86);border-bottom-color:var(--rule);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
.bar-in{height:100%;display:flex;align-items:center;gap:36px}
.brand{display:inline-flex;align-items:center;gap:10px;font:600 21px/1 var(--display);letter-spacing:.01em;color:var(--ink)}
.brand-sm{font-size:17px}
.links{display:flex;gap:28px;margin-left:auto;height:100%}
.links a{display:flex;align-items:center;height:100%;font-size:15px;font-weight:500;color:var(--muted);
  border-bottom:2px solid transparent;margin-bottom:-1px;transition:color .15s ease-out,border-color .15s ease-out}
.links a:hover{color:var(--ink);border-bottom-color:var(--accent)}
.bar-ctas{display:flex;align-items:center;gap:10px}
.btn-bar{height:36px;font-size:14px}

/* ---------- hero ---------- */
.hero{padding-block:clamp(56px,8vw,120px) clamp(72px,9vw,136px);overflow:hidden}
.hero-in{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(32px,4vw,72px);align-items:center}
.hero-copy{position:relative;z-index:2}
h1{font:600 clamp(46px,5.4vw,84px)/.98 var(--display);letter-spacing:-.012em;color:var(--ink);text-wrap:balance}
.lede{margin-top:28px;max-width:34em;font-size:clamp(17px,1.35vw,20px);line-height:1.55;color:var(--body);text-wrap:pretty}
.cta-row{margin-top:40px;display:flex;flex-wrap:wrap;align-items:center;gap:14px 20px}
.micro{font-size:14px;color:var(--muted)}

/* the incident: a drawn Grafana panel with the pager on top */
.incident{position:relative;display:grid;margin-right:calc(-1 * var(--gutter))}
.panel-g{position:relative;background:var(--raised);border:1px solid var(--rule);border-right:0;
  border-radius:var(--radius) 0 0 var(--radius);padding:14px 0 56px 56px;justify-self:end;width:62%}
.panel-g-head{display:flex;align-items:baseline;gap:20px;padding-right:24px;margin-bottom:6px}
.pg-title{font:500 13px var(--sans);color:var(--ink)}
.pg-legend{margin-left:auto;display:flex;align-items:center;gap:8px;font:400 12px var(--mono);color:var(--muted)}
.sw{display:inline-block;width:14px;height:0;border-top:2px solid var(--accent)}
.sw-thr{border-top:1px dashed var(--muted);margin-left:10px}
.graph{display:block;width:100%;height:clamp(170px,18vw,264px);overflow:visible}
.gl line{stroke:var(--rule);stroke-width:1;vector-effect:non-scaling-stroke}
.thr{stroke:var(--muted);stroke-dasharray:5 5;stroke-width:1;vector-effect:non-scaling-stroke}
.firing{fill:var(--accent);fill-opacity:.07}
.fire-mark{stroke:var(--accent);stroke-width:1;stroke-dasharray:2 3;vector-effect:non-scaling-stroke}
.area{fill:var(--accent);fill-opacity:.06}
.line{fill:none;stroke:var(--accent);stroke-width:2;stroke-linejoin:round;vector-effect:non-scaling-stroke}
.plot{position:relative}
/* the panel is narrow on mid widths: thin the ticks, drop the legend */
.panel-g{container-type:inline-size}
@container (max-width:600px){
  .pg-legend{display:none}
  .axis-x span:nth-child(even){visibility:hidden}
}
.axis-y{position:absolute;left:-52px;width:44px;top:calc(32/440*100%);bottom:calc(36/440*100%);
  display:flex;flex-direction:column;justify-content:space-between;font:400 11px var(--mono);color:var(--dim);text-align:right;white-space:nowrap}
.axis-y span{line-height:0}
.axis-y .on{color:var(--muted)}
.axis-x{position:absolute;left:calc(48/820*100%);right:calc(28/820*100%);top:calc(100% + 12px);display:flex;justify-content:space-between;
  font:400 11px var(--mono);color:var(--dim)}
.axis-x span{width:0;display:flex;justify-content:center;white-space:nowrap}
.axis-x span:first-child{justify-content:flex-start}
.axis-x span:last-child{justify-content:flex-end}
.fire-label{position:absolute;top:calc(32/440*100% + 8px);right:calc(77.6/820*100% + 8px);font:500 11px var(--mono);color:var(--accent);white-space:nowrap}

.pager{position:relative;z-index:3;justify-self:start;width:min(500px,62%);margin-top:-16px;
  display:flex;flex-direction:column;gap:12px;padding:20px 22px 18px;background:var(--slab);
  border:1px solid var(--rule-strong);border-top:2px solid var(--accent);border-radius:var(--radius);
  box-shadow:0 24px 48px -12px rgba(0,0,0,.65),0 2px 6px rgba(0,0,0,.4)}
.pager-row{display:flex;align-items:center;gap:12px}
.badge{display:inline-flex;align-items:center;height:22px;padding:0 9px;border-radius:var(--radius);background:var(--alert);color:#fff;
  font:600 11.5px var(--mono);letter-spacing:.12em;text-transform:uppercase}
.fired{margin-left:auto;display:flex;align-items:center;gap:8px;font:500 13px var(--mono);color:var(--muted)}
.pager-name{font:500 clamp(20px,1.9vw,26px)/1.2 var(--mono);color:var(--ink);letter-spacing:-.01em}
.pager-sum{font-size:15px;color:var(--body)}
.pager-expr{font:400 11.5px var(--mono);color:var(--dim);
  padding-top:12px;border-top:1px solid var(--rule)}

/* ---------- sections ---------- */
.sec{padding-top:var(--sec-gap)}
.sec-head{display:flex;align-items:baseline;gap:20px;margin-bottom:clamp(36px,4vw,56px)}
.sec-head hr{flex:1;border:0;border-top:1px solid var(--rule);align-self:center;margin:0}
.sec-note{font-size:14px;color:var(--dim);white-space:nowrap}
h2{font:600 clamp(34px,3.6vw,52px)/1 var(--display);letter-spacing:.015em;text-transform:uppercase;color:var(--ink);text-wrap:balance}

/* how it works */
.stages{display:grid;grid-template-columns:minmax(0,1fr) 44px minmax(0,1fr) 44px minmax(0,1fr);gap:0 clamp(8px,1vw,16px)}
.stage{display:flex;flex-direction:column}
.stage h3{display:flex;align-items:baseline;gap:12px;margin-top:28px;font:600 30px/1 var(--display);
  letter-spacing:.015em;text-transform:uppercase;color:var(--ink)}
.st-no{font:500 15px var(--mono);color:var(--accent)}
.stage > p{margin-top:12px;max-width:30em;color:var(--body);text-wrap:pretty}
.stage .passes{margin-top:auto;padding-top:18px;font:400 13px/1.5 var(--mono);color:var(--muted)}
.passes span{display:block;color:var(--dim);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:2px}
.arrow{align-self:start;display:flex;align-items:center;justify-content:center;height:220px}
.arrow svg{width:32px;height:16px;fill:none;stroke:var(--faint);stroke-width:1.5}

.vig{height:220px;border:1px solid var(--rule);border-radius:var(--radius);overflow:hidden;font:400 12px/1.5 var(--mono);
  font-variant-numeric:tabular-nums;color:var(--muted)}
/* trace waterfall */
.vig-trace{background:var(--raised);padding:14px 16px;display:flex;flex-direction:column;gap:7px}
.tr-root,.tr-child{display:grid;grid-template-columns:minmax(0,12.5em) minmax(0,1fr) auto;align-items:center;gap:10px}
.tr-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tr-root .tr-name{color:var(--ink)}
.tr-child .tr-name{padding-left:12px;color:var(--muted)}
.tr-bar{position:relative;height:8px}
.tr-bar::before{content:"";position:absolute;inset:0 auto 0 var(--o,0);width:var(--w,100%);background:var(--accent);opacity:.75;border-radius:1px}
.b1{--o:6%;--w:9%}.b2{--o:17%;--w:10%}.b3{--o:29%;--w:8%}.b4{--o:39%;--w:11%}
.tr-bar-root::before{background:var(--rule-strong);opacity:1}
.tr-dur{color:var(--ink)}
.tr-more{padding-left:12px;color:var(--dim)}
.picks{margin-top:auto;display:flex;flex-wrap:wrap;gap:8px}
.pick{display:inline-flex;align-items:center;gap:8px;height:26px;padding:0 10px;border:1px solid var(--accent);border-radius:var(--radius);color:var(--ink)}
.pick b{font-weight:400;color:var(--muted)}
/* terminal */
.vig-term{background:var(--slab);padding:16px 18px}
.vig-term pre{font:inherit;white-space:pre;overflow:hidden;color:var(--body)}
.vig-term .p{color:var(--dim)}
.vig-term .r{color:var(--dim)}
.vig-term .ok{color:var(--pass);font-weight:500}
/* replay report */
.vig-replay{background:var(--raised);padding:14px 16px;display:flex;flex-direction:column;gap:12px}
.rp-head{display:flex;justify-content:space-between;gap:12px;color:var(--muted)}
.rp-t{color:var(--ink)}
.rp-prog{height:4px;background:var(--rule)}
.rp-prog i{display:block;height:100%;width:100%;background:var(--pass)}
.rp-verdict{display:flex;align-items:baseline;gap:12px;color:var(--muted)}
.quiet{font:600 26px/1 var(--display);letter-spacing:.04em;text-transform:uppercase;color:var(--pass)}
.rp-stats{margin-top:auto;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--rule)}
.rp-stats div{padding-top:10px}
.rp-stats div + div{padding-left:12px;border-left:1px solid var(--rule)}
.rp-stats dt{font-size:11px;color:var(--dim)}
.rp-stats dd{font:500 15px var(--mono);color:var(--ink);white-space:nowrap}

.par{margin-top:clamp(40px,4vw,56px);padding-top:20px;border-top:1px solid var(--rule);color:var(--muted);font-size:16px}

/* who it's for: a ledger */
.who h2{margin-bottom:clamp(36px,4vw,56px)}
.ledger{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 clamp(24px,3vw,48px);border-top:1px solid var(--rule-strong)}
.ledger > div{display:flex;flex-direction:column;gap:14px;padding-top:24px}
.ledger dt{font:500 13px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.ledger dd{font-size:clamp(19px,1.6vw,23px);line-height:1.45;color:var(--ink);text-wrap:pretty}

/* FAQ: the emphasised section */
.faq{padding-top:var(--sec-gap)}
.faq-in{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:clamp(32px,4vw,72px);align-items:start}
.faq-side{position:sticky;top:calc(var(--bar-h) + 40px)}
.faq-side h2{font-size:clamp(40px,4.4vw,68px);line-height:.98}
.qa{border-top:1px solid var(--rule-strong)}
.qa details{border-bottom:1px solid var(--rule)}
.qa summary{display:flex;align-items:center;gap:20px;padding:24px 4px 24px 0;cursor:pointer;list-style:none;
  font:600 clamp(22px,2vw,28px)/1.15 var(--display);letter-spacing:.005em;color:var(--ink);transition:color .15s ease-out}
.qa summary::-webkit-details-marker{display:none}
.qa summary:hover{color:var(--accent)}
.qa summary:focus-visible{outline-offset:-2px}
.tw{margin-left:auto;width:16px;height:16px;flex:none;fill:none;stroke:var(--muted);stroke-width:1.6;transition:transform .2s cubic-bezier(.2,.7,.2,1)}
.qa details[open] .tw{transform:rotate(180deg);stroke:var(--accent)}
.qa .a{padding:0 48px 28px 0;max-width:44em;color:var(--body)}
.qa .a p + ul{margin-top:14px}
.incidents li{display:grid;grid-template-columns:minmax(0,15em) minmax(0,1fr) auto;gap:6px 20px;align-items:baseline;
  padding-block:12px;border-top:1px solid var(--rule)}
.incidents b{font-weight:500;color:var(--ink)}
.incidents span{color:var(--body)}
.incidents code{font-size:13px;color:var(--muted)}

/* closing band */
.close{margin-top:var(--sec-gap);background:var(--slab);border-top:2px solid var(--accent);border-bottom:1px solid var(--rule)}
.close-in{display:flex;align-items:flex-end;justify-content:flex-start;gap:32px clamp(48px,7vw,112px);padding-block:clamp(64px,8vw,112px)}
.close h2{max-width:7.8em;font-size:clamp(38px,4.6vw,72px);line-height:.98;text-transform:none;letter-spacing:-.01em}
.close .cta-row{flex:none;margin-top:0;padding-bottom:4px;gap:12px}
.close .micro{flex-basis:100%;margin-top:4px}

/* footer */
.foot-in{display:flex;align-items:center;gap:28px;padding-block:28px;font-size:14px;color:var(--dim)}
.contact{color:var(--muted);border-bottom:1px solid var(--rule-strong)}
.contact:hover{color:var(--ink);border-bottom-color:var(--accent)}
.copy{margin-left:auto;font-family:var(--mono);font-size:13px}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .hero-in{grid-template-columns:minmax(0,1fr)}
  .hero-copy{max-width:40em}
  .incident{margin-left:0}
  .panel-g{width:82%}
  .pager{width:min(500px,70%)}
  .close-in{flex-direction:column;align-items:flex-start}
  .stages{grid-template-columns:minmax(0,1fr);gap:0}
  .arrow{height:56px;justify-content:flex-start;padding-left:24px}
  .arrow svg{transform:rotate(90deg)}
  .stage .passes{margin-top:0}
  .vig{max-width:560px}
  .faq-in{grid-template-columns:minmax(0,1fr);gap:32px}
  .ledger{grid-template-columns:minmax(0,1fr);border-top:0}
  .ledger > div{gap:8px;padding-block:22px;border-top:1px solid var(--rule)}
  .faq-side{position:static}
}
@media (max-width:640px){
  :root{--bar-h:52px}
  body{font-size:16px}
  .links{display:none}
  .bar-in{justify-content:space-between}
  .btn-bar{height:34px;padding:0 12px}
  .bar-ctas{gap:8px}
  .lbl-full{display:none}
  .lbl-short{display:inline}
  .panel-g{padding:12px 0 52px 50px}
  .axis-y{left:-46px;width:40px;font-size:9.5px}
  .axis-x{font-size:10px}
  .axis-x span:nth-child(even){visibility:hidden}
  .pg-legend{display:none}
  .panel-g{width:100%}
  .pager{width:auto;justify-self:stretch;margin:-16px var(--gutter) 0 12px}
  .stage h3{font-size:26px}
  .vig{height:auto;min-height:200px}
  .arrow{height:44px}
  .qa summary{padding-block:20px}
  .qa .a{padding-right:0}
  .incidents li{grid-template-columns:minmax(0,1fr) auto}
  .incidents span{grid-column:1 / -1;grid-row:2}
  .close-in{flex-direction:column;align-items:flex-start}
  .foot-in{flex-wrap:wrap;gap:12px 20px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none !important}
}