:root{
  --r-paper:#FAF8F4;
  --r-panel:#FFFFFF;
  --r-sand:#F1EDE4;
  --r-ink:#1A1A18;
  --r-body:#3D3D39;
  --r-muted:#6B6861;      
  --r-rule:#DCD7CC;
  --r-teal:#1F6E78;
  --r-teal-br:#6FD3DE;    
  --r-teal-soft:#E3EFF0;
  --r-rust:#C0432F;
  --r-rust-ink:#A93A29;   
  --r-rust-soft:#F7E7E3;
  --r-measure:720px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
.rbody{
  margin:0;background:var(--r-paper);color:var(--r-body);
  font-family:"IBM Plex Sans",-apple-system,Segoe UI,Helvetica,Arial,sans-serif;
  font-size:17px;line-height:1.62;-webkit-font-smoothing:antialiased;
}
.rbody a{color:inherit}
img{max-width:100%}
:focus-visible{outline:2px solid var(--r-teal);outline-offset:3px}
.rvh{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}


.rtop{
  position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:20px;
  padding:0 28px;height:58px;background:color-mix(in srgb,var(--r-paper) 94%,transparent);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--r-rule);
}
.rtop-back{
  font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--r-muted);
  text-decoration:none;flex:0 0 auto;
}
.rtop-back:hover{color:var(--r-ink)}
.rtop-back::before{content:"\2190\00a0"}
.rtop-title{
  flex:1 1 auto;text-align:center;font-family:"Source Serif 4",Georgia,serif;
  font-size:.95rem;color:var(--r-ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.rtop-actions{display:flex;gap:8px;flex:0 0 auto}
.rtop-btn{
  font-family:"IBM Plex Sans",sans-serif;font-size:.8rem;color:var(--r-ink);
  background:transparent;border:1px solid var(--r-rule);border-radius:5px;
  padding:7px 13px;cursor:pointer;text-decoration:none;
}
.rtop-btn:hover{border-color:var(--r-teal);color:var(--r-teal)}

.rprogress{position:sticky;top:58px;z-index:39;height:2px;background:var(--r-rule)}
.rprogress span{display:block;height:100%;background:var(--r-teal)}


.rcontents{
  display:none;position:sticky;top:60px;z-index:38;
  background:var(--r-panel);border-bottom:1px solid var(--r-rule);
  padding:22px 28px;
}
.rcontents.is-open{display:block}
.rcontents ol{
  list-style:none;margin:0 auto;padding:0;max-width:900px;
  display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:2px;
}
.rcontents a{
  display:grid;grid-template-columns:auto 1fr;gap:4px 12px;
  padding:11px 12px;text-decoration:none;border-radius:5px;
}
.rcontents a:hover{background:var(--r-sand)}
.rcontents li.is-here a{background:var(--r-teal-soft)}
.rcontents-n{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--r-muted);grid-row:1/3}
.rcontents-t{font-family:"Source Serif 4",Georgia,serif;font-size:1rem;color:var(--r-ink)}
.rcontents-s{font-size:.8rem;color:var(--r-muted);line-height:1.4}


.rmain{max-width:960px;margin:0 auto;padding:52px 28px 0}
.rchapter-head{
  display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;
  padding-bottom:12px;border-bottom:1px solid var(--r-ink);margin-bottom:38px;
}
.rchapter-n{font-family:"IBM Plex Mono",monospace;font-size:.78rem;color:var(--r-ink);font-weight:600}
.rchapter-k{font-family:"IBM Plex Mono",monospace;font-size:.78rem;color:var(--r-muted)}
.rchapter-k::before{content:"\00b7\00a0"}
.rchapter-s{margin-left:auto;font-size:.78rem;color:var(--r-muted);font-family:"IBM Plex Mono",monospace}

.rtitle{
  font-family:"Source Serif 4",Georgia,serif;font-weight:400;
  font-size:clamp(2rem,4.2vw,3.1rem);line-height:1.14;color:var(--r-ink);
  margin:0 0 26px;letter-spacing:-0.01em;text-wrap:balance;
}
.rtitle em{display:block;font-style:italic;color:var(--r-teal)}
.rlede{font-size:1.06rem;color:var(--r-body);max-width:var(--r-measure);margin:0 0 40px;text-wrap:pretty}
.rbodycopy{
  font-family:"Source Serif 4",Georgia,serif;font-size:1.24rem;line-height:1.5;
  color:var(--r-ink);max-width:var(--r-measure);margin:34px 0;
}


.rfig{margin:44px 0}
.rfig-cap{
  font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--r-muted);
  padding-bottom:10px;border-bottom:1px solid var(--r-ink);margin-bottom:18px;
}
.rfig-foot{font-size:.82rem;color:var(--r-muted);margin-top:16px;line-height:1.5}


.rbar{display:grid;grid-template-columns:auto 1fr 46px;gap:14px;align-items:center;padding:5px 0}
.rbar:has(.rbar-n){grid-template-columns:auto minmax(0,260px) 1fr 46px}
.rbar-n{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--r-muted)}
.rbar-label{font-size:.9rem;color:var(--r-ink);font-weight:500}
.rbar-track{background:var(--r-panel);border:1px solid var(--r-rule);height:22px;position:relative}
.rbar-fill{position:absolute;inset:0 auto 0 0;background:var(--r-teal)}
.rbar.is-hot .rbar-fill{background:var(--r-rust)}
.rbar-value{font-family:"IBM Plex Mono",monospace;font-size:.8rem;text-align:right;color:var(--r-ink);font-weight:600}


.rstacks{display:grid;grid-template-columns:1fr auto 1fr;gap:0;align-items:start}
.rstack-head{font-family:"IBM Plex Mono",monospace;font-size:.74rem;margin-bottom:10px;font-weight:600}
.rstack--system .rstack-head{color:var(--r-teal)}
.rstack--workaround .rstack-head{color:var(--r-rust)}
.rstack-row{
  display:flex;justify-content:space-between;gap:12px;align-items:center;
  background:var(--r-panel);border:1px solid var(--r-rule);padding:11px 14px;margin-bottom:6px;
  font-size:.9rem;color:var(--r-ink);
}
.rstack--system .rstack-row:first-of-type{background:var(--r-teal-soft);border-color:var(--r-teal)}
.rstack--workaround .rstack-row:first-of-type{background:var(--r-rust-soft);border-color:var(--r-rust)}
.rstack-v{font-family:"IBM Plex Mono",monospace;font-size:.8rem;color:var(--r-muted)}
.rstacks-gap{display:flex;align-items:center;justify-content:center;padding:0 22px;align-self:stretch}
.rstacks-gap span{
  writing-mode:vertical-rl;transform:rotate(180deg);
  font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--r-rust);
  border:1px dashed var(--r-rust);padding:12px 6px;
}


.rweek-days{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-bottom:8px}
.rweek-days span{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--r-muted)}
.rweek-lane{display:grid;grid-template-columns:130px 1fr;gap:18px;align-items:center}
.rweek-lane-label{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--r-ink);font-weight:600}
.rweek-lane-label em{display:block;font-style:normal;font-weight:400;color:var(--r-muted);font-size:.68rem;margin-top:2px}
.rweek-track{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.rweek-job{
  background:var(--r-teal-soft);border:1px solid var(--r-teal);padding:9px 10px;
  font-size:.78rem;color:var(--r-ink);
}
.rweek-job em{display:block;font-style:normal;font-size:.68rem;color:var(--r-muted);margin-top:2px}
.rweek-job--floor{background:var(--r-panel);border-style:dashed;border-color:var(--r-rust)}
.rweek-job--floor em{color:var(--r-rust)}
.rweek-job.is-broken{background:var(--r-rust);border-style:solid;color:#fff}
.rweek-job.is-broken em{color:rgba(255,255,255,.85)}
.rweek-seam{display:flex;align-items:center;gap:14px;padding:14px 0 14px 148px}
.rweek-seam::before,.rweek-seam::after{content:"";flex:1 1 auto;height:1px;background:var(--r-rust);opacity:.4}
.rweek-seam span{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--r-rust)}


.rcascade{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.rcascade-stage{display:flex;flex-direction:column;gap:8px}
.rcascade-time{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--r-muted)}
.rcascade-label{font-family:"Source Serif 4",Georgia,serif;font-size:1rem;color:var(--r-ink)}
.rcascade-node{position:relative;height:38px;display:flex;align-items:center}
.rcascade-node::before{content:"";position:absolute;left:0;right:-14px;top:50%;height:1px;background:var(--r-rule)}
.rcascade-stage:last-child .rcascade-node::before{right:0}
.rcascade-node span{
  position:relative;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  font-family:"IBM Plex Mono",monospace;font-size:.7rem;font-weight:600;
  background:color-mix(in srgb,var(--r-rust) calc(var(--heat) * 100%),var(--r-panel));
  border:1px solid color-mix(in srgb,var(--r-rust) calc(20% + var(--heat) * 80%),var(--r-rule));
  color:var(--r-ink);
}
.rcascade-stage:last-child .rcascade-node span{color:#fff}   
.rcascade-stage p{font-size:.78rem;color:var(--r-muted);line-height:1.45;margin:0}
.rspread{margin-top:34px;border:1px solid var(--r-rust);background:var(--r-rust-soft)}
.rspread-head{
  font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--r-rust-ink);
  padding:12px 16px;border-bottom:1px solid color-mix(in srgb,var(--r-rust) 35%,transparent);
}
.rspread-cols{display:grid;grid-template-columns:repeat(5,1fr)}
.rspread-cols > div{padding:14px 16px;border-right:1px solid color-mix(in srgb,var(--r-rust) 22%,transparent)}
.rspread-cols > div:last-child{border-right:0}
.rspread-cols strong{display:block;font-family:"IBM Plex Mono",monospace;font-size:.68rem;color:var(--r-rust-ink);margin-bottom:6px}
.rspread-cols span{font-size:.82rem;color:var(--r-ink)}


.rroi{
  position:relative;height:400px;border-left:1px solid var(--r-ink);border-bottom:1px solid var(--r-ink);
  margin:0 0 24px 90px;
}
.rroi-zone{
  position:absolute;left:58%;right:0;top:0;bottom:42%;
  background:var(--r-teal-soft);border:1px dashed var(--r-teal);
}
.rroi-zone span{
  position:absolute;top:8px;left:12px;font-family:"IBM Plex Mono",monospace;
  font-size:.7rem;color:var(--r-teal);
}
.rroi-y{
  position:absolute;left:-90px;top:50%;transform:rotate(-90deg) translateX(50%);transform-origin:right center;
  font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--r-muted);white-space:nowrap;
}
.rroi-x{
  position:absolute;left:0;right:0;bottom:-28px;text-align:center;
  font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--r-muted);
}
.rroi-dot{
  position:absolute;width:var(--d);height:var(--d);border-radius:50%;
  transform:translate(-50%,50%);display:grid;place-items:center;
  background:color-mix(in srgb,var(--r-teal) 34%,var(--r-paper));
  border:1px solid var(--r-teal);
}
.rroi-dot.is-best{background:var(--r-teal)}
.rroi-dot span{font-family:"IBM Plex Mono",monospace;font-size:.6rem;color:var(--r-ink)}
.rroi-dot.is-best span{color:#fff}
.rroi-key{list-style:none;margin:34px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:6px}
.rroi-key li{display:flex;gap:10px;font-size:.85rem;color:var(--r-muted);align-items:baseline}
.rroi-key li.is-best{color:var(--r-ink);font-weight:500}
.rroi-key-n{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--r-teal)}


.rloop{display:grid;grid-template-columns:1fr 1.1fr 1fr;gap:22px;align-items:center}
.rloop-col-head{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--r-muted);margin-bottom:10px}
.rloop-col--out{text-align:right}
.rloop-chip{background:var(--r-panel);border:1px solid var(--r-rule);padding:10px 13px;margin-bottom:7px}
.rloop-chip strong{display:block;font-family:"IBM Plex Mono",monospace;font-size:.82rem;color:var(--r-ink)}
.rloop-chip span{font-size:.72rem;color:var(--r-muted)}
.rloop-core{background:var(--r-ink);padding:20px;border-radius:6px}
.rloop-core-head{font-family:"IBM Plex Mono",monospace;font-size:.8rem;color:var(--r-teal-br);margin-bottom:14px}
.rloop-core-head em{display:block;font-style:normal;color:rgba(255,255,255,.6);font-size:.72rem}
.rloop-core-row{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:4px;
  padding:9px 12px;margin-bottom:7px;color:#fff;font-size:.85rem;font-weight:600;
}
.rloop-core-row span{display:block;font-weight:400;font-size:.72rem;color:rgba(255,255,255,.6)}
.rloop-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px;margin-top:30px}
.rloop-step{background:var(--r-panel);border:1px solid var(--r-rule);padding:16px 18px}
.rloop-step-n{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--r-teal)}
.rloop-step strong{display:block;font-family:"Source Serif 4",Georgia,serif;font-size:1.06rem;color:var(--r-ink);margin:6px 0 6px}
.rloop-step p{font-size:.8rem;color:var(--r-muted);margin:0;line-height:1.45}


.rstats{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px;margin:40px 0}
.rstats strong{
  display:block;font-family:"Source Serif 4",Georgia,serif;font-size:3rem;
  color:var(--r-rust);line-height:1;
}
.rstats span{display:block;font-size:.88rem;color:var(--r-muted);margin-top:8px}

.rcols{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:26px;margin:40px 0}
.rcol{border-top:1px solid var(--r-ink);padding-top:16px}
.rcol-n{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--r-rust);margin-bottom:10px}
.rcol h3{font-family:"Source Serif 4",Georgia,serif;font-weight:400;font-size:1.3rem;color:var(--r-ink);margin:0 0 12px;line-height:1.2}
.rcol p{font-size:.88rem;line-height:1.55;margin:0}
.rcol blockquote{
  margin:16px 0 0;padding-top:14px;border-top:1px solid var(--r-rule);
  font-family:"Source Serif 4",Georgia,serif;font-style:italic;font-size:.92rem;color:var(--r-ink);
}
.rcol cite{
  display:block;font-style:normal;font-family:"IBM Plex Mono",monospace;
  font-size:.68rem;color:var(--r-muted);margin-top:10px;
}

.rsignals{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin:34px 0}
.rsignal{background:var(--r-panel);border:1px solid var(--r-rule);padding:20px 22px}
.rsignal h3{font-family:"Source Serif 4",Georgia,serif;font-weight:400;font-size:1.15rem;color:var(--r-ink);margin:0 0 8px}
.rsignal p{font-size:.85rem;color:var(--r-muted);margin:0;line-height:1.5}

.rtable{margin:40px 0;border-top:1px solid var(--r-ink)}
.rtable-head{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--r-teal);padding:12px 0}
.rtable-row{
  display:grid;grid-template-columns:44px minmax(0,220px) 1fr;gap:16px;
  padding:16px 0;border-top:1px solid var(--r-rule);align-items:start;
}
.rtable-n{font-family:"IBM Plex Mono",monospace;font-size:.78rem;color:var(--r-teal);font-weight:600}
.rtable-row strong{font-size:.9rem;color:var(--r-ink)}
.rtable-row > span:last-child{font-size:.85rem;color:var(--r-muted);line-height:1.5}

.rpull{
  margin:40px 0;padding:0 0 0 22px;border-left:3px solid var(--r-rust);
  font-family:"Source Serif 4",Georgia,serif;font-style:italic;font-size:1.3rem;
  color:var(--r-ink);line-height:1.4;
}
.rpull cite{
  display:block;font-style:normal;font-family:"IBM Plex Mono",monospace;
  font-size:.7rem;color:var(--r-muted);margin-top:14px;
}

.rbottom{display:grid;grid-template-columns:120px 1fr;gap:20px;margin:44px 0;padding:22px 24px;background:var(--r-sand);border-left:3px solid var(--r-ink)}
.rbottom-k{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--r-ink);line-height:1.4}
.rbottom p{margin:0;font-family:"Source Serif 4",Georgia,serif;font-size:1.1rem;color:var(--r-ink);line-height:1.45}


.rask{margin:48px 0 0;padding:26px 28px;background:var(--r-teal-soft);border:1px solid var(--r-teal)}
.rask-k{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--r-teal)}
.rask-head p{
  font-family:"Source Serif 4",Georgia,serif;font-size:1.22rem;color:var(--r-ink);
  margin:8px 0 18px;line-height:1.35;
}
.rask-options{display:flex;flex-wrap:wrap;gap:8px}
.rask-opt{
  font:inherit;font-size:.85rem;background:var(--r-panel);color:var(--r-ink);
  border:1px solid var(--r-teal);border-radius:99px;padding:8px 16px;cursor:pointer;
  transition:background .12s,color .12s;
}
.rask-opt:hover{background:var(--r-teal);color:#fff}
.rask-opt.is-picked{background:var(--r-teal);color:#fff;font-weight:600}
.rask-opt:disabled{cursor:default}
.rask-thanks{display:none;font-size:.82rem;color:var(--r-teal);margin:16px 0 0}
.rask.is-answered .rask-thanks{display:block}
.rask-error{font-size:.82rem;color:var(--r-rust-ink);margin:14px 0 0}
.rask-error[hidden]{display:none}


.rpager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:64px 0 0;padding:28px 0 0;border-top:1px solid var(--r-rule)}
.rpager-link{
  display:flex;flex-direction:column;gap:4px;padding:18px 22px;text-decoration:none;
  border:1px solid var(--r-rule);background:var(--r-panel);
}
.rpager-link:hover{border-color:var(--r-teal)}
.rpager-link span{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--r-muted)}
.rpager-link strong{font-family:"Source Serif 4",Georgia,serif;font-weight:400;font-size:1.15rem;color:var(--r-ink)}
.rpager-next{text-align:right;align-items:flex-end}
.rpager-link.is-empty{border:0;background:transparent}
.rpager-cta{background:var(--r-ink);border-color:var(--r-ink)}
.rpager-cta span{color:rgba(255,255,255,.6)}
.rpager-cta strong{color:#fff}

.rfoot{
  max-width:960px;margin:56px auto 0;padding:20px 28px 40px;
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  border-top:1px solid var(--r-rule);
  font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--r-muted);
}


@media (max-width:860px){
  .rcascade{grid-template-columns:1fr;gap:0}
  .rcascade-stage{display:grid;grid-template-columns:60px 40px 1fr;gap:4px 12px;padding:10px 0;align-items:center}
  .rcascade-node{height:auto}
  .rcascade-node::before{display:none}
  .rcascade-label{grid-column:3}
  .rcascade-stage p{grid-column:3}
  .rspread-cols{grid-template-columns:1fr}
  .rspread-cols > div{border-right:0;border-bottom:1px solid color-mix(in srgb,var(--r-rust) 22%,transparent)}
  .rstacks{grid-template-columns:1fr}
  .rstacks-gap{padding:14px 0}
  .rstacks-gap span{writing-mode:horizontal-tb;transform:none}
  .rweek-lane{grid-template-columns:1fr;gap:8px}
  .rweek-track{grid-template-columns:1fr;gap:6px}
  .rweek-days{display:none}
  .rweek-seam{padding-left:0}
  .rloop{grid-template-columns:1fr}
  .rloop-col--out{text-align:left}
  .rroi{height:320px;margin-left:70px}
  .rbar:has(.rbar-n){grid-template-columns:auto 1fr 46px}
  .rbar{grid-template-columns:1fr 46px;grid-template-areas:"label value" "track track";row-gap:4px}
  .rbar-label{grid-area:label}
  .rbar-value{grid-area:value}
  .rbar-track{grid-area:track}
  .rbar-n{display:none}
  .rbottom{grid-template-columns:1fr;gap:10px}
  .rpager{grid-template-columns:1fr}
  .rtable-row{grid-template-columns:36px 1fr;gap:8px 12px}
  .rtable-row > span:last-child{grid-column:2}
  .rtop-title{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rask-opt{transition:none}
}