@font-face{font-family:"Newsreader";src:url(/fonts/newsreader-latin-opsz-normal.woff2) format("woff2");font-weight:200 800;font-style:normal;font-display:swap}
@font-face{font-family:"Newsreader";src:url(/fonts/newsreader-latin-opsz-italic.woff2) format("woff2");font-weight:200 800;font-style:italic;font-display:swap}
@font-face{font-family:"Plex Mono";src:url(/fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Plex Mono";src:url(/fonts/ibm-plex-mono-latin-400-italic.woff2) format("woff2");font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:"Plex Mono";src:url(/fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Plex Mono";src:url(/fonts/ibm-plex-mono-latin-600-normal.woff2) format("woff2");font-weight:600;font-display:swap}

:root{
  --paper:#f7f6f3; --paper-2:#eceae4; --ink:#14161c; --ink-2:#3e4452; --rule:#14161c;
  --blue:#0021A5; --orange:#FA4616; --plus:#1f7a3a; --minus:#b3261e; --hl:#ffd0be;
  --term-bg:#1c1b18; --term-ink:#ece6d8; --term-dim:#9c968a;
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  --mono:"Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sh:128px; --col:1fr; --mg:200px;
}
[data-theme="night"]{
  --paper:#10141c; --paper-2:#1a2030; --ink:#f4f1ea; --ink-2:#c5cad6; --rule:#f4f1ea;
  --blue:#c5d0ff; --orange:#ffb199; --plus:#6fd38f; --minus:#ff8a80; --hl:#6b2c18;
  --term-bg:#000; --term-ink:#ebe5d6; --term-dim:#8d887c;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:56px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--serif);font-size:19px;line-height:1.55;
  font-optical-sizing:auto;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;padding-bottom:40px}
a{color:var(--blue);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px}
::selection{background:var(--hl);color:var(--ink)}
kbd{font-family:var(--mono);font-size:.72em;border:1px solid currentColor;border-bottom-width:2px;border-radius:3px;padding:0 .35em;margin:0 .08em;white-space:nowrap}
code,pre{font-family:var(--mono)}
.skip{position:absolute;left:-9999px;top:8px;background:var(--ink);color:var(--paper);padding:8px 12px;z-index:99}
.skip:focus{left:8px}

/* running header like a printed man page */
.runhead,.runfoot{display:flex;justify-content:space-between;gap:12px;font-family:var(--mono);font-size:13px;letter-spacing:.04em}
.runhead{position:sticky;top:0;z-index:20;background:var(--paper);padding:14px 28px;border-bottom:1px solid var(--rule)}
.runhead > span:first-child,.runhead > span:last-child{white-space:nowrap;flex:none}
.runhead-mid{font-style:italic;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding:0 16px;text-align:center}

.frame{display:grid;grid-template-columns:200px minmax(0,1fr);max-width:1320px;margin:0 auto}
.toc{position:sticky;top:48px;align-self:start;height:calc(100vh - 48px);padding:40px 20px 24px 28px;font-family:var(--mono);font-size:13px;
  border-right:1px solid var(--rule);display:flex;flex-direction:column}
.toc-label{margin:0 0 14px;color:var(--ink-2);font-size:11px;letter-spacing:.12em;text-transform:uppercase}
.toc ol{list-style:none;margin:0;padding:0;counter-reset:s}
.toc li{counter-increment:s}
.toc a{display:flex;gap:10px;padding:5px 0;color:var(--ink-2);text-decoration:none;letter-spacing:.06em}
.toc a::before{content:counter(s,decimal-leading-zero);opacity:.55;font-size:11px;padding-top:1px}
.toc a:hover{color:var(--ink)}
.toc a[aria-current="true"]{color:var(--ink);font-weight:600}
.toc a[aria-current="true"]::after{content:"◂";margin-left:auto;color:var(--blue)}
.toc-else{margin:18px 0 14px;font-size:12px}
.toc-else a{color:var(--ink-2);text-decoration:none;letter-spacing:.04em}
.toc-else a:hover{color:var(--ink)}
.kbd-hint{margin-top:auto;background:none;border:1px dashed var(--ink-2);color:var(--ink-2);font:inherit;font-size:12px;padding:10px;text-align:left;cursor:pointer;border-radius:2px}
.kbd-hint:hover{color:var(--ink);border-color:var(--ink)}

main{padding:0 28px 40px 40px;outline:none}
.sec{display:grid;grid-template-columns:var(--sh) minmax(0,var(--col)) var(--mg);column-gap:32px;padding:56px 0 52px;border-bottom:1px solid color-mix(in srgb,var(--rule) 22%,transparent)}
.sh{grid-column:1;margin:0;font-family:var(--mono);font-weight:600;font-size:14px;letter-spacing:.1em;padding-top:6px}
.body{grid-column:2;min-width:0}
.margin{grid-column:3;font-size:14.5px;line-height:1.45;color:var(--ink-2);font-style:italic;padding-top:4px}
.margin p{margin:0;border-left:1px solid var(--blue);padding-left:12px}
.mn{font-style:normal;color:var(--blue);margin-right:6px;font-family:var(--mono)}
.prose p,.prose{margin:0 0 1em;max-width:62ch}
.small{font-size:16px;color:var(--ink-2)}

/* NAME */
.sec-name{padding-top:64px;padding-bottom:72px;grid-template-columns:var(--sh) minmax(0,1fr)}
.sec-name .sh{grid-row:1 / span 2;align-self:start}
.sec-name .body{grid-column:2;grid-row:1}
.sec-name .margin{grid-column:2;grid-row:2;margin-top:22px;max-width:46ch}
.title{margin:0;font-weight:400;line-height:.98}
.title-cmd{display:block;font-style:italic;font-weight:500;font-size:clamp(64px,9.4vw,140px);letter-spacing:-.04em;line-height:.84;margin-left:-.03em}
.title-cmd span{display:block}
.title-line{display:block;margin-top:22px;max-width:19em;font-size:clamp(26px,2.8vw,40px);line-height:1.12;letter-spacing:-.01em;font-weight:380}
.title-dash{color:var(--blue);margin-right:.25em}
.title-desc{display:inline}
.title-desc em{background:linear-gradient(transparent 62%,var(--hl) 62%);font-style:italic;padding:0 .08em}
.lede{font-family:var(--mono);font-size:14.5px;line-height:1.7;margin:34px 0 0;max-width:56ch;color:var(--ink-2)}

/* SYNOPSIS */
.synopsis{margin:0;font-size:15px;line-height:1.85;white-space:pre;overflow-x:auto}
.synopsis a{color:inherit;text-decoration:underline;text-decoration-color:var(--blue)}
.synopsis i{color:var(--blue);font-style:italic}

/* OPTIONS */
.opts{margin:0}
.opts>div{padding:0 0 22px;margin:0 0 22px;border-bottom:1px dotted color-mix(in srgb,var(--rule) 40%,transparent)}
.opts>div:last-child{border:0;margin:0}
.opts dt{font-size:15px;margin-bottom:6px}
.opts dt i{color:var(--blue)}
.opts dd{margin:0 0 0 2.2em;max-width:58ch}
.opts>div:target{background:color-mix(in srgb,var(--hl) 45%,transparent)}

.intent{border-left:2px solid var(--blue);padding-left:16px;margin:0 0 1.35em}
.intent .subh{margin-top:0}
.intent p:last-child{margin-bottom:0}
.built{list-style:none;margin:0 0 .4em;padding:0}
.built li{padding:0 0 .9em;max-width:62ch}
.built li:last-child{padding-bottom:0}
.buglist{list-style:none;margin:0;padding:0}
.buglist li{padding:0 0 1.05em;max-width:62ch}
.buglist li:last-child{padding-bottom:0}
.bug-id{display:block;margin-bottom:4px;font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--blue)}

/* EXAMPLES / simulator */
.sec-wide .body{grid-column:2 / 4}
.sim{background:var(--term-bg);color:var(--term-ink);font-family:var(--mono);font-size:13.5px;line-height:1.55;border-radius:4px;padding:20px 22px 16px;
  box-shadow:8px 8px 0 color-mix(in srgb,var(--ink) 18%,transparent)}
.sim-controls{display:flex;flex-wrap:wrap;gap:12px 18px;align-items:end;padding-bottom:16px;border-bottom:1px solid #3a3832}
.seg{border:0;margin:0;padding:0;display:flex;gap:0;align-items:end;flex-wrap:wrap}
.seg legend,.sel>span{display:block;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--term-dim);margin-bottom:6px;padding:0}
.seg label{position:relative}
.seg input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.seg span{display:block;padding:7px 14px;border:1px solid #57544c;margin-left:-1px;cursor:pointer}
.seg label:first-of-type span{border-radius:3px 0 0 3px;margin-left:0}
.seg label:last-of-type span{border-radius:0 3px 3px 0}
.seg input:checked+span{background:var(--term-ink);color:var(--term-bg);border-color:var(--term-ink)}
.seg input:focus-visible+span{outline:2px solid #c5d0ff;outline-offset:2px}
.sel select{font:inherit;color:var(--term-ink);background:transparent;border:1px solid #57544c;border-radius:3px;padding:7px 28px 7px 10px;appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,currentColor 50%),linear-gradient(135deg,currentColor 50%,transparent 50%);
  background-position:calc(100% - 15px) 52%,calc(100% - 10px) 52%;background-size:5px 5px;background-repeat:no-repeat;cursor:pointer}
.sel select option{background:#1c1b18;color:#ece6d8}
.run{margin-left:auto;font:inherit;font-weight:600;background:#f2eee4;color:#1c1b18;border:0;border-radius:3px;padding:8px 18px;cursor:pointer}
.run:hover{background:var(--orange);color:#14161c}
.run[disabled]{opacity:.6;cursor:progress}
.sim-cmd{padding:14px 0 10px;color:var(--term-ink);overflow-wrap:anywhere}
.prompt{color:#7ee2a0}
.caret{display:inline-block;width:.6em;height:1.05em;background:var(--term-ink);vertical-align:-2px;margin-left:4px;animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.sim-panes{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:22px;min-height:340px}
.pane-h{margin:0 0 8px;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--term-dim)}
.pane-h2{margin-top:18px}
.pane-diff{border-left:1px dashed #3a3832;padding-left:20px}
.log,.diff,.evidence{list-style:none;margin:0;padding:0}
.log li{display:grid;grid-template-columns:3.2em 1fr;gap:6px;padding:2px 0;animation:in .25s ease-out both}
.log .n{color:var(--term-dim)}
.log .ok{color:#7ee2a0}
.log .warn{color:#ffd36b}
.log .bad{color:#ff8a80}
.log .sys{color:#a9b5ff}
.log li.done{display:block;margin-top:8px;color:#7ee2a0}
.diff li{padding:1px 0;animation:in .25s ease-out both;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.diff .add{color:#7ee2a0}
.diff .rem{color:#ff8a80;text-decoration:line-through;text-decoration-color:rgba(255,138,128,.6)}
.diff .keep{color:var(--term-dim)}
.evidence li{padding:1px 0;animation:in .25s ease-out both;color:#ffd36b}
.evidence li::before{content:"▪ ";color:var(--term-dim)}
.empty{color:var(--term-dim);font-style:italic}
@keyframes in{from{opacity:0;transform:translateY(3px)}to{opacity:1;transform:none}}
.sim-foot{margin:14px 0 0;padding-top:10px;border-top:1px solid #3a3832;font-size:11.5px;color:var(--term-dim)}

/* PROCEDURE */
.phases{display:flex;border:1px solid var(--rule);border-radius:3px;margin:6px 0 22px;overflow:hidden}
.phases button{flex:1;font-family:var(--mono);font-size:14px;font-weight:600;background:transparent;color:var(--ink);border:0;border-left:1px solid var(--rule);padding:12px 12px;cursor:pointer;text-align:left}
.phases button:first-child{border-left:0}
.phases small{display:block;font-weight:400;font-size:12px;color:var(--ink-2);margin-top:2px}
.phases button[aria-selected="true"]{background:var(--ink);color:var(--paper)}
.phases button[aria-selected="true"] small{color:color-mix(in srgb,var(--paper) 70%,transparent)}
.steps{margin:0;padding:0}
.steps li{position:relative;padding:0 0 14px 3.2em;max-width:60ch}
.steps li::before{content:counter(list-item,decimal-leading-zero);position:absolute;left:0;top:.18em;font-family:var(--mono);font-size:13px;color:var(--blue);
  border:1px solid var(--blue);border-radius:50%;width:2.1em;height:2.1em;display:grid;place-items:center}
.steps{list-style:decimal}
.steps li::marker{content:""}
.phase{animation:in .3s ease-out both}

/* HISTORY */
.changelog{list-style:none;margin:0;padding:0;position:relative}
.changelog::before{content:"";position:absolute;left:4.5em;top:10px;bottom:10px;border-left:1px solid var(--rule)}
.changelog li{display:grid;grid-template-columns:4.5em 1fr;gap:0 26px;padding:10px 0;position:relative}
.changelog li::after{content:"";position:absolute;left:calc(4.5em - 4px);top:21px;width:9px;height:9px;background:var(--paper);border:1px solid var(--rule);border-radius:50%}
.changelog .cl-now::after{background:var(--blue);border-color:var(--blue);box-shadow:0 0 0 4px color-mix(in srgb,var(--blue) 20%,transparent)}
.cl-ver{font-family:var(--mono);font-size:13px;color:var(--ink-2);padding-top:7px;text-align:right;padding-right:16px}
.changelog p{margin:0}
.changelog .cl-role{margin-top:8px}
.cl-co{font-size:26px;letter-spacing:-.01em;line-height:1.25}
.changelog li:not(.cl-now) .cl-co{font-size:22px}
.cl-co+p{color:var(--ink-2);font-size:17px}
.cl-tag{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--blue);border:1px solid var(--blue);padding:1px 6px;border-radius:2px;vertical-align:5px;margin-left:6px}
.cl-init .cl-co{font-style:italic}

/* SEE ALSO */
.xrefs{list-style:none;padding:0;margin:0}
.xrefs>li{padding:8px 0}
.xrefs a{font-family:var(--mono);font-size:16px}
.xrefs b{font-weight:600}
.xrefs>li>b{font-family:var(--mono);font-size:16px}
.xrefs ul{list-style:none;padding:6px 0 0 1.4em;margin:0}
.xrefs ul li{padding:3px 0}
.xrefs code{font-size:13px;color:var(--blue);display:inline-block;min-width:5.5em}

/* AUTHOR */
.author{display:grid;grid-template-columns:200px 1fr;gap:32px;align-items:start}
.headshot{margin:0}
.headshot img{display:block;width:100%;height:auto;background:#0021A5}
.headshot figcaption{font-style:italic;font-size:13.5px;color:var(--ink-2);margin-top:8px}
.subh{font-family:var(--mono);font-size:13px;letter-spacing:.1em;font-weight:600;margin:22px 0 8px}
.contact{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:14px 0 0}
.mail{font-size:clamp(28px,3.4vw,44px);font-style:italic;letter-spacing:-.01em}
.copy{font-family:var(--mono);font-size:12px;background:none;border:1px solid var(--ink);color:var(--ink);padding:4px 10px;border-radius:2px;cursor:pointer}
.copy:hover{background:var(--ink);color:var(--paper)}
.copied{font-family:var(--mono);font-size:12px;color:var(--plus)}

.runfoot{padding:28px 0 8px}

/* pager status line */
.pager{position:fixed;left:0;right:0;bottom:0;z-index:30;display:flex;justify-content:space-between;gap:12px;font-family:var(--mono);font-size:12.5px;
  background:var(--ink);color:var(--paper);padding:6px 16px}
.pager-btn{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;text-decoration:underline}
#pager-sec{font-weight:600}
.fab{display:none}

/* palette */
.palette,.help{position:fixed;inset:0;z-index:50;background:color-mix(in srgb,#000 38%,transparent);display:flex;justify-content:center;align-items:flex-start;padding:12vh 16px 16px}
.palette[hidden],.help[hidden]{display:none}
.palette-card,.help-card{width:min(620px,100%);background:var(--paper);color:var(--ink);border:1px solid var(--rule);border-radius:4px;box-shadow:10px 10px 0 color-mix(in srgb,#000 30%,transparent);
  font-family:var(--mono);animation:pop .14s ease-out both}
@keyframes pop{from{opacity:0;transform:translateY(-6px) scale(.99)}to{opacity:1;transform:none}}
.palette-in{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--rule);font-size:16px}
.palette-in input{flex:1;font:inherit;background:transparent;border:0;color:var(--ink);outline:none}
.palette-in kbd{font-size:11px;color:var(--ink-2)}
#palette-list{list-style:none;margin:0;padding:6px;max-height:min(420px,56vh);overflow:auto}
#palette-list li{display:flex;justify-content:space-between;gap:12px;padding:9px 12px;border-radius:3px;cursor:pointer;font-size:14px}
#palette-list li .grp{color:var(--ink-2);font-size:11px;letter-spacing:.1em;text-transform:uppercase;align-self:center}
#palette-list li[aria-selected="true"]{background:var(--ink);color:var(--paper)}
#palette-list li[aria-selected="true"] .grp{color:color-mix(in srgb,var(--paper) 65%,transparent)}
#palette-list mark{background:var(--hl);color:inherit}
#palette-list li[aria-selected="true"] mark{background:transparent;text-decoration:underline}
#palette-list .none{color:var(--ink-2);cursor:default}
.help-card{padding:22px 24px}
.help-card h2{font-size:14px;letter-spacing:.1em;margin:0 0 14px}
.help-card dl{display:grid;grid-template-columns:auto 1fr;gap:10px 22px;margin:0 0 18px;font-size:14px}
.help-card dd{margin:0;color:var(--ink-2)}
.help-close{font:inherit;font-size:13px;background:var(--ink);color:var(--paper);border:0;padding:7px 14px;border-radius:2px;cursor:pointer}

/* responsive */
@media (max-width:1180px){
  :root{--mg:0px}
  .sec{grid-template-columns:var(--sh) minmax(0,1fr)}
  .margin{grid-column:2;margin-top:18px;max-width:52ch}
  .sec-wide .body{grid-column:2}
}
@media (max-width:860px){
  body{font-size:18px}
  .frame{grid-template-columns:1fr}
  .toc{display:none}
  .runhead{padding:12px 18px;font-size:11.5px}
  .runhead-mid{display:none}
  main{padding:0 18px 40px}
  .sec{grid-template-columns:1fr;padding:38px 0 36px}
  .sh{margin-bottom:16px;padding:0}
  .body,.margin,.sec-wide .body{grid-column:1}
  .title-cmd{font-size:clamp(52px,16.5vw,92px)}
  .sec-name{grid-template-columns:1fr}
  .sec-name .sh{grid-row:auto}
  .sec-name .body,.sec-name .margin{grid-column:1;grid-row:auto}
  .title-line{margin-top:16px}
  .synopsis{font-size:12.4px}
  .sec-name .margin{display:none}
  .runfoot{font-size:11px}
  .sim{padding:16px 14px 12px;margin:0 -6px;box-shadow:5px 5px 0 color-mix(in srgb,var(--ink) 18%,transparent)}
  .run{margin-left:0;width:100%;padding:11px}
  .sim-panes{grid-template-columns:1fr;min-height:0}
  .pane-diff{border-left:0;border-top:1px dashed #3a3832;padding:14px 0 0}
  .log{min-height:220px}
  .phases{flex-direction:column}
  .phases button{border-left:0;border-top:1px solid var(--rule)}
  .phases button:first-child{border-top:0}
  .author{grid-template-columns:1fr}
  .headshot{max-width:200px}
  .pager-l{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .pager-r .pager-help,.pager-r .pager-btn{display:none}
  .fab{display:block;position:fixed;right:14px;bottom:44px;z-index:31;font-family:var(--mono);font-size:14px;font-weight:600;background:var(--blue);color:#fff;
    border:0;border-radius:999px;padding:12px 16px;box-shadow:3px 3px 0 color-mix(in srgb,#000 30%,transparent);cursor:pointer}
  [data-theme="night"] .fab{color:#000}
}
@media (max-width:420px){
  .runhead{font-size:10px;letter-spacing:.02em;padding:12px 10px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}
@media print{
  .runhead{position:static}
  .toc,.pager,.fab,.palette,.help,.sim-controls,.sim-cmd,.copy,.kbd-hint,.margin{display:none!important}
  .frame{display:block}
  main{padding:0}
  .sec{display:block;padding:14px 0;break-inside:avoid}
  .sh{margin-bottom:6px}
  body{font-size:12pt;padding:0;background:#fff;color:#000}
  .sim{box-shadow:none;border:1px solid #000;background:#fff;color:#000}
  .title-cmd{font-size:36pt}
  a{color:#000}
}

.shooting .pager,.shooting .fab{display:none!important}
.sh[tabindex="-1"]:focus{outline:none}