/* Tokens and rules: see DESIGN.md ("Sumi") */
@font-face{font-family:"General Sans";src:url(fonts/general-sans-500.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Source Serif 4";src:url(fonts/source-serif-4.woff2?v=2) format("woff2");font-weight:400 600;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url(fonts/jetbrains-mono-400.woff2) format("woff2");font-weight:400;font-display:swap}

:root{
  --paper:#FBFBF9; --surface:#F2F2EF; --text:#1A1A19; --muted:#5F5F5B; --rule:#E4E4E0;
  --accent:#2D3E73; --accent-hover:#1E2A4D; --wash:#E2E6F1;
  --success:#2F7D4F; --warning:#8F5D10; --error:#B42318;
  --display:"General Sans","Helvetica Neue",Arial,sans-serif;
  --body:"Source Serif 4",Georgia,serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root{
    --paper:#131312; --surface:#1C1C1B; --text:#E6E6E2; --muted:#9A9A94; --rule:#2A2A28;
    --accent:#A3B2E6; --accent-hover:#C3CDF0; --wash:#2A3250;
    --success:#5DBB86; --warning:#E0A94A; --error:#F0796E;
    color-scheme:dark;
  }
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--text);font:400 1.1875rem/1.65 var(--body)}
a{color:var(--text);text-decoration-color:var(--muted);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--accent);text-decoration-color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
::selection{background:var(--wash);color:var(--text)}
mark{background:linear-gradient(transparent 55%,var(--wash) 55%,var(--wash) 95%,transparent 95%);color:var(--text);padding:0 .1em}
strong{font-weight:600}
.skip{position:absolute;left:-999px}
.skip:focus{left:16px;top:16px;background:var(--paper);padding:8px}

/* chrome */
.top{display:flex;flex-wrap:wrap;gap:0 28px;align-items:center;max-width:1080px;margin:0 auto;padding:16px 24px;font:500 .9375rem var(--display)}
.top a{color:var(--muted);text-decoration:none;padding-block:12px}
.top a:hover{color:var(--text)}
.top a[aria-current]{color:var(--text);text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:8px}
.top a.home{margin-right:auto;display:flex;align-items:center;gap:12px;font:400 .875rem var(--mono);color:var(--text);text-decoration:none}
.top .home img{display:block;width:28px;height:28px}
footer{margin-top:168px}
footer .in{max-width:1080px;margin:0 auto;padding:24px 24px 40px;display:grid;gap:8px}
.meta{font:400 .8125rem/1.5 var(--mono);color:var(--muted)}
footer nav{display:flex;flex-wrap:wrap;gap:0 24px;font:500 .9375rem var(--display)}
footer nav a{color:var(--muted);text-decoration:none;padding-block:12px}
footer nav a:hover{color:var(--text)}

/* page grid: margin column + reading column */
main{max-width:1080px;margin:0 auto;padding:104px 24px 0}
.grid{display:grid;grid-template-columns:120px minmax(0,66ch);column-gap:40px}
.m{font:400 .8125rem var(--mono);color:var(--muted);padding-top:.45em}
.grid>.m:has(+ .clause){padding-top:calc(20px + .45em)}
.m .icon{display:block;width:40px;height:40px;color:var(--muted)}
/* icon rows: number + icon sit inline in the content column, above the heading */
.grid>.m:has(.icon){grid-column:2;display:flex;flex-wrap:wrap;align-items:center;gap:4px 12px;padding-top:20px}
.grid>.m:has(.icon)+*{grid-column:2}
.grid>.m:has(.icon)+.clause{padding-top:8px}
.m small{display:block;font:400 .75rem/1.5 var(--mono);color:var(--muted)}
h1{font:500 clamp(2rem,4.2vw,3.25rem)/1.1 var(--display);letter-spacing:-.02em;margin:0 0 24px;max-width:18ch;text-wrap:balance}
h1.page{font-size:clamp(1.875rem,3.6vw,2.75rem);max-width:22ch}
.lede+.lede+p:not(.lede){margin-top:64px}
.sub{font:500 1.25rem/1.45 var(--display);color:var(--muted);margin:0 0 64px;max-width:36ch;text-wrap:balance}
/* Quiet editorial ink; the white image ground blends into each paper theme. */
.ink-scene{margin:0 0 40px;width:min(100%,360px)}
.ink-scene img{display:block;width:100%;height:auto;filter:grayscale(1) contrast(1.15);mix-blend-mode:multiply}
.local-copy{margin:40px 0 0;max-width:420px}
.local-copy svg{display:block;width:100%;height:auto;color:var(--muted)}
.local-copy figcaption{font:400 1rem/1.55 var(--body);color:var(--muted);margin-top:16px}
.comparison{grid-column:2}
.arrangements{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:24px}
.arrangement{margin:0;min-width:0}
.arrangement svg{display:block;width:100%;height:auto;max-width:280px;color:var(--text);margin-bottom:24px}
.arrangement h3{margin-bottom:12px}
.arrangement p{font-size:1rem;line-height:1.55;margin:0}
.arrangement p+p{margin-top:12px;color:var(--muted)}
.diagram-key{margin-top:24px}
.questions{margin:24px 0 0;padding-left:1.1em}
.questions li+li{margin-top:16px}
.software-goals{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px 24px;list-style:none;padding:0;margin:40px 0}
.software-goals li{min-width:0}
.software-goals .pin-illustration{display:block;width:144px;height:144px;object-fit:contain;margin-bottom:16px}
.software-goals h3{font-size:1.0625rem;line-height:1.35;min-height:2.7em;margin-bottom:8px}
.software-goals p{font-size:1rem;line-height:1.55;margin:0}
.goals-context{margin-top:40px}
.status-facts{margin:40px 0}
.status-facts>div{display:grid;grid-template-columns:120px minmax(0,1fr);gap:24px;margin-bottom:32px}
.status-facts dt{font:500 .9375rem/1.65 var(--display);color:var(--muted);padding-top:4px}
.status-facts dd{margin:0}
.contact-detail{font:500 .9375rem/1.5 var(--display);display:inline-block;margin:16px 0 0 16px}
.work-cycle{list-style:none;counter-reset:work;padding:0;margin:32px 0}
.work-cycle li{counter-increment:work;display:grid;grid-template-columns:32px 1fr;gap:16px;margin-top:24px}
.work-cycle li:before{content:counter(work,decimal-leading-zero);font:400 .8125rem/1.65 var(--mono);color:var(--muted);padding-top:4px}
.work-cycle strong{font:500 1.1875rem/1.35 var(--display);display:block;margin-bottom:4px}
@media (prefers-color-scheme:dark){.ink-scene img{filter:grayscale(1) contrast(1.15) invert(1);mix-blend-mode:screen}}
h2{font:500 1.5rem/1.25 var(--display);letter-spacing:-.01em;margin:104px 0 16px;text-wrap:balance}
h3{font:500 1.1875rem/1.35 var(--display);margin:0 0 8px;text-wrap:balance}
p{text-wrap:pretty}
.clause{padding-block:20px}
.clause p{margin:0}
.clause p+p{margin-top:12px}
.draft{font:400 .8125rem/1.5 var(--mono);color:var(--warning);margin:0 0 8px}
blockquote{margin:0;padding:0}
.sig{display:flex;align-items:center;gap:12px;font:500 .9375rem/1.5 var(--display);color:var(--muted)}
.sig img{display:block;width:32px;height:32px;flex:0 0 32px}
.sig a{min-width:0}
ul.plain{padding-left:1.1em}
ul.plain li+li{margin-top:8px}

/* calls to action */
.cta{margin-top:104px}
.cta h2{margin-top:0}
.who{padding-block:20px}
.who h3{margin-bottom:4px}
.who p{margin:0 0 12px}
.btn{display:inline-block;font:500 1rem var(--display);padding:12px 22px;border-radius:2px;border:1px solid var(--text);text-decoration:none}
.btn-primary{background:var(--text);color:var(--paper)}
.btn-primary:hover{background:var(--accent);border-color:var(--accent);color:var(--paper)}
.btn-ghost{color:var(--text);background:transparent}
.btn-ghost:hover{color:var(--accent);border-color:var(--accent)}
.sign{font:500 1rem var(--display);text-underline-offset:6px;position:relative;display:inline-block;padding-bottom:6px}
.sign:hover,.sign:focus-visible{text-decoration-color:transparent}
.sign svg{position:absolute;left:0;bottom:-4px;width:100%;height:10px;overflow:visible}
.sign path{stroke:var(--accent);stroke-width:1.5;fill:none;stroke-dasharray:240;stroke-dashoffset:240;transition:stroke-dashoffset .5s ease-out}
.sign:hover path,.sign:focus-visible path{stroke-dashoffset:0}
@media (prefers-reduced-motion:reduce){.sign path{transition:none;stroke-dashoffset:0}}

/* principles page */
.aside{font-size:1rem;color:var(--muted);padding-top:24px}
.principle{padding:8px 0 64px}
.principle h2{margin-top:0;margin-bottom:24px}
.principle h3{font:500 .9375rem var(--display);color:var(--muted);margin:32px 0 8px}
.principle p,.principle ul{margin-top:0}
.grid>.m:has(+ .principle){font-size:1.25rem;padding-top:.1em}
.grid>.m:has(.icon):has(+ .principle){font-size:.8125rem;padding-top:20px}
.ask{background:var(--surface);border-radius:2px;padding:18px 20px;margin:32px 0 16px}
.ask span{display:block;font:500 .9375rem var(--display);color:var(--text);margin-bottom:4px}
h2.sec{margin-top:40px}

/* source cards (typeset only, no logos) */
.sources-h{margin:40px 0 0}
.source{border:1px solid var(--rule);border-radius:2px;padding:16px 20px;margin-top:16px}
.source p{margin:0}
.source .source-t{font:500 1.1875rem/1.35 var(--display);margin:6px 0 8px}
.source p:last-child{font-size:1rem;color:var(--muted)}

/* forms, tables */
label{display:block;font:500 .9375rem var(--display);margin-bottom:6px}
input{font:400 1rem var(--body);padding:10px 12px;border:1px solid var(--muted);border-radius:2px;background:var(--paper);color:var(--text);width:min(320px,100%)}
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
[disabled],[aria-disabled="true"]{opacity:.55;cursor:not-allowed}
.tbl{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:1rem}
th,td{text-align:left;padding:12px 16px 12px 0;border-bottom:1px solid var(--rule);vertical-align:top}
th{font:500 .875rem var(--display);color:var(--muted)}
td:last-child{white-space:nowrap}
td.yes{color:var(--success);font-family:var(--display);font-weight:500}

.closing{font:500 1.5rem/1.35 var(--display);letter-spacing:-.01em;margin:64px 0 0;text-wrap:balance}

/* notices */
.note{font:400 1rem/1.55 var(--body);padding:14px 16px;border-radius:2px;background:var(--surface);margin:16px 0}
.note b{font:500 1rem var(--display)}
.note.warn b{color:var(--warning)}

@media (max-width:1000px){.software-goals{grid-template-columns:repeat(2,minmax(0,1fr))}.arrangements{grid-template-columns:1fr;gap:40px}.arrangement svg{max-width:240px}}

@media (max-width:760px){
  main{padding-top:56px}
  .grid{grid-template-columns:1fr}
  .m,.grid>.m:has(+ .clause){padding-top:0;margin-bottom:12px}
  .m:empty{display:none}
  .grid>.m:has(.icon),.grid>.m:has(.icon)+*{grid-column:auto}
  .grid>.m:has(.icon){margin-bottom:0}
  h2{margin-top:64px}
  .cta{margin-top:64px}
  footer{margin-top:104px}
  .top{padding:8px 16px;gap:0 22px}
  .top a.home{flex-basis:100%}
  .ink-scene{width:min(100%,280px)}
  .comparison{grid-column:auto}
  .status-facts>div{grid-template-columns:1fr;gap:8px}
  .status-facts dt{padding-top:0}
  .software-goals{grid-template-columns:1fr}
  .software-goals h3{min-height:0}
  .arrangement svg{max-width:240px;margin-bottom:16px}
  main,footer .in{padding-inline:16px}
}
.mail{font:500 1.0625rem/1.5 var(--display)}

/* The primary mark and its rationale on About. */
.about-mark{width:min(100%,280px);margin:24px 0 32px}
.about-mark img{display:block;width:100%;height:auto}
.mark-context{font-size:1rem;line-height:1.55;color:var(--muted)}

.principles-badge{width:min(100%,260px);margin:32px 0 0}
.principles-badge img{display:block;width:100%;height:auto}
.badge-caption{max-width:42ch;font-size:1rem;line-height:1.55;color:var(--muted);margin-top:16px}
@media (prefers-color-scheme:dark){.about-mark img{filter:invert(1)}}