/* Systems Over Signals · Projects. Light blueprint: parchment ground, faint teal drawing grid, teal linework, amber only for gaps. */

/* Fonts are self-hosted by the site. */
@font-face{font-family:"IBM Plex Sans Condensed";src:url("/assets/fonts/plex-sans-condensed-600.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Sans Condensed";src:url("/assets/fonts/plex-sans-condensed-700.woff2") format("woff2");font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url("/assets/fonts/plex-sans-400.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url("/assets/fonts/plex-sans-500.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url("/assets/fonts/plex-sans-600.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url("/assets/fonts/plex-mono-400.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url("/assets/fonts/plex-mono-500.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"Newsreader";src:url("/assets/fonts/newsreader-latin-normal.woff2") format("woff2");font-weight:200 800;font-style:normal;font-display:swap}

:root{
  --paper:#F9F7F0; --sheet:#FFFFFF; --ink:#1C2B2A; --teal:#2A4847; --teal-soft:#E2ECEA;
  --muted:#56625E; --body2:#3A4542; --rule:rgba(42,72,71,.28); --rule-strong:rgba(42,72,71,.55);
  --grid:rgba(42,72,71,.07); --amber:#8F5313; --amber-soft:rgba(154,90,22,.07);
  --f-display:"IBM Plex Sans Condensed","Arial Narrow",system-ui,sans-serif;
  --f-body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --tower:196px;
  color-scheme:light;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background-color:var(--paper);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:32px 32px;color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.6}
a{color:var(--teal)}
a:hover{color:var(--ink)}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px}
/* Same page width and gutters as the rest of the site */
.wrap{max-width:1120px;margin:0 auto;padding-left:max(clamp(16px,4vw,40px),env(safe-area-inset-left,0px));padding-right:max(clamp(16px,4vw,40px),env(safe-area-inset-right,0px))}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:16px;background:var(--sheet);padding:8px 12px;z-index:10}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* Header and footer: mirror of the site's shared chrome (site.css). Keep in step if the site changes. */
.site-header,.site-footer{background:#F9F7F0;font-family:"IBM Plex Sans",system-ui,sans-serif}
.site-header{border-bottom:1px solid #DAD5C6}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px 24px;min-height:72px;flex-wrap:wrap}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:#1B2626;font-family:"Newsreader",Georgia,serif;font-size:1.3rem;font-weight:500;letter-spacing:-.01em;line-height:1.65}
.brand:hover{color:#1B2626}
.brand img{height:36px;width:auto;display:block}
.nav{display:flex;gap:clamp(18px,3vw,32px)}
.nav a{color:#43504E;text-decoration:none;font-size:.97rem;line-height:1.65;padding:6px 0;border-bottom:1.5px solid transparent}
.nav a:hover{color:#1B2626;border-bottom-color:#B7B09E}
.nav a[aria-current="page"]{color:#1B2626;border-bottom-color:#2A4847}
.site-footer{border-top:1px solid #DAD5C6;padding:44px 0 52px;font-size:.94rem;line-height:1.65;color:#43504E}
.foot-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:24px 48px}
.foot-brand{font-family:"Newsreader",Georgia,serif;font-size:1.15rem;color:#1B2626;margin:0 0 6px}
.foot-brand .muted{color:#5E6A68;font-family:"IBM Plex Sans",system-ui,sans-serif;font-size:.9rem}
.foot-explain{margin:0;max-width:44ch}
.foot-nav{display:flex;flex-wrap:wrap;gap:10px 24px;list-style:none;margin:0;padding:0}
.foot-nav a{color:#43504E;text-decoration:none}
.foot-nav a:hover{color:#1B2626;text-decoration:underline}
.foot-bottom{margin-top:32px;padding-top:18px;border-top:1px solid #DAD5C6;display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 32px;font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:.76rem;letter-spacing:.03em;color:#5E6A68}
.foot-bottom p{margin:0}
.foot-bottom a{color:#5E6A68;margin-left:.6em}
.foot-bottom a:hover{color:#1B2626}
@media (max-width:480px){.site-header .wrap{padding-top:14px;padding-bottom:10px}.nav{width:100%;gap:16px}.nav a{font-size:.94rem}.brand{font-size:1.18rem}}

/* Type */
.eyebrow{font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px 18px}
.eyebrow a{color:var(--muted);text-decoration:none}
.eyebrow a:hover{color:var(--teal)}
h1,h2,h3{font-family:var(--f-display);color:var(--teal);text-wrap:balance;margin:0}
h1{font-weight:700;font-size:clamp(36px,6vw,68px);line-height:1.02;letter-spacing:-.01em}
h2{font-weight:700;font-size:clamp(26px,3.4vw,36px);line-height:1.1}
h3{font-weight:600;font-size:21px;line-height:1.2;color:var(--ink)}
.lede{font-size:clamp(17px,1.6vw,19px);line-height:1.6;color:var(--body2);max-width:64ch;margin:0}
.small{font-size:14px;color:var(--muted);max-width:68ch;margin:0}
.textlink{font-family:var(--f-mono);font-size:13px;color:var(--teal)}

/* Sections */
.hero{padding-block:56px 40px;display:flex;flex-direction:column;gap:20px}
.stats{display:flex;flex-wrap:wrap;gap:16px 44px;padding-top:20px;margin-top:8px;border-top:1px solid var(--rule)}
.stat{display:flex;flex-direction:column;gap:2px}
.stat b{font-family:var(--f-display);font-weight:700;font-size:34px;line-height:1;color:var(--teal);font-variant-numeric:tabular-nums}
.stat span{font-size:13px;color:var(--muted)}
.stat.gap b{color:var(--amber)}
section.block{padding-block:48px;display:flex;flex-direction:column;gap:24px;border-top:1px solid var(--rule)}
.block-head{display:flex;flex-direction:column;gap:10px}
.sec-no{font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;color:var(--muted)}

/* The stack as a drawing: phases bracket the columns, towers of blocks rise above a rail, stations sit on the rail */
.drawing{background:rgba(255,255,255,.55);border:1px solid var(--rule-strong);padding:24px 20px 20px;display:flex;flex-direction:column;gap:14px;min-width:0}
.titleblock{display:flex;flex-wrap:wrap;justify-content:space-between;gap:6px 24px;font-family:var(--f-mono);font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);padding-bottom:10px;border-bottom:1px solid var(--rule)}
.phases,.cols{display:grid;grid-template-columns:repeat(11,minmax(0,1fr));column-gap:8px}
.phase{border-top:1px solid var(--teal);position:relative;padding-top:8px;font-family:var(--f-mono);font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--teal)}
.phase::before,.phase::after{content:"";position:absolute;top:-1px;width:1px;height:8px;background:var(--teal)}
.phase::before{left:0}.phase::after{right:0}
.phase span{display:block;color:var(--muted);text-transform:none;letter-spacing:0;font-family:var(--f-body);font-size:12px}
.ph-1{grid-column:1 / span 4}.ph-2{grid-column:5 / span 3}.ph-3{grid-column:8 / span 4}
.cols{position:relative}
.cols::before{content:"";position:absolute;left:0;right:0;top:calc(20px + 8px + var(--tower) + 8px + 21px);height:2px;background:var(--teal)}
.col{all:unset;box-sizing:border-box;display:flex;flex-direction:column;align-items:center;gap:8px;cursor:pointer;min-width:0;position:relative}
.col .ct{height:20px;font-family:var(--f-mono);font-size:13px;color:var(--ink);font-variant-numeric:tabular-nums}
.col .tower{height:var(--tower);width:100%;display:flex;flex-direction:column-reverse;gap:3px;align-items:stretch}
.col .tower i{display:block;height:var(--bh,12px);background:var(--teal);flex:0 0 auto}
.col .node{width:44px;height:44px;border-radius:50%;background:var(--sheet);border:2px solid var(--teal);display:grid;place-items:center;position:relative;z-index:1}
.col .node svg{width:22px;height:22px;stroke:var(--teal);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.col .lbl{display:flex;flex-direction:column;align-items:center;text-align:center;gap:2px;min-height:58px}
.col .lbl em{font-style:normal;font-family:var(--f-mono);font-size:11px;color:var(--muted)}
.col .lbl b{font-family:var(--f-display);font-weight:600;font-size:15px;line-height:1.15;color:var(--ink)}
.col:hover .node,.col[aria-pressed="true"] .node{background:var(--teal)}
.col:hover .node svg,.col[aria-pressed="true"] .node svg{stroke:var(--paper)}
.col[aria-pressed="true"] .lbl b{color:var(--teal);text-decoration:underline;text-underline-offset:3px}
.col:focus-visible .node{outline:2px solid var(--teal);outline-offset:3px}
.col.is-gap .tower{border:1.5px dashed var(--amber);background:var(--amber-soft);justify-content:center;align-items:center}
.col.is-gap .tower span{font-family:var(--f-mono);font-size:11px;color:var(--amber);writing-mode:vertical-rl;transform:rotate(180deg);letter-spacing:.06em}
.col.is-gap .node{border-color:var(--amber);border-style:dashed}
.col.is-gap .node svg{stroke:var(--amber)}
.col.is-gap .ct{color:var(--amber)}
.col.is-scope{cursor:default}
.col.is-scope .tower{background-image:repeating-linear-gradient(135deg,var(--rule) 0 1px,transparent 1px 7px);border:1px solid var(--rule);justify-content:center;align-items:center}
.col.is-scope .tower span{font-family:var(--f-mono);font-size:11px;color:var(--muted);writing-mode:vertical-rl;transform:rotate(180deg);background:rgba(255,255,255,.85);padding:6px 2px}
.col.is-scope .node{border-color:var(--rule-strong);border-style:dashed}
.col.is-scope .node svg{stroke:var(--muted)}
.col.is-scope:hover .node{background:var(--sheet)}
.col.is-scope:hover .node svg{stroke:var(--muted)}
.legend{display:flex;flex-wrap:wrap;gap:10px 28px;align-items:center;font-size:13px;color:var(--muted);padding-top:12px;border-top:1px solid var(--rule)}
.legend span{display:inline-flex;align-items:center;gap:8px}
.legend .k1{width:16px;height:10px;background:var(--teal)}
.legend .k2{width:16px;height:10px;border:1.5px dashed var(--amber);background:var(--amber-soft)}
.legend .k3{width:16px;height:10px;border:1px solid var(--rule);background-image:repeating-linear-gradient(135deg,var(--rule) 0 1px,transparent 1px 4px)}
.reading{margin:0;font-size:16px;line-height:1.6;max-width:80ch;padding-left:14px;border-left:2px solid var(--amber)}

/* Vertical drawing for narrow screens */
.vdraw{display:none;flex-direction:column;position:relative;padding-left:4px}
.vdraw::before{content:"";position:absolute;left:25px;top:8px;bottom:8px;width:2px;background:var(--teal)}
.vphase{font-family:var(--f-mono);font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--teal);padding:14px 0 6px 60px}
.vrow{all:unset;box-sizing:border-box;display:grid;grid-template-columns:44px minmax(0,1fr) 28px;align-items:center;gap:12px;padding:6px 0;cursor:pointer}
.vrow .node{width:44px;height:44px;border-radius:50%;background:var(--sheet);border:2px solid var(--teal);display:grid;place-items:center;position:relative;z-index:1}
.vrow .node svg{width:20px;height:20px;stroke:var(--teal);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.vrow .mid{display:flex;flex-direction:column;gap:5px;min-width:0}
.vrow .mid b{font-family:var(--f-display);font-weight:600;font-size:16px;line-height:1.2}
.vrow .bar{display:flex;flex-wrap:wrap;gap:3px}
.vrow .bar i{width:10px;height:10px;background:var(--teal);display:block}
.vrow .gapnote{font-family:var(--f-mono);font-size:11px;color:var(--amber)}
.vrow .ct{font-family:var(--f-mono);font-size:13px;text-align:right}
.vrow[aria-pressed="true"] .node{background:var(--teal)}
.vrow[aria-pressed="true"] .node svg{stroke:var(--paper)}
.vrow.is-gap .node{border-color:var(--amber);border-style:dashed}
.vrow.is-gap .node svg,.vrow.is-gap .ct{stroke:var(--amber);color:var(--amber)}
.vrow.is-scope{cursor:default}
.vrow.is-scope .node{border-color:var(--rule-strong);border-style:dashed}
.vrow.is-scope .node svg{stroke:var(--muted)}
@media (max-width:860px){.hdraw{display:none}.vdraw{display:flex}.drawing{padding:18px 14px}}

/* Directory */
.filters{display:flex;flex-wrap:wrap;gap:10px;align-items:end}
.filters label{display:flex;flex-direction:column;gap:4px;font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);min-width:0;max-width:100%}
.filters select,.filters input{font:inherit;font-family:var(--f-body);font-size:15px;text-transform:none;letter-spacing:0;color:var(--ink);background:var(--sheet);border:1px solid var(--rule-strong);border-radius:0;padding:9px 10px;min-height:44px;max-width:100%}
.filters .grow{flex:1 1 220px}
.filters .grow input{width:100%}
.filters button{font:inherit;font-family:var(--f-mono);font-size:13px;min-height:44px;padding:0 14px;background:transparent;color:var(--teal);border:1px solid var(--teal);cursor:pointer}
.count{font-family:var(--f-mono);font-size:12px;color:var(--muted)}
.dir{display:flex;flex-direction:column;border-top:2px solid var(--teal)}
.org{padding:22px 0 8px;border-bottom:1px solid var(--rule-strong)}
.org-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px;padding-bottom:6px}
.org-head .n{font-family:var(--f-mono);font-size:12px;color:var(--muted)}
.prog{display:grid;grid-template-columns:minmax(0,250px) minmax(0,1fr) minmax(0,220px);gap:10px 28px;padding:14px 0;border-top:1px solid var(--rule)}
.prog:first-of-type{border-top:0}
@media (max-width:900px){.prog{grid-template-columns:1fr}}
.prog .pn{display:flex;flex-direction:column;gap:7px;min-width:0}
.prog .pn strong{font-family:var(--f-display);font-weight:600;font-size:17px;line-height:1.25;color:var(--teal)}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-family:var(--f-mono);font-size:11px;letter-spacing:.03em;padding:3px 7px;border:1px solid var(--rule-strong);color:var(--muted);white-space:nowrap}
.chip.mat{border-color:var(--teal);color:var(--teal);background:var(--teal-soft)}
.chip.mat-retired,.chip.mat-adjacent,.chip.mat-announced,.chip.scope-adj{border-color:var(--amber);color:var(--amber);background:var(--amber-soft)}
.prog .ev{margin:0;font-size:15px;line-height:1.6;min-width:0}
.prog .src{display:flex;flex-direction:column;gap:4px;font-size:13px;min-width:0}
.prog .src a{overflow-wrap:anywhere}
.prog .dt{font-family:var(--f-mono);font-size:12px;color:var(--muted)}
.empty{padding:28px 0;color:var(--muted)}

/* Corrections */
ol.log{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
ol.log li{display:grid;grid-template-columns:120px minmax(0,1fr);gap:16px;padding:12px 0;border-bottom:1px solid var(--rule);font-size:15px}
@media (max-width:520px){ol.log li{grid-template-columns:1fr;gap:2px}}
ol.log time{font-family:var(--f-mono);font-size:13px;color:var(--muted)}

/* Related writing and citation */
ol.related{list-style:none;margin:0;padding:0;border-top:2px solid var(--teal)}
ol.related li{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 24px;align-items:baseline;padding:14px 0;border-bottom:1px solid var(--rule)}
ol.related a{font-family:var(--f-display);font-weight:600;font-size:19px;line-height:1.25;color:var(--teal);text-decoration:none}
ol.related a:hover{text-decoration:underline;text-underline-offset:3px}
ol.related span{font-family:var(--f-mono);font-size:12px;color:var(--muted)}
@media (max-width:620px){ol.related li{grid-template-columns:1fr}}
.cite .cite-line{margin:0;font-family:var(--f-mono);font-size:13px;line-height:1.7;color:var(--ink);background:rgba(255,255,255,.6);border:1px solid var(--rule);padding:14px 16px;overflow-wrap:anywhere;max-width:100%}

/* Contact: a quiet line */
.contact-note{margin:0;padding-block:28px 48px;font-size:14px;color:var(--muted);max-width:72ch}
.contact-note a{color:var(--teal);overflow-wrap:anywhere}

/* Projects index */
.cards{display:flex;flex-direction:column;gap:20px;padding-bottom:56px}
.card{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,380px);gap:24px 44px;padding:28px;background:var(--sheet);border:1px solid var(--rule-strong);text-decoration:none;color:var(--ink)}
.card:hover{border-color:var(--teal)}
@media (max-width:820px){.card{grid-template-columns:1fr}}
.card .txt{display:flex;flex-direction:column;gap:12px;min-width:0}
.card h2{font-size:clamp(26px,3vw,34px)}
.card .go{font-family:var(--f-mono);font-size:13px;color:var(--teal);margin-top:4px}
.status{font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;padding:3px 8px;background:var(--teal-soft);color:var(--teal);align-self:flex-start}
.mini{display:grid;grid-template-columns:repeat(11,minmax(0,1fr));gap:5px;align-items:end;padding:16px 14px 10px;border:1px solid var(--rule);background-color:var(--paper);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:16px 16px;position:relative;min-height:170px}
.mini .mc{display:flex;flex-direction:column;justify-content:flex-end;min-width:0}
.mini .b{display:flex;flex-direction:column-reverse;gap:2px}
.mini i{display:block;height:7px;background:var(--teal)}
.mini .b.g{border:1px dashed var(--amber);background:var(--amber-soft);height:40px}
.mini .b.s{border:1px solid var(--rule);background-image:repeating-linear-gradient(135deg,var(--rule) 0 1px,transparent 1px 4px);height:40px}
.mini em{font-style:normal;font-family:var(--f-mono);font-size:9px;color:var(--muted);text-align:center;border-top:2px solid var(--teal);padding-top:3px;margin-top:4px}
@media (prefers-reduced-motion:no-preference){.col .node,.card{transition:background-color .15s,border-color .15s}}