/* ============================================================
   Research and Thoughts — engineering-drawing design system
   Dark-first. Light theme = the same drawing, printed on paper.
   ============================================================ */
:root{
  --ground:#0A0D13;      /* sheet ground, near-black with blue bias */
  --plate:#111621;       /* the drawing sheet */
  --plate-2:#161C29;     /* inset blocks */
  --rule:#202939;        /* hairline */
  --rule-2:#2E3A50;      /* emphasised hairline */
  --ink:#E7EBF3;         /* chalk */
  --ink-2:#93A0B6;       /* blue-biased grey */
  --ink-3:#657288;       /* faintest annotation */
  --then:#C9884F;        /* oxidised brass — the 1996–2002 layer */
  --then-dim:#3A2A1B;
  --then-rule:#4C3722;
  --now:#6BA4F8;         /* steel blue, the u(y) plot line — the 2026 layer */
  --now-dim:#152640;
  --focus:#6BA4F8;
  /* figures are mounted on paper in both themes, so their ink is fixed */
  --mount:#F1F0EB;
  --fig-ink:#20262F; --fig-accent:#1F5FBF; --fig-brass:#8C5320; --fig-dim:#6E737C;
  --sans:"IBM Plex Sans Condensed","Helvetica Neue Condensed","Arial Narrow",Helvetica,Arial,sans-serif;
  --serif:"IBM Plex Serif",Georgia,"Times New Roman",serif;
  --mono:"IBM Plex Mono","SF Mono",Menlo,Consolas,monospace;
  --rail:104px;
  color-scheme:dark;
}
@media (prefers-color-scheme:light){
  :root:not([data-theme="dark"]){
    --ground:#EEEDE8; --plate:#FCFCFA; --plate-2:#F3F2EE;
    --rule:#D7D5CD; --rule-2:#B3B0A6;
    --ink:#16191F; --ink-2:#5A6070; --ink-3:#878D9B;
    --then:#8C5320; --then-dim:#F0E3D6; --then-rule:#D6BC9C;
    --now:#1F5FBF; --now-dim:#E1EAF8;
    --focus:#1F5FBF;
    color-scheme:light;
  }
}
:root[data-theme="light"]{
  --ground:#EEEDE8; --plate:#FCFCFA; --plate-2:#F3F2EE;
  --rule:#D7D5CD; --rule-2:#B3B0A6;
  --ink:#16191F; --ink-2:#5A6070; --ink-3:#878D9B;
  --then:#8C5320; --then-dim:#F0E3D6; --then-rule:#D6BC9C;
  --now:#1F5FBF; --now-dim:#E1EAF8;
  --focus:#1F5FBF;
  color-scheme:light;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--ground);color:var(--ink);
  font-family:var(--serif);font-size:17px;line-height:1.62;
  -webkit-font-smoothing:antialiased;
}
img,video{max-width:100%;display:block}
a{color:inherit}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px}

/* ---------- masthead ---------- */
header.bar{
  position:sticky;top:0;z-index:40;
  background:color-mix(in srgb,var(--ground) 88%,transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rule);
}
header.bar .bar-in{max-width:1148px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:20px;height:54px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;flex:0 0 auto}
.brand svg{width:19px;height:23px;flex:0 0 auto}
.brand b{font-family:var(--sans);font-weight:600;font-size:16px;letter-spacing:.005em}
header.bar nav{margin-left:auto;display:flex;gap:2px;align-items:center;overflow-x:auto;scrollbar-width:none}
header.bar nav::-webkit-scrollbar{display:none}
header.bar nav a{
  font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;
  color:var(--ink-2);text-decoration:none;padding:7px 9px;white-space:nowrap;
  border-bottom:2px solid transparent;transition:color .18s,border-color .18s;
}
header.bar nav a:hover{color:var(--ink)}
header.bar nav a[aria-current="true"]{color:var(--ink);border-bottom-color:var(--now)}
.tgl{
  flex:0 0 auto;margin-left:6px;background:none;border:1px solid var(--rule);
  color:var(--ink-2);font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;
  text-transform:uppercase;padding:6px 9px;cursor:pointer;transition:border-color .18s,color .18s;
}
.tgl:hover{border-color:var(--rule-2);color:var(--ink)}

/* ---------- hero ---------- */
.hero{position:relative;border-bottom:1px solid var(--rule);background:#080B11;overflow:hidden}
.hero-media{position:absolute;inset:0}
.hero-media video,.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,#080B11 0%,rgba(8,11,17,.86) 34%,rgba(8,11,17,.30) 62%,rgba(8,11,17,.58) 100%),
             linear-gradient(180deg,rgba(8,11,17,.5) 0%,transparent 22%,transparent 60%,rgba(8,11,17,.88) 100%);
}
.hero-in{
  position:relative;max-width:1148px;margin:0 auto;padding:0 20px;
  min-height:clamp(330px,50vh,500px);display:flex;flex-direction:column;justify-content:center;
  padding-block:clamp(52px,8vw,80px);
}
.hero h1{
  font-family:var(--sans);font-weight:700;color:#F2F5FA;
  font-size:clamp(44px,8.2vw,96px);line-height:.95;letter-spacing:-.018em;
  margin:0 0 20px;text-wrap:balance;max-width:13ch;
}
.hero .strap{
  font-family:var(--mono);font-size:clamp(11px,1.5vw,13px);letter-spacing:.16em;text-transform:uppercase;
  color:#9FB4D4;margin:0 0 22px;
}
.hero .strap em{font-style:normal;color:var(--now)}
.hero .lede{font-size:clamp(17px,2.1vw,20px);line-height:1.55;color:#C9D3E4;max-width:54ch;margin:0}
.hero-cap{
  position:relative;max-width:1148px;margin:0 auto;padding:0 20px 16px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;color:#6D7E99;
}
.rise{animation:rise .7s cubic-bezier(.2,.7,.3,1) both}
.rise-2{animation-delay:.08s}
.rise-3{animation-delay:.16s}
@keyframes rise{from{opacity:.001;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ---------- statement band ---------- */
.band{border-bottom:1px solid var(--rule);background:var(--plate)}
.band-in{
  max-width:1148px;margin:0 auto;padding:34px 20px;
  display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:34px 56px;align-items:start;
}
.band p{margin:0;max-width:62ch;font-size:18px;color:var(--ink-2)}
.band p b{color:var(--ink);font-weight:500}
.tblock{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--rule-2)}
.tblock div{padding:12px 14px 12px 0}
.tblock div+div{border-left:1px solid var(--rule);padding-left:14px}
.tblock .v{
  font-family:var(--sans);font-weight:600;font-size:30px;line-height:1;
  letter-spacing:-.02em;color:var(--ink);font-variant-numeric:tabular-nums;
}
.tblock .k{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-top:8px;line-height:1.4}

/* ---------- layout: year rail + sheets ---------- */
.wrap{max-width:1148px;margin:0 auto;padding:0 20px;display:grid;grid-template-columns:var(--rail) minmax(0,1fr)}
.rail{position:sticky;top:54px;align-self:start;height:calc(100vh - 54px);padding:40px 0;display:flex}
.axis{position:relative;width:100%;border-right:1px solid var(--rule);padding-right:14px}
.axis ol{list-style:none;margin:0;padding:0;height:100%;position:relative}
.axis li{position:absolute;right:14px;display:flex;align-items:center;gap:8px;transform:translateY(-50%)}
.axis .yr{
  font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--ink-3);
  font-variant-numeric:tabular-nums;transition:color .25s;
}
.axis .tk{display:block;width:14px;height:1px;background:var(--rule-2);transform-origin:right center;transition:width .25s,background .25s}
.axis li[data-on="1"] .yr{color:var(--ink)}
.axis li[data-on="1"] .tk{width:26px;background:var(--now)}
.axis .gap{
  position:absolute;right:14px;writing-mode:vertical-rl;
  font-family:var(--mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-3);opacity:.7;
}
.draw{animation:draw .5s ease-out both}
@keyframes draw{from{transform:scaleX(0)}to{transform:none}}

main{padding:0 0 0 34px;min-width:0}

/* ---------- collection heading ---------- */
.coll{padding:56px 0 0;scroll-margin-top:74px}
.coll-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 18px;padding-bottom:14px;border-bottom:1px solid var(--rule-2);margin-bottom:8px}
.coll-head h2{
  font-family:var(--sans);font-weight:600;font-size:clamp(26px,3.4vw,36px);
  line-height:1.05;letter-spacing:-.015em;margin:0;text-wrap:balance;
}
.coll-head .meta{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--then);margin-left:auto}
.coll-note{font-size:16px;color:var(--ink-2);margin:14px 0 26px;max-width:66ch}

/* ---------- the plate (one piece of work) ---------- */
article.plate{position:relative;background:var(--plate);border:1px solid var(--rule);margin:0 0 18px;transition:border-color .22s}
article.plate:hover{border-color:var(--rule-2)}
article.plate::before,articlearticle.plate::after{
  content:"";position:absolute;width:9px;height:9px;pointer-events:none;
  border-color:var(--rule-2);transition:width .22s,height .22s,border-color .22s;
}
article.plate::before{top:-1px;left:-1px;border-top:1px solid;border-left:1px solid}
article.plate::after{bottom:-1px;right:-1px;border-bottom:1px solid;border-right:1px solid}
article.plate:hover::before,article.plate:hover::after{width:17px;height:17px;border-color:var(--then)}

.title-block{
  display:flex;flex-wrap:wrap;border-bottom:1px solid var(--rule);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;
}
.title-block span{padding:9px 14px;color:var(--ink-3);border-right:1px solid var(--rule)}
.title-block span b{color:var(--ink-2);font-weight:400}
.title-block .yr{color:var(--then);font-weight:500;letter-spacing:.12em}
.title-block .yr.now{color:var(--now)}

.plate-body{padding:22px 26px 24px;display:grid;grid-template-columns:minmax(0,1fr) 296px;gap:22px 32px;align-items:start}
.col{min-width:0}
article.plate h3{
  font-family:var(--sans);font-weight:600;font-size:clamp(20px,2.3vw,25px);line-height:1.18;
  letter-spacing:-.01em;margin:0 0 14px;text-wrap:balance;max-width:36ch;
}
.abstract{position:relative;padding-left:18px;border-left:2px solid var(--then-rule)}
.abstract.new{border-left-color:var(--now)}
.abstract .lbl{
  display:block;font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--then);margin-bottom:9px;
}
.abstract.new .lbl{color:var(--now)}
.abstract p{margin:0 0 12px;color:var(--ink-2);font-size:16.5px}
.abstract p:last-child{margin-bottom:0}
details.more{margin-top:8px}
details.more summary{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-3);cursor:pointer;list-style:none;padding:4px 0;
}
details.more summary::-webkit-details-marker{display:none}
details.more summary::before{content:"+ ";color:var(--then)}
details[open].more summary::before{content:"– "}
details.more summary:hover{color:var(--ink)}

/* ---------- figure: a plate mounted on paper ---------- */
.fig{margin:0}
.mount{
  position:relative;aspect-ratio:4/3;background:var(--mount);border:1px solid var(--rule-2);
  display:grid;place-items:center;padding:10px;overflow:hidden;
}
.mount img{width:100%;height:100%;object-fit:contain}
.mount svg{width:100%;height:100%;stroke-linecap:round;stroke-linejoin:round}
.fig figcaption{
  font-family:var(--mono);font-size:11px;letter-spacing:.01em;line-height:1.6;
  color:var(--ink-3);margin-top:10px;
}
.fig figcaption b{color:var(--ink-2);font-weight:500;text-transform:uppercase;letter-spacing:.08em;font-size:10px}

/* figure line-work — fixed palette, since every figure sits on paper */
.mount .ink,.mount .hatch{stroke:var(--fig-ink);fill:none;stroke-width:1.1}
.mount .thin{stroke-width:.8}
.mount .hatch{stroke-width:.8}
.mount .dash{stroke-dasharray:4 3}
.mount .grid{opacity:.45}
.mount .accent{stroke:var(--fig-accent);fill:none;stroke-width:2}
.mount .accent-s{stroke:var(--fig-accent);fill:none;stroke-width:1}
.mount .accent-f{fill:var(--fig-accent);stroke:none}
.mount .brass{stroke:var(--fig-brass);fill:none;stroke-width:1.6}
.mount .brass-f{fill:var(--fig-brass);stroke:none}
.mount .dot{fill:var(--fig-accent);stroke:none}
.mount .lab text{font-family:var(--mono);font-size:10px;letter-spacing:.03em;text-transform:uppercase;fill:var(--fig-dim);stroke:none}
.mount .acct{fill:var(--fig-accent)}
.mount .brasst{fill:var(--fig-brass)}
.mount .dim{fill:var(--fig-dim)}
.mount .onfill{fill:#fff}

.files{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.file{
  display:inline-flex;align-items:center;gap:9px;text-decoration:none;
  border:1px solid var(--rule);padding:7px 12px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-2);
  transition:border-color .18s,color .18s,background .18s;
}
.file:hover{border-color:var(--then);color:var(--ink);background:var(--then-dim)}
.file i{font-style:normal;color:var(--ink-3)}

/* ---------- revision block (the 2026 layer) ---------- */
.rev{border-top:1px solid var(--rule);background:var(--plate-2);padding:20px 26px 24px;position:relative}
.rev::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--now)}
.rev-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 14px;margin-bottom:12px}
.rev-tag{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--now);border:1px solid var(--now);padding:3px 8px;
}
.rev-head .when{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}
.rev h4{font-family:var(--sans);font-weight:600;font-size:19px;line-height:1.25;margin:0 0 10px;max-width:46ch;text-wrap:balance}
.rev p{margin:0 0 14px;color:var(--ink-2);font-size:16px;max-width:66ch}

.tally{display:flex;flex-wrap:wrap;border-top:1px solid var(--rule);margin:14px 0 16px}
.tally div{padding:11px 18px 11px 0;min-width:92px}
.tally div+div{border-left:1px solid var(--rule);padding-left:18px}
.tally .n{font-family:var(--sans);font-weight:600;font-size:24px;line-height:1;color:var(--now);font-variant-numeric:tabular-nums}
.tally .n.low{color:var(--ink-2)}
.tally .l{font-family:var(--mono);font-size:10px;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3);margin-top:7px;line-height:1.4}

.delta{display:grid;grid-template-columns:auto 1fr;gap:7px 16px;margin:14px 0 16px;font-family:var(--mono);font-size:12px;max-width:62ch}
.delta dt{color:var(--ink-3);letter-spacing:.07em;text-transform:uppercase;font-size:10.5px;padding-top:2px}
.delta dd{margin:0;color:var(--ink-2);display:flex;flex-wrap:wrap;gap:6px 10px;align-items:baseline}
.delta dd .a{color:var(--then)}
.delta dd .arw{color:var(--ink-3)}
.delta dd .b{color:var(--now)}

.go{
  display:inline-flex;align-items:center;gap:10px;text-decoration:none;
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--now);border-bottom:1px solid var(--now-dim);padding-bottom:3px;
  transition:border-color .18s,gap .18s;
}
.go:hover{border-bottom-color:var(--now);gap:14px}
.go span{transition:transform .18s}
.go:hover span{transform:translateX(2px)}
.rev-actions{display:flex;flex-wrap:wrap;gap:12px 26px;align-items:center;margin-top:4px}

/* ---------- numbered points on the recent articles ---------- */
.points{counter-reset:pt;list-style:none;margin:16px 0 0;padding:0;border-top:1px solid var(--rule)}
.points li{
  display:grid;grid-template-columns:24px 1fr;gap:12px;padding:10px 0;
  border-bottom:1px solid var(--rule);font-size:16px;color:var(--ink-2);
}
.points li::before{
  content:counter(pt);counter-increment:pt;
  font-family:var(--mono);font-size:11px;color:var(--now);padding-top:5px;
}

/* ---------- software ---------- */
.sw-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:18px;margin-top:8px}
.sw{position:relative;background:var(--plate);border:1px solid var(--rule);display:flex;flex-direction:column;transition:border-color .22s}
.sw:hover{border-color:var(--rule-2)}
.sw .cap{padding:20px 22px 0}
.sw h3{font-family:var(--sans);font-weight:600;font-size:22px;margin:0 0 4px;letter-spacing:-.005em}
.sw .kind{font-family:var(--mono);font-size:10.5px;letter-spacing:.11em;text-transform:uppercase;color:var(--now);margin-bottom:12px}
.sw p{margin:0 0 16px;font-size:16px;color:var(--ink-2)}
.sw dl{margin:auto 0 0;border-top:1px solid var(--rule);display:grid;grid-template-columns:auto 1fr;font-family:var(--mono);font-size:11px}
.sw dt{padding:8px 12px 8px 22px;color:var(--ink-3);letter-spacing:.07em;text-transform:uppercase;font-size:10px;border-bottom:1px solid var(--rule)}
.sw dd{margin:0;padding:8px 22px 8px 0;color:var(--ink-2);border-bottom:1px solid var(--rule);text-align:right}
.sw dl>:nth-last-child(-n+2){border-bottom:0}
.sw .foot{padding:16px 22px 20px;border-top:1px solid var(--rule)}
.slot{border:1px dashed var(--rule-2);background:none;display:flex;align-items:center;justify-content:center;min-height:190px;padding:26px;text-align:center}
.slot p{font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3);margin:0;line-height:1.7;max-width:24ch}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--rule);margin-top:64px;background:var(--plate)}
.foot-in{
  max-width:1148px;margin:0 auto;padding:30px 20px 46px;
  display:flex;flex-wrap:wrap;gap:16px 40px;align-items:baseline;
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);
}
.foot-in a{color:var(--now);text-decoration:none;border-bottom:1px solid var(--now-dim)}
.foot-in a:hover{border-bottom-color:var(--now)}
.foot-in .note{text-transform:none;letter-spacing:.02em;max-width:44ch;line-height:1.7}
.foot-in .note b{color:var(--now);font-weight:500}

/* ---------- responsive ---------- */
@media (max-width:1040px){
  .wrap{grid-template-columns:1fr}
  .rail{display:none}
  main{padding-left:0}
  .band-in{grid-template-columns:1fr}
}
@media (max-width:860px){
  .plate-body{grid-template-columns:1fr}
  .fig{max-width:360px}
}
@media (max-width:640px){
  body{font-size:16px}
  .plate-body{padding:18px 18px 20px}
  .rev{padding:18px 18px 20px}
  .title-block span{padding:8px 11px}
  .tblock{grid-template-columns:1fr 1fr}
  .tblock div:nth-child(3){grid-column:1/-1;border-left:0;padding-left:0;border-top:1px solid var(--rule)}
  .sw .cap{padding:18px 18px 0}
  .sw dt{padding-left:18px}.sw dd{padding-right:18px}
  .sw .foot{padding:14px 18px 18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* ============================================================
   Sub-pages: long-form documents and product pages
   ============================================================ */
header.bar .back{
  font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;
  color:var(--ink-2);text-decoration:none;padding:7px 9px;white-space:nowrap;
  border:1px solid var(--rule);transition:border-color .18s,color .18s;
}
header.bar .back:hover{border-color:var(--then);color:var(--ink)}

.doc{max-width:1148px;margin:0 auto;padding:0 20px 72px}
.doc-head{padding:56px 0 26px;border-bottom:1px solid var(--rule-2)}
.doc-eyebrow{
  font-family:var(--mono);font-size:11px;letter-spacing:.15em;text-transform:uppercase;
  color:var(--now);margin:0 0 16px;
}
.doc-eyebrow.then{color:var(--then)}
.doc h1{
  font-family:var(--sans);font-weight:600;font-size:clamp(32px,5.4vw,58px);
  line-height:1.03;letter-spacing:-.018em;margin:0 0 20px;max-width:22ch;text-wrap:balance;
}
.doc-dek{font-size:clamp(18px,2.2vw,21px);line-height:1.5;color:var(--ink-2);max-width:60ch;margin:0 0 24px;text-wrap:pretty}
.doc-byline{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.05em;line-height:1.7;color:var(--ink-3);
  display:flex;flex-wrap:wrap;gap:4px 24px;
}
.doc-byline b{color:var(--ink-2);font-weight:500}

.doc-body{display:grid;grid-template-columns:minmax(0,1fr) 296px;gap:36px 44px;align-items:start;padding-top:34px}
.doc-main{min-width:0;max-width:68ch}
.doc-main h2{
  font-family:var(--sans);font-weight:600;font-size:clamp(22px,2.8vw,28px);line-height:1.15;
  letter-spacing:-.01em;margin:40px 0 14px;padding-top:24px;border-top:1px solid var(--rule);text-wrap:balance;
}
.doc-main h2:first-child{margin-top:0;padding-top:0;border-top:0}
.doc-main h3{font-family:var(--sans);font-weight:600;font-size:18px;margin:28px 0 8px;letter-spacing:-.005em}
.doc-main p{margin:0 0 18px;color:var(--ink-2);text-wrap:pretty}
.doc-main p.lead{color:var(--ink);font-size:18px}
.doc-main ul{margin:0 0 18px;padding-left:1.1em;color:var(--ink-2)}
.doc-main li{margin-bottom:8px;text-wrap:pretty}
.doc-main strong{color:var(--ink);font-weight:500}

.doc-aside{position:sticky;top:74px;display:grid;gap:22px}
@media (max-width:980px){.doc-aside{position:static}}

.pull{border-left:2px solid var(--now);padding:2px 0 2px 18px;margin:26px 0}
.pull p{font-size:19px;line-height:1.45;color:var(--ink);margin:0}
.pull cite{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);font-style:normal;margin-top:10px}

.sheet-spec{border-top:1px solid var(--rule-2);font-family:var(--mono);font-size:12px}
.sheet-spec div{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-bottom:1px solid var(--rule)}
.sheet-spec dt,.sheet-spec .k{color:var(--ink-3);letter-spacing:.06em;text-transform:uppercase;font-size:10.5px;padding-top:1px}
.sheet-spec dd,.sheet-spec .v{margin:0;color:var(--ink-2);text-align:right}

.cta{border:1px solid var(--rule-2);background:var(--plate);padding:24px 26px}
.cta h2{font-family:var(--sans);font-weight:600;font-size:21px;margin:0 0 10px;border:0;padding:0}
.cta p{margin:0 0 16px;color:var(--ink-2);font-size:16px}
.cta .mail{
  display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:12px;
  letter-spacing:.04em;color:var(--now);text-decoration:none;border-bottom:1px solid var(--now-dim);padding-bottom:3px;
}
.cta .mail:hover{border-bottom-color:var(--now)}

.doc-nav{border-top:1px solid var(--rule-2);margin-top:52px;padding-top:20px;display:flex;flex-wrap:wrap;gap:14px 28px}

@media (max-width:980px){
  .doc-body{grid-template-columns:1fr}
  .doc-aside{max-width:360px}
}

/* ---------- product screenshots ---------- */
.shots{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin:24px 0 10px}
.shots.wide{grid-template-columns:1fr}
.shot{margin:0;border:1px solid var(--rule-2);background:var(--plate-2);padding:8px;transition:border-color .22s}
.shot:hover{border-color:var(--then)}
.shot img{width:100%;height:auto;display:block}
.shot figcaption{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.02em;line-height:1.55;
  color:var(--ink-3);padding:9px 4px 2px;
}
.shot figcaption b{color:var(--ink-2);font-weight:500;text-transform:uppercase;letter-spacing:.08em;font-size:9.5px}
.filmstrip{margin:24px 0 10px;border:1px solid var(--rule-2);background:var(--plate-2);padding:8px}
.filmstrip video{width:100%;height:auto;display:block;background:#000}
.filmstrip figcaption{font-family:var(--mono);font-size:10.5px;line-height:1.55;color:var(--ink-3);padding:9px 4px 2px}
.appmark{display:flex;align-items:center;gap:14px;margin:0 0 18px}
.appmark img{width:46px;height:46px;display:block}
.shot a{display:block;border:0;text-decoration:none}
.shot a:focus-visible{outline:2px solid var(--focus);outline-offset:2px}

/* ---------- softened corners on mounted imagery (frames stay square) ---------- */
.mount{border-radius:9px}
.mount img{border-radius:5px}
.shot{border-radius:9px}
.shot img{border-radius:5px}
.filmstrip{border-radius:9px}
.filmstrip video{border-radius:5px}

/* ---------- transcript before/after ---------- */
.ba{border-top:1px solid var(--rule-2);margin:24px 0 8px}
.ba-row{display:grid;grid-template-columns:76px minmax(0,1fr);gap:6px 18px;padding:13px 0;border-bottom:1px solid var(--rule)}
.ba-row .lbl{
  font-family:var(--mono);font-size:10px;letter-spacing:.13em;text-transform:uppercase;
  color:var(--then);padding-top:5px;
}
.ba-row.out .lbl{color:var(--now)}
.ba-row p{margin:0;font-size:16.5px;color:var(--ink-3);text-wrap:pretty}
.ba-row.out p{color:var(--ink)}
.ba-note{font-family:var(--mono);font-size:10.5px;letter-spacing:.05em;color:var(--ink-3);margin:12px 0 0;line-height:1.6}
@media (max-width:560px){.ba-row{grid-template-columns:1fr}.ba-row .lbl{padding-top:0}}

/* ---------- two-column ledger ---------- */
.ledger{display:grid;grid-template-columns:1fr 1fr;gap:4px 34px;margin:22px 0 8px}
.ledger>div{min-width:0}
.ledger h3{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.13em;text-transform:uppercase;
  margin:0 0 10px;font-weight:500;
}
.ledger .stays h3{color:var(--now)}
.ledger .crosses h3{color:var(--then)}
.ledger ul{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule-2)}
.ledger li{padding:11px 0;border-bottom:1px solid var(--rule);font-size:15.5px;color:var(--ink-2);text-wrap:pretty}
.ledger li b{display:block;font-family:var(--sans);font-weight:600;font-size:14.5px;color:var(--ink);margin-bottom:3px}
@media (max-width:640px){.ledger{grid-template-columns:1fr;gap:22px}}

/* ---------- named rules ---------- */
.rules{list-style:none;margin:20px 0 8px;padding:0;border-top:1px solid var(--rule-2)}
.rules li{padding:13px 0;border-bottom:1px solid var(--rule);font-size:16px;color:var(--ink-2);text-wrap:pretty}
.rules li b{
  display:block;font-family:var(--sans);font-weight:600;font-size:16.5px;color:var(--ink);
  margin-bottom:4px;letter-spacing:-.005em;
}

/* ---------- primary action button ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;text-decoration:none;align-self:flex-start;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.11em;text-transform:uppercase;
  color:var(--now);border:1px solid var(--now);padding:11px 16px;
  transition:background .18s,color .18s,gap .18s;
}
.btn:hover{background:var(--now);color:var(--ground);gap:14px}
.btn span{transition:transform .18s}
.btn:hover span{transform:translateX(2px)}
.cta .btn{margin-top:2px}