/* ══════════════════════════════════════════════════════════════
   The Threadonomist — shared article house style
   ══════════════════════════════════════════════════════════════ */

:root{
  --red:#e3120b;
  --red-ink:#c10f09;
  --paper:#fdfcf8;
  --paper-2:#f3efe6;
  --card:#ffffff;
  --ink:#1a1a1a;
  --ink-2:#4a4a46;
  --ink-3:#66635c;
  --rule:#e2ddd2;
  --rule-2:#d3ccbd;
  --learning:#0a766d;
  --control:#e3120b;
  --drift:#7a5e0a;
  --shadow:0 1px 2px rgba(30,25,15,.05),0 8px 30px rgba(30,25,15,.07);
  --serif:"Source Serif 4",Georgia,"Times New Roman",serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --measure:41rem;
  --wide:64rem;
}
[data-theme="dark"]{
  --red:#ff6258;
  --red-ink:#ff6258;
  --paper:#121316;
  --paper-2:#1a1c20;
  --card:#1c1e23;
  --ink:#ece8df;
  --ink-2:#b4b0a6;
  --ink-3:#8a867c;
  --rule:#2b2e34;
  --rule-2:#3a3e45;
  --learning:#3fbfad;
  --control:#ff6258;
  --drift:#d8b45a;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 40px rgba(0,0,0,.35);
}
@media(prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --red:#ff6258;--red-ink:#ff6258;--paper:#121316;--paper-2:#1a1c20;--card:#1c1e23;
    --ink:#ece8df;--ink-2:#b4b0a6;--ink-3:#8a867c;--rule:#2b2e34;--rule-2:#3a3e45;
    --learning:#3fbfad;--control:#ff6258;--drift:#d8b45a;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 40px rgba(0,0,0,.35);
  }
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--serif);font-size:18px;line-height:1.68;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  transition:background .4s ease,color .4s ease;
}
.skip{position:absolute;left:12px;top:-80px;z-index:80;background:var(--paper);color:var(--ink);padding:9px 13px;
  border:2px solid var(--red);font-family:var(--sans);font-size:14px;font-weight:700;text-decoration:none}
.skip:focus{top:12px}
img{max-width:100%;height:auto;display:block}
b,strong{font-weight:700}
em,i{font-style:italic}
::selection{background:rgba(227,18,11,.16)}

.wrap{max-width:var(--measure);margin-inline:auto;padding-inline:22px}

/* ── reading-progress rail ── */
.progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:60;background:transparent}
.progress span{display:block;height:100%;width:0;background:var(--red);box-shadow:0 0 8px rgba(227,18,11,.5)}

/* ── top bar ── */
.topbar{
  position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding:9px 22px;background:color-mix(in srgb,var(--paper) 88%,transparent);
  backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid var(--rule);
  font-family:var(--sans);font-size:13px;
}
.topbar__mark{color:var(--ink);text-decoration:none}
.topbar__mark b{color:var(--red);font-weight:700}
.topbar__mid{color:var(--ink);font-size:14px;font-weight:700;font-family:var(--serif);letter-spacing:-.01em;
  opacity:0;transform:translateY(4px);transition:.35s;pointer-events:none;
  max-width:56%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.topbar.scrolled .topbar__mid{opacity:1;transform:none}
.theme{border:1px solid var(--rule-2);background:var(--card);color:var(--ink);border-radius:50%;
  width:30px;height:30px;cursor:pointer;font-size:15px;line-height:1;display:grid;place-items:center;transition:.2s}
.theme:hover{border-color:var(--red);color:var(--red)}

/* ── hero ── */
.hero{margin:0 auto;padding:46px 0 0}
.hero__head{max-width:46rem;margin-inline:auto;text-align:center;padding:0 22px}
.rubric{font-family:var(--sans);font-size:13px;font-weight:700;letter-spacing:.01em;margin:0 0 20px;color:var(--ink-2)}
.rubric__sec{color:var(--red)}
.rubric__bar{color:var(--rule-2);margin:0 8px;font-weight:400}
.hero__title{font-size:clamp(2.6rem,6.4vw,4.7rem);line-height:1.03;font-weight:800;letter-spacing:-.02em;margin:.05em auto .34em;max-width:15ch}
.standfirst{font-size:clamp(1.22rem,2.5vw,1.58rem);line-height:1.44;font-weight:400;color:var(--ink-2);margin:0 auto;max-width:33rem}
.hero__img{width:100vw;margin:40px 0 0;margin-left:calc(50% - 50vw)}
.hero__img img{width:100%;height:clamp(300px,54vh,600px);object-fit:cover;object-position:center 42%}
.hero__img--issue-02 img{object-position:center 12%}
.hero__img figcaption{font-family:var(--sans);font-size:11px;color:var(--ink-3);margin:8px auto 0;max-width:var(--wide);padding:0 22px;text-align:right;letter-spacing:.02em}
.dateline{font-family:var(--sans);text-align:center;font-size:12px;color:var(--ink-3);max-width:var(--measure);margin:30px auto 0;padding:0 22px 18px;border-bottom:1px solid var(--rule-2)}
.dateline__bar{color:var(--rule-2);margin:0 9px}
.dateline__loc{text-transform:uppercase;letter-spacing:.1em;font-weight:600;color:var(--ink-2)}

/* ── article body ── */
.article{max-width:var(--measure);margin:26px auto 0;padding:0 22px}
.article p{margin:0 0 1.35em;font-size:1.16rem;line-height:1.72}
.article h2{
  font-size:clamp(1.4rem,3vw,1.9rem);font-weight:800;letter-spacing:-.012em;line-height:1.16;
  margin:2.2em 0 .35em;color:var(--ink);
}

.dropcap::first-letter{
  font-weight:800;font-size:4.6em;line-height:.76;float:left;margin:.02em .09em -.04em 0;color:var(--ink);
}
.lead{font-variant:small-caps;letter-spacing:.02em}

.pullquote{
  font-size:clamp(1.5rem,3.2vw,2rem);line-height:1.28;font-weight:600;color:var(--ink);
  border-left:4px solid var(--red);padding:.1em 0 .1em 1em;margin:1.6em 0 1.7em;letter-spacing:-.01em;
}

.endmark{color:var(--red);font-size:1.1rem;margin-top:2.4em}
.fn{font-size:.6em;font-weight:700;color:var(--red);text-decoration:none;vertical-align:super;padding:0 1px}
.fn:hover{text-decoration:underline}

.src{font-family:var(--sans);font-size:.78em;color:var(--ink-3);letter-spacing:.01em}
.tag{font-family:var(--sans);font-size:.82em;font-weight:600;padding:.05em .5em;border-radius:3px;white-space:nowrap}
.tag--learning{color:var(--learning);background:color-mix(in srgb,var(--learning) 13%,transparent)}
.tag--control{color:var(--red);background:color-mix(in srgb,var(--red) 12%,transparent)}
.tag--drift{color:var(--drift);background:color-mix(in srgb,var(--drift) 16%,transparent)}

/* ── graphics ── */
.graphic{
  max-width:var(--wide);margin:2.6em auto 2.8em;width:100%;
  background:var(--paper-2);border:1px solid var(--rule);border-radius:6px;padding:26px 26px 20px;box-shadow:var(--shadow);
}
@media(min-width:760px){
  .graphic{position:relative;left:50%;translate:-50% 0;width:min(var(--wide),calc(100vw - 44px));margin-inline:0;}
}
.graphic__mount{min-height:60px}
.graphic figcaption{font-family:var(--sans);font-size:13.5px;line-height:1.55;color:var(--ink-2);
  margin-top:18px;padding-top:14px;border-top:1px solid var(--rule)}
.graphic figcaption b{color:var(--ink);font-weight:700}
.graphic--field-evidence{background:transparent;border:0;border-radius:0;box-shadow:none;padding:0}
.graphic--field-evidence figcaption{margin-top:14px;padding-top:12px;border-color:var(--rule-2)}
.graphic__source{display:block;margin-top:4px;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3)}
.graphic__source a{color:var(--red);text-decoration:none;border-bottom:1px solid color-mix(in srgb,var(--red) 35%,transparent)}

/* sticky long-read video */
.blast-story{
  position:relative;max-width:var(--wide);width:100%;margin:2.6em auto 2.8em;
}
.blast-story__sticky{
  overflow:hidden;background:#111;
}
.blast-story__frame{
  position:absolute;inset:0;display:grid;place-items:stretch center;overflow:hidden;isolation:isolate;background:#111
}
.blast-story__frame::after{
  content:"";position:absolute;z-index:1;inset:0;pointer-events:none;
  background:linear-gradient(90deg,rgba(0,0,0,.18),rgba(0,0,0,.02) 52%,rgba(0,0,0,.12)),linear-gradient(0deg,rgba(0,0,0,.3),transparent 30%)
}
.blast-story__ambient{
  position:absolute;z-index:0;inset:-5%;display:block;width:110%;height:110%;object-fit:cover;object-position:50% 34%;
  filter:blur(26px) brightness(.46) saturate(.75);transform:scale(1.05);pointer-events:none
}
.blast-story__video{
  position:absolute;z-index:2;top:0;left:50%;display:block;width:min(64vw,calc((100vh - 49px)*.95));
  width:min(64vw,calc((100svh - 49px)*.95));max-width:calc(100vw - 40px);height:100%;
  object-fit:cover;object-position:50% 40%;background:#111;filter:saturate(.9) contrast(1.06) brightness(.9);
  transform:translateX(calc(-50% + clamp(0px,4vw,64px)))
}
.blast-story__panels{font-family:var(--sans)}
.blast-story__panel{
  display:flex;flex-direction:column;gap:10px;max-width:25rem;padding:24px 26px 25px;
  background:color-mix(in srgb,var(--paper) 96%,transparent);color:var(--ink-2);
  border:1px solid color-mix(in srgb,var(--rule-2) 78%,transparent);border-left:4px solid var(--red);
  border-radius:4px;box-shadow:0 2px 8px rgba(0,0,0,.12),0 16px 44px rgba(0,0,0,.18);
  font-size:16px;line-height:1.52
}
.blast-story__panel b{font-family:var(--serif);font-size:clamp(1.65rem,3vw,2rem);line-height:1.08;letter-spacing:-.015em;color:var(--ink)}
.blast-story__kicker{font-size:10.5px;font-weight:700;line-height:1.35;letter-spacing:.13em;text-transform:uppercase;color:var(--red)}
.blast-story__credit{
  position:absolute;z-index:2;right:clamp(16px,3vw,44px);bottom:14px;max-width:min(34rem,calc(100% - 32px));
  padding:6px 9px;background:rgba(0,0,0,.58);border-radius:3px;color:rgba(255,255,255,.82);
  font-family:var(--sans);font-size:10px;line-height:1.35;text-align:right
}
.blast-story__caption{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);clip-path:inset(50%);white-space:nowrap;border:0
}
@media(min-width:701px){
  .blast-story{
    left:50%;translate:-50% 0;width:100vw;max-width:none;margin-inline:0;display:grid;
  }
  .blast-story__sticky,.blast-story__panels{grid-area:1/1}
  .blast-story__sticky{
    position:sticky;z-index:0;top:49px;align-self:start;width:100%;height:calc(100vh - 49px);height:calc(100svh - 49px)
  }
  .blast-story__panels{
    position:relative;z-index:1;display:grid;align-content:start;row-gap:58vh;
    padding:58vh clamp(22px,6vw,96px) 65vh;pointer-events:none
  }
  .blast-story__panel{margin-right:auto;pointer-events:auto}
}
@media(max-width:700px){
  .blast-story{left:50%;translate:-50% 0;width:100vw;max-width:none;margin:2.3em 0 2.5em;background:var(--paper)}
  .blast-story__sticky{position:relative;top:auto;width:100%;height:auto;aspect-ratio:4/5}
  .blast-story__ambient{display:none}
  .blast-story__video{left:0;width:100%;max-width:none;height:100%;object-position:50% 50%;transform:none}
  .blast-story__panels{display:grid;gap:12px;padding:16px 18px 4px}
  .blast-story__panel{max-width:none;padding:20px 20px 21px;background:var(--paper-2);box-shadow:var(--shadow)}
  .blast-story__credit{right:10px;bottom:9px;max-width:calc(100% - 20px);font-size:9.5px}
}
@media(prefers-reduced-motion:reduce) and (min-width:701px){
  .blast-story{display:block;background:var(--paper)}
  .blast-story__sticky{position:relative;top:auto;height:min(76vh,720px)}
  .blast-story__panels{display:grid;grid-template-columns:repeat(auto-fit,minmax(16rem,1fr));gap:14px;padding:16px clamp(22px,4vw,64px) 4px}
  .blast-story__panel{max-width:none;margin:0;padding:20px;background:var(--paper-2);box-shadow:var(--shadow)}
}

/* autonomy ladder */
.autonomy-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.autonomy-card{
  --accent:var(--learning);background:var(--card);border:1px solid var(--rule);border-top:4px solid var(--accent);
  border-radius:5px;padding:15px 16px 14px;color:var(--ink)
}
.autonomy-card--handoff{--accent:var(--drift)}
.autonomy-card--lethal{--accent:var(--red)}
.autonomy-card__step{
  font-family:var(--sans);font-size:10.5px;font-weight:700;line-height:1.35;letter-spacing:.1em;
  text-transform:uppercase;color:var(--accent);margin:0 0 7px
}
.autonomy-card h3{font-family:var(--sans);font-size:18px;line-height:1.2;letter-spacing:-.01em;margin:0 0 7px;color:var(--ink)}
.autonomy-card>p:not(.autonomy-card__step){font-family:var(--sans);font-size:13px;line-height:1.48;color:var(--ink-2);margin:0}
.autonomy-card .autonomy-card__choice{margin-top:12px;padding-top:10px;border-top:1px solid var(--rule);color:var(--ink)}
@media(max-width:720px){.autonomy-grid{grid-template-columns:1fr}}

/* graphic internals (shared) */
.g-title{font-family:var(--sans);font-weight:700;font-size:12px;letter-spacing:.13em;text-transform:uppercase;color:var(--ink-3);margin:0 0 3px}
.scroll-cue{display:none}
.g-sub{font-family:var(--sans);font-size:13px;color:var(--ink-3);margin:0 0 16px}
svg text{font-family:var(--sans)}

/* cost slider */
.cost-readout{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px;margin-top:2px}
.cost-place{font-family:var(--sans);font-weight:700;font-size:20px;color:var(--ink)}
.cost-desc{font-family:var(--sans);font-size:13.5px;color:var(--ink-2)}
.cost-cost{margin-left:auto;font-family:var(--sans);font-weight:700;font-size:15px;color:var(--red)}
.cost-slider{-webkit-appearance:none;appearance:none;width:100%;height:5px;border-radius:3px;margin:16px 0 4px;
  background:linear-gradient(90deg,var(--learning),var(--drift),var(--red));cursor:pointer;outline:none}
#fig-cost .cost-slider{background:linear-gradient(90deg,var(--rule-2),var(--red))}
.cost-slider:focus-visible{outline:3px solid var(--ink);outline-offset:5px}
.cost-slider::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:#fff;
  border:3px solid var(--ink);box-shadow:0 2px 6px rgba(0,0,0,.25);cursor:grab;transition:transform .1s}
.cost-slider::-webkit-slider-thumb:active{cursor:grabbing;transform:scale(1.12)}
.cost-slider::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:#fff;border:3px solid var(--ink);cursor:grab}
.cost-ends{display:flex;justify-content:space-between;font-family:var(--sans);font-size:11.5px;color:var(--ink-3);text-transform:uppercase;letter-spacing:.08em}

/* players grid */
.players{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:720px){.players{grid-template-columns:1fr}}
.pcol__head{font-family:var(--sans);font-weight:700;font-size:13px;letter-spacing:.03em;padding:6px 0 10px;
  border-bottom:2px solid currentColor;margin-bottom:12px}
.pcol--learning .pcol__head{color:var(--learning)}
.pcol--control .pcol__head{color:var(--red)}
.pcol--drift .pcol__head{color:var(--drift)}
.pcard{display:block;width:100%;background:var(--card);color:var(--ink);border:1px solid var(--rule);border-left:3px solid var(--accent);border-radius:4px;
  padding:11px 13px;margin-bottom:10px;cursor:pointer;transition:.18s;text-align:left;font:inherit}
.pcard:not(.pcard--static):hover,.pcard:not(.pcard--static).open{border-color:var(--rule-2);box-shadow:var(--shadow);transform:translateY(-1px)}
.pcard--static{cursor:default}
.pcard__head{font-family:var(--sans);font-size:14.5px;font-weight:700;margin:0;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:8px}
.pcard .where{font-family:var(--sans);font-size:11px;font-weight:500;color:var(--ink-3);text-transform:uppercase;letter-spacing:.06em}
.pcard__detail{font-family:var(--sans);font-size:13px;line-height:1.5;color:var(--ink-2);margin:0;
  display:grid;grid-template-rows:0fr;opacity:0;transition:grid-template-rows .34s cubic-bezier(.3,.8,.3,1),opacity .3s ease,margin .3s ease}
.pcard__detail>span{min-height:0;overflow:hidden}
.pcard.open .pcard__detail{grid-template-rows:1fr;opacity:1;margin-top:9px}

/* field evidence — direct experiment, inference and the deliberate break before blast */
.field-evidence,.field-evidence__fallback{font-family:var(--sans);border-top:3px solid var(--ink);padding-top:14px}
.field-evidence__intro{display:grid;grid-template-columns:minmax(190px,.7fr) minmax(0,1.55fr);gap:24px;align-items:start;margin-bottom:18px}
.article .field-evidence__intro .g-title,.article .field-evidence__fallback .g-title{font-size:12px;line-height:1.35;margin:1px 0 0;color:var(--ink)}
.article .field-evidence__deck{font-family:var(--sans);font-size:13.5px;line-height:1.48;color:var(--ink-2);margin:0}
.field-evidence__path{position:relative;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.field-evidence__rail{position:absolute;z-index:0;top:10px;left:12.5%;right:12.5%;height:22px;display:grid;grid-template-columns:repeat(3,1fr);align-items:center;pointer-events:none}
.field-evidence__segment{display:block;height:2px}
.field-evidence__segment--causal{background:var(--learning)}
.field-evidence__segment--inferred{background:repeating-linear-gradient(90deg,var(--drift) 0 6px,transparent 6px 11px)}
.field-evidence__segment--gap{height:22px;display:grid;grid-template-columns:1fr 22px 1fr;align-items:center}
.field-evidence__segment--gap i{display:block;height:2px}
.field-evidence__segment--gap i:first-child{background:repeating-linear-gradient(90deg,var(--drift) 0 6px,transparent 6px 11px)}
.field-evidence__segment--gap i:last-child{background:var(--red)}
.field-evidence__segment--gap b{width:20px;height:20px;display:grid;place-items:center;justify-self:center;border:1px solid var(--red);border-radius:50%;background:var(--paper);color:var(--red);font-size:11px;line-height:1}
.field-evidence__step{--step-tone:var(--drift);position:relative;z-index:1;display:flex;min-width:0;min-height:101px;flex-direction:column;align-items:center;border:0;border-radius:5px;background:transparent;color:var(--ink);padding:0 7px 10px;text-align:center;cursor:pointer;font-family:var(--sans);transition:background .18s ease}
.field-evidence__step--learning{--step-tone:var(--learning)}
.field-evidence__step--drift{--step-tone:var(--drift)}
.field-evidence__step--red{--step-tone:var(--red)}
.field-evidence__dot{width:22px;height:22px;display:grid;place-items:center;flex:none;margin:0 auto 9px;border:2px solid var(--step-tone);border-radius:50%;background:var(--paper);color:var(--step-tone);font-size:11px;font-weight:700;line-height:1;transition:transform .18s ease,background .18s ease,color .18s ease,box-shadow .18s ease}
.field-evidence__status{font-size:11px;font-weight:700;line-height:1.25;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
.field-evidence__step-title{font-size:15.5px;font-weight:700;line-height:1.22;letter-spacing:-.01em;margin-top:3px;color:var(--ink)}
.field-evidence__step-meta{font-size:11px;line-height:1.3;color:var(--ink-3);margin-top:3px}
.field-evidence__step:hover{background:color-mix(in srgb,var(--step-tone) 5%,transparent)}
.field-evidence__step:hover .field-evidence__dot{transform:scale(1.08)}
.field-evidence__step[aria-pressed="true"]{background:color-mix(in srgb,var(--step-tone) 8%,transparent)}
.field-evidence__step[aria-pressed="true"] .field-evidence__dot{background:var(--step-tone);color:var(--paper);box-shadow:0 0 0 5px color-mix(in srgb,var(--step-tone) 15%,transparent)}
.field-evidence__step[aria-pressed="true"] .field-evidence__status{color:var(--step-tone)}
.field-evidence__detail{display:grid;grid-template-columns:minmax(145px,.72fr) repeat(3,minmax(0,1fr));gap:20px;min-height:164px;padding:17px 0 16px;border-top:2px solid var(--field-tone);border-bottom:1px solid var(--rule-2)}
.field-evidence__identity{display:flex;flex-direction:column;align-items:flex-start}
.field-evidence__identity-status,.field-evidence__fact b{font-size:11px;font-weight:700;line-height:1.25;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
.field-evidence__identity-status{color:var(--field-tone)}
.field-evidence__identity h4{font-family:var(--sans);font-size:20px;line-height:1.15;letter-spacing:-.015em;color:var(--ink);margin:5px 0 4px}
.field-evidence__identity>span:last-child{font-size:11px;line-height:1.35;color:var(--ink-3)}
.field-evidence__fact{display:flex;flex-direction:column;gap:7px;min-width:0}
.field-evidence__fact span{font-size:12.5px;line-height:1.48;color:var(--ink-2)}
.field-evidence__fact--limit b{color:var(--red)}
.field-evidence__fallback ol{list-style:none;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin:17px 0 0;padding:0;counter-reset:field-fallback}
.field-evidence__fallback li{counter-increment:field-fallback;font-family:var(--sans);font-size:12.5px;line-height:1.48;color:var(--ink-2);padding-top:10px;border-top:2px solid var(--learning)}
.field-evidence__fallback li:nth-child(3){border-color:var(--drift)}
.field-evidence__fallback li:nth-child(4){border-color:var(--red)}
.field-evidence__fallback li::before{content:counter(field-fallback);display:block;font-size:11px;font-weight:700;color:var(--ink-3);margin-bottom:5px}
.field-evidence__fallback b{display:block;color:var(--ink);margin-bottom:3px}
@media(max-width:600px){
  .graphic--field-evidence{padding:0}
  .field-evidence,.field-evidence__fallback{padding-top:11px}
  .field-evidence__intro{grid-template-columns:1fr;gap:4px;margin-bottom:13px}
  .article .field-evidence__deck{font-size:12px;line-height:1.42}
  .field-evidence__path{gap:0}
  .field-evidence__step{min-height:75px;padding:0 2px 7px}
  .field-evidence__dot{width:20px;height:20px;margin-bottom:7px;font-size:11px}
  .field-evidence__status,.field-evidence__step-meta{display:none}
  .field-evidence__step-title{font-size:11.5px;line-height:1.18;margin-top:0;max-width:8ch}
  .field-evidence__rail{top:9px;height:20px}
  .field-evidence__segment--gap{height:20px;grid-template-columns:1fr 20px 1fr}
  .field-evidence__segment--gap b{width:18px;height:18px;font-size:11px}
  .field-evidence__detail{grid-template-columns:1fr;gap:7px;min-height:350px;padding:12px 0 11px}
  .field-evidence__identity{display:grid;grid-template-columns:1fr auto;align-items:baseline;gap:2px 10px;padding-bottom:2px}
  .field-evidence__identity-status{grid-column:1/-1}
  .field-evidence__identity h4{font-size:17px;margin:2px 0 0}
  .field-evidence__fact{display:grid;grid-template-columns:56px minmax(0,1fr);gap:9px;padding-top:7px;border-top:1px solid var(--rule)}
  .field-evidence__fact b{font-size:11px;line-height:1.2}
  .field-evidence__fact span{font-size:11.5px;line-height:1.4}
  .field-evidence__fallback ol{grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
  .field-evidence__fallback li{font-size:11.5px;line-height:1.4;padding-top:7px}
}

/* three futures */
.futures{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.fbtn{text-align:left;background:var(--card);border:1px solid var(--rule);border-top:4px solid var(--accent);
  border-radius:5px;padding:16px 15px;cursor:pointer;transition:.2s;font-family:var(--sans);color:var(--ink)}
.fbtn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.fbtn.active{background:color-mix(in srgb,var(--accent) 8%,var(--card));box-shadow:var(--shadow)}
.fbtn .fname{font-size:11px;font-weight:700;letter-spacing:.13em;text-transform:uppercase;color:var(--accent)}
.fbtn .ftitle{font-size:19px;font-weight:700;margin:6px 0 4px;letter-spacing:-.01em}
.fbtn .fone{font-size:13px;line-height:1.45;color:var(--ink-2)}
.fdetail{margin-top:16px;background:var(--card);border:1px solid var(--rule);border-radius:5px;padding:18px 20px;
  border-left:5px solid var(--accent);min-height:150px;transition:opacity .22s ease}
.fdetail h3{font-family:var(--sans);font-size:17px;font-weight:700;margin:0 0 8px;color:var(--ink)}
.fdetail .flogic{font-family:var(--serif);font-size:16px;line-height:1.6;color:var(--ink);margin:0 0 14px}
.fdetail .fmeta{display:flex;flex-wrap:wrap;gap:18px}
.fmeta div{font-family:var(--sans)}
.fmeta .lab{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}
.fmeta .val{font-size:13.5px;color:var(--ink-2);margin-top:2px;max-width:16rem}
.fdetail.flash{animation:flash .5s ease}
@keyframes flash{0%{background:color-mix(in srgb,var(--accent) 22%,var(--card))}100%{}}

/* deskilling bars */
.desk{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media(max-width:640px){.desk{grid-template-columns:1fr}}
.desk__unit .dh{font-family:var(--sans);font-size:14px;font-weight:700;color:var(--ink);margin:0 0 2px}
.desk__unit .dsrc{font-family:var(--sans);font-size:11.5px;color:var(--ink-3);margin:0 0 14px}
.bar{display:flex;align-items:center;gap:10px;margin:9px 0}
.bar__lab{font-family:var(--sans);font-size:12px;color:var(--ink-2);width:104px;flex:none;text-align:right}
.bar__track{flex:1;background:var(--paper);border:1px solid var(--rule);border-radius:3px;height:26px;position:relative;overflow:hidden}
.bar__fill{display:block;height:100%;border-radius:2px 0 0 2px;transform-origin:left}
@keyframes barGrow{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.reveal.is-visible .bar__fill{animation:barGrow 1.05s cubic-bezier(.3,1,.4,1)}
.bar__val{font-family:var(--sans);font-size:12.5px;font-weight:700;width:44px;flex:none}
.bar--before .bar__fill{background:var(--ink-3)}
.bar--after .bar__fill{background:var(--red)}
.bar--before .bar__val{color:var(--ink-2)}
.bar--after .bar__val{color:var(--red)}
.desk__delta{font-family:var(--sans);font-size:12.5px;color:var(--ink-2);margin-top:8px;padding-top:8px;border-top:1px dashed var(--rule)}
.desk__delta b{color:var(--red)}

/* arms race + value: svg holders */
.svgbox{display:block;width:100%;overflow:visible}
.ordinal-chart{height:180px}
.cost-chart{height:330px}
.loop-chart{height:248px}
.arms-count{font-family:var(--sans);text-align:center;margin-top:12px}
.arms-count .n{font-size:30px;font-weight:800;color:var(--red);letter-spacing:-.02em}
.arms-count .l{font-size:12.5px;color:var(--ink-2);display:block;margin-top:-2px}
.arms-play{font-family:var(--sans);font-size:12px;font-weight:600;color:var(--ink-2);background:var(--card);
  border:1px solid var(--rule-2);border-radius:20px;padding:5px 14px;cursor:pointer;display:block;margin:14px auto 0;transition:.18s}
.arms-play:hover{border-color:var(--red);color:var(--red)}

/* value migration */
.val{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.val__col{flex:1;min-width:190px}
.vchip{background:var(--card);border:1px solid var(--rule);border-radius:5px;padding:12px 14px;margin-bottom:12px}
.vchip__name{font-family:var(--sans);font-size:13.5px;font-weight:700;color:var(--ink);display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.vchip__name span{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3)}
.vchip__bar{height:9px;border-radius:5px;margin-top:10px;background:var(--rule);overflow:hidden}
.vchip__bar i{display:block;height:100%;border-radius:5px;background:var(--ink-3);transition:width 1.2s cubic-bezier(.3,1,.4,1)}
.vchip--big{border-left:4px solid var(--learning)}
.vchip--big .vchip__name{font-size:15px}
.vchip--big .vchip__name span{color:var(--learning)}
.vchip--big .vchip__bar i{background:var(--learning)}
.vnote{font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--ink-3);text-align:center;margin-top:2px}
.val__arrow{font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--red);text-align:center;flex:0 0 auto;line-height:1.35;white-space:pre-line}
@media(max-width:640px){.val__arrow{transform:rotate(90deg);margin:4px 0}}

@media(max-width:720px){
  #fig-futures{padding:14px 12px 12px}
  #fig-futures figcaption{font-size:12px;line-height:1.4;margin-top:8px;padding-top:8px}
  .futures{gap:7px}
  .fbtn{min-width:0;min-height:68px;padding:8px 6px;border-top-width:3px;text-align:center}
  .fbtn:hover{transform:none;box-shadow:none}
  .fbtn .fname{font-size:11px;letter-spacing:.06em}
  .fbtn .ftitle{font-size:13px;line-height:1.2;margin:5px 0 0}
  .fbtn .fone{display:none}
  .fdetail{margin-top:8px;padding:10px 11px;min-height:0}
  .fdetail h3{font-size:15px;margin-bottom:5px}
  .fdetail .flogic{font-size:14px;line-height:1.35;margin-bottom:8px}
  .fdetail .fmeta{display:grid;grid-template-columns:1fr;gap:6px}
  .fmeta .val{font-size:11.5px;line-height:1.3;max-width:none}
}

/* footnotes */
.footnotes{max-width:var(--measure);margin:36px auto 0;padding:20px 22px 0;border-top:1px solid var(--rule)}
.footnotes h3{font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:.13em;text-transform:uppercase;color:var(--ink-3);margin:0 0 12px}
.footnotes ol{margin:0;padding-left:1.2em}
.footnotes li{font-family:var(--sans);font-size:13px;line-height:1.62;color:var(--ink-2);margin-bottom:12px;scroll-margin-top:64px}
.footnotes li b{color:var(--ink);font-weight:600}
.footnotes .back{color:var(--red);text-decoration:none;margin-left:5px;font-weight:700}
.footnotes a:not(.back){color:var(--red-ink)}
[id^="ref-"]{scroll-margin-top:64px}

/* ── sources ── */
.sources{border-top:1px solid var(--rule);margin-top:60px;padding:30px 0 70px;background:var(--paper-2)}
.evidence-brief{max-width:var(--measure);margin:0 auto}
.sources__toggle{font-family:var(--sans);font-size:13px;font-weight:600;letter-spacing:.04em;color:var(--ink-2);
  background:none;border:none;cursor:pointer;padding:6px 0;display:flex;align-items:center;gap:10px;list-style:none}
.sources__toggle::-webkit-details-marker{display:none}
.sources__toggle::marker{content:""}
.sources__title{font-family:var(--serif);font-size:22px;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
.sources__hint{font-size:11px;font-weight:500;letter-spacing:.02em;color:var(--ink-3)}
.sources__toggle .chev{color:var(--red);transition:transform .25s}
.evidence-brief[open] .sources__toggle .chev{transform:rotate(180deg)}
.sources__body{margin-top:16px}
.sources__lead{font-family:var(--sans);font-size:13.5px;color:var(--ink-2);font-style:italic;margin:0 0 12px}
.sources__body p{font-family:var(--sans);font-size:13px;line-height:1.68;color:var(--ink-2);margin:0 0 14px}
.sources__body b{color:var(--ink);font-weight:600}
.sources__note{font-size:12px !important;color:var(--ink-3) !important;border-top:1px solid var(--rule);padding-top:12px}
.sources .footnotes{max-width:none;margin:22px 0 26px;padding:20px 0 0}
.sources .footnotes li:target{background:color-mix(in srgb,var(--red) 7%,transparent);outline:6px solid color-mix(in srgb,var(--red) 7%,transparent)}
@media(max-width:600px){
  .sources__toggle{align-items:flex-start;flex-wrap:wrap}
  .sources__hint{flex-basis:calc(100% - 28px);order:3}
}

/* ── reveal-on-scroll ── */
.reveal{opacity:1;transform:none;transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.reveal--pending{opacity:0;transform:translateY(18px)}
.reveal.is-visible{opacity:1;transform:none}

/* strong, consistent keyboard focus */
.topbar__mark:focus-visible,.theme:focus-visible,.sources__toggle:focus-visible,.pcard:focus-visible,.fbtn:focus-visible,.field-evidence__step:focus-visible,.field-evidence__step--key-focus:focus,.blast-story__video:focus-visible,
.arms-play:focus-visible,.fn:focus-visible,.back:focus-visible,.svg-scroll:focus-visible{
  outline:3px solid var(--red);outline-offset:3px
}

/* Fixed-viewBox graphics stay legible on phones and can be panned horizontally. */
@media(max-width:600px){
  .svg-scroll{overflow-x:auto;overscroll-behavior-inline:contain;scrollbar-width:thin}
  .svg-scroll .svgbox{width:640px;max-width:none}
  .scroll-cue{display:block;font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.04em;color:var(--ink-3);text-align:right;margin:6px 0 0}
}
@media(prefers-reduced-motion:reduce){
  .reveal,.reveal.reveal--pending{opacity:1;transform:none;transition:none}
  .reveal.is-visible .bar__fill{animation:none}
  body,.topbar__mid,.theme,.sources__toggle .chev,.pcard,.pcard__detail,.fbtn,.fdetail,.field-evidence__step,.field-evidence__dot,.vchip__bar i{
    animation:none!important;transition:none!important
  }
  html{scroll-behavior:auto}
}