/* =================================================================
   Boyd's Agent — "briefing room / oscilloscope" design system
   Display: Fraunces · Body: IBM Plex Sans · Mono: IBM Plex Mono
   ================================================================= */

:root {
  --ink:        #0e0d0b;
  --ink-1:      #15140f;
  --ink-2:      #1c1a14;
  --ink-3:      #232017;
  --paper:      #ece4d3;
  --paper-2:    #c9c0ad;
  --paper-dim:  #8f897a;
  --amber:      #f2b431;
  --amber-2:    #d9912a;
  --amber-soft: rgba(242, 180, 49, .12);
  --blue:       #79b2d4;
  --blue-soft:  rgba(121, 178, 212, .12);
  --red:        #e2795a;
  --red-soft:   rgba(226, 121, 90, .12);
  --line:       rgba(236, 228, 211, .12);
  --line-2:     rgba(236, 228, 211, .06);

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body:    "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --measure: 42rem;
  --wide: 78rem;
  --radius: 3px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 1.02rem;
  line-height: 1.65;
  font-feature-settings: "ss01", "cv05";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--amber); text-decoration: none; }
a:hover { color: var(--paper); }

/* ---------- atmosphere ---------- */
body::before {
  /* blueprint grid + radial phosphor glow, fixed */
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(120% 75% at 78% -8%, rgba(242, 180, 49, .10), transparent 55%),
    radial-gradient(90% 60% at 8% 102%, rgba(121, 178, 212, .06), transparent 60%),
    linear-gradient(var(--line-2) 1px, transparent 1px) 0 0 / 100% 64px,
    linear-gradient(90deg, var(--line-2) 1px, transparent 1px) 0 0 / 64px 100%,
    var(--ink);
  pointer-events: none;
}
.grain {
  position: fixed;
  inset: -50%;
  z-index: -1;
  pointer-events: none;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- layout helpers ---------- */
main { display: block; }
.wrap { width: min(100% - 2.5rem, var(--wide)); margin-inline: auto; }
.section { padding-block: clamp(3.5rem, 8vw, 7rem); }
.section--tight { padding-block: clamp(2.5rem, 5vw, 4rem); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--amber);
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  margin: 0 0 1.1rem;
}
.eyebrow::before {
  content: "";
  width: 1.6rem;
  height: 1px;
  background: var(--amber);
  opacity: .8;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -.012em;
  color: var(--paper);
  font-optical-sizing: auto;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .04em;
  padding: .8rem 1.3rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  color: var(--paper);
  background: transparent;
  transition: all .25s var(--ease);
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary {
  background: var(--amber);
  color: #1a1407;
  border-color: var(--amber);
  font-weight: 600;
}
.btn--primary:hover { background: var(--paper); border-color: var(--paper); color: #15140f; box-shadow: 0 10px 34px -12px rgba(242,180,49,.6); }
.btn--ghost:hover { border-color: var(--amber); color: var(--amber); }
.btn__arrow { transition: transform .25s var(--ease); }
.btn:hover .btn__arrow { transform: translateX(3px); }

/* =================================================================
   NAV
   ================================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: linear-gradient(var(--ink), rgba(14,13,11,.72));
  border-bottom: 1px solid var(--line-2);
}
.nav__inner {
  width: min(100% - 2.5rem, var(--wide));
  margin-inline: auto;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--paper); }
.nav__mark { color: var(--amber); display: grid; place-items: center; }
.nav__mark svg { animation: spin 36s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.nav__wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.12rem;
  letter-spacing: -.01em;
}
.nav__links { display: flex; align-items: center; gap: 1.6rem; }
.nav__links a {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .02em;
  color: var(--paper-2);
  position: relative;
  padding-block: .3rem;
}
.nav__links a:hover { color: var(--paper); }
.nav__links a[aria-current="page"] { color: var(--amber); }
.nav__links a[aria-current="page"]::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px; background: var(--amber);
}
.nav__ghlink { color: var(--amber) !important; }

/* =================================================================
   HERO
   ================================================================= */
.hero {
  position: relative;
  padding-top: clamp(2.5rem, 7vw, 5.5rem);
  padding-bottom: clamp(2rem, 5vw, 4rem);
}
.hero__grid {
  width: min(100% - 2.5rem, var(--wide));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}
.hero__kicker {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--paper-dim);
  margin-bottom: 1.4rem;
}
.hero__kicker b { color: var(--amber); font-weight: 500; }
.hero h1 {
  font-size: clamp(2.6rem, 6.4vw, 4.5rem);
  margin: 0 0 1.4rem;
}
.hero h1 .ital { font-style: italic; font-weight: 400; color: var(--amber); }
.hero__lede {
  font-size: clamp(1.05rem, 1.7vw, 1.22rem);
  color: var(--paper-2);
  max-width: 34rem;
  margin: 0 0 2rem;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: .8rem; align-items: center; }
.hero__meta {
  margin-top: 2.2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem 2.2rem;
  border-top: 1px solid var(--line-2);
  padding-top: 1.4rem;
}
.hero__stat { display: flex; flex-direction: column; gap: .15rem; }
.hero__stat b { font-family: var(--font-display); font-size: 1.5rem; color: var(--paper); font-weight: 600; }
.hero__stat span { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .14em; text-transform: uppercase; color: var(--paper-dim); }

/* ---------- OODA diagram ---------- */
.ooda { position: relative; }
.ooda__frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(28,26,20,.7), rgba(14,13,11,.5));
  padding: 1.1rem 1.1rem .8rem;
  position: relative;
  overflow: hidden;
}
.ooda__frame::before {
  content: "FIG. 1 — OODA, 1995 FORM";
  position: absolute; top: .8rem; left: 1.1rem;
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .18em;
  color: var(--paper-dim);
}
.ooda__frame::after {
  content: "IMPLICIT GUIDANCE & CONTROL";
  position: absolute; bottom: .7rem; right: 1.1rem;
  font-family: var(--font-mono); font-size: .58rem; letter-spacing: .16em;
  color: var(--amber); opacity: .7;
}
.ooda svg { width: 100%; height: auto; margin-top: 1.4rem; }

.ooda .node-box { fill: rgba(20,19,15,.9); stroke: var(--line); stroke-width: 1; }
.ooda .node-box.orient { stroke: var(--amber); fill: rgba(242,180,49,.05); }
.ooda .node-label { fill: var(--paper); font-family: var(--font-display); font-size: 15px; font-weight: 600; }
.ooda .node-sub { fill: var(--paper-dim); font-family: var(--font-mono); font-size: 7.2px; letter-spacing: .12em; }
.ooda .flow { fill: none; stroke: var(--paper-2); stroke-width: 1.4; opacity: .55; marker-end: url(#arrow); }
.ooda .flow.bypass { stroke: var(--amber); stroke-dasharray: 4 4; opacity: .9; marker-end: url(#arrow-amber); }
.ooda .flow.feedback { stroke: var(--blue); stroke-width: 1.2; opacity: .5; marker-end: url(#arrow-blue); }
.ooda .pulse { stroke-dasharray: 5 180; animation: dash 3.4s linear infinite; }
.ooda .pulse.b { animation-delay: -1.7s; }
@keyframes dash { to { stroke-dashoffset: -185; } }
.ooda .ping { transform-origin: center; }

/* =================================================================
   THESIS / "wrong loop" band
   ================================================================= */
.thesis { border-top: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); }
.thesis__grid {
  width: min(100% - 2.5rem, var(--wide));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: start;
}
.thesis blockquote {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.15rem);
  line-height: 1.22;
  font-weight: 400;
  letter-spacing: -.01em;
  color: var(--paper);
}
.thesis blockquote .hl { color: var(--amber); font-style: italic; }
.thesis cite {
  display: block;
  margin-top: 1.4rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--paper-dim);
  font-style: normal;
}
.thesis__body p { color: var(--paper-2); margin: 0 0 1.1rem; }
.thesis__body p:last-child { margin-bottom: 0; }
.thesis__body strong { color: var(--paper); font-weight: 600; }

/* =================================================================
   SECTION HEADINGS (home)
   ================================================================= */
.sechead { width: min(100% - 2.5rem, var(--wide)); margin: 0 auto clamp(2rem, 4vw, 3rem); }
.sechead h2 { font-size: clamp(1.9rem, 4vw, 3rem); margin: 0; max-width: 22ch; }
.sechead p { color: var(--paper-2); max-width: var(--measure); margin: 1rem 0 0; }

/* ---------- differentiators ---------- */
.cards { width: min(100% - 2.5rem, var(--wide)); margin-inline: auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }
.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--ink-1), rgba(14,13,11,.4));
  padding: 1.6rem 1.5rem 1.7rem;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.card:hover { border-color: var(--amber); transform: translateY(-4px); }
.card__no {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--amber);
  display: block;
  margin-bottom: 1.1rem;
}
.card h3 { font-size: 1.3rem; margin: 0 0 .6rem; }
.card p { color: var(--paper-2); font-size: .96rem; margin: 0; }
.card p code, .prose code, .card__tag { font-family: var(--font-mono); }
.card__tag { font-size: .78rem; color: var(--amber-2); }

/* =================================================================
   COMMAND SURFACE
   ================================================================= */
.cmds { width: min(100% - 2.5rem, var(--wide)); margin-inline: auto; }
.cmdgrid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.cmd {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.25rem 1.4rem;
  border-bottom: 1px solid var(--line-2);
  border-right: 1px solid var(--line-2);
  transition: background .25s var(--ease);
}
.cmd:hover { background: var(--amber-soft); }
.cmd__sig { font-family: var(--font-mono); font-size: .8rem; color: var(--amber); white-space: nowrap; padding-top: .12rem; }
.cmd__name { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; display: block; margin-bottom: .15rem; }
.cmd__desc { color: var(--paper-2); font-size: .9rem; }
.cmd--full { grid-column: 1 / -1; }

/* =================================================================
   BLUE / RED SPLIT
   ================================================================= */
.split { width: min(100% - 2.5rem, var(--wide)); margin-inline: auto; display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
.side {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem 1.7rem;
  position: relative;
  overflow: hidden;
}
.side::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 3px; }
.side--blue { background: linear-gradient(165deg, var(--blue-soft), transparent 60%); }
.side--blue::before { background: var(--blue); }
.side--red { background: linear-gradient(165deg, var(--red-soft), transparent 60%); }
.side--red::before { background: var(--red); }
.side__tag { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; }
.side--blue .side__tag { color: var(--blue); }
.side--red .side__tag { color: var(--red); }
.side h3 { font-size: 1.4rem; margin: .7rem 0 .6rem; }
.side p { color: var(--paper-2); margin: 0; font-size: .96rem; }
.split__rule { width: min(100% - 2.5rem, var(--wide)); margin: 1.4rem auto 0; font-family: var(--font-mono); font-size: .82rem; color: var(--paper-dim); text-align: center; }
.split__rule b { color: var(--amber); }

/* =================================================================
   AUDIENCE
   ================================================================= */
.aud { width: min(100% - 2.5rem, var(--wide)); margin-inline: auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.aud__item { border-top: 1px solid var(--line); padding-top: 1.1rem; }
.aud__item b { font-family: var(--font-display); font-size: 1.15rem; display: block; margin-bottom: .4rem; color: var(--paper); font-weight: 600; }
.aud__item span { color: var(--paper-2); font-size: .9rem; }

/* =================================================================
   CTA BAND
   ================================================================= */
.cta {
  width: min(100% - 2.5rem, var(--wide));
  margin-inline: auto;
  border: 1px solid var(--amber);
  border-radius: var(--radius);
  background:
    radial-gradient(90% 120% at 100% 0, rgba(242,180,49,.16), transparent 60%),
    linear-gradient(160deg, var(--ink-2), var(--ink-1));
  padding: clamp(2.2rem, 5vw, 3.6rem);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2rem;
  align-items: center;
}
.cta h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); margin: 0 0 .8rem; }
.cta p { color: var(--paper-2); margin: 0; }
.cta__actions { display: flex; flex-direction: column; gap: .8rem; }
.cta .codeline {
  font-family: var(--font-mono);
  font-size: .82rem;
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .85rem 1rem;
  color: var(--paper);
  display: flex; align-items: center; gap: .6rem;
}
.cta .codeline .prompt { color: var(--amber); }

/* =================================================================
   DOC / PROSE PAGES
   ================================================================= */
.doc { width: min(100% - 2.5rem, var(--wide)); margin-inline: auto; padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.doc__head { max-width: 50rem; margin-bottom: clamp(2.2rem, 5vw, 3.4rem); padding-bottom: 2rem; border-bottom: 1px solid var(--line); }
.doc__title { font-size: clamp(2.4rem, 6vw, 4rem); margin: 0; }
.doc__lede { font-size: clamp(1.1rem, 1.8vw, 1.32rem); color: var(--paper-2); max-width: 40rem; margin: 1.2rem 0 0; font-family: var(--font-display); font-weight: 400; line-height: 1.4; }

.prose { max-width: 50rem; }
.prose > * + * { margin-top: 1.15rem; }
.prose p { color: var(--paper-2); }
.prose h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  margin-top: 3rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line-2);
  position: relative;
}
.prose h2::before {
  content: "";
  position: absolute; top: -1px; left: 0; width: 2.2rem; height: 2px; background: var(--amber);
}
.prose h3 { font-size: 1.32rem; margin-top: 2.2rem; color: var(--paper); }
.prose h4 { font-size: 1.05rem; margin-top: 1.8rem; color: var(--amber-2); font-family: var(--font-mono); font-weight: 500; letter-spacing: .02em; }
.prose strong { color: var(--paper); font-weight: 600; }
.prose em { color: var(--paper); }
.prose a { border-bottom: 1px solid rgba(242,180,49,.4); transition: border-color .2s; }
.prose a:hover { border-color: var(--paper); }

.prose ul, .prose ol { padding-left: 1.3rem; color: var(--paper-2); }
.prose li { margin-top: .4rem; }
.prose li::marker { color: var(--amber); }
.prose ul li::marker { content: "▸ "; }

.prose blockquote {
  margin: 1.6rem 0;
  padding: .3rem 0 .3rem 1.5rem;
  border-left: 2px solid var(--amber);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--paper);
}
.prose blockquote p { color: var(--paper); }
.prose blockquote cite { display:block; margin-top:.6rem; font-family: var(--font-mono); font-style: normal; font-size: .74rem; letter-spacing: .1em; color: var(--paper-dim); }

.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.6rem 0; }

/* inline code */
.prose code {
  font-family: var(--font-mono);
  font-size: .86em;
  background: var(--ink-2);
  border: 1px solid var(--line-2);
  border-radius: 3px;
  padding: .12em .42em;
  color: var(--amber-2);
}

/* code blocks */
.prose pre, .filepane {
  background: #0a0a08;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: .82rem;
  line-height: 1.6;
  position: relative;
}
.prose pre { padding: 1.2rem 1.3rem; margin: 1.4rem 0; }
.prose pre code { background: none; border: 0; padding: 0; color: var(--paper-2); font-size: .82rem; }
.highlight { margin: 1.4rem 0; }
.highlight pre { margin: 0; }

/* file pane figure — a labelled artifact */
.filepane { margin: 1.6rem 0; }
.filepane__bar {
  display: flex; align-items: center; gap: .7rem;
  padding: .55rem .9rem;
  border-bottom: 1px solid var(--line);
  background: var(--ink-1);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--paper-dim);
}
.filepane__bar .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.filepane__bar .name { color: var(--paper-2); }
.filepane__bar .name b { color: var(--amber); font-weight: 500; }
.filepane pre { margin: 0; padding: 1.1rem 1.2rem; background: transparent; border: 0; }

/* file caption (kramdown {: .filecap} + fenced code) */
.prose .filecap {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--paper-dim);
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: var(--radius) var(--radius) 0 0;
  padding: .55rem .9rem;
  margin: 1.6rem 0 0;
  display: flex; align-items: center; gap: .55rem;
}
.prose .filecap::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--amber); opacity: .7; flex: none; }
.prose .filecap code { background: none; border: 0; padding: 0; color: var(--paper-2); font-size: .76rem; }
.prose .filecap strong { color: var(--amber); font-weight: 500; }
.prose .filecap + .highlight { margin-top: 0; }
.prose .filecap + .highlight pre,
.prose .filecap + pre { border-top-left-radius: 0; border-top-right-radius: 0; margin-top: 0; }

/* tables */
.prose table { width: 100%; border-collapse: collapse; margin: 1.6rem 0; font-size: .92rem; }
.prose th, .prose td { text-align: left; padding: .7rem .9rem; border-bottom: 1px solid var(--line-2); vertical-align: top; }
.prose thead th { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--amber); border-bottom: 1px solid var(--line); }
.prose tbody td { color: var(--paper-2); }
.prose tbody td:first-child { color: var(--paper); }
.prose td code { white-space: nowrap; }

/* callouts (markdown: wrap in blockquote-with-class via {: } not always available; use HTML) */
.note, .warn, .key {
  margin: 1.6rem 0;
  padding: 1.1rem 1.3rem 1.1rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  position: relative;
  font-size: .95rem;
}
.note { background: var(--blue-soft); border-color: rgba(121,178,212,.3); }
.warn { background: var(--red-soft); border-color: rgba(226,121,90,.3); }
.key  { background: var(--amber-soft); border-color: rgba(242,180,49,.35); }
.note p, .warn p, .key p { margin: 0; color: var(--paper); }
.note p + p, .warn p + p, .key p + p { margin-top: .7rem; }
.note__label, .warn__label, .key__label {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .18em; text-transform: uppercase;
  display: block; margin-bottom: .5rem;
}
.note__label { color: var(--blue); }
.warn__label { color: var(--red); }
.key__label { color: var(--amber); }

/* step markers (tutorial) */
.step {
  display: flex; align-items: baseline; gap: 1rem;
  margin: 3.2rem 0 .2rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--line);
}
.step__no {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .1em;
  color: #1a1407;
  background: var(--amber);
  border-radius: 2px;
  padding: .2rem .55rem;
  white-space: nowrap;
  font-weight: 600;
}
.step__title { font-family: var(--font-display); font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 600; margin: 0; color: var(--paper); }

/* "next" card */
.nextcard {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  max-width: 50rem;
  margin-top: 3.5rem;
  padding: 1.4rem 1.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--ink-1), transparent);
  color: var(--paper);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}
.nextcard:hover { border-color: var(--amber); transform: translateX(4px); color: var(--paper); }
.nextcard__label { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; color: var(--amber); }
.nextcard__title { font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; }
.nextcard__arrow { font-size: 1.4rem; color: var(--amber); }

/* tag pills */
.pills { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.2rem 0; list-style: none; padding: 0; }
.pills li { font-family: var(--font-mono); font-size: .74rem; color: var(--paper-2); border: 1px solid var(--line); border-radius: 20px; padding: .25rem .8rem; }

/* =================================================================
   FOOTER
   ================================================================= */
.foot { border-top: 1px solid var(--line); margin-top: 4rem; }
.foot__inner {
  width: min(100% - 2.5rem, var(--wide));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  padding-block: clamp(2.5rem, 5vw, 3.5rem);
}
.foot__sig { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .14em; color: var(--amber); margin-bottom: 1rem; }
.foot__desc { color: var(--paper-dim); font-size: .92rem; max-width: 34rem; margin: 0; }
.foot__col { display: flex; flex-direction: column; gap: .6rem; }
.foot__label { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; color: var(--paper-dim); margin-bottom: .3rem; }
.foot__col a { color: var(--paper-2); font-size: .92rem; }
.foot__col a:hover { color: var(--amber); }
.foot__base {
  width: min(100% - 2.5rem, var(--wide));
  margin-inline: auto;
  border-top: 1px solid var(--line-2);
  padding-block: 1.3rem;
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .04em; color: var(--paper-dim);
}
.foot__coords { color: var(--amber); opacity: .7; }

/* =================================================================
   REVEAL ANIMATION
   ================================================================= */
/* progressive enhancement: only hide when JS is present to animate it back in */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }

/* =================================================================
   RESPONSIVE
   ================================================================= */
@media (max-width: 920px) {
  .hero__grid { grid-template-columns: 1fr; }
  .ooda { order: -1; max-width: 32rem; }
  .thesis__grid { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .cmdgrid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .aud { grid-template-columns: 1fr 1fr; }
  .cta { grid-template-columns: 1fr; }
  .foot__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .nav__links { gap: 1rem; }
  .nav__links a:not(.nav__ghlink) { display: none; }
  .aud { grid-template-columns: 1fr; }
  .foot__inner { grid-template-columns: 1fr; }
  .hero__meta { gap: 1.1rem 1.6rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; }
}