/* ══════════════════════════════════════════════════════════════
   DATC — structure pass. No motion; see PLAN.md §10.
   Palette and type are locked (PLAN.md §6, §7).
   ══════════════════════════════════════════════════════════════ */

:root {
  --bg:        #0B0D10;
  --surface:   #1A1D21;
  --steel:     #E6E8EB;
  --steel-ink: #0B0D10;
  --steel-mut: #4A515A;

  --text:  #F5F5F0;
  --muted: #9BA2AB;
  --line:  rgba(245, 245, 240, 0.10);

  --identity:   #2D7BFF;
  --authorized: #22C55E;
  --denied:     #EF4444;

  --font: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;

  --sp-1: 8px;  --sp-2: 16px; --sp-3: 24px;
  --sp-4: 40px; --sp-5: 64px; --sp-6: 104px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-weight: 600; letter-spacing: -0.025em; line-height: 1.08; margin: 0; }
h1 { font-size: clamp(2.4rem, 6.2vw, 5rem); letter-spacing: -0.035em; line-height: 1.02; }
h2 { font-size: clamp(1.8rem, 3.6vw, 3.1rem); }
h3 { font-size: 1.25rem; letter-spacing: -0.01em; }
h4 { font-size: 1.0625rem; letter-spacing: -0.01em; }
p  { margin: 0; }
a  { color: inherit; }

:focus-visible { outline: 2px solid var(--identity); outline-offset: 3px; border-radius: 2px; }

.container { max-width: 780px; margin: 0 auto; padding: 0 var(--sp-3); }

.eyebrow, .section-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
}
/* Section number, set apart from the label it introduces. */
.section-label i {
  font-style: normal; color: var(--identity);
  margin-right: 14px; padding-right: 14px;
  border-right: 1px solid var(--line);
}
.section-steel .section-label i { border-right-color: rgba(11,13,16,0.16); }

/* ── Header: centred translucent bar ── */
.site-header {
  position: fixed; inset: 12px 0 auto 0; z-index: 50;
  display: flex; justify-content: center;
  padding: 0 16px;
  pointer-events: none;                 /* only the bar itself is clickable */
}
.navbar {
  pointer-events: auto;
  width: 100%; max-width: 820px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px;
  padding: 8px 8px 8px 22px;
  border-radius: 18px;
  background: rgba(18, 21, 26, 0.72);
  border: 1px solid rgba(245, 245, 240, 0.10);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.34);
}
@supports not (backdrop-filter: blur(1px)) {
  .navbar { background: rgba(18, 21, 26, 0.95); }
}

.wordmark {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-weight: 500;
  letter-spacing: 0.24em; font-size: 0.9375rem;
  text-decoration: none; color: var(--text); white-space: nowrap;
}
/* Sized to the cap height of the lettering beside it, not the line box, so the
   two sit on one optical line. */
.wordmark-mark { height: 0.78em; width: auto; display: block; }

.nav-links {
  display: flex; align-items: center; gap: 26px;
  list-style: none; margin: 0; padding: 0;
}
.nav-links a {
  position: relative;
  display: block; padding: 6px 0;
  font-size: 0.875rem; text-decoration: none; white-space: nowrap;
  color: var(--muted);
  transition: color 0.25s ease;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.is-current { color: var(--text); }
/* The active mark: a small accent dot under the current section. */
.nav-links a::after {
  content: ''; position: absolute; left: 50%; bottom: -3px;
  width: 4px; height: 4px; margin-left: -2px; border-radius: 50%;
  background: var(--identity);
  opacity: 0; transform: scale(0.4);
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.nav-links a.is-current::after { opacity: 1; transform: scale(1); }

.nav-actions { display: flex; align-items: center; gap: 8px; }
.nav-icon, .nav-go {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 12px;
  transition: background 0.25s ease, transform 0.15s ease;
}
.nav-icon svg, .nav-go svg {
  width: 19px; height: 19px; fill: none;
  stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round;
}
.nav-icon {
  background: rgba(245, 245, 240, 0.08);
  border: 1px solid rgba(245, 245, 240, 0.10);
}
.nav-icon svg { stroke: var(--text); }
.nav-icon:hover { background: rgba(245, 245, 240, 0.16); }

.nav-go { background: var(--identity); }
.nav-go svg { stroke: #05070A; }
.nav-go:hover { background: #4A8DFF; }
.nav-icon:active, .nav-go:active { transform: scale(0.94); }

/* ── 1. Hero — pinned 3D mode (JS only) ── */
.js .hero { height: 260vh; }
.js .hero-stage {
  position: sticky; top: 0; height: 100svh;
  overflow: hidden; display: flex; align-items: center;
}
.js .hero-canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  opacity: 0; transition: opacity 0.9s ease;
}
.js .hero-canvas.is-ready { opacity: 1; }
.js .hero-scrim { position: absolute; inset: 0; pointer-events: none; }
/* Two scrims crossfade as the text crosses the frame, so the copy always sits
   on the darkened side. */
.js .scrim-l {
  background:
    linear-gradient(to right, rgba(11,13,16,0.94) 0%, rgba(11,13,16,0.86) 34%, rgba(11,13,16,0.52) 58%, rgba(11,13,16,0) 84%),
    linear-gradient(to top, rgba(11,13,16,0.5) 0%, rgba(11,13,16,0) 28%);
}
.js .scrim-r {
  background:
    linear-gradient(to left, rgba(11,13,16,0.94) 0%, rgba(11,13,16,0.86) 34%, rgba(11,13,16,0.52) 58%, rgba(11,13,16,0) 84%),
    linear-gradient(to top, rgba(11,13,16,0.5) 0%, rgba(11,13,16,0) 28%);
  opacity: 0;
}
.js .hero-frames {
  position: relative; display: grid; width: 100%; padding: 0;
  transform: translateX(var(--tx, 0px));
}
.js .hero-frame { grid-area: 1 / 1; opacity: 0; will-change: opacity, transform; }
.js .hero-frame + .hero-frame { margin-top: 0; }

.hero-canvas, .hero-scrim, .hero-progress, .hero-skip { display: none; }
.js .hero-canvas, .js .hero-scrim, .js .hero-progress { display: block; }
.js .hero-skip { display: inline-flex; }

.hero-skip {
  position: absolute; top: 76px; left: 50%; z-index: 60;
  transform: translate(-50%, 0);
  opacity: 0; pointer-events: none;
  align-items: center; min-height: 44px; padding: 0 18px;
  font-family: var(--mono); font-size: 0.75rem;
  letter-spacing: 0.14em; text-transform: uppercase; text-decoration: none;
  border: 1px solid var(--line); border-radius: 999px;
  background: rgba(11,13,16,0.92); color: var(--text);
  transition: transform 0.3s ease;
}
.hero-skip:focus-visible { opacity: 1; pointer-events: auto; }

/* Identity tag: pinned to the aircraft's projected screen position in beat C.
   This is the resolution beat's payload — the page argues for verification, so
   what arrives is proof of identity, not a piece of hardware. */
.id-tag {
  position: absolute; top: 0; left: 0;
  display: none;
  align-items: center; gap: 10px;
  padding: 9px 14px 9px 12px;
  border-radius: 12px;
  background: rgba(11, 13, 16, 0.72);
  border: 1px solid rgba(45, 123, 255, 0.45);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0; pointer-events: none;
  will-change: transform, opacity;
}
.js .id-tag { display: inline-flex; }
.id-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--identity);
  box-shadow: 0 0 0 4px rgba(45, 123, 255, 0.18);
  flex: none;
}
.id-body { display: flex; flex-direction: column; line-height: 1.25; }
.id-code {
  font-family: var(--mono); font-size: 0.75rem;
  letter-spacing: 0.10em; color: var(--text);
}
.id-state {
  font-family: var(--mono); font-size: 0.625rem;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--authorized);
}

.hero-progress {
  position: absolute; left: 50%; bottom: 40px; transform: translateX(-50%);
  display: flex; gap: 6px;
}
/* Identity tag: pinned to the aircraft's projected screen position in beat C.
   This is the resolution beat's payload — the page argues for verification, so
   what arrives is proof of identity, not a piece of hardware. */
.hero-progress span { width: 26px; height: 2px; background: var(--line); transition: background 0.4s ease; }
.hero-progress span.on { background: var(--identity); }

@media (prefers-reduced-motion: reduce) {
  .js .hero { height: auto; }
  .js .hero-stage { position: static; height: auto; display: block; }
  .js .hero-canvas, .js .hero-scrim, .js .hero-progress, .js .id-tag { display: none; }
  .js .hero-frames { display: block; padding: 168px 0 var(--sp-6); }
  .js .hero-frame { opacity: 1; }
  .js .hero-frame + .hero-frame { margin-top: var(--sp-6); }
}

/* ── 1. Hero — stacked fallback ──
   Structure pass: three stacked readable frames. This doubles as the
   permanent no-WebGL / reduced-motion state, so it isn't throwaway. */
.hero-frames { padding: 168px 0 var(--sp-6); }
.hero-frame {
  max-width: 780px; margin: 0 auto; padding: 0 var(--sp-3);
}
.hero-frame + .hero-frame { margin-top: var(--sp-6); }
.hero-frame .eyebrow { display: block; margin-bottom: var(--sp-2); }

.hero-line {
  font-family: var(--font); font-weight: 600;
  font-size: clamp(1.9rem, 4.6vw, 3.6rem);
  letter-spacing: -0.03em; line-height: 1.08;
}
/* Lifted off the token: #EF4444 at 12px over imagery fails contrast. */
.eyebrow-denied { color: #FF7B7B; }
.hero-note { margin-top: var(--sp-3); color: var(--muted); font-size: 0.9375rem; max-width: 46ch; }
.hero-mech {
  margin-top: var(--sp-3);
  font-family: var(--mono); font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.18em; color: var(--muted);
}
.hero-mech i { color: var(--identity); font-style: normal; margin: 0 0.55em; }

/* ── Sections ── */
.section { padding: var(--sp-6) 0; border-top: 1px solid var(--line); }
.section .section-label { display: block; margin-bottom: var(--sp-3); }
.section h2 { margin-bottom: var(--sp-3); }

.prose { color: var(--muted); max-width: 62ch; }
.prose p + p { margin-top: var(--sp-2); }

.section-steel {
  background: var(--steel);
  color: var(--steel-ink);
  border-top: none;
  /* Faint graph paper: reads as a technical document rather than a slide. */
  background-image:
    linear-gradient(rgba(11, 13, 16, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 13, 16, 0.045) 1px, transparent 1px);
  background-size: 34px 34px;
}
.section-steel .section-label,
.section-steel .prose { color: var(--steel-mut); }

.section-highlight { background: var(--surface); }

/* ── 2. The gap ── */
.stat-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--sp-4); margin-bottom: var(--sp-3);
}
.stat-number {
  font-family: var(--mono); font-weight: 500;
  font-size: clamp(2.6rem, 6vw, 4rem);
  letter-spacing: -0.04em; line-height: 1;
  font-variant-numeric: tabular-nums;
}
/* Odometer reels. Each column is clipped to exactly one character height, so
   translateY in whole em units lands precisely on a numeral. */
.odo { display: inline-flex; align-items: flex-start; }
.odo-fixed { display: inline-block; line-height: 1; }
.odo-reel {
  display: inline-block;
  height: 1em; line-height: 1;
  overflow: hidden;
}
.odo-strip { display: block; will-change: transform; }
.odo-num {
  display: block;
  height: 1em; line-height: 1;
  font-variant-numeric: tabular-nums;
}

.stat-label { color: var(--muted); font-size: 0.9375rem; margin-top: var(--sp-1); max-width: 30ch; }
.stat-caption {
  font-size: 1.125rem;
  padding-bottom: var(--sp-5);
  margin-bottom: var(--sp-5);
  border-bottom: 1px solid var(--line);
}

/* ── 3. Precedent — pinned scroll sequence (pin 2 of 2) ── */
.precedent { border-top: none; }
.js .precedent { height: 205vh; }
.precedent-stage { padding: var(--sp-6) 0; }
.js .precedent-stage {
  position: sticky; top: 0;
  height: 100svh; padding: 0;
  display: flex; align-items: center;
  overflow: hidden;
}
.precedent .section-label { display: block; margin-bottom: var(--sp-3); }
.precedent h2 { margin-bottom: var(--sp-4); }

.pr-scene {
  margin: var(--sp-2) 0 var(--sp-4);
  padding: var(--sp-3) 0;
  border-top: 1px solid rgba(11, 13, 16, 0.10);
  border-bottom: 1px solid rgba(11, 13, 16, 0.10);
}
.pr-svg { width: 100%; height: auto; color: var(--steel-ink); display: block; }
.pr-mono {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.12em; fill: var(--steel-mut);
}
.pr-q {
  font-family: var(--mono); font-size: 26px;
  fill: var(--steel-mut); text-anchor: middle;
}

/* Scroll-driven pieces start hidden and are revealed by hero.js. */
.pr-radar, .pr-unknown, .pr-signal, .pr-readout, .pr-link { opacity: 0; }
.pr-blip, .pr-blip-ring { pointer-events: none; }

.pr-steps { position: relative; min-height: 5.4em; }
.pr-step {
  position: absolute; inset: 0;
  color: var(--steel-mut); max-width: 62ch;
  opacity: 0; transform: translateY(10px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}
.pr-step.on { opacity: 1; transform: none; }

.pr-chain {
  display: flex; flex-wrap: wrap; align-items: center;
  list-style: none; margin: var(--sp-4) 0 0; padding: 0;
}
.pr-chain li {
  position: relative;
  font-family: var(--mono); font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--steel-mut);
  padding: 8px 15px; border-radius: 8px;
  border: 1px solid rgba(11, 13, 16, 0.14);
  background: rgba(255, 255, 255, 0.5);
  opacity: 0; transform: translateY(8px);
  transition: opacity 0.45s ease, transform 0.45s ease,
              background 0.45s ease, color 0.45s ease, border-color 0.45s ease;
}
.pr-chain li.on { opacity: 1; transform: none; color: var(--steel-ink); }
/* Each link that has landed takes the accent; the last one closes the argument. */
.pr-chain li.on { border-color: rgba(45, 123, 255, 0.5); }
.pr-chain li:last-child.on {
  background: var(--identity); color: #fff; border-color: var(--identity);
}
.pr-chain li + li { margin-left: 34px; }
/* Arrows between the links, drawn rather than typed. */
/* Connector drawn as a rule with an arrowhead, rather than a typed glyph. */
.pr-chain li + li::before {
  content: ''; position: absolute; left: -30px; top: 50%;
  width: 26px; height: 1px; margin-top: -0.5px;
  background: rgba(11, 13, 16, 0.22);
}
.pr-chain li + li::after {
  content: ''; position: absolute; left: -9px; top: 50%;
  width: 5px; height: 5px; margin-top: -3px;
  border-top: 1px solid rgba(11, 13, 16, 0.3);
  border-right: 1px solid rgba(11, 13, 16, 0.3);
  transform: rotate(45deg);
}

@media (prefers-reduced-motion: reduce) {
  .js .precedent { height: auto; }
  .js .precedent-stage { position: static; height: auto; display: block; padding: var(--sp-6) 0; }
  .pr-steps { min-height: 0; }
  .pr-step { position: static; opacity: 1; transform: none; margin-bottom: var(--sp-2); }
  .pr-radar, .pr-unknown, .pr-signal, .pr-readout, .pr-link { opacity: 1; }
  .pr-chain li { opacity: 1; transform: none; color: var(--steel-ink); }
}

/* ── 4. What DATC is — orientation ──
   Three actors on one line, DATC in the middle. Built from type and rules
   rather than an illustration: the reader should grasp the shape of it in a
   glance, and the shape is "who talks to whom". */
.role-flow {
  display: grid; gap: var(--sp-3);
  list-style: none; margin: var(--sp-5) 0 0; padding: 0;
}
.role {
  position: relative;
  padding: var(--sp-3);
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(245, 245, 240, 0.02);
}
/* Revealed one at a time as the section rises; see hero.js. */
.js .role { opacity: 0; transform: translateY(16px); }
.js .role, .js .role + .role::before, .js .role + .role::after {
  transition: opacity 0.55s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}
.js .role.in { opacity: 1; transform: none; }
.js .role + .role::before, .js .role + .role::after { opacity: 0; }
.js .role.in + .role.in::before, .js .role.in + .role.in::after { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  .js .role { opacity: 1; transform: none; }
  .js .role + .role::before, .js .role + .role::after { opacity: 1; }
}
.role-tag {
  display: block; margin-bottom: 10px;
  font-family: var(--mono); font-size: 0.6875rem;
  text-transform: uppercase; letter-spacing: 0.16em;
  color: var(--muted);
}
.role p { color: var(--muted); font-size: 0.9375rem; }
/* DATC is the piece that does not exist yet, so it carries the accent. */
.role-mid {
  border-color: rgba(45, 123, 255, 0.45);
  background: rgba(45, 123, 255, 0.06);
}
.role-mid .role-tag { color: var(--identity); letter-spacing: 0.22em; }
.role-mid p { color: var(--text); }

.whatis-close {
  margin-top: var(--sp-4);
  font-size: 1.0625rem; color: var(--text);
}

@media (min-width: 860px) {
  .role-flow { grid-template-columns: repeat(3, 1fr); gap: 44px; }
  /* Connectors between the three, matching the precedent chain. */
  .role + .role::before {
    content: ''; position: absolute; left: -34px; top: 50%;
    width: 24px; height: 1px; background: var(--line);
  }
  .role + .role::after {
    content: ''; position: absolute; left: -15px; top: 50%;
    width: 5px; height: 5px; margin-top: -3px;
    border-top: 1px solid var(--muted); border-right: 1px solid var(--muted);
    transform: rotate(45deg);
  }
}

/* ── 4. Approach ── */
.mech-list { list-style: none; margin: var(--sp-5) 0 0; padding: 0; overflow: hidden; }
.mech-step {
  display: grid; grid-template-columns: 48px 1fr; gap: var(--sp-2);
  padding: var(--sp-3) 0; border-top: 1px solid var(--line);
}
.mech-index { font-family: var(--mono); font-size: 0.8125rem; color: var(--identity); letter-spacing: 0.1em; }
.mech-step p { color: var(--muted); font-size: 0.9375rem; margin-top: 6px; }

/* ── List reveals ──
   Rows alternate the side they arrive from. The offset is kept modest and the
   lists clip their own overflow, so nothing can push the page sideways. */
.js .mech-step,
.js .status-row {
  opacity: 0;
  transform: translateX(var(--from, 36px));
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.js .mech-step:nth-child(even),
.js .status-row:nth-child(even) { --from: -36px; }
.js .mech-step.in,
.js .status-row.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .js .mech-step,
  .js .status-row { opacity: 1; transform: none; transition: none; }
}

/* ── 5. Evidence: screenshots of what actually runs ── */
.evidence {
  display: grid; gap: var(--sp-3);
  margin: var(--sp-5) 0 var(--sp-5);
}
.shot { margin: 0; }
.shot img {
  display: block; width: 100%; height: auto;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--surface);
}
.shot figcaption {
  margin-top: 10px;
  font-size: 0.8125rem; line-height: 1.5; color: var(--muted);
}
@media (min-width: 860px) {
  .evidence { grid-template-columns: 1.35fr 1fr; gap: var(--sp-3); align-items: start; }
}

/* Limits: the parts that stay unsolved even if everything above works. */
.limits {
  margin-top: var(--sp-5); padding-top: var(--sp-4);
  border-top: 1px solid var(--line);
  max-width: 62ch;
}
.limits h3 { margin-bottom: var(--sp-2); }
.limits p { color: var(--muted); font-size: 0.9375rem; }
.limits p + p { margin-top: var(--sp-2); }
.limits strong { color: var(--text); font-weight: 600; }

/* ── 5. Status ── */
.status-list { overflow: hidden; }
.status-row {
  display: grid; grid-template-columns: 112px 1fr; gap: var(--sp-2);
  padding: var(--sp-3) 0; border-top: 1px solid var(--line); align-items: start;
}
.pill {
  font-family: var(--mono); font-size: 0.6875rem;
  text-transform: uppercase; letter-spacing: 0.12em;
  padding: 5px 10px; border-radius: 999px; justify-self: start;
  border: 1px solid currentColor; white-space: nowrap;
}
.pill-built   { color: var(--authorized); }
.pill-prelim  { color: #E0A32E; }
.pill-planned { color: var(--muted); }
.status-text p { color: var(--muted); font-size: 0.9375rem; margin-top: 6px; }

/* ── 6. The open problem ──
   The two failure modes sit side by side because the point is that neither is
   acceptable — seeing them as a pair is the argument. */
.fork {
  display: grid; gap: var(--sp-3);
  margin: var(--sp-4) 0;
}
.fork-arm {
  padding: var(--sp-3);
  border: 1px solid var(--line);
  border-left: 2px solid var(--denied);
  border-radius: 10px;
  background: rgba(239, 68, 68, 0.04);
}
.fork-tag {
  display: block; margin-bottom: 8px;
  font-family: var(--mono); font-size: 0.6875rem;
  text-transform: uppercase; letter-spacing: 0.16em;
  color: #FF7B7B;
}
.fork-arm p { color: var(--muted); font-size: 0.9375rem; }

.asking {
  margin-top: var(--sp-4); padding-top: var(--sp-4);
  border-top: 1px solid var(--line);
  max-width: 62ch;
}
.asking h3 { margin-bottom: var(--sp-2); }
.asking p { color: var(--muted); }

@media (min-width: 760px) {
  .fork { grid-template-columns: 1fr 1fr; gap: var(--sp-3); }
}

/* ── 7. Close ── */
.cta-button {
  display: inline-flex; align-items: center; min-height: 48px;
  margin-top: var(--sp-4); padding: 0 28px;
  border: 1px solid var(--identity); border-radius: 999px;
  color: var(--text); text-decoration: none; font-size: 0.9375rem;
  transition: background 0.25s ease, color 0.25s ease;
}
.cta-button:hover { background: var(--identity); color: #05070A; }

.contact-alt {
  margin-top: var(--sp-3);
  color: var(--muted); font-size: 0.9375rem;
}
.copy-mail {
  font: inherit; font-family: var(--mono); font-size: 0.875rem;
  color: var(--text); background: none; cursor: pointer;
  border: 0; border-bottom: 1px dashed rgba(245,245,240,0.35);
  padding: 2px 0; margin-left: 4px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.copy-mail:hover { color: var(--identity); border-bottom-color: var(--identity); }
.copy-mail.copied { color: var(--authorized); border-bottom-color: transparent; }

.site-footer {
  padding: var(--sp-4) var(--sp-3);
  border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: 0.75rem;
  letter-spacing: 0.14em; color: var(--muted);
}
.site-footer p { max-width: 780px; margin: 0 auto; }
.credit { margin-top: var(--sp-2); opacity: 0.6; line-height: 1.7; }
.credit a { color: inherit; }

@media (max-width: 768px) {
  :root { --sp-6: 72px; --sp-5: 48px; }
  .status-list { overflow: hidden; }
.status-row { grid-template-columns: 1fr; gap: var(--sp-1); }
  .hero-frames { padding: 132px 0 var(--sp-6); }

  .js .hero { height: 190vh; }

  /* The copy runs the full width here, so the side-to-side scrim does nothing.
     Darken top and bottom instead, where the text actually sits. */
  .js .scrim-l, .js .scrim-r {
    background:
      linear-gradient(to bottom,
        rgba(11,13,16,0.50) 0%,
        rgba(11,13,16,0.26) 20%,
        rgba(11,13,16,0.78) 40%,
        rgba(11,13,16,0.92) 62%,
        rgba(11,13,16,0.96) 100%);
  }
  .js .scrim-r { opacity: 0 !important; }

  /* Too little width for section links on a phone; the two actions remain. */
  .nav-links { display: none; }
  .navbar { padding: 7px 7px 7px 18px; border-radius: 15px; }
  .wordmark { font-size: 0.875rem; letter-spacing: 0.2em; gap: 8px; }
  .nav-icon, .nav-go { width: 38px; height: 38px; border-radius: 11px; }

  .hero-frame .eyebrow { font-size: 0.6875rem; letter-spacing: 0.12em; }
  .hero-line { font-size: clamp(1.7rem, 7.2vw, 2.4rem); }
  .hero-note { font-size: 0.875rem; }
  .hero-mech { font-size: 0.6875rem; letter-spacing: 0.12em; }
  .hero-mech i { margin: 0 0.35em; }
  /* Anchored under the copy rather than tracked to the aircraft. */
  .js .id-tag {
    top: auto; bottom: 14%; left: var(--sp-3); right: auto;
    transform: none !important;
    padding: 7px 11px 7px 9px; gap: 8px;
  }
  .id-code { font-size: 0.6875rem; }
  .id-state { font-size: 0.5625rem; }
}