/* ================================================================
   AURVIONICS — design tokens + shared components
   Registers: instrument (dark) / ledger (paper)
   Type: B612 — the typeface designed for Airbus cockpit displays.
   ================================================================ */
:root{
  --ground:#0d1726;
  --panel:#152438;
  --panel-2:#1b2d45;
  --line:#26374e;
  --line-soft:#1d2c40;
  --teal:#7fd6cc;
  --teal-deep:#1e8d89;
  --teal-dim:#3b6f6c;
  --coral:#ff7656;
  --coral-dim:#8a4534;
  --bone:#e9eff3;
  --muted:#8da2b5;
  --faint:#5a6f83;

  --paper:#e8ebe7;
  --paper-2:#dfe4df;
  --ink:#14243a;
  --ink-soft:#43566c;
  --paper-line:#c3ccc4;

  --font:"B612",system-ui,sans-serif;
  --mono:"B612 Mono","SFMono-Regular",monospace;
  --w:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;color-scheme:dark}
body{
  background:var(--ground);
  color:var(--bone);
  font-family:var(--font);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
}
a,button{touch-action:manipulation}
section[id],div[id]{scroll-margin-top:84px}
.skip{
  position:absolute;left:16px;top:-60px;z-index:100;
  font-family:var(--mono);font-size:13px;letter-spacing:.1em;
  background:var(--teal);color:var(--ground);padding:10px 16px;
  text-decoration:none;transition:top .15s;
}
.skip:focus-visible{top:12px}
img,svg{display:block;max-width:100%}
a{color:inherit}
.wrap{max-width:var(--w);margin:0 auto;padding:0 32px}

/* ---------- shared furniture ---------- */
.mlabel{
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--faint);
}
.mlabel b{color:var(--teal);font-weight:400}
.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--teal);margin-bottom:20px;
}
.eyebrow .tick{color:var(--coral)}
h1,h2,h3{font-weight:700;letter-spacing:-.015em}
h1,h2{text-wrap:balance}

/* ---------- header ---------- */
header{
  border-bottom:1px solid var(--line-soft);
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb,var(--ground) 88%,transparent);
  backdrop-filter:blur(10px);
}
.bar{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand svg{width:26px;height:26px}
.brand span{
  font-family:var(--mono);font-weight:700;font-size:15px;
  letter-spacing:.32em;text-transform:uppercase;
}
nav{display:flex;gap:6px}
nav a{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;text-decoration:none;color:var(--muted);
  padding:8px 12px;border:1px solid transparent;
}
nav a:hover,nav a:focus-visible{color:var(--teal);border-color:var(--line)}
nav a[aria-current="page"]{color:var(--bone);border-color:var(--line)}
nav a.cta{color:var(--ground);background:var(--teal);border-color:var(--teal);font-weight:700;white-space:nowrap}
nav a.cta:hover{background:var(--bone);border-color:var(--bone);color:var(--ground)}
@media(max-width:820px){nav a:not(.cta){display:none}}
@media(max-width:480px){
  .brand span{letter-spacing:.18em;font-size:13px}
  nav a.cta{font-size:11px;padding:8px 12px;letter-spacing:.08em}
}

/* ---------- buttons ---------- */
.btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  font-family:var(--mono);font-size:13px;letter-spacing:.12em;text-transform:uppercase;
  text-decoration:none;padding:14px 22px;border:1px solid var(--teal);
  color:var(--ground);background:var(--teal);font-weight:700;
}
.btn:hover{background:var(--bone);border-color:var(--bone)}
.btn.ghost{background:transparent;color:var(--teal);font-weight:400}
.btn.ghost:hover{color:var(--bone);border-color:var(--bone);background:transparent}

/* ---------- sections ---------- */
section{padding:96px 0}
.sec-head{max-width:720px;margin-bottom:52px}
.sec-head h2{font-size:clamp(30px,3.6vw,44px);line-height:1.12;margin-bottom:18px}
.sec-head p{color:var(--muted)}
.sec-head p strong{color:var(--bone);font-weight:400}

/* ---------- page hero (interior pages) ---------- */
.page-hero{padding:76px 0 0}
.page-hero .kicker{
  font-family:var(--mono);font-size:12px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--teal);margin-bottom:18px;
}
.page-hero .kicker .tick{color:var(--coral)}
.page-hero h1{font-size:clamp(36px,4.6vw,58px);line-height:1.05;margin-bottom:20px;max-width:18ch}
.page-hero p{color:var(--muted);max-width:60ch;font-size:18px}
.page-hero p strong{color:var(--bone);font-weight:400}

/* ---------- home hero ---------- */
.hero{position:relative;overflow:hidden}
.hero .frame{
  position:relative;
  border-left:1px solid var(--line-soft);
  border-right:1px solid var(--line-soft);
  max-width:var(--w);margin:0 auto;padding:0 32px;
}
.hero-top{
  display:flex;justify-content:space-between;gap:16px;
  padding:18px 0;border-bottom:1px dashed var(--line-soft);
}
.hero-grid{
  position:relative;
  display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:48px;align-items:center;
  padding:76px 0 64px;
}
.hero h1{font-size:clamp(44px,6.2vw,76px);line-height:1.02;margin:0 0 26px}
.hero h1 .auth{color:var(--teal)}
.hero h1 .not{color:var(--coral)}
.hero .lede{color:var(--muted);max-width:54ch;font-size:18px;margin-bottom:36px}
.hero .lede strong{color:var(--bone);font-weight:400}

/* trajectory instrument */
.scope{border:1px solid var(--line);background:var(--panel);position:relative}
.scope .head{
  display:flex;justify-content:space-between;
  padding:12px 14px;border-bottom:1px solid var(--line-soft);
}
.scope .foot{
  display:flex;justify-content:space-between;gap:10px;
  padding:10px 14px;border-top:1px solid var(--line-soft);
}
.scope .view{
  background:
    repeating-linear-gradient(0deg,transparent 0 27px,var(--line-soft) 27px 28px),
    repeating-linear-gradient(90deg,transparent 0 27px,var(--line-soft) 27px 28px);
  background-color:var(--ground);
}
.scope svg{width:100%;height:auto}
@media(prefers-reduced-motion:no-preference){
  .flow{animation:flow 1.6s linear infinite}
  .ring-pulse{animation:pulse 3.4s ease-in-out infinite}
  @keyframes flow{to{stroke-dashoffset:-24}}
  @keyframes pulse{0%,100%{opacity:.4}50%{opacity:1}}
}

/* principle readouts */
.readouts{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line-soft);
}
.readouts > div{padding:18px 20px;border-right:1px solid var(--line-soft)}
.readouts > div:last-child{border-right:0}
.readouts .k{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--faint);text-transform:uppercase;margin-bottom:6px}
.readouts .v{font-family:var(--mono);font-size:13px;letter-spacing:.06em;color:var(--teal)}
@media(max-width:820px){
  .hero-grid{grid-template-columns:1fr;padding:56px 0 48px}
  .readouts{grid-template-columns:repeat(2,1fr)}
  .readouts > div:nth-child(2){border-right:0}
}

/* ---------- proof strip (home) ---------- */
.proof{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:var(--line-soft);border:1px solid var(--line-soft);
}
.proof a{
  display:block;background:var(--panel);padding:26px 24px;
  text-decoration:none;transition:background .2s;
}
.proof a:hover{background:var(--panel-2)}
.proof .num{
  font-family:var(--mono);font-weight:700;font-size:clamp(28px,2.8vw,38px);
  line-height:1;margin-bottom:10px;color:var(--bone);
}
.proof .num span{color:var(--teal)}
.proof .what{font-size:14.5px;color:var(--muted);line-height:1.55}
.proof .more{
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--teal);
  text-transform:uppercase;margin-top:14px;display:block;
}
@media(max-width:820px){.proof{grid-template-columns:1fr}}

/* ---------- pillars (home) ---------- */
.pillars{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:var(--line-soft);border:1px solid var(--line-soft);
}
.pillar{background:var(--panel);padding:32px 28px;text-decoration:none;transition:background .2s}
.pillar:hover{background:var(--panel-2)}
.pillar .id{
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;
  color:var(--teal);text-transform:uppercase;margin-bottom:16px;
}
.pillar h3{font-size:21px;margin-bottom:12px}
.pillar p{font-size:15px;color:var(--muted);line-height:1.6}
@media(max-width:820px){.pillars{grid-template-columns:1fr}}

/* ---------- annunciator ---------- */
.annunciator{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line-soft);border:1px solid var(--line-soft);
}
.ann{
  background:var(--panel);padding:22px 18px 18px;
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);position:relative;min-height:92px;
  display:flex;flex-direction:column;justify-content:flex-end;gap:8px;
  transition:background .25s,color .25s;
}
.ann i{font-style:normal;display:block;width:8px;height:8px;border-radius:50%;background:var(--faint);opacity:.5}
.ann:hover{background:#241d22;color:var(--coral)}
.ann:hover i{background:var(--coral);opacity:1;box-shadow:0 0 12px var(--coral)}
.ann.lit{color:var(--coral);background:#221b20}
.ann.lit i{background:var(--coral);opacity:1;box-shadow:0 0 12px var(--coral)}
@media(prefers-reduced-motion:no-preference){
  .ann.lit i{animation:blink 2.2s ease-in-out infinite}
  @keyframes blink{0%,100%{opacity:1}50%{opacity:.35}}
}
@media(max-width:820px){.annunciator{grid-template-columns:repeat(2,1fr)}}
.ann-note{margin-top:22px;font-family:var(--mono);font-size:12px;color:var(--faint);letter-spacing:.04em}

/* ---------- authority split ---------- */
.split{
  display:grid;grid-template-columns:1fr 1fr;gap:1px;
  background:var(--line-soft);border:1px solid var(--line-soft);
}
.plane{background:var(--panel);padding:36px}
.plane.auth{background:var(--panel-2)}
.plane h3{
  font-family:var(--mono);font-size:13px;letter-spacing:.2em;text-transform:uppercase;
  font-weight:700;margin-bottom:24px;
}
.plane.model h3{color:var(--muted)}
.plane.auth h3{color:var(--teal)}
.plane ul{list-style:none}
.plane li{padding:13px 0;border-top:1px dashed var(--line);display:flex;gap:14px;align-items:baseline}
.plane li::before{font-family:var(--mono);font-size:11px;flex:0 0 auto}
.plane.model li::before{content:"○";color:var(--faint)}
.plane.auth li::before{content:"●";color:var(--teal)}
.plane li em{font-style:normal;color:var(--faint);font-size:14px}
@media(max-width:820px){.split{grid-template-columns:1fr}}

/* ---------- authority actions ---------- */
.actions-row{display:flex;flex-wrap:wrap;gap:12px}
.act{
  font-family:var(--mono);font-size:14px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--teal);border:1px solid var(--teal-dim);background:var(--panel);
  padding:16px 26px;
}
.act.stop{color:var(--coral);border-color:var(--coral-dim);background:#221b20}

/* ---------- ledger register (paper) ---------- */
.register-paper{background:var(--paper);color:var(--ink);border-top:6px solid var(--teal-deep);color-scheme:light}
.register-paper .mlabel{color:#8a958c}
.register-paper .eyebrow{color:var(--teal-deep)}
.register-paper .sec-head p{color:var(--ink-soft)}
.register-paper .sec-head p strong{color:var(--ink);font-weight:700}
.register-paper .page-hero .kicker{color:var(--teal-deep)}
.register-paper .page-hero p{color:var(--ink-soft)}
.register-paper .page-hero p strong{color:var(--ink)}

.ledger{border:1px solid var(--paper-line);background:#f2f4f0}
.ledger-row{
  display:grid;grid-template-columns:150px 1fr 210px;gap:24px;
  padding:20px 24px;border-top:1px solid var(--paper-line);align-items:baseline;
}
.ledger-row:first-child{border-top:0}
.ledger-row.head{
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:#8a958c;background:var(--paper-2);padding-top:12px;padding-bottom:12px;
}
.chip{
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  padding:4px 10px;border:1px solid;display:inline-block;white-space:nowrap;
}
.chip.supported{color:#0b6b64;border-color:#0b6b64;background:#e0efec}
.chip.observed{color:#0b6b64;border-color:#7fb8b2;background:transparent}
.chip.vision{color:#5d6b7d;border-color:#9aa7b5;background:transparent}
.ledger-row .claim{font-size:16px;line-height:1.5}
.ledger-row .basis{font-family:var(--mono);font-size:12px;color:#8a958c;letter-spacing:.02em}
.ledger-foot{
  padding:18px 24px;border-top:1px solid var(--paper-line);
  font-family:var(--mono);font-size:12.5px;color:var(--ink-soft);letter-spacing:.02em;
}
@media(max-width:820px){
  .ledger-row{grid-template-columns:1fr;gap:8px}
  .ledger-row.head{display:none}
}

/* ---------- evidence ---------- */
.ev-feature{
  border:1px solid var(--paper-line);background:#f2f4f0;
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  margin-bottom:28px;
}
.ev-feature .stat{
  padding:44px 40px;border-right:1px solid var(--paper-line);
  display:flex;flex-direction:column;justify-content:center;
}
.ev-feature .k{
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:#8a958c;margin-bottom:18px;
}
.ev-feature .before{
  font-family:var(--mono);font-size:15px;color:var(--ink-soft);
  text-decoration:line-through;text-decoration-color:#b23a1e;margin-bottom:6px;
}
.ev-feature .after{
  font-family:var(--mono);font-weight:700;font-size:clamp(52px,5.4vw,76px);
  line-height:1;color:var(--teal-deep);
}
.ev-feature .body{padding:44px 40px;display:flex;flex-direction:column;justify-content:center}
.ev-feature .what{font-size:17px;color:var(--ink);line-height:1.6;margin-bottom:18px}
.ev-feature .limit{
  font-family:var(--mono);font-size:12px;color:#8a958c;line-height:1.55;
  border-top:1px dashed var(--paper-line);padding-top:14px;
}
@media(max-width:820px){
  .ev-feature{grid-template-columns:1fr}
  .ev-feature .stat{border-right:0;border-bottom:1px solid var(--paper-line)}
}
.evidence{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--paper-line);border:1px solid var(--paper-line)}
.ev{background:#f2f4f0;padding:30px 26px}
.ev .num{
  font-family:var(--mono);font-weight:700;font-size:clamp(34px,3.4vw,46px);
  color:var(--ink);line-height:1;margin-bottom:12px;
}
.ev .num span{color:var(--teal-deep)}
.ev .what{font-size:15px;color:var(--ink);margin-bottom:14px;line-height:1.5}
.ev .limit{
  font-family:var(--mono);font-size:12px;color:#8a958c;line-height:1.55;
  border-top:1px dashed var(--paper-line);padding-top:12px;
}
@media(max-width:820px){.evidence{grid-template-columns:1fr}}
.src-line{margin-top:22px;font-family:var(--mono);font-size:12px;color:#8a958c;letter-spacing:.04em}

/* ---------- memory strip ---------- */
.memory{background:var(--paper-2);border-top:1px solid var(--paper-line)}
.memory .inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:start}
.memory h2{font-size:clamp(28px,3vw,38px);line-height:1.14;color:var(--ink)}
.memory p{color:var(--ink-soft);margin-bottom:16px}
.memory p.rule{
  font-family:var(--mono);font-size:13.5px;color:var(--ink);
  border-left:3px solid var(--teal-deep);padding:10px 0 10px 18px;background:#eef1ec;
}
@media(max-width:820px){.memory .inner{grid-template-columns:1fr}}

/* ---------- wedge / cta ---------- */
.wedge{border-top:6px solid var(--coral)}
.wedge blockquote{
  font-size:clamp(26px,3.4vw,40px);font-weight:700;line-height:1.22;
  max-width:22ch;letter-spacing:-.01em;margin:28px 0 40px;
}
.wedge blockquote .v{color:var(--teal)}
.wedge blockquote .u{color:var(--muted)}
.wedge blockquote .r{color:var(--coral)}
.wedge .note{font-family:var(--mono);font-size:12.5px;color:var(--faint);margin-top:26px;letter-spacing:.04em}

/* ---------- contact / company ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line-soft);border:1px solid var(--line-soft)}
.contact-card{background:var(--panel);padding:36px}
.contact-card h2{
  font-family:var(--mono);font-size:13px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--teal);font-weight:700;margin-bottom:18px;
}
.contact-card p{color:var(--muted);font-size:15.5px;margin-bottom:14px}
.contact-card a.mail{
  font-family:var(--mono);font-size:17px;color:var(--bone);text-decoration:none;
  border-bottom:1px solid var(--teal);
}
.contact-card a.mail:hover{color:var(--teal)}
@media(max-width:820px){.contact-grid{grid-template-columns:1fr}}

/* ---------- contact form ---------- */
.cform{border:1px solid var(--line);background:var(--panel);padding:40px;max-width:720px;margin-bottom:56px}
.cform .row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.cform .field{margin-bottom:22px;display:flex;flex-direction:column;gap:8px}
.cform label{
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--muted);
}
.cform input,.cform select,.cform textarea{
  font-family:var(--font);font-size:16px;color:var(--bone);
  background:var(--ground);border:1px solid var(--line);
  padding:12px 14px;width:100%;
}
.cform textarea{min-height:140px;resize:vertical}
.cform input::placeholder,.cform textarea::placeholder{color:var(--faint)}
.cform input:focus-visible,.cform select:focus-visible,.cform textarea:focus-visible{
  outline:2px solid var(--teal);outline-offset:0;border-color:var(--teal);
}
.cform .hint{font-family:var(--mono);font-size:11.5px;color:var(--faint);letter-spacing:.03em;margin-top:14px}
@media(max-width:820px){.cform{padding:26px}.cform .row{grid-template-columns:1fr}}

/* ---------- prose (legal + text pages) ---------- */
.prose{max-width:760px;padding:64px 0 96px}
.prose h1{font-size:clamp(32px,4vw,44px);margin-bottom:10px}
.prose .updated{font-family:var(--mono);font-size:12px;color:var(--faint);letter-spacing:.1em;text-transform:uppercase;margin-bottom:40px}
.prose h2{font-size:22px;margin:40px 0 12px}
.prose p,.prose li{color:var(--muted);font-size:16px}
.prose ul{padding-left:22px;margin:12px 0}
.prose strong{color:var(--bone);font-weight:700}
.prose a{color:var(--teal)}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line-soft);padding:44px 0 56px}
.foot{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-start}
.foot .brand span{font-size:13px}
.foot nav{gap:2px;flex-wrap:wrap}
.legal{
  margin-top:34px;padding-top:22px;border-top:1px dashed var(--line-soft);
  font-family:var(--mono);font-size:11.5px;color:var(--faint);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;letter-spacing:.03em;
}
.legal a{color:var(--faint);text-decoration:none}
.legal a:hover{color:var(--teal)}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px}

/* ---------- mobile breathing room ---------- */
@media(max-width:820px){
  body{font-size:16px}
  section{padding:56px 0}
  .wrap{padding:0 20px}
  .hero .frame{padding:0 20px}
  .sec-head{margin-bottom:32px}
  .page-hero{padding:48px 0 0}
  .hero-grid{gap:32px}
  .readouts > div{padding:14px 16px}
  .plane{padding:24px 20px}
  .pillar{padding:24px 20px}
  .ann{min-height:72px;padding:16px 14px 14px}
  .ev{padding:24px 20px}
  .ev-feature .stat,.ev-feature .body{padding:28px 22px}
  .ledger-row{padding:16px 18px}
  .contact-card{padding:24px 20px}
  .act{padding:12px 18px;font-size:12px}
  .wedge blockquote{margin:20px 0 30px}
  footer{padding:32px 0 40px}
}