/* ============================================================
   AURIEL SYSTEMS — auriel.systems
   "The Engineering Dossier" — drafting-paper editorial system
   ============================================================ */

:root {
  --paper:     #F4F1E8;   /* drafting paper */
  --paper-2:   #EDE9DD;   /* recessed panel */
  --ink:       #16150F;   /* near-black ink */
  --ink-soft:  #33322A;
  --muted:     #736F62;   /* annotation grey */
  --line:      #D8D3C4;   /* drawn hairline */
  --line-2:    #C9C3B0;
  --blue:      #0A57D8;   /* signal blue */
  --blue-deep: #073b95;
  --red:       #A6321F;   /* rare oxblood accent (from logo) */
  --grid:      rgba(10, 87, 216, 0.055);

  --serif: 'Fraunces', 'Newsreader', Georgia, serif;
  --sans:  'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono:  'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --gutter: 104px;
  --nav-h:  108px;
  --ease:   cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--blue); color: var(--paper); }

img { display: block; }
a   { color: inherit; }

/* ---------- background layers: blueprint grid + grain --------- */
.bp-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(ellipse 120% 90% at 70% 0%, #000 30%, transparent 78%);
          mask-image: radial-gradient(ellipse 120% 90% at 70% 0%, #000 30%, transparent 78%);
}
.paper-grain {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.045;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='200' height='200' filter='url(%23n)'/></svg>");
}

/* ---------- viewfinder / registration HUD (JS-injected) ------- */
.hud { position: fixed; inset: 0; z-index: 60; pointer-events: none; }
.hud__corner {
  position: absolute;
  width: 26px; height: 26px;
  opacity: 0.5;
}
.hud__corner::before, .hud__corner::after {
  content: ""; position: absolute; background: var(--ink);
}
.hud__corner::before { width: 100%; height: 1px; top: 0; }
.hud__corner::after  { width: 1px; height: 100%; left: 0; }
.hud__corner--tl { top: 22px; left: 22px; }
.hud__corner--tr { top: 22px; right: 22px; transform: scaleX(-1); }
.hud__corner--bl { bottom: 22px; left: 22px; transform: scaleY(-1); }
.hud__corner--br { bottom: 22px; right: 22px; transform: scale(-1, -1); }
.hud__spine {
  position: absolute;
  right: 20px; top: 50%;
  transform: translateY(-50%) rotate(180deg);
  writing-mode: vertical-rl;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0.62;
}
@media (max-width: 900px) { .hud { display: none; } }

/* ---------- layout ---------- */
.wrap    { position: relative; z-index: 1; }
.section {
  position: relative;
  padding: 128px var(--gutter);
  border-bottom: 1px solid var(--line);
}
.section--bare { border-bottom: none; }
.section--alt  { background: var(--paper-2); }

/* section corner tick — a small drafting crosshair top-left */
.section::before {
  content: "";
  position: absolute;
  top: -1px; left: calc(var(--gutter) - 28px);
  width: 12px; height: 12px;
  border-top: 1px solid var(--line-2);
  border-left: 1px solid var(--line-2);
  opacity: 0.9;
}

.grid12 { display: grid; grid-template-columns: repeat(12, 1fr); gap: 26px; }

.col-1   { grid-column: 1 / span 1; }
.col-3   { grid-column: 1 / span 3; }
.col-4-8 { grid-column: 4 / span 8; }

/* ---------- figure / eyebrow labels ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before {
  content: "";
  width: 18px; height: 1px;
  background: var(--muted);
  flex: 0 0 auto;
}
.eyebrow--blue { color: var(--blue); }
.eyebrow--blue::before { background: var(--blue); width: 26px; }

/* ---------- typography ---------- */
h1, h2, h3 { font-family: var(--serif); font-weight: 400; margin: 0; }
.display, .h1, .h2, .h2-sm {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.015em;
  font-optical-sizing: auto;
}
.display {
  font-size: clamp(46px, 7vw, 112px);
  line-height: 0.98;
}
.display .em { font-style: italic; color: var(--blue); font-weight: 400; }
.h1  { font-size: clamp(42px, 5.8vw, 88px); line-height: 1.02; }
.h2  { font-size: clamp(29px, 3.1vw, 44px); line-height: 1.22; }
.h2-sm { font-size: clamp(26px, 2.7vw, 37px); line-height: 1.18; }

.lead {
  font-size: clamp(18px, 1.35vw, 20px);
  line-height: 1.62;
  color: var(--ink-soft);
  max-width: 560px;
}
.body { font-size: 17px; line-height: 1.78; color: var(--muted); max-width: 640px; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  height: var(--nav-h); padding: 0 var(--gutter);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px) saturate(1.1);
  -webkit-backdrop-filter: blur(8px) saturate(1.1);
}
.nav__logo { height: 74px; width: auto; object-fit: contain; }
.nav__links { display: flex; align-items: center; gap: 44px; }
.nav__link {
  position: relative;
  font-family: var(--mono);
  font-size: 11.5px; letter-spacing: 0.16em; text-transform: uppercase;
  text-decoration: none; color: var(--ink);
  padding-bottom: 5px;
}
.nav__link::after {
  content: "";
  position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px; background: var(--ink);
  transform: scaleX(0); transform-origin: right;
  transition: transform 0.4s var(--ease);
}
.nav__link:hover::after { transform: scaleX(1); transform-origin: left; }
.nav__link.is-active { color: var(--blue); }
.nav__link.is-active::after { background: var(--blue); transform: scaleX(1); }
.nav__toggle { display: none; }

/* ---------- inline underline links ---------- */
.link-underline {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 12.5px; letter-spacing: 0.06em; text-transform: uppercase;
  text-decoration: none; color: var(--ink);
  cursor: pointer;
}
.link-underline .lu-line {
  display: inline-block; width: 30px; height: 1px; background: var(--ink);
  transition: width 0.35s var(--ease);
}
.link-underline:hover .lu-line { width: 48px; }
.link-underline--sm { font-size: 11px; }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding-top: 168px; padding-bottom: 132px; }
.hero .eyebrow--blue { grid-column: 1 / -1; margin-bottom: 30px; }
.hero .display { grid-column: 1 / span 7; }
.hero .lead    { grid-column: 1 / span 5; margin-top: 42px; }
.hero__instrument {
  grid-column: 8 / span 5;
  grid-row: 2 / span 3;
  align-self: center;
  position: relative;
}
.hero__spec {
  grid-column: 1 / span 7;
  margin-top: 56px;
  display: flex; flex-wrap: wrap; gap: 40px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em;
  color: var(--muted);
}
.hero__spec b { color: var(--ink); font-weight: 500; display: block; font-size: 12px; margin-bottom: 4px; letter-spacing: 0.14em; }

/* instrument SVG animation */
.instrument { width: 100%; height: auto; overflow: visible; }
.instrument .blades { transform-origin: 200px 200px; animation: spin 46s linear infinite; }
.instrument .orbit-dot { transform-origin: 200px 200px; animation: spin 26s linear infinite; }
.instrument .draw {
  stroke-dasharray: var(--len, 1400);
  stroke-dashoffset: var(--len, 1400);
  animation: draw 1.8s var(--ease) forwards;
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes draw { to { stroke-dashoffset: 0; } }

/* ---------- product / preview cards ---------- */
.cards3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.card { display: flex; flex-direction: column; gap: 22px; }
.card h3 { font-size: 23px; margin-bottom: 9px; letter-spacing: -0.01em; }
.card p  { margin: 0; font-size: 15px; line-height: 1.62; color: var(--muted); }

/* blueprint placeholder plate */
.ph-img {
  position: relative; width: 100%; aspect-ratio: 4 / 3;
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    var(--paper-2);
  background-size: 20px 20px, 20px 20px, auto;
  border: 1px solid var(--line);
  overflow: hidden;
  transition: border-color 0.4s var(--ease);
}
.ph-img::after {
  content: ""; position: absolute; inset: 0;
  background: repeating-linear-gradient(135deg, transparent 0 9px, rgba(22,21,15,0.028) 9px 10px);
}
.card:hover .ph-img, .prod-row:hover .ph-img { border-color: var(--blue); }
.ph-img__label {
  position: absolute; left: 14px; bottom: 14px; z-index: 1;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.04em;
  color: var(--muted); background: var(--paper); padding: 4px 9px;
  border: 1px solid var(--line);
}
.ph-img__cross { position: absolute; top: 12px; right: 12px; opacity: 0.5; }

/* ---------- data rows (capabilities / journey) ---------- */
.row {
  position: relative;
  display: grid; grid-template-columns: repeat(12, 1fr); gap: 26px;
  padding: 34px 0; border-top: 1px solid var(--line);
  transition: background 0.4s var(--ease);
}
.row::before {
  content: ""; position: absolute; left: -20px; top: 34px;
  width: 0; height: 1px; background: var(--blue);
  transition: width 0.4s var(--ease);
}
.row:hover::before { width: 12px; }
.row__idx  { grid-column: 1 / span 1; font-family: var(--mono); font-size: 12px; color: var(--blue); }
.row__name { grid-column: 2 / span 3; font-family: var(--serif); font-size: 21px; letter-spacing: -0.01em; }
.row__desc { grid-column: 5 / span 7; font-size: 15px; line-height: 1.66; color: var(--muted); }
.row-end   { border-top: 1px solid var(--line); }

.jrow { padding: 30px 0; }
.jrow__dates { grid-column: 1 / span 3; font-family: var(--mono); font-size: 12.5px; color: var(--blue); }
.jrow__role  { grid-column: 4 / span 3; font-family: var(--serif); font-size: 18px; letter-spacing: -0.01em; }
.jrow__desc  { grid-column: 7 / span 6; font-size: 14.5px; line-height: 1.62; color: var(--muted); }

/* ---------- pull quote ---------- */
.quote {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  padding: 148px var(--gutter);
}
.quote__mark { font-family: var(--serif); font-size: 88px; line-height: 0.5; color: var(--blue); margin-bottom: 30px; height: 44px; }
.quote p {
  margin: 0; max-width: 860px;
  font-family: var(--serif); font-style: italic; font-weight: 400;
  font-size: clamp(27px, 3.1vw, 40px); line-height: 1.42; letter-spacing: -0.01em;
}
.quote__cite { margin-top: 36px; }

/* ---------- mini cards (ventures / education) ---------- */
.mini-card { position: relative; border-top: 1px solid var(--line); padding-top: 22px; transition: border-color 0.4s var(--ease); }
.mini-card--strong { border-top-color: var(--ink); }
.mini-card:hover { border-top-color: var(--blue); }
.mini-card h3 { font-size: 21px; margin-bottom: 7px; letter-spacing: -0.01em; }
.mini-card__role { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 15px; }
.mini-card p { margin: 0; font-size: 14.5px; line-height: 1.66; color: var(--muted); }
.mini-card__title { font-family: var(--serif); font-size: 19px; margin-bottom: 9px; letter-spacing: -0.01em; }
.mini-card__sub   { font-size: 13px; color: var(--muted); line-height: 1.62; }

/* ---------- pills ---------- */
.pill { font-family: var(--mono); font-size: 11.5px; border: 1px solid var(--line); padding: 6px 11px; transition: border-color 0.3s var(--ease), color 0.3s var(--ease); }
.pill:hover { border-color: var(--blue); color: var(--blue); }
.pill-row { display: flex; gap: 11px; flex-wrap: wrap; }

/* ---------- product rows (products page) ---------- */
.prod-row {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: 48px;
  align-items: center; padding: 60px 0; border-top: 1px solid var(--line);
}
.prod-row__num { font-family: var(--mono); font-size: 12px; color: var(--blue); margin-bottom: 18px; }
.prod-row h3 { font-size: 27px; margin-bottom: 16px; letter-spacing: -0.015em; }
.prod-row p  { margin: 0 0 22px; font-size: 16px; line-height: 1.68; color: var(--muted); }

/* ---------- upwork block ---------- */
.upwork { display: inline-flex; align-items: center; gap: 10px; margin-top: 26px; text-decoration: none; }
.upwork__tag { font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); border: 1px solid var(--line); padding: 6px 10px; }
.upwork__text { font-size: 14px; color: var(--ink); border-bottom: 1px solid var(--ink); padding-bottom: 1px; }
.upwork:hover .upwork__text { color: var(--blue); border-bottom-color: var(--blue); }

/* ---------- big stat ---------- */
.stat { font-family: var(--serif); font-size: clamp(48px, 6vw, 68px); font-weight: 400; color: var(--blue); line-height: 1; letter-spacing: -0.02em; }
.stat__label { margin-top: 14px; font-family: var(--mono); font-size: 11.5px; color: var(--muted); letter-spacing: 0.06em; text-transform: uppercase; max-width: 360px; line-height: 1.5; }

/* ---------- contact form ---------- */
.form { display: flex; flex-direction: column; gap: 34px; max-width: 480px; }
.field { display: flex; flex-direction: column; gap: 9px; }
.field span { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.field input, .field textarea {
  border: none; border-bottom: 1px solid var(--line); background: transparent;
  padding: 9px 0; font-size: 17px; font-family: var(--sans); color: var(--ink);
  outline: none; transition: border-color 0.3s var(--ease);
}
.field input:focus, .field textarea:focus { border-bottom-color: var(--blue); }
.field textarea { resize: none; }
.form__submit { align-self: flex-start; background: none; border: none; padding: 0; margin-top: 4px; }
.contact-info { display: flex; flex-direction: column; gap: 38px; }
.contact-detail__label { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 9px; }
.contact-detail__value { font-family: var(--serif); font-size: 20px; letter-spacing: -0.01em; text-decoration: none; transition: color 0.3s var(--ease); }
a.contact-detail__value:hover { color: var(--blue); }
.form-success { font-family: var(--serif); font-size: 25px; font-style: italic; margin: 0; }
.is-hidden { display: none !important; }

/* ---------- footer ---------- */
.footer {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: repeat(12, 1fr); gap: 26px;
  padding: 92px var(--gutter) 44px;
}
.footer__brand { grid-column: 1 / span 4; }
.footer__brand img { height: 50px; width: auto; margin-bottom: 18px; object-fit: contain; }
.footer__brand p { font-size: 13px; color: var(--muted); line-height: 1.6; max-width: 280px; margin: 0; }
.footer__col { display: flex; flex-direction: column; gap: 13px; }
.footer__col--company { grid-column: 6 / span 2; }
.footer__col--sisters { grid-column: 8 / span 5; gap: 16px; }
.footer__heading { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 9px; }
.footer__link { font-size: 14.5px; text-decoration: none; width: fit-content; }
.footer__link:hover { color: var(--blue); }
.footer__sister { display: flex; align-items: center; gap: 12px; height: 34px; text-decoration: none; }
.footer__sister img { height: 28px; width: auto; object-fit: contain; }
.footer__sister span, .footer__sister a { font-size: 13px; color: var(--ink); border-bottom: 1px solid var(--line); padding-bottom: 1px; text-decoration: none; }
.footer__sister:hover span, .footer__sister a:hover { border-bottom-color: var(--blue); color: var(--blue); }
.footer__legal {
  grid-column: 1 / -1; margin-top: 60px; padding-top: 26px;
  border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 7px;
  font-family: var(--mono); font-size: 11.5px; color: var(--muted); line-height: 1.7;
}
.footer__bar {
  grid-column: 1 / -1; display: flex; justify-content: space-between;
  margin-top: 26px; padding-top: 26px; border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; color: var(--muted);
}
.footer__bar a { text-decoration: none; }
.footer__bar a:hover { color: var(--blue); }

/* ---------- big closing CTA ---------- */
.cta-huge { font-size: clamp(34px, 4.4vw, 60px); letter-spacing: -0.02em; margin-bottom: 44px; line-height: 1.02; }

/* ============================================================
   Motion — load + scroll reveals
   ============================================================ */
@keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.animate-up { opacity: 0; animation: fadeUp 0.9s var(--ease) forwards; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  .animate-up, .reveal { opacity: 1 !important; transform: none !important; }
  .instrument .blades, .instrument .orbit-dot { animation: none !important; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1100px) {
  :root { --gutter: 60px; --nav-h: 92px; }
  .nav__logo { height: 60px; }
  .section { padding: 96px var(--gutter); }
  .hero { padding-top: 128px; padding-bottom: 96px; }
  .hero .display { grid-column: 1 / span 12; }
  .hero .lead { grid-column: 1 / span 8; }
  .hero__instrument { grid-column: 5 / span 8; grid-row: auto; margin-top: 60px; }
  .hero__spec { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  :root { --gutter: 22px; --nav-h: 72px; }
  .nav__logo { height: 46px; }
  .section { padding: 68px var(--gutter); }
  .section::before { display: none; }

  .grid12 { display: block; }
  .grid12 > * { grid-column: auto !important; }
  .grid12 > * + * { margin-top: 22px; }

  .hero { padding-top: 92px; padding-bottom: 68px; }
  .hero .lead { margin-top: 26px; max-width: none; }
  .hero__instrument { margin-top: 44px; max-width: 380px; }
  .hero__spec { gap: 26px 34px; margin-top: 40px; }

  .cards3 { grid-template-columns: 1fr; gap: 44px; }

  .row, .jrow, .prod-row { display: block; padding: 26px 0; gap: 0; }
  .row__idx, .row::before { display: none; }
  .row__name { font-size: 20px; margin-bottom: 9px; }
  .row__desc { margin-top: 7px; }
  .jrow__dates { margin-bottom: 7px; }
  .jrow__role { font-size: 19px; margin-bottom: 7px; }
  .prod-row .ph-img { margin-bottom: 26px; }
  .prod-row--rev { display: flex; flex-direction: column; }
  .prod-row--rev .ph-img { order: -1; }

  .quote { padding: 92px var(--gutter); }

  .footer { display: block; padding: 60px var(--gutter) 34px; }
  .footer > * + * { margin-top: 42px; }
  .footer__legal, .footer__bar { margin-top: 42px; }
  .footer__bar { flex-direction: column; gap: 12px; }

  /* mobile nav */
  .nav__toggle {
    display: inline-flex; flex-direction: column; justify-content: center; gap: 5px;
    width: 34px; height: 34px; background: none; border: none; cursor: pointer; padding: 0;
  }
  .nav__toggle span { display: block; width: 24px; height: 1.5px; background: var(--ink); transition: transform 0.3s var(--ease), opacity 0.3s var(--ease); }
  .nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  .nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
  .nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

  .nav__links {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: 8px var(--gutter) 26px;
    transform: translateY(-10px); opacity: 0; pointer-events: none;
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
  }
  .nav.is-open .nav__links { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav__link { width: 100%; padding: 18px 0; font-size: 13px; border-bottom: 1px solid var(--line); }
  .nav__link::after { display: none; }
  .nav__link:last-child { border-bottom: none; }

  .display { font-size: clamp(40px, 13vw, 66px); }
  .h1 { font-size: clamp(38px, 12vw, 62px); }
}