/* ============================================================
   NEURODEV LABS — styles.css
   Brand: cream + ink monochrome (from the ndevl. brand assets),
   with restrained status colours for LIVE / IN-DEV badges.
   All tokens live in :root — swap there to re-theme.
   ============================================================ */

:root {
  /* --- Brand palette (from ndevl. assets) --- */
  --bg-0: #f4f1e7;          /* cream canvas */
  --bg-1: #efebdd;          /* section cream, one shade deeper */
  --bg-2: #f9f7ef;          /* card surface, one shade lighter */
  --line: rgba(28, 27, 20, 0.14);
  --ink-0: #1c1b14;         /* brand ink */
  --ink-1: #4c4a3e;         /* secondary text */
  --ink-2: #8a8778;         /* muted text */
  --accent: #1c1b14;        /* the brand is monochrome — accent IS ink */
  --accent-soft: #5c5947;   /* warm graphite for gradients */
  --gold: #9c7a2e;          /* warm pulse — the "signal" colour */
  --live: #3e7247;          /* status: live */
  --dev: #9c6b1f;           /* status: in development */

  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;

  --max: 1180px;
  --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-0);
  color: var(--ink-0);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--ink-0); text-decoration: underline; text-decoration-color: rgba(28, 27, 20, 0.35); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--ink-0); }

::selection { background: var(--ink-0); color: var(--bg-0); }

/* ============ NAV ============ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem clamp(1.2rem, 4vw, 3rem);
  background: linear-gradient(rgba(244, 241, 231, 0.9), rgba(244, 241, 231, 0));
  transition: background 0.35s ease, border-color 0.35s ease;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(244, 241, 231, 0.92);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 1.35rem;
  color: var(--ink-0);
  text-decoration: none;
  text-transform: lowercase;
}
.nav__brand:hover { text-decoration: none; }
.nav__brand em { font-style: normal; }
.nav__mark { width: 46px; height: 28px; color: var(--ink-0); }

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(1.2rem, 3vw, 2.4rem);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nav__links a { color: var(--ink-1); font-weight: 500; text-decoration: none; }
.nav__links a:hover { color: var(--ink-0); }

.nav__cta {
  padding: 0.5rem 1.15rem;
  border: 1px solid var(--ink-0);
  border-radius: 999px;
  color: var(--ink-0) !important;
  transition: background 0.25s ease, color 0.25s ease;
}
.nav__cta:hover { background: var(--ink-0); color: var(--bg-0) !important; }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 6px;
}
.nav__burger span {
  width: 22px; height: 2px;
  background: var(--ink-0);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#lab-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.hero__scrim {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 78% 60% at 50% 44%, rgba(244, 241, 231, 0.86) 0%, rgba(244, 241, 231, 0.45) 62%, rgba(244, 241, 231, 0) 100%);
  pointer-events: none;
}

.hero__hud {
  position: absolute;
  top: 5.4rem;
  right: clamp(1.2rem, 4vw, 3rem);
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.95rem;
  background: rgba(249, 247, 239, 0.75);
  backdrop-filter: blur(8px);
}
.hud__dot {
  width: 7px; height: 7px;
  background: var(--gold);          /* square node, like the monogram circuits */
  animation: hudPulse 2.4s ease-in-out infinite;
}
@keyframes hudPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.72); }
}
#view-label { transition: opacity 0.4s ease; }
#view-label.is-switching { opacity: 0; }

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 1.4rem;
  max-width: 900px;
}

.hero__kicker {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.5em;
  color: var(--ink-1);
  margin-bottom: 1.4rem;
}

.hero__headline {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 6.4vw, 4.6rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: 1.4rem;
}
.grad {
  background: linear-gradient(92deg, var(--ink-0) 20%, var(--accent-soft) 85%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__sub {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: var(--ink-1);
  max-width: 620px;
  margin: 0 auto 2.4rem;
}

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  padding: 0.95rem 2.4rem;
  border-radius: 999px;
  text-decoration: none;
  transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease, color 0.22s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }

.btn--primary {
  background: var(--ink-0);
  color: var(--bg-0);
  box-shadow: 0 10px 28px rgba(28, 27, 20, 0.22);
}
.btn--primary:hover { box-shadow: 0 14px 36px rgba(28, 27, 20, 0.3); }

.btn--ghost {
  margin-top: 1.4rem;
  border: 1px solid var(--live);
  color: var(--live);
  padding: 0.7rem 1.6rem;
  font-size: 0.78rem;
}
.btn--ghost:hover { background: var(--live); color: var(--bg-0); }

.hero__scroll {
  position: absolute;
  bottom: 2.2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}
.hero__scroll-line {
  display: block;
  width: 1px;
  height: 52px;
  background: linear-gradient(var(--ink-0), transparent);
  animation: scrollHint 2.2s ease-in-out infinite;
}
@keyframes scrollHint {
  0% { transform: scaleY(0); transform-origin: top; }
  45% { transform: scaleY(1); transform-origin: top; }
  55% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ============ SECTIONS ============ */
.section { padding: clamp(5rem, 10vw, 8.5rem) clamp(1.2rem, 4vw, 3rem); }
.section__inner { max-width: var(--max); margin: 0 auto; }

.section__index {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.34em;
  color: var(--ink-2);
  margin-bottom: 1rem;
}

.section__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 4.4vw, 3.1rem);
  letter-spacing: -0.015em;
  margin-bottom: 1.2rem;
}

.section__lede {
  color: var(--ink-1);
  max-width: 560px;
  margin-bottom: 3.2rem;
}

/* ============ STORY ============ */
.story { background: linear-gradient(var(--bg-0), var(--bg-1)); }

.story__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
  margin-top: 1.6rem;
}

.story__copy p {
  color: var(--ink-1);
  font-size: 1.05rem;
  margin-bottom: 1.3rem;
}
.story__copy p:last-child { margin-bottom: 0; }

.story__stats {
  display: grid;
  gap: 1rem;
}
.stat {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem;
  background: var(--bg-2);
}
.stat__num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--ink-0);
  line-height: 1.1;
}
.stat__label {
  font-size: 0.85rem;
  color: var(--ink-2);
  letter-spacing: 0.04em;
}

/* ============ PRODUCT CARDS ============ */
.products { background: var(--bg-1); }
.engine { background: linear-gradient(var(--bg-1), var(--bg-0)); }

.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.6rem;
}
.cards--wide { grid-template-columns: 1fr; }

.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-2);
  padding: clamp(1.6rem, 3vw, 2.4rem);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--ink-0);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.card:hover {
  transform: translateY(-5px);
  border-color: rgba(28, 27, 20, 0.4);
  box-shadow: 0 24px 48px rgba(28, 27, 20, 0.12);
}
.card:hover::before { opacity: 1; }

.card--dark { background: var(--bg-0); }
.card--live { border-color: rgba(62, 114, 71, 0.45); }
.card--live::before { background: var(--live); }

.card__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  margin-bottom: 1.1rem;
}
.card__num {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--ink-2);
}
.card__head h3 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.card__alias { font-size: 0.95rem; color: var(--ink-2); font-weight: 400; }

.card__tag {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.28rem 0.75rem;
}
.card__tag--live {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--live);
  border-color: rgba(62, 114, 71, 0.5);
}
.card__tag--dev { color: var(--dev); border-color: rgba(156, 107, 31, 0.45); }

.pulse-dot {
  width: 6px; height: 6px;
  background: var(--live);          /* square, like the monogram nodes */
  animation: hudPulse 1.8s ease-in-out infinite;
}

.card__headline {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 500;
  color: var(--ink-0);
  margin-bottom: 0.85rem;
}

.card__pitch {
  color: var(--ink-1);
  font-size: 0.95rem;
  margin-bottom: 1.3rem;
}

.card__features {
  list-style: none;
  display: grid;
  gap: 0.75rem;
}
.card__features li {
  position: relative;
  padding-left: 1.35rem;
  font-size: 0.9rem;
  color: var(--ink-1);
}
.card__features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px; height: 7px;
  background: var(--ink-0);         /* square circuit-node bullet */
}
.card__features strong { color: var(--ink-0); font-weight: 600; }
.card__features code {
  font-size: 0.82em;
  color: var(--ink-0);
  background: rgba(28, 27, 20, 0.07);
  border-radius: 6px;
  padding: 0.08em 0.4em;
}

/* ============ CONTACT ============ */
.contact {
  background:
    radial-gradient(ellipse 70% 90% at 50% 115%, rgba(156, 122, 46, 0.12) 0%, transparent 65%),
    var(--bg-0);
}

.contact__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.6rem;
  margin-top: 2.4rem;
}

.contact__block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem;
  background: var(--bg-2);
}
.contact__label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-bottom: 0.75rem;
}
.contact__block p { font-size: 1.05rem; }
.contact__social { display: flex; gap: 0.8rem; flex-wrap: wrap; }
.contact__social span { color: var(--ink-2); }

/* ============ FOOTER ============ */
.footer {
  border-top: 1px solid var(--line);
  padding: 1.8rem clamp(1.2rem, 4vw, 3rem);
  background: var(--bg-0);
}
.footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
  font-size: 0.82rem;
  color: var(--ink-2);
}
.footer__tag { font-family: var(--font-display); letter-spacing: 0.08em; }

/* ============ LEGAL SUB-PAGES ============ */
.legal {
  max-width: 760px;
  margin: 0 auto;
  padding: 9rem clamp(1.2rem, 4vw, 2rem) 5rem;
}
.legal__kicker {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.34em;
  color: var(--ink-2);
  margin-bottom: 1rem;
}
.legal h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 4.6vw, 2.9rem);
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin-bottom: 0.9rem;
}
.legal__meta {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 0.95rem;
  margin-bottom: 2.4rem;
  background: var(--bg-2);
}
.legal__intro { color: var(--ink-1); font-size: 1.05rem; margin-bottom: 2.8rem; }
.legal h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.3rem;
  margin: 2.6rem 0 0.85rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}
.legal p { color: var(--ink-1); font-size: 0.97rem; margin-bottom: 1rem; }
.legal ul { list-style: none; display: grid; gap: 0.7rem; margin: 0.4rem 0 1.2rem; }
.legal ul li {
  position: relative;
  padding-left: 1.35rem;
  color: var(--ink-1);
  font-size: 0.95rem;
}
.legal ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px; height: 7px;
  background: var(--ink-0);
}
.legal ul li strong { color: var(--ink-0); }
.legal__callout {
  border: 1px solid var(--line);
  border-left: 3px solid var(--ink-0);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--bg-2);
  padding: 1.2rem 1.5rem;
  margin: 1.4rem 0;
}
.legal__callout p { margin: 0; }
.legal__back {
  display: inline-block;
  margin-top: 3rem;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--ink-0);
  border-radius: 999px;
  padding: 0.65rem 1.5rem;
  transition: background 0.25s ease, color 0.25s ease;
}
.legal__back:hover { background: var(--ink-0); color: var(--bg-0); text-decoration: none; }

.footer__privacy { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.footer__privacy a { color: var(--ink-2); }
.footer__privacy a:hover { color: var(--ink-0); }

/* ============ REVEAL ANIMATION ============ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s ease var(--d, 0s), transform 0.8s ease var(--d, 0s);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .story__grid { grid-template-columns: 1fr; }
  .story__stats { grid-template-columns: repeat(3, 1fr); }
  .contact__grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav__links {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    background: rgba(244, 241, 231, 0.97);
    backdrop-filter: blur(18px);
    font-size: 1.1rem;
    gap: 2.2rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }
  .nav__links.is-open { opacity: 1; pointer-events: auto; }
  .nav__burger { display: flex; z-index: 60; }
  .nav__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__burger.is-open span:nth-child(2) { opacity: 0; }
  .nav__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .story__stats { grid-template-columns: 1fr; }
  .hero__hud { top: 4.6rem; right: 1.2rem; font-size: 0.62rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__scroll-line, .hud__dot, .pulse-dot { animation: none; }
}