/* ============================================================
   NEURULUS — Full Rebuild
   Monochrome: black + warm white + greys. No color accents.
   Layout: Asymmetric splits, image-dominant sections
   ============================================================ */

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

:root {
  --bg:         #F5F3EE;
  --bg-alt:     #EDEAE4;
  --dark:       #0A0A0A;
  --dark-mid:   #1A1A1A;
  --text:       #0A0A0A;
  --text-mid:   #555;
  --text-muted: #999;
  --border:     #D5D3CE;
  --border-lt:  #E8E6E0;
  --white:      #F5F3EE;
  --sans:       'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:       'JetBrains Mono', 'SF Mono', 'Consolas', monospace;
  --max:        1320px;
}

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 48px;
}

@media (max-width: 768px) {
  .wrap { padding: 0 24px; }
}

/* --- Typography --- */
.t-display {
  font-family: var(--sans);
  font-size: clamp(42px, 6vw, 80px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.t-heading {
  font-family: var(--sans);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.t-subhead {
  font-family: var(--sans);
  font-size: 20px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-mid);
}

.t-body {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-mid);
}

/* #7 — Tabular numerals for aligned numbers in specs/stats */
.t-mono {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-feature-settings: "tnum";
}

.t-mono-lg {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1.5px solid var(--text);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s ease;
  width: auto;
  align-self: flex-start;
  white-space: nowrap;
}
.btn:hover {
  background: var(--text);
  color: var(--bg);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}
.btn--filled {
  background: var(--text);
  color: var(--bg);
}
.btn--filled:hover {
  background: var(--text-mid);
  border-color: var(--text-mid);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.btn--white {
  border-color: var(--text);
  color: var(--text);
}
.btn--white:hover {
  background: var(--text);
  color: var(--bg);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

/* ============================================================
   META BAR — above nav
   ============================================================ */
.meta-bar {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding: 6px 0;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.meta-bar .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.meta-bar__center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
@media (max-width: 768px) {
  .meta-bar { display: none; }
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  height: 64px;
}
.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
/* #1 — Logo with more presence */
.nav__logo {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: lowercase;
}
.nav__links {
  display: flex;
  gap: 36px;
  list-style: none;
}
.nav__links a {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color 0.2s ease;
}
.nav__links a:hover { color: var(--text); }
.nav__links a.active { color: var(--text); font-weight: 600; }
.nav__right {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 20px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all 0.2s;
}
.nav__right:hover { border-color: var(--text); color: var(--text); }

@media (max-width: 768px) {
  .nav__links { display: none; }
}

/* ============================================================
   HERO — Asymmetric split: text left, large visual right
   ============================================================ */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: calc(100vh - 64px);
  border-bottom: 1px solid var(--border);
}

.hero__text {
  padding: 80px 64px 80px 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero__eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* #2 — Square block instead of circle: more industrial */
.hero__eyebrow::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--text);
}

.hero__title {
  font-size: clamp(44px, 5.5vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
}

.hero__desc {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-mid);
  max-width: 480px;
  margin-bottom: 40px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: flex-start;
}

.hero__visual {
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  overflow: hidden;
  position: relative;
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero__text { padding: 64px 24px; }
  .hero__visual { min-height: 400px; }
}

/* ============================================================
   SPLIT SECTION — 50/50 or 60/40 image + text
   ============================================================ */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--border);
}
.split--reverse { direction: rtl; }
.split--reverse > * { direction: ltr; }
.split--wide-left { grid-template-columns: 3fr 2fr; }
.split--wide-right { grid-template-columns: 2fr 3fr; }

/* #6 — More right-padding on text side for breathing room */
.split__content {
  padding: 80px 80px 80px 64px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.split__visual {
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  min-height: 500px;
  overflow: hidden;
  position: relative;
}

.split__visual--dark {
  background: var(--bg-alt);
}

/* #9 — Left border accent on split labels */
.split__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
  padding-left: 12px;
  border-left: 2px solid var(--text);
}

.split__title {
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.split__desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-mid);
  margin-bottom: 32px;
  max-width: 480px;
}

@media (max-width: 900px) {
  .split, .split--wide-left, .split--wide-right {
    grid-template-columns: 1fr;
  }
  .split__content { padding: 48px 24px; }
  .split__visual { min-height: 360px; }
}

/* ============================================================
   FULL-WIDTH CALLOUT
   ============================================================ */
.callout {
  padding: 140px 0;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
/* #4 — Dark callout text slightly smaller to reduce visual weight */
.callout--dark {
  background: var(--bg-alt);
  color: var(--text);
  border-color: var(--border);
}
.callout--dark .callout__text {
  font-size: clamp(24px, 3.5vw, 48px);
}
.callout__text {
  font-size: clamp(28px, 4vw, 56px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 900px;
  margin: 0 auto 24px;
}
.callout__sub {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-mid);
  max-width: 600px;
  margin: 0 auto;
}
.callout--dark .callout__sub { color: var(--text-mid); }

/* ============================================================
   GRID CARDS — 3-column
   ============================================================ */
.cards {
  padding: 100px 0;
  border-bottom: 1px solid var(--border);
}
.cards__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 48px;
}
.cards__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.card {
  background: var(--bg);
  padding: 36px;
}
.card__num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-lt);
}
.card__title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.card__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-mid);
}

@media (max-width: 900px) {
  .cards__grid { grid-template-columns: 1fr; }
}

/* ============================================================
   PRODUCT CARDS — large visual + specs
   ============================================================ */
.products__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.product {
  background: var(--bg);
  display: flex;
  flex-direction: column;
}
.product__visual {
  background: var(--bg-alt);
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.product__body {
  padding: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.product__label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.product__name {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-lt);
}
.product__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-mid);
  margin-bottom: 24px;
}

/* Performance: defer rendering for below-fold sections */
.cards, .callout, .split:nth-child(n+3) {
  content-visibility: auto;
  contain-intrinsic-size: auto 600px;
}
.product__specs {
  list-style: none;
  border-top: 1px solid var(--border-lt);
  padding-top: 16px;
  margin-bottom: 24px;
  margin-top: auto;
}
.product__specs li {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 11px;
  padding: 5px 0;
  font-feature-settings: "tnum";
}
.product__specs li span:first-child {
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .products__grid { grid-template-columns: 1fr; }
}

/* ============================================================
   CERTIFICATION STRIP
   ============================================================ */
/* #8 — Row gap for wrapping on mid-width screens */
.certs {
  display: flex;
  justify-content: center;
  gap: 48px;
  row-gap: 12px;
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.cert {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-mid);
  font-weight: 600;
}

/* ============================================================
   ASCII ART (coexists with layout)
   ============================================================ */
.ascii {
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.3;
  white-space: pre;
  color: #666;
  user-select: none;
}
.ascii--white { color: #555; }

/* ============================================================
   TERMINAL MOCKUP
   ============================================================ */
.terminal {
  background: var(--bg);
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-mid);
  max-width: 100%;
  overflow: hidden;
}
.terminal__bar {
  background: var(--bg-alt);
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}
.terminal__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--border);
}
.terminal__body {
  padding: 20px;
  white-space: pre;
  overflow-x: auto;
}
.terminal__body .w { color: var(--text); }
.terminal__body .g { color: #4a7a3b; }
.terminal__body .d { color: var(--border); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: 0;
  border-top: 1px solid var(--border);
}
.footer__tagline {
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--text-mid);
  text-align: center;
}
.footer__main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 32px 0;
}
.footer__left {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
}
/* #5 — More gap between footer links */
.footer__links {
  display: flex;
  gap: 36px;
  list-style: none;
}
.footer__links a {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.footer__links a:hover { color: var(--text); }
.footer__bottom {
  padding: 16px 0;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--border);
}

@media (max-width: 768px) {
  .footer__main { flex-direction: column; gap: 16px; }
  .footer__bottom { flex-direction: column; gap: 4px; }
}

/* --- Split visual --- */

/* --- Callout version stamp --- */
.callout {
  position: relative;
}
.callout .version-stamp {
  position: absolute;
  top: 24px;
  right: 48px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--border);
}
@media (max-width: 768px) {
  .callout .version-stamp { display: none; }
}

/* --- Inline specs block for split text columns --- */
.inline-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--border-lt);
  margin-top: 24px;
  padding-top: 16px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.inline-specs dt {
  padding: 4px 0;
  color: var(--border);
}
.inline-specs dd {
  padding: 4px 0;
  color: var(--text-mid);
  text-align: right;
}

/* --- Full-width mono banner --- */
.mono-banner {
  padding: 14px 0;
  text-align: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* ============================================================
   CTA Section
   ============================================================ */
.cta-section {
  padding: 100px 0;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.cta-section__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  align-items: center;
  margin-top: 40px;
  flex-wrap: wrap;
}

/* ============================================================
   BACKGROUND TEXTURES — Engineering paper feel
   ============================================================ */

/* --- Dot grid: subtle background dots like graph paper --- */
.bg-dots {
  position: relative;
}
.bg-dots::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--border) 0.8px, transparent 0.8px);
  background-size: 24px 24px;
  opacity: 0.45;
  pointer-events: none;
  z-index: 0;
}
.bg-dots > * { position: relative; z-index: 1; }

/* --- Cross grid: + marks at intersections --- */
.bg-cross {
  position: relative;
}
.bg-cross::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border-lt) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-lt) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}
.bg-cross > * { position: relative; z-index: 1; }

/* --- Blueprint grid: finer grid for visual panels --- */
.bg-blueprint {
  background-image:
    linear-gradient(var(--border-lt) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-lt) 1px, transparent 1px);
  background-size: 20px 20px;
}

/* --- Ghost text: oversized mono text behind sections --- */
.ghost-text {
  position: relative;
  overflow: hidden;
}
.ghost-text::after {
  content: attr(data-ghost);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--mono);
  font-size: clamp(80px, 15vw, 200px);
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--text);
  opacity: 0.015;
  pointer-events: none;
  z-index: 0;
  user-select: none;
}
.ghost-text > * { position: relative; z-index: 1; }

/* --- Registration mark dividers --- */
.reg-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  padding: 12px 0;
  font-family: var(--mono);
  font-size: 9px;
  color: var(--border);
  user-select: none;
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.reg-divider::before,
.reg-divider::after {
  content: '+ \00a0\00a0\00a0 + \00a0\00a0\00a0 + \00a0\00a0\00a0 + \00a0\00a0\00a0 + \00a0\00a0\00a0 + \00a0\00a0\00a0 + \00a0\00a0\00a0 +';
  white-space: nowrap;
  flex-shrink: 0;
}

/* --- Top/bottom accent strips --- */
.strip-dots {
  height: 6px;
  background-image: radial-gradient(circle, var(--border) 1.5px, transparent 1.5px);
  background-size: 12px 6px;
  background-position: 0 0;
}

.strip-lines {
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--border) 0px,
    var(--border) 8px,
    transparent 8px,
    transparent 16px
  );
}

/* --- Scanline overlay for visual panels --- */
.scanlines {
  position: relative;
}
.scanlines::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 4px,
    rgba(0,0,0,0.012) 4px,
    rgba(0,0,0,0.012) 5px
  );
  pointer-events: none;
  z-index: 2;
}

/* --- Corner marks on cards/sections --- */
.corner-marks {
  position: relative;
}
.corner-marks::before {
  content: '+';
  position: absolute;
  top: 12px;
  left: 12px;
  font-family: var(--mono);
  font-size: 9px;
  color: var(--border);
  z-index: 2;
}
.corner-marks::after {
  content: '+';
  position: absolute;
  bottom: 12px;
  right: 12px;
  font-family: var(--mono);
  font-size: 9px;
  color: var(--border);
  z-index: 2;
}

/* --- Product visual with blueprint bg --- */
.product__visual.bg-blueprint {
  background-color: var(--bg-alt);
}

/* --- Apply scanlines to hero visual by default --- */
.hero__visual.scanlines::after {
  opacity: 0.5;
}

/* ============================================================
   SVG ANIMATIONS — Subtle, monochrome only
   ============================================================ */

/* Flowing dashed lines (data movement along connections) */
@keyframes flowDash {
  to { stroke-dashoffset: -20; }
}
.svg-flow {
  stroke-dasharray: 4 4;
  animation: flowDash 2s linear infinite;
}

/* Subtle node pulse (breathing) */
@keyframes breathe {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.9; }
}
.svg-breathe {
  animation: breathe 3s ease-in-out infinite;
}

/* ============================================================
   CARD HOVER — Subtle lift on card grid items
   ============================================================ */
.card {
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}

.product {
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.product:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.05);
}

/* ============================================================
   LINK UNDERLINE — subtle on hover
   ============================================================ */
.footer__links a {
  transition: color 0.2s ease;
  position: relative;
}
.footer__links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--text);
  transition: width 0.2s ease;
}
.footer__links a:hover::after {
  width: 100%;
}

/* #10 — Product visuals don't crush on mobile */
@media (max-width: 900px) {
  .product__visual {
    min-height: 220px;
    padding: 24px;
  }
}

/* #5 — How it works numbers smaller on mobile */
@media (max-width: 768px) {
  .ghost-text::after { font-size: 60px; }
  .reg-divider { display: none; }
  /* Override inline 48px number size on mobile */
  [style*="font-size:48px"] { font-size: 36px !important; }
}