:root {
  color-scheme: dark;
  --bg: #08111f;
  --bg-deep: #03070d;
  --panel: rgba(12, 24, 40, 0.88);
  --panel-strong: rgba(18, 33, 52, 0.94);
  --border: rgba(142, 166, 190, 0.22);
  --text: #eef4f8;
  --muted: #a8b3bf;
  --muted-2: #7f8d9b;
  --cyan: #6bb7d6;
  --cyan-strong: #4a9fbe;
  --gold: #c9a45c;
  --green: #8af5c2;
  --orange: #ffb076;
  --red: #ff8c8c;
  --shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
  --max: 1180px;
  --radius: 18px;
  --radius-sm: 12px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(circle at 12% 10%, rgba(107, 183, 214, 0.08), transparent 34rem),
    linear-gradient(180deg, var(--bg), var(--bg-deep) 58%, #02050a);
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(142,166,190,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(142,166,190,0.08) 1px, transparent 1px);
  background-position: 0 0, 0 0;
  background-size: 40px 40px, 40px 40px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.55), transparent 92%);
  opacity: 0.2;
  z-index: -2;
}

body::after {
  content: "";
  position: fixed;
  inset: auto -20% -40% -20%;
  height: 52rem;
  pointer-events: none;
  background: radial-gradient(ellipse at center, rgba(73, 125, 154, 0.08), transparent 72%);
  z-index: -1;
}

a {
  color: inherit;
  text-decoration: none;
}

img, svg {
  max-width: 100%;
  display: block;
}

p, h1, h2, h3 {
  margin-top: 0;
}

p:last-child { margin-bottom: 0; }

code {
  padding: 0.1rem 0.4rem;
  border: 1px solid var(--border);
  border-radius: 0.45rem;
  background: rgba(12, 24, 40, 0.9);
  color: var(--cyan);
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 999;
  transform: translateY(-150%);
  background: var(--cyan);
  color: #001525;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  font-weight: 800;
}

.skip-link:focus { transform: translateY(0); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(22px);
  background: rgba(3, 8, 18, 0.68);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background 180ms ease, border-color 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(3, 8, 18, 0.9);
  border-color: rgba(112,225,255,0.20);
}

.nav {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 78px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 850;
  letter-spacing: -0.03em;
}

.brand-mark {
  width: 40px;
  height: 40px;
}

.brand-text {
  font-size: 1.18rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-menu a {
  color: var(--muted);
  padding: 0.65rem 0.85rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.94rem;
  transition: color 160ms ease, background 160ms ease;
}

.nav-menu a:hover,
.nav-menu a:focus,
.nav-menu a[aria-current="page"] {
  color: var(--text);
  background: rgba(142,166,190,0.14);
}

.nav-menu .nav-cta {
  color: #06111f;
  background: linear-gradient(135deg, #74b7d2, #89c4dc);
  margin-left: 0.35rem;
  box-shadow: 0 10px 30px rgba(32, 200, 245, 0.22);
}

.nav-menu .nav-cta:hover,
.nav-menu .nav-cta:focus,
.nav-menu .nav-cta[aria-current="page"] {
  color: #06111f;
  background: linear-gradient(135deg, #89c4dc, #74b7d2);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  background: rgba(12, 24, 40, 0.9);
  border-radius: 14px;
  padding: 0;
  cursor: pointer;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
  margin: 4px auto;
}

.section-shell {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 5.25rem 0;
}

.section-shell.narrow {
  width: min(860px, calc(100% - 2rem));
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(340px, 0.96fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
  padding-top: 6.2rem;
  min-height: calc(100vh - 78px);
}

.eyebrow,
.section-kicker {
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.77rem;
  font-weight: 850;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.9rem, 6.2vw, 5rem);
  line-height: 0.92;
  letter-spacing: -0.08em;
  margin-bottom: 1.35rem;
}

h2 {
  font-size: clamp(1.9rem, 3.6vw, 3.2rem);
  line-height: 1;
  letter-spacing: -0.06em;
  margin-bottom: 1.15rem;
}

h3 {
  font-size: 1.12rem;
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin-bottom: 0.65rem;
}

.hero-lede,
.page-hero p,
.section-heading p,
.split-content p,
.cta-panel p {
  color: var(--muted);
  font-size: clamp(1.05rem, 1.55vw, 1.25rem);
}

.hero-lede {
  max-width: 700px;
  margin-bottom: 2rem;
}

.hero-actions,
.centered-action,
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.1rem;
  border-radius: 14px;
  font-weight: 780;
  border: 1px solid transparent;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover,
.button:focus {
  transform: translateY(-2px);
}

.button.primary {
  color: #06111f;
  background: linear-gradient(135deg, var(--cyan), #dcfbff);
  box-shadow: 0 8px 20px rgba(18, 61, 84, 0.32);
}

.button.secondary {
  color: var(--text);
  background: rgba(255,255,255,0.07);
  border-color: var(--border);
}

.button.secondary:hover,
.button.secondary:focus {
  background: rgba(255,255,255,0.11);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
  margin-top: 2.5rem;
}

.hero-metrics div {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(12, 24, 40, 0.82);
}

.hero-metrics strong {
  color: var(--gold);
  display: block;
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.25rem;
}

.hero-metrics span {
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-visual {
  position: relative;
  border: 1px solid rgba(112,225,255,0.22);
  border-radius: calc(var(--radius) + 4px);
  padding: clamp(1rem, 3vw, 2rem);
  background:
    linear-gradient(160deg, rgba(17, 32, 49, 0.92), rgba(8, 18, 30, 0.96)),
    radial-gradient(circle at 68% 34%, rgba(107,183,214,0.12), transparent 52%);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 1rem;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  pointer-events: none;
}

.hero-visual img {
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 12px 24px rgba(0,0,0,0.28));
}

.split-section {
  display: grid;
  grid-template-columns: minmax(180px, 0.38fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: start;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.split-section.reverse {
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.section-kicker {
  position: sticky;
  top: 105px;
}

.split-content {
  max-width: 820px;
}

.split-content p + p {
  margin-top: 1rem;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--cyan);
  font-weight: 850;
  margin-top: 1.1rem;
}

.cards-section,
.roadmap-preview,
.architecture-deep-dive,
.roadmap-page {
  border-top: 1px solid rgba(255,255,255,0.08);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 2rem;
}

.card-grid,
.feature-matrix,
.compatibility-grid,
.risk-grid,
.architecture-grid {
  display: grid;
  gap: 1rem;
}

.card-grid {
  grid-template-columns: repeat(4, 1fr);
}

.card,
.matrix-card,
.compatibility-card,
.risk-card,
.contact-card,
.contact-aside,
.architecture-step,
.timeline-item,
.roadmap-lane,
.layer-stack,
.cta-panel {
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(16, 31, 49, 0.92), rgba(10, 21, 35, 0.92));
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.2);
}

.card,
.matrix-card,
.risk-card,
.architecture-step {
  border-radius: var(--radius-sm);
  padding: 1.25rem;
}

.card p,
.matrix-card p,
.risk-card p,
.architecture-step p,
.compatibility-card p,
.timeline-item p,
.roadmap-lane p,
.contact-card p,
.contact-aside p,
.footer-grid p,
.fine-print {
  color: var(--muted);
}

.card-icon {
  width: 34px;
  height: 34px;
  display: inline-grid;
  place-items: center;
  border-radius: 12px;
  color: #06111f;
  background: linear-gradient(135deg, #6bb7d6, #c9a45c);
  font-weight: 900;
  margin-bottom: 1rem;
}

.fine-print {
  font-size: 0.92rem;
  margin-top: 1rem;
}

.architecture-band {
  width: min(1320px, calc(100% - 2rem));
  border-radius: calc(var(--radius) + 4px);
  padding: clamp(2.25rem, 5vw, 4rem);
  background:
    radial-gradient(circle at 12% 0%, rgba(107,183,214,0.10), transparent 26rem),
    linear-gradient(145deg, rgba(13, 26, 42, 0.96), rgba(9, 18, 30, 0.96));
  border: 1px solid rgba(112,225,255,0.18);
  margin-top: 3rem;
  margin-bottom: 3rem;
}

.architecture-grid {
  grid-template-columns: repeat(3, 1fr);
}

.architecture-step span {
  color: var(--gold);
  font-weight: 900;
  letter-spacing: 0.12em;
  font-size: 0.76rem;
  display: inline-block;
  margin-bottom: 0.75rem;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 23px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(107,183,214,0.45), transparent);
}

.timeline-item {
  position: relative;
  border-radius: var(--radius-sm);
  padding: 3rem 1.25rem 1.25rem;
}

.timeline-dot {
  position: absolute;
  top: 14px;
  left: 1.25rem;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(107,183,214,0.14);
}

.centered-action {
  justify-content: center;
  margin-top: 1.5rem;
}

.cta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 2rem;
  border-radius: calc(var(--radius) + 4px);
  padding: clamp(1.5rem, 4vw, 3rem);
  margin-bottom: 3rem;
  background:
    radial-gradient(circle at 84% 0%, rgba(201,164,92,0.10), transparent 24rem),
    linear-gradient(145deg, rgba(14, 28, 45, 0.95), rgba(9, 19, 31, 0.95));
}

.cta-panel h2 {
  max-width: 860px;
}

.page-hero {
  padding-top: 8rem;
  padding-bottom: 3rem;
  text-align: left;
}

.page-hero h1 {
  font-size: clamp(2.8rem, 6vw, 5.2rem);
}

.feature-matrix {
  grid-template-columns: repeat(3, 1fr);
}

.matrix-card {
  min-height: 210px;
}

.architecture-deep-dive {
  border-top: 1px solid rgba(255,255,255,0.08);
}

.layer-stack {
  border-radius: var(--radius);
  padding: 1rem;
}

.layer-stack div {
  display: grid;
  grid-template-columns: 260px minmax(0,1fr);
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.layer-stack div:last-child { border-bottom: 0; }
.layer-stack strong { color: var(--text); }
.layer-stack span { color: var(--muted); }

.compatibility-grid,
.risk-grid {
  grid-template-columns: repeat(3, 1fr);
}

.compatibility-card {
  border-radius: var(--radius);
  padding: 1.5rem;
}

.compatibility-card ul,
.check-list {
  padding: 0;
  margin: 1rem 0 0;
  list-style: none;
}

.compatibility-card li,
.check-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--muted);
  margin-bottom: 0.55rem;
}

.compatibility-card li::before,
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 999px;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(112,225,255,0.10);
}

.compatibility-card.compatible { border-color: rgba(138,245,194,0.32); }
.compatibility-card.compatible li::before { background: var(--green); box-shadow: 0 0 0 4px rgba(138,245,194,0.10); }
.compatibility-card.adaptable { border-color: rgba(255,209,102,0.32); }
.compatibility-card.adaptable li::before { background: var(--gold); box-shadow: 0 0 0 4px rgba(255,209,102,0.10); }
.compatibility-card.constrained { border-color: rgba(255,140,140,0.32); }
.compatibility-card.constrained li::before { background: var(--red); box-shadow: 0 0 0 4px rgba(255,140,140,0.10); }

.trace-grid .architecture-step { min-height: 180px; }

.roadmap-page {
  display: grid;
  gap: 1rem;
}

.roadmap-lane {
  display: grid;
  grid-template-columns: 96px minmax(0,1fr);
  gap: 1.25rem;
  border-radius: var(--radius);
  padding: 1.4rem;
}

.lane-number {
  width: 72px;
  height: 72px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: #06111f;
  background: linear-gradient(135deg, #6bb7d6, #c9a45c);
  font-weight: 950;
  font-size: 1.2rem;
}

.pill-row span {
  color: var(--muted);
  background: rgba(12, 24, 40, 0.9);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 999px;
  padding: 0.45rem 0.7rem;
  font-size: 0.88rem;
  font-weight: 700;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 1rem;
  align-items: start;
}

.contact-card,
.contact-aside {
  border-radius: var(--radius);
  padding: clamp(1.2rem, 3vw, 2rem);
}

.contact-form {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.contact-form label {
  display: grid;
  gap: 0.4rem;
  color: var(--muted);
  font-weight: 750;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.85rem 0.95rem;
  background: rgba(3, 8, 18, 0.62);
  color: var(--text);
  font: inherit;
  outline: none;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(112,225,255,0.12);
}

.contact-aside {
  display: grid;
  gap: 1rem;
  position: sticky;
  top: 100px;
}

.aside-block {
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 12px;
  padding: 1.2rem;
  background: rgba(13, 26, 42, 0.9);
}

.aside-block.emphasized {
  background: linear-gradient(145deg, rgba(30, 56, 78, 0.7), rgba(51, 42, 24, 0.42));
}

.large-link {
  color: var(--cyan);
  font-size: 1.2rem;
  font-weight: 850;
  word-break: break-word;
}

.not-found {
  min-height: 100vh;
  display: grid;
  place-content: center;
}

.site-footer {
  border-top: 1px solid rgba(255,255,255,0.08);
  background: rgba(3, 8, 18, 0.62);
}

.footer-grid,
.footer-bottom {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.5fr 0.7fr;
  gap: 2rem;
  padding: 3rem 0 2rem;
}

.footer-grid h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted-2);
  margin-bottom: 0.8rem;
}

.footer-grid a:not(.brand) {
  color: var(--muted);
  display: block;
  margin-bottom: 0.55rem;
}

.footer-grid a:hover,
.footer-grid a:focus {
  color: var(--text);
}

.footer-brand { margin-bottom: 1rem; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem 0 2rem;
  color: var(--muted-2);
  font-size: 0.88rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 1040px) {
  .hero,
  .split-section,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 4.5rem;
  }

  .section-kicker,
  .contact-aside {
    position: static;
  }

  .card-grid,
  .architecture-grid,
  .feature-matrix {
    grid-template-columns: repeat(2, 1fr);
  }

  .timeline,
  .compatibility-grid,
  .risk-grid {
    grid-template-columns: 1fr;
  }

  .timeline::before { display: none; }

  .cta-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  .nav-toggle { display: block; }

  .nav-menu {
    position: absolute;
    top: calc(100% + 1px);
    left: 1rem;
    right: 1rem;
    display: grid;
    gap: 0.2rem;
    padding: 0.6rem;
    background: rgba(3, 8, 18, 0.96);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow);
    transform-origin: top;
    transform: scaleY(0.92);
    opacity: 0;
    visibility: hidden;
    transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
  }

  .nav-menu.is-open {
    opacity: 1;
    visibility: visible;
    transform: scaleY(1);
  }

  .nav-menu a {
    border-radius: 14px;
    padding: 0.9rem 1rem;
  }

  .nav-menu .nav-cta { margin-left: 0; }

  .section-shell {
    width: min(100% - 1.25rem, var(--max));
    padding: 3.75rem 0;
  }

  .hero-metrics,
  .card-grid,
  .architecture-grid,
  .feature-matrix,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .page-hero {
    padding-top: 5rem;
  }

  .layer-stack div,
  .roadmap-lane {
    grid-template-columns: 1fr;
  }

  .cta-panel {
    padding: 1.3rem;
    border-radius: 16px;
  }
}

@media (max-width: 520px) {
  .brand-text { font-size: 1.05rem; }
  .brand-mark { width: 36px; height: 36px; }
  h1 { font-size: clamp(2.65rem, 16vw, 4rem); }
  .hero-actions .button,
  .cta-panel .button,
  .contact-form .button {
    width: 100%;
  }
}