/* NebularHub marketing site v2 — © Laplace Software LLC
   Security-first relaunch per Marketing/NebularHub/DESIGN-GUIDELINE.md.
   Dark-first, RTL-safe (logical properties), no frameworks.
   Marketing tokens only — product-UI mocks carry their own faithful
   product tokens inline (single-accent azure, radius 10, exact alarm hexes). */

:root {
  --bg: #0b0f14;
  --surface: #121821;
  --surface-2: #161e2a;
  --line: #1f2937;
  --text: #e6edf6;
  --muted: #93a4bc;
  --azure: #4da3ff;
  --violet: #8b5cf6;
  --grad: linear-gradient(100deg, var(--azure), var(--violet));
  --radius: 14px;
  --maxw: 1120px;
  --font-display: 'Space Grotesk', 'IBM Plex Sans Arabic', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Inter', 'IBM Plex Sans Arabic', 'Segoe UI', system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  text-align: start;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin: 0 0 0.5em;
}

p { margin: 0 0 1em; }
a { color: var(--azure); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-inline-size: 100%; }

.wrap {
  max-inline-size: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.skip-link {
  position: absolute;
  inset-inline-start: 16px;
  inset-block-start: -48px;
  z-index: 100;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 14px;
  transition: inset-block-start 160ms ease-out;
}
.skip-link:focus { inset-block-start: 12px; text-decoration: none; }

/* ---------- nav ---------- */
.nav {
  position: sticky;
  inset-block-start: 0;
  z-index: 50;
  background: rgba(11, 15, 20, 0.72);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-block-end: 1px solid transparent;
  transition: border-color 160ms ease-out, background 160ms ease-out;
}
.nav.scrolled {
  border-block-end-color: var(--line);
  background: rgba(11, 15, 20, 0.88);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  min-block-size: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.12rem;
  letter-spacing: -0.01em;
}
.nav-logo:hover { text-decoration: none; }
.nav-inner nav { margin-inline-start: auto; }
.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
  margin-block: 0;
  padding: 0;
}
.nav-links a {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-cta { margin-inline-start: 8px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding-block: 11px;
  padding-inline: 22px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 160ms ease-out, box-shadow 160ms ease-out, border-color 160ms ease-out;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: var(--grad);
  color: var(--bg);
}
.btn-primary:hover { box-shadow: 0 6px 24px rgba(77, 163, 255, 0.3); }
.btn-ghost {
  color: var(--text);
  border-color: var(--line);
  background: rgba(18, 24, 33, 0.6);
}
.btn-ghost:hover { border-color: var(--muted); }
.btn-sm { padding-block: 8px; padding-inline: 16px; font-size: 0.88rem; }
/* keyboard focus — consistent with the bespoke component system */
.btn:focus-visible,
.nav-links a:focus-visible,
.nav-logo:focus-visible {
  outline: 2px solid var(--azure);
  outline-offset: 2px;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  border-block-end: 1px solid var(--line);
}
.hero-canvas {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  display: block;
}
.hero::after {
  /* readability scrim over the canvas */
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 110%, rgba(139, 92, 246, 0.10), transparent 55%),
              linear-gradient(180deg, rgba(11, 15, 20, 0.45), rgba(11, 15, 20, 0.1) 45%, rgba(11, 15, 20, 0.82));
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  padding-block: 108px 120px;
  max-inline-size: 780px;
}
.eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  max-inline-size: 62ch;
  margin-block-end: 22px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5.4vw, 3.7rem);
  margin-block-end: 18px;
}
.hero .sub {
  font-size: 1.12rem;
  color: var(--muted);
  max-inline-size: 58ch;
  margin-block-end: 30px;
}
.hero .sub strong { color: var(--text); }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; margin-block-end: 30px; }
.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  font-size: 0.9rem;
  color: var(--muted);
}
.hero-proof li { position: relative; padding-inline-start: 16px; }
.hero-proof li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0.38em;
  inline-size: 7px;
  block-size: 7px;
  border-radius: 999px;
  background: var(--grad);
}
.hero-proof b { color: var(--text); font-weight: 600; }
.hero-modules {
  font-size: 0.84rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  opacity: 0.85;
  margin-block-end: 0;
}

/* ---------- sections ---------- */
.section { padding-block: 88px; }
.section + .section { border-block-start: 1px solid var(--line); }
.section-head { max-inline-size: 660px; margin-block-end: 44px; }
.section-head h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); }
.kicker {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--azure);
  margin-block-end: 10px;
}
.section-head p { color: var(--muted); margin-block-end: 0; }

/* status flags */
.flag {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  padding-block: 3px;
  padding-inline: 11px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--surface-2);
}
.flag-live {
  color: var(--azure);
  border-color: rgba(77, 163, 255, 0.4);
  background: rgba(77, 163, 255, 0.08);
}
.flag-commit {
  color: var(--text);
  border-color: rgba(139, 92, 246, 0.4);
  background: rgba(139, 92, 246, 0.08);
}
.flag-roadmap { color: var(--muted); }

/* small print that travels with a claim */
.caveat {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  opacity: 0.9;
  margin-block: 6px 0;
}

/* dashed note box (NG1, compliance roadmap) */
.note {
  margin-block-start: 30px;
  padding: 18px 22px;
  border-radius: var(--radius);
  border: 1px dashed var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}
.note b { color: var(--text); }

/* inline artifact token (.nhlic / .nhpkg / .nhflo) */
.artifact {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: var(--azure);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding-block: 1px;
  padding-inline: 8px;
  vertical-align: middle;
}

/* ---------- sovereign ledger ---------- */
.ledger {
  list-style: none;
  margin: 0 0 36px;
  padding: 0;
  border-block-start: 1px solid var(--line);
}
.ledger-row {
  display: grid;
  grid-template-columns: minmax(200px, 300px) 1fr;
  gap: 12px 40px;
  padding-block: 22px;
  border-block-end: 1px solid var(--line);
}
.ledger-term h3 {
  font-size: 1.06rem;
  margin-block-end: 8px;
}
.ledger-term .flag { margin-block-start: 2px; }
.ledger-desc p { color: var(--muted); font-size: 0.95rem; margin-block-end: 0; }
.ledger-desc .caveat { margin-block-start: 8px; opacity: 0.75; }

/* Secure AI Gateway panel */
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}
.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-block-end: 14px;
}
.panel-head h3 { font-size: 1.15rem; margin: 0; margin-inline-end: 8px; }
.panel-lede {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  color: var(--text);
  max-inline-size: 64ch;
  margin-block-end: 22px;
}
.modes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-block-end: 16px;
}
.mode {
  border-block-start: 1px solid var(--line);
  padding-block-start: 14px;
}
.mode-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--azure);
  margin-block-end: 8px;
}
.mode p { color: var(--muted); font-size: 0.92rem; margin-block-end: 0; }
.panel > .caveat { margin-block-start: 4px; }

/* ---------- cross-domain ---------- */
.one-list {
  border-block-start: 1px solid var(--line);
  margin-block-end: 48px;
}
.one-row {
  display: grid;
  grid-template-columns: minmax(240px, 420px) 1fr;
  gap: 8px 40px;
  align-items: baseline;
  padding-block: 20px;
  border-block-end: 1px solid var(--line);
}
.one-row h3 {
  font-size: clamp(1.3rem, 2.6vw, 1.8rem);
  margin: 0;
}
.one-row p { color: var(--muted); font-size: 0.95rem; margin: 0; }

.fireblock {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 40px;
  align-items: center;
}
.fireblock-copy .flag { margin-block-end: 14px; }
.fireblock-copy h3 { font-size: 1.3rem; }
.fireblock-copy p { color: var(--muted); }
.fireblock-path {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
}
.path-node {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding-block: 12px;
  padding-inline: 18px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text);
  text-align: center;
}
.path-node + .path-node { margin-block-start: 26px; }
.path-node + .path-node::before {
  content: "";
  position: absolute;
  inset-block-start: -27px;
  inset-inline-start: 50%;
  inline-size: 1px;
  block-size: 26px;
  background: linear-gradient(180deg, var(--line), var(--azure));
}
.path-node-accent {
  border-color: rgba(77, 163, 255, 0.45);
  background: rgba(77, 163, 255, 0.08);
}

.roadmap { margin-block-start: 40px; }
.roadmap-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-block-end: 16px;
}
.roadmap-head h3 { font-size: 1.05rem; margin: 0; }
.roadmap-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 26px;
}
.rm-chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding-block: 5px;
  padding-inline: 14px;
}
.rm-chip:not(:last-child)::after {
  content: "\2192";
  position: absolute;
  inset-inline-start: 100%;
  inset-block-start: 50%;
  transform: translateY(-50%);
  margin-inline-start: 7px;
  color: var(--muted);
  opacity: 0.5;
}
[dir="rtl"] .rm-chip:not(:last-child)::after { content: "\2190"; }
.roadmap-foot {
  margin-block-start: 14px;
  font-size: 0.86rem;
  color: var(--muted);
  opacity: 0.85;
  margin-block-end: 0;
}

/* ---------- digital twin ---------- */
.split {
  display: grid;
  grid-template-columns: 5fr 6fr;
  gap: 48px;
  align-items: center;
}
.kpi-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.kpi-list li { position: relative; padding-inline-start: 20px; color: var(--muted); font-size: 0.95rem; }
.kpi-list li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0.42em;
  inline-size: 8px;
  block-size: 8px;
  border-radius: 999px;
  background: var(--grad);
}
.kpi-list b { color: var(--text); font-weight: 600; }
.mock {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}
.mock svg { display: block; inline-size: 100%; block-size: auto; border-radius: 10px; }

.steps-row { margin-block-start: 56px; }
.steps-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text);
  margin-block-end: 18px;
}
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.step .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  inline-size: 30px;
  block-size: 30px;
  border-radius: 999px;
  background: var(--grad);
  color: var(--bg);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  margin-block-end: 14px;
}
.step h3 { font-size: 1.02rem; margin-block-end: 6px; }
.step p { color: var(--muted); font-size: 0.9rem; margin-block-end: 0; }
.step::after {
  content: "\2192";
  position: absolute;
  inset-block-start: 26px;
  inset-inline-end: -15px;
  color: var(--muted);
  opacity: 0.6;
  font-size: 1.1rem;
}
[dir="rtl"] .step::after { content: "\2190"; }
.step:last-child::after { content: none; }

/* ---------- platform definition grid ---------- */
.def-grid { margin: 0; }
.def-row {
  display: grid;
  grid-template-columns: minmax(200px, 300px) 1fr;
  gap: 8px 40px;
  padding-block: 20px;
  border-block-start: 1px solid var(--line);
}
.def-row:last-child { border-block-end: 1px solid var(--line); }
.def-row dt {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--text);
}
.def-row dd { margin: 0; color: var(--muted); font-size: 0.95rem; }
.def-row .caveat { opacity: 0.75; }

/* ---------- white-label ---------- */
.tiers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-block-end: 28px;
}
.tier {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.tier h3 { font-size: 1.15rem; margin-block-end: 8px; }
.tier p { color: var(--muted); font-size: 0.94rem; margin-block-end: 0; }
.chip {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding-block: 4px;
  padding-inline: 12px;
  margin-block-end: 14px;
}
.mechanism {
  color: var(--muted);
  font-size: 0.95rem;
  max-inline-size: 72ch;
  margin-block-end: 28px;
}
.mechanism b { color: var(--text); }
.fixed-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 22px;
}
.fixed-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.86rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
}
.fixed-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.88rem;
  color: var(--muted);
}
.fixed-list li { display: flex; align-items: baseline; gap: 8px; }
.fixed-list li::before {
  content: "";
  flex: none;
  inline-size: 6px;
  block-size: 6px;
  border-radius: 1px;
  background: var(--muted);
  opacity: 0.6;
  transform: translateY(-1px) rotate(45deg);
}

/* ---------- region ---------- */
.region-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.region-item {
  border-block-start: 1px solid var(--line);
  padding-block-start: 18px;
}
.region-item h3 { font-size: 1.05rem; margin-block-end: 8px; }
.region-item p { color: var(--muted); font-size: 0.92rem; margin-block-end: 0; }
.bilingual {
  background: linear-gradient(100deg, rgba(77, 163, 255, 0.14), rgba(139, 92, 246, 0.14));
  border: 1px solid rgba(77, 163, 255, 0.35);
  border-radius: 999px;
  padding-block: 3px;
  padding-inline: 12px;
  font-size: 0.92rem;
}

/* ---------- CTA band ---------- */
.cta-band {
  text-align: center;
  padding-block: 80px;
  border-block-start: 1px solid var(--line);
  background:
    radial-gradient(ellipse at 50% 0%, rgba(77, 163, 255, 0.08), transparent 60%),
    var(--bg);
}
.cta-band h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
.cta-band p { color: var(--muted); max-inline-size: 52ch; margin-inline: auto; }
.cta-band .hero-ctas { justify-content: center; margin-block-start: 26px; margin-block-end: 0; }

/* ---------- footer ---------- */
.footer {
  border-block-start: 1px solid var(--line);
  padding-block: 44px;
  color: var(--muted);
  font-size: 0.88rem;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: flex-start;
  justify-content: space-between;
}
.footer .brand-col { max-inline-size: 380px; }
.footer-wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text);
  font-size: 1.05rem;
}
.footer-wordmark sup { font-size: 0.6em; color: var(--muted); }
.footer .legal { font-size: 0.8rem; opacity: 0.85; margin-block-end: 4px; }
.footer-contact { margin-block-end: 6px; }
.footer a { color: var(--muted); }
.footer a:hover { color: var(--text); }

/* ---------- scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 160ms ease-out, transform 160ms ease-out;
}
.no-js .reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .nav, .skip-link { transition: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 920px) {
  .tiers { grid-template-columns: 1fr; }
  .modes { grid-template-columns: 1fr; gap: 16px; }
  .region-grid { grid-template-columns: 1fr; gap: 24px; }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .steps { grid-template-columns: 1fr; }
  .step::after { content: none; }
  .fireblock { grid-template-columns: 1fr; gap: 28px; }
  .ledger-row, .one-row, .def-row { grid-template-columns: 1fr; gap: 6px; }
}
@media (max-width: 640px) {
  .nav-inner nav { display: none; }
  .hero-inner { padding-block: 80px 96px; }
  .section { padding-block: 64px; }
  .panel { padding: 22px; }
}