:root {
  --bg-0: #05070d;
  --bg-1: #0a1322;
  --bg-2: #111d2f;
  --text: #e6edf8;
  --muted: #9fafc3;
  --line: rgba(95, 190, 255, 0.22);
  --glass: rgba(9, 17, 30, 0.58);
  --glass-border: rgba(102, 173, 230, 0.25);
  --mars: #ff7a38;
  --mars-soft: #ff9f63;
  --tech: #49dfff;
  --tech-soft: #8defff;
  --focus: #96f2ff;
  --shadow: 0 14px 42px rgba(7, 17, 34, 0.5);
  --radius: 16px;
  --max: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Segoe UI", "Noto Sans", "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(1100px 760px at 15% -10%, rgba(255, 122, 56, 0.12), transparent 56%),
    radial-gradient(900px 620px at 100% 0%, rgba(73, 223, 255, 0.1), transparent 55%),
    linear-gradient(160deg, var(--bg-0), var(--bg-1) 48%, var(--bg-2));
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.01), rgba(255, 255, 255, 0.01)),
    repeating-linear-gradient(90deg, transparent 0 58px, rgba(98, 156, 214, 0.07) 58px 59px),
    repeating-linear-gradient(180deg, transparent 0 58px, rgba(98, 156, 214, 0.06) 58px 59px);
  mask-image: radial-gradient(circle at 50% 22%, #000 16%, transparent 90%);
}

#bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  pointer-events: none;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  padding: 8px 12px;
  color: #fff;
  background: #081627;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  text-decoration: none;
  z-index: 300;
}

.skip-link:focus-visible {
  top: 12px;
}

a {
  color: inherit;
}

.glass {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(9px);
  -webkit-backdrop-filter: blur(9px);
  box-shadow: var(--shadow);
}

.site-header {
  position: sticky;
  top: 10px;
  z-index: 200;
  max-width: var(--max);
  margin: 10px auto 0;
  border-radius: 18px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
}

.logo-mark {
  width: 11px;
  height: 11px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, var(--tech-soft), var(--tech));
  box-shadow: 0 0 18px rgba(73, 223, 255, 0.8);
}

.logo-text {
  font-size: 1rem;
  letter-spacing: 0.14em;
  font-weight: 700;
}

.logo-sub {
  color: var(--muted);
  font-size: 0.78rem;
}

.menu-toggle {
  width: 44px;
  height: 40px;
  border-radius: 11px;
  border: 1px solid var(--glass-border);
  background: rgba(8, 15, 26, 0.85);
  display: grid;
  place-content: center;
  gap: 5px;
  cursor: pointer;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 8px;
  display: block;
  background: #d5e0ee;
  transition: transform 220ms ease, opacity 220ms ease;
}

.site-nav {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  display: grid;
  gap: 4px;
  padding: 8px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  background: rgba(7, 14, 26, 0.95);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 220ms ease, transform 220ms ease;
}

.site-nav a {
  padding: 10px 12px;
  border-radius: 9px;
  text-decoration: none;
  color: var(--muted);
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
  background: rgba(73, 223, 255, 0.12);
}

.site-header.nav-open .site-nav {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.site-header.nav-open .menu-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header.nav-open .menu-toggle span:nth-child(2) {
  opacity: 0;
}

.site-header.nav-open .menu-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 16px 64px;
}

.hero {
  position: relative;
  min-height: min(82vh, 760px);
  border-radius: 22px;
  margin-top: 14px;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid rgba(95, 162, 230, 0.3);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

.hero-video,
.hero-fallback,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-fallback {
  z-index: 0;
  background:
    radial-gradient(130% 100% at 78% 25%, rgba(255, 122, 56, 0.3), transparent 56%),
    radial-gradient(100% 80% at 18% 85%, rgba(73, 223, 255, 0.18), transparent 58%),
    linear-gradient(150deg, #060a13, #10182a 55%, #131b30);
  opacity: 0;
}

.hero.no-video .hero-fallback {
  opacity: 1;
}

.hero-overlay {
  z-index: 1;
  background:
    linear-gradient(105deg, rgba(5, 9, 17, 0.88) 20%, rgba(5, 9, 17, 0.46) 62%, rgba(5, 9, 17, 0.8) 100%),
    radial-gradient(80% 90% at 90% 20%, rgba(255, 122, 56, 0.14), transparent 65%);
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: clamp(100px, 15vw, 160px) clamp(20px, 6vw, 64px);
  max-width: 700px;
}

.hero-kicker {
  margin: 0 0 8px;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  text-transform: uppercase;
  color: var(--tech-soft);
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5.8vw, 4rem);
  line-height: 1.1;
  letter-spacing: 0.01em;
  text-wrap: balance;
}

.hero-subtitle {
  margin: 14px 0 0;
  max-width: 52ch;
  color: #ced8e8;
  font-size: clamp(1rem, 2.1vw, 1.2rem);
}

.hero-actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 12px;
  padding: 10px 16px;
  font-weight: 600;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease, background 220ms ease;
}

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

.btn-primary {
  background: linear-gradient(130deg, var(--mars), var(--mars-soft));
  color: #1c0c05;
  box-shadow: 0 8px 22px rgba(255, 122, 56, 0.35);
}

.btn-secondary {
  border-color: rgba(86, 194, 255, 0.5);
  color: var(--tech-soft);
  background: rgba(7, 19, 33, 0.65);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  box-shadow: 0 0 0 3px rgba(73, 223, 255, 0.16);
}

.section {
  padding: 58px 0 4px;
}

.section-heading {
  display: grid;
  gap: 4px;
  margin-bottom: 16px;
}

.eyebrow {
  margin: 0;
  color: var(--tech);
  letter-spacing: 0.11em;
  font-size: 0.75rem;
  text-transform: uppercase;
}

h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3.4vw, 2.2rem);
}

.card-grid {
  display: grid;
  gap: 14px;
}

.system-grid {
  grid-template-columns: 1fr;
}

.system-card {
  border-radius: var(--radius);
  padding: 18px;
  position: relative;
  overflow: hidden;
}

.system-card::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  top: 12px;
  height: 1px;
  background: linear-gradient(90deg, rgba(73, 223, 255, 0), rgba(73, 223, 255, 0.45), rgba(73, 223, 255, 0));
}

.system-card h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
}

.system-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.featured-panel {
  border-radius: 20px;
  padding: 16px;
  display: grid;
  gap: 16px;
}

.diagram {
  min-height: 180px;
  border-radius: 14px;
  position: relative;
  border: 1px solid rgba(104, 178, 240, 0.3);
  background:
    linear-gradient(130deg, rgba(255, 122, 56, 0.08), transparent 35%),
    linear-gradient(320deg, rgba(73, 223, 255, 0.1), transparent 45%),
    rgba(7, 14, 25, 0.8);
  overflow: hidden;
}

.diag-node {
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, var(--tech-soft), var(--tech));
  box-shadow: 0 0 20px rgba(73, 223, 255, 0.65);
}

.n1 { top: 18%; left: 12%; }
.n2 { top: 66%; left: 28%; }
.n3 { top: 34%; right: 20%; }
.n4 { bottom: 18%; right: 10%; }

.diag-line {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, rgba(73, 223, 255, 0.2), rgba(73, 223, 255, 0.82), rgba(255, 122, 56, 0.55));
  transform-origin: left center;
}

.l1 {
  left: 15%;
  top: 24%;
  width: 44%;
  transform: rotate(18deg);
}

.l2 {
  left: 30%;
  top: 69%;
  width: 46%;
  transform: rotate(-24deg);
}

.l3 {
  left: 56%;
  top: 41%;
  width: 30%;
  transform: rotate(39deg);
}

.metrics h3 {
  margin: 0;
  font-size: 1.15rem;
}

.metrics p {
  margin: 8px 0 10px;
  color: var(--muted);
}

.metrics ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.metrics li {
  border: 1px solid rgba(103, 166, 223, 0.3);
  border-radius: 11px;
  background: rgba(9, 17, 29, 0.7);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
}

.metrics li span {
  color: #c7d4e7;
}

.metrics li strong {
  color: var(--tech-soft);
  font-size: 1.05rem;
  letter-spacing: 0.03em;
}

.chip-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.chip {
  border-radius: 12px;
  padding: 14px;
  font-weight: 600;
  color: #d8e4f4;
  border-left: 3px solid var(--mars);
}

.timeline {
  margin: 0;
  padding: 18px;
  border-radius: 16px;
  list-style: none;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 24px;
  bottom: 24px;
  left: 20px;
  width: 2px;
  background: linear-gradient(180deg, rgba(73, 223, 255, 0.65), rgba(255, 122, 56, 0.5));
}

.timeline li {
  position: relative;
  padding: 4px 0 14px 40px;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 9px;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--tech);
  box-shadow: 0 0 0 4px rgba(73, 223, 255, 0.2);
}

.timeline span {
  color: var(--mars-soft);
  letter-spacing: 0.06em;
  font-size: 0.82rem;
  text-transform: uppercase;
}

.timeline h3 {
  margin: 2px 0 0;
  font-size: 1.03rem;
}

.about-card {
  border-radius: 16px;
  padding: 18px;
}

.about-card p {
  margin: 0;
  color: #d4deed;
}

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 16px 34px;
  color: var(--muted);
  border-top: 1px solid rgba(90, 153, 214, 0.26);
}

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

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

.hero .hero-content > * {
  opacity: 0;
  transform: translateY(16px);
  animation: intro 820ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.hero .hero-kicker { animation-delay: 120ms; }
.hero h1 { animation-delay: 220ms; }
.hero .hero-subtitle { animation-delay: 320ms; }
.hero .hero-actions { animation-delay: 420ms; }

@keyframes intro {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

input:focus-visible,
textarea:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

@media (min-width: 760px) {
  .system-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chip-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .featured-panel {
    grid-template-columns: 1.1fr 1fr;
    align-items: stretch;
    padding: 18px;
  }
}

@media (min-width: 980px) {
  .menu-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    opacity: 1;
    transform: none;
    pointer-events: auto;
    border: 0;
    padding: 0;
    display: flex;
    gap: 8px;
    background: transparent;
  }

  .site-header {
    padding: 12px 16px;
  }

  .system-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .chip-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 1ms !important;
    transition-delay: 0ms !important;
  }

  .reveal,
  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}