:root {
  --ink: #e6efff;
  --muted: #9ab0d4;
  --paper: #08101f;
  --card: #0f1b33;
  --line: #22385f;
  --accent: #59b8ff;
  --accent-ink: #9fd6ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Space Grotesk', sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 14% -4%, #12336f 0%, #08101f 45%, #060d1a 100%);
  line-height: 1.5;
}

.container {
  width: min(1100px, calc(100% - 2.5rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(8, 16, 31, 0.88);
  border-bottom: 1px solid var(--line);
}

.nav-shell {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-size: 1.65rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.primary-nav a {
  text-decoration: none;
  color: var(--ink);
  font-weight: 500;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 0.75rem;
  border: 1px solid var(--line);
  background: #122444;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 6px auto;
  background: var(--ink);
  transition: transform 0.25s ease;
}

.btn {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #06152b;
  text-decoration: none;
  padding: 0.7rem 1rem;
  border-radius: 0.75rem;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(53, 129, 228, 0.35);
}

.btn-ghost {
  background: transparent;
  color: var(--accent-ink);
}

.hero {
  padding: 4.5rem 0 3.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent-ink);
  font-size: 0.8rem;
  margin-bottom: 0.8rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  margin: 1.1rem auto 1.8rem;
  color: var(--muted);
  max-width: 94ch;
  text-align: center;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  min-height: 310px;
}

.orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(0.5px);
}

.orb-a {
  width: 210px;
  height: 210px;
  background: #1f4ca0;
  top: 0;
  right: 25px;
  animation: drift 5s ease-in-out infinite;
}

.orb-b {
  width: 160px;
  height: 160px;
  background: #2a6dc4;
  left: 10px;
  bottom: 14px;
  animation: drift 6s ease-in-out infinite reverse;
}

.device-card {
  position: absolute;
  inset: auto 0 35px 30px;
  max-width: 320px;
  background: rgba(12, 28, 52, 0.88);
  border: 1px solid #2a4d7e;
  border-radius: 1rem;
  padding: 1.15rem;
  box-shadow: 0 24px 35px rgba(0, 0, 0, 0.35);
}

.device-label {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.device-value {
  margin: 0.3rem 0;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-ink);
}

.device-note {
  margin: 0;
  color: var(--ink);
}

.device-note strong {
  color: var(--accent);
}

.section {
  padding: 3.2rem 0;
  align-items: center;
}

.section-title {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.section-subtitle {
  margin: 0.8rem 0 0;
  color: var(--muted);
  max-width: 62ch;
}

.features-grid {
  margin-top: 1.8rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.2rem;
}

.feature-card h3 {
  margin: 0;
  font-size: 1.1rem;
}

.feature-card p {
  margin: 0.6rem 0 0;
  color: var(--muted);
}

.section-science {
  padding-top: 1rem;
}

.science-layout {
  background: #0b162d;
  color: #eaf2ff;
  border-radius: 1.2rem;
  padding: 2rem;
  border: 1px solid #264a7c;
}

.science-layout p {
  color: #9db7df;
  max-width: 70ch;
}

.cta-panel {
  background: var(--card);
  border-radius: 1rem;
  border: 1px solid var(--line);
  padding: 2rem;
}

.waitlist-form {
  margin-top: 1.2rem;
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.waitlist-form input {
  flex: 1 1 260px;
  min-height: 44px;
  border-radius: 0.7rem;
  border: 1px solid var(--line);
  background: #0a1730;
  color: var(--ink);
  padding: 0 0.9rem;
  font: inherit;
}

.waitlist-form input::placeholder {
  color: #7f99c1;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0;
  margin-top: 2rem;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
}

.section h2 {
  margin: 0 0 1rem 0;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.section h3 {
  margin: 1.5rem 0 0.8rem 0;
  font-size: 1.1rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.section p {
  margin: 0.8rem 0;
  max-width: 85ch;
}

.section ul {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  text-align: left;
}

.section ul li {
  margin: 0.8rem 0;
  padding-left: 1.8rem;
  position: relative;
  color: var(--ink);
  max-width: 50ch;
}

.section ul li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.section a {
  color: var(--accent-ink);
  text-decoration: none;
  transition: color 0.2s ease;
}

.section a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.hero {
  padding: 5rem 0 3rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  margin: 0 auto 1.5rem;
  text-align: center;
}

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

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.in-view {
  opacity: 1;
  transform: none;
}

@keyframes drift {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-14px);
  }
}

@media (max-width: 920px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 240px;
  }

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

@media (max-width: 760px) {
  .menu-toggle {
    display: block;
  }

  .primary-nav {
    position: absolute;
    top: calc(100% + 6px);
    right: 1.25rem;
    left: 1.25rem;
    background: #0c1a33;
    border: 1px solid var(--line);
    border-radius: 0.8rem;
    display: grid;
    gap: 0.6rem;
    padding: 1rem;
    transform-origin: top;
    transform: scaleY(0.95);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease;
  }

  .primary-nav.is-open {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }

  .primary-nav .btn {
    text-align: center;
  }
}