:root {
  color-scheme: dark light;
  --surface: #050510;
  --surface-alt: #0a0a1a;
  --surface-card: rgba(255, 255, 255, 0.04);
  --surface-card-border: rgba(255, 255, 255, 0.08);
  --primary: #62fbd6;
  --primary-soft: rgba(98, 251, 214, 0.1);
  --accent: #5a6dff;
  --text: #f5f7ff;
  --text-muted: rgba(245, 247, 255, 0.72);
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --max-width: 1100px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --shadow-soft: 0 20px 40px rgba(15, 20, 40, 0.35);
}

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

html {
  scroll-behavior: smooth;
  background: var(--surface);
}

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: radial-gradient(circle at 20% 20%, rgba(98, 251, 214, 0.12), transparent 55%),
    radial-gradient(circle at 80% 10%, rgba(90, 109, 255, 0.18), transparent 50%),
    var(--surface);
  min-height: 100vh;
  line-height: 1.6;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

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

a:hover,
a:focus {
  text-decoration: underline;
}

.section {
  padding: 120px 5vw;
}

.section-heading {
  max-width: 640px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin-bottom: 16px;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.section-heading p {
  color: var(--text-muted);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5, 5, 16, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 5vw;
}

.brand {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav ul {
  display: flex;
  gap: 20px;
  list-style: none;
}

.site-nav a {
  font-size: 0.94rem;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--text);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  background: transparent;
  color: inherit;
  position: relative;
  justify-content: center;
  align-items: center;
  gap: 6px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
}

.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;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 48px;
  align-items: center;
  padding-top: 160px;
}

.hero-content {
  max-width: 580px;
}

.eyebrow {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  color: var(--primary);
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2.4rem, 4vw, 3.6rem);
  margin-bottom: 20px;
  line-height: 1.1;
}

.lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  gap: 20px;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.primary-btn {
  background: linear-gradient(135deg, var(--primary), #60b9ff);
  color: #041010;
  box-shadow: var(--shadow-soft);
}

.primary-btn:hover,
.primary-btn:focus {
  transform: translateY(-1px);
  box-shadow: 0 30px 50px rgba(98, 251, 214, 0.35);
}

.secondary-btn {
  border-color: rgba(255, 255, 255, 0.16);
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.secondary-btn:hover,
.secondary-btn:focus {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.hero-visual {
  position: relative;
  min-height: 320px;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(0px);
  opacity: 0.8;
}

.orb-primary {
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(98, 251, 214, 0.8), transparent 65%);
  top: 10%;
  right: 10%;
}

.orb-secondary {
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(90, 109, 255, 0.7), transparent 60%);
  bottom: 5%;
  left: 5%;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.card {
  border: 1px solid var(--surface-card-border);
  border-radius: var(--radius-md);
  padding: 28px;
  background: var(--surface-card);
  min-height: 190px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover,
.card:focus-within {
  border-color: rgba(98, 251, 214, 0.6);
  transform: translateY(-4px);
}

.card h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.product-feature {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 50px;
  align-items: stretch;
}

.product-copy ul {
  margin: 24px 0;
  padding-left: 18px;
  color: var(--text-muted);
}

.product-copy li {
  margin-bottom: 10px;
}

.product-glance {
  display: flex;
  align-items: center;
  justify-content: center;
}

.glance-card {
  min-width: 220px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(98, 251, 214, 0.45);
  background: rgba(98, 251, 214, 0.08);
  padding: 28px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-family: var(--font-mono);
}

.glance-card span {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.85rem;
}

.glance-card .stack {
  display: grid;
  gap: 10px;
  font-size: 1.05rem;
}

.labs {
  background: linear-gradient(180deg, rgba(98, 251, 214, 0.07), transparent);
}

.labs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.lab-card {
  border-radius: var(--radius-md);
  border: 1px solid rgba(90, 109, 255, 0.4);
  background: rgba(90, 109, 255, 0.08);
  padding: 28px;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.collaboration-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
  margin-bottom: 48px;
}

.collaboration-grid article {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 24px;
  background: rgba(4, 10, 28, 0.7);
}

.collaboration-grid h3 {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.about {
  display: flex;
  justify-content: center;
}

.about-card {
  max-width: 720px;
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  padding: 40px;
  text-align: center;
  display: grid;
  gap: 16px;
}

.contact-line a {
  color: var(--primary);
}

.site-footer {
  padding: 40px 5vw;
  text-align: center;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(5, 5, 16, 0.86);
}

@media (max-width: 900px) {
  .site-nav ul {
    position: absolute;
    top: 72px;
    right: 5vw;
    background: rgba(5, 5, 16, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    padding: 20px;
    flex-direction: column;
    gap: 16px;
    display: none;
    min-width: 220px;
  }

  .site-nav ul.open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .hero {
    padding-top: 120px;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 90px 6vw;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .primary-btn,
  .secondary-btn {
    width: 100%;
  }
}