:root {
  --background: #f4f5f7;
  --foreground: #0f172a;
  --muted: rgba(15, 23, 42, 0.68);
  --line: rgba(15, 23, 42, 0.1);
  --surface: rgba(255, 255, 255, 0.7);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --accent: #5b7cfa;
  --accent-soft: rgba(91, 124, 250, 0.16);
  --glow: rgba(94, 120, 255, 0.34);
  --shadow: 0 24px 80px rgba(15, 23, 42, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #050816;
    --foreground: #f5f7ff;
    --muted: rgba(245, 247, 255, 0.7);
    --line: rgba(255, 255, 255, 0.1);
    --surface: rgba(10, 14, 31, 0.65);
    --surface-strong: rgba(13, 18, 38, 0.9);
    --accent: #86a3ff;
    --accent-soft: rgba(134, 163, 255, 0.16);
    --glow: rgba(111, 144, 255, 0.42);
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(129, 154, 255, 0.22), transparent 28%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.72), transparent 24%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.7), transparent 30%),
    var(--background);
  color: var(--foreground);
  font-family: "Geist", Arial, Helvetica, sans-serif;
}

@media (prefers-color-scheme: dark) {
  body {
    background:
      radial-gradient(circle at top left, rgba(95, 122, 255, 0.28), transparent 28%),
      radial-gradient(circle at 80% 20%, rgba(55, 71, 132, 0.2), transparent 24%),
      linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 30%),
      var(--background);
  }
}

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

.site-shell {
  width: min(1200px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0 5rem;
}

.hero-section,
.statement-section,
.pillars-section,
.signal-section,
.cta-section {
  position: relative;
}

.hero-section {
  padding: 1rem 0 3rem;
}

.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0 2rem;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.brand-symbol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(16px);
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.3rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.nav-cta,
.button.secondary {
  border: 1px solid var(--line);
  background: var(--surface);
  backdrop-filter: blur(16px);
}

.button.primary {
  background: linear-gradient(135deg, var(--foreground), color-mix(in srgb, var(--foreground) 82%, white));
  color: var(--background);
  box-shadow: 0 18px 40px color-mix(in srgb, var(--foreground) 20%, transparent);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 3rem;
  align-items: center;
  min-height: calc(100vh - 10rem);
}

.hero-copy {
  max-width: 38rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

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

h1 {
  font-size: clamp(2.8rem, 6.8vw, 5.4rem);
  line-height: 0.96;
  letter-spacing: -0.07em;
  max-width: 10ch;
}

h2 {
  font-size: clamp(2rem, 5vw, 3.8rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

h3 {
  font-size: 1.35rem;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.hero-lede,
.statement-section p,
.cta-section p:last-of-type,
.pillar-card span {
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.7;
}

.hero-lede {
  max-width: 34rem;
  margin-top: 1.5rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.keynote-visual {
  display: flex;
  justify-content: center;
}

.visual-stage {
  position: relative;
  width: min(100%, 440px);
  aspect-ratio: 1 / 1.08;
  border: 1px solid var(--line);
  border-radius: 2.25rem;
  background: linear-gradient(180deg, var(--surface-strong), var(--surface));
  box-shadow: var(--shadow);
  overflow: hidden;
  backdrop-filter: blur(28px);
}

.visual-stage::before,
.visual-stage::after {
  content: "";
  position: absolute;
  inset: auto;
  border-radius: 999px;
  background: radial-gradient(circle, var(--glow), transparent 68%);
  filter: blur(10px);
}

.visual-stage::before {
  top: 10%;
  left: 15%;
  width: 12rem;
  height: 12rem;
}

.visual-stage::after {
  right: 10%;
  bottom: 8%;
  width: 14rem;
  height: 14rem;
}

.fusion-core {
  position: absolute;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  width: 12rem;
  height: 12rem;
  border-radius: 50%;
  background: linear-gradient(135deg, color-mix(in srgb, var(--surface-strong) 90%, white), transparent), var(--surface-strong);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  text-align: center;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 0 80px var(--accent-soft);
}

.fusion-core span {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.signal-ring,
.signal-path {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.signal-ring {
  border-radius: 50%;
  animation: pulse 8s ease-in-out infinite;
}

.ring-one {
  inset: 12% 16%;
}

.ring-two {
  inset: 20% 24%;
  animation-delay: -3s;
}

.signal-path {
  background: linear-gradient(90deg, transparent, var(--accent-soft), transparent);
  height: 1px;
}

.path-one {
  top: 33%;
  left: 8%;
  width: 45%;
  transform: rotate(18deg);
}

.path-two {
  right: 10%;
  bottom: 27%;
  width: 38%;
  transform: rotate(-24deg);
}

.metric-chip {
  position: absolute;
  display: grid;
  gap: 0.25rem;
  min-width: 7rem;
  padding: 0.8rem 1rem;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: color-mix(in srgb, var(--surface-strong) 88%, transparent);
  box-shadow: var(--shadow);
  font-size: 0.9rem;
  backdrop-filter: blur(20px);
}

.metric-chip strong {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.chip-one {
  top: 16%;
  left: 8%;
}

.chip-two {
  top: 18%;
  right: 8%;
}

.chip-three {
  bottom: 14%;
  left: 14%;
}

.statement-section,
.signal-section,
.cta-section {
  padding: 3rem 0;
}

.statement-section {
  max-width: 54rem;
  padding-top: 0;
}

.pillars-section {
  padding: 4rem 0 3rem;
}

.section-heading {
  display: grid;
  gap: 0.9rem;
  max-width: 46rem;
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.pillar-card {
  display: grid;
  gap: 1rem;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 1.75rem;
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface-strong) 94%, transparent), var(--surface));
  box-shadow: var(--shadow);
}

.pillar-card p,
.signal-list span {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.signal-section {
  display: grid;
  gap: 1.5rem;
}

.signal-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.signal-list span {
  padding: 0.8rem 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}

.cta-section {
  display: grid;
  gap: 1rem;
  max-width: 40rem;
}

.button:hover,
.nav-cta:hover {
  transform: translateY(-1px);
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.45;
  }

  50% {
    transform: scale(1.035);
    opacity: 1;
  }
}

@media (max-width: 980px) {
  .hero-grid,
  .pillar-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    min-height: auto;
    gap: 2rem;
  }

  .keynote-visual {
    order: -1;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(100% - 1.25rem, 1200px);
  }

  .top-nav {
    padding-bottom: 1.5rem;
  }

  .brand-mark span:last-child,
  .nav-cta {
    font-size: 0.88rem;
  }

  .visual-stage {
    border-radius: 1.75rem;
  }

  .fusion-core {
    width: 9.5rem;
    height: 9.5rem;
  }

  .metric-chip {
    min-width: 6rem;
    padding: 0.7rem 0.85rem;
  }
}