:root {
  --bg: #060b17;
  --bg-alt: #0b1226;
  --accent: #4ade80;
  --accent-strong: #2dd4bf;
  --text: #e8f0ff;
  --muted: #9fb3d2;
  --card: rgba(255, 255, 255, 0.03);
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 10px 50px rgba(0, 0, 0, 0.4);
  --radius: 14px;
  --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: radial-gradient(circle at 20% 20%, rgba(45, 212, 191, 0.08), transparent 30%),
    radial-gradient(circle at 80% 0%, rgba(74, 222, 128, 0.08), transparent 25%),
    linear-gradient(135deg, var(--bg), var(--bg-alt));
  background-color: var(--bg);
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background: transparent;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-strong);
}

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

header.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 80px 0 120px;
}

.hero-inner {
  text-align: center;
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.logo {
  font-size: clamp(32px, 6vw, 56px);
  letter-spacing: 0.04em;
  font-weight: 800;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.logo .delta {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  display: grid;
  place-items: center;
  font-size: 22px;
  color: #02101f;
  box-shadow: 0 10px 25px rgba(45, 212, 191, 0.35);
}

.hero h1 {
  font-size: clamp(34px, 6vw, 58px);
  margin: 22px 0 12px;
}

.hero p.subhead {
  font-size: clamp(16px, 3vw, 20px);
  color: var(--muted);
  margin: 0 auto 28px;
  max-width: 640px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, border-color 180ms ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #04101e;
  box-shadow: 0 15px 40px rgba(45, 212, 191, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 50px rgba(45, 212, 191, 0.45);
}

.section {
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.section h2 {
  font-size: clamp(26px, 4.5vw, 36px);
  margin-bottom: 16px;
}

.section p.section-intro {
  color: var(--muted);
  max-width: 640px;
}

.features-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: 32px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: -1px;
  background: linear-gradient(135deg, rgba(45, 212, 191, 0.18), rgba(45, 212, 191, 0));
  opacity: 0;
  transition: opacity 180ms ease;
  z-index: 0;
}

.card:hover::before {
  opacity: 1;
}

.card-content {
  position: relative;
  z-index: 1;
}

.card .icon {
  font-size: 22px;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(45, 212, 191, 0.12);
  color: var(--accent);
  margin-bottom: 12px;
}

footer {
  padding: 28px 0 48px;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.1);
}

footer .links {
  display: inline-flex;
  gap: 14px;
  margin-top: 10px;
}

.badge-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 18px;
}

.badge {
  background: rgba(45, 212, 191, 0.12);
  color: var(--accent);
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(45, 212, 191, 0.3);
  font-weight: 600;
  font-size: 14px;
}

.parallax-orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(0px);
  opacity: 0.35;
  pointer-events: none;
}

.orb-1 {
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(45, 212, 191, 0.45), transparent 60%);
  top: -40px;
  left: -60px;
}

.orb-2 {
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(74, 222, 128, 0.3), transparent 60%);
  bottom: 60px;
  right: -40px;
}

.grid-lines {
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 120px 120px;
  opacity: 0.07;
  z-index: 0;
  transform: translateZ(0);
}

.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.presentation-section {
  margin-bottom: 60px;
}

.presentation-section h3 {
  margin: 0 0 10px;
  font-size: clamp(20px, 3.2vw, 28px);
}

.presentation-section p,
.presentation-section li {
  color: var(--muted);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.metric-card {
  padding: 18px;
  border-radius: var(--radius);
  border: 1px dashed rgba(45, 212, 191, 0.4);
  background: rgba(255, 255, 255, 0.02);
  text-align: left;
}

@media (max-width: 640px) {
  header.hero {
    padding: 60px 0 90px;
  }

  .logo .delta {
    width: 32px;
    height: 32px;
  }
}