:root {
  --bg: #f7f9fb;
  --text: #1f2933;
  --muted: #5f6f7f;
  --primary: #0f766e;
  --primary-dark: #115e59;
  --card: #ffffff;
  --border: #d9e2ec;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.hero {
  background:
    linear-gradient(rgba(15, 118, 110, 0.88), rgba(17, 94, 89, 0.9)),
    radial-gradient(circle at top left, #67e8f9, transparent 35%);
  color: white;
  padding: 24px;
}

nav {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}

.logo {
  font-weight: 800;
  letter-spacing: 0.04em;
}

.nav-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav-links a {
  color: white;
  text-decoration: none;
  font-size: 0.95rem;
  opacity: 0.92;
}

.hero-content {
  max-width: 900px;
  margin: 90px auto 80px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  opacity: 0.85;
}

h1 {
  max-width: 850px;
  margin: 12px 0 18px;
  font-size: clamp(2.2rem, 6vw, 4.7rem);
  line-height: 1.05;
}

.hero-content p {
  max-width: 760px;
  font-size: 1.2rem;
  opacity: 0.95;
}

.button {
  display: inline-block;
  margin-top: 24px;
  padding: 12px 20px;
  background: white;
  color: var(--primary-dark);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}

.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 70px 24px;
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 18px;
}

.section p {
  max-width: 900px;
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.04);
}

.card h3 {
  margin-top: 0;
  color: var(--primary-dark);
}

.workflow,
.outputs {
  background: white;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 26px 32px;
}

.workflow li,
.outputs li {
  margin-bottom: 12px;
}

.small {
  font-size: 0.95rem;
}

footer {
  text-align: center;
  padding: 30px 20px;
  background: #0f172a;
  color: white;
}

@media (max-width: 850px) {
  nav {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero-content {
    margin: 60px auto;
  }
}