:root {
  color-scheme: light dark;
  --primary: #2f855a;
  --primary-dark: #276749;
  --background: #0f172a;
  --text: #0b1120;
  --muted: #475569;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: inherit;
  color: var(--text);
  background-color: #f8fafc;
  line-height: 1.6;
}

header {
  background: linear-gradient(135deg, #0f172a 0%, #1f2937 60%, #166534 100%);
  color: #f8fafc;
  padding: 60px 32px 80px;
}

header .container {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.nav-links {
  display: flex;
  gap: 20px;
  font-size: 16px;
}

.nav-links a {
  color: #e2e8f0;
  text-decoration: none;
  font-weight: 600;
}

.nav-links a:hover {
  text-decoration: underline;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: center;
  gap: 32px;
}

.hero h1 {
  font-size: clamp(32px, 6vw, 56px);
  margin-bottom: 16px;
}

.hero p {
  font-size: 18px;
  color: #cbd5f5;
  margin-bottom: 32px;
}

.cta-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 999px;
  border: none;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
  box-shadow: 0 10px 30px rgba(22, 101, 52, 0.35);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: rgba(241, 245, 249, 0.2);
  color: #e2e8f0;
  border: 1px solid rgba(226, 232, 240, 0.4);
}

main {
  padding: 64px 32px;
}

section {
  max-width: 920px;
  margin: 0 auto 80px;
}

section h2 {
  font-size: 32px;
  margin-bottom: 16px;
  color: #0f172a;
}

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

.feature-card {
  background: white;
  padding: 24px;
  border-radius: 20px;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(203, 213, 225, 0.4);
}

.feature-card h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 20px;
  color: var(--primary-dark);
}

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

.cta-banner {
  background: linear-gradient(135deg, #14532d 0%, #15803d 60%, #2f855a 100%);
  color: white;
  padding: 48px;
  border-radius: 28px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  align-items: center;
  gap: 24px;
}

.cta-banner p {
  margin: 0;
  font-size: 18px;
}

footer {
  background: #0f172a;
  color: #cbd5f5;
  padding: 32px;
  text-align: center;
  font-size: 14px;
}

footer a {
  color: #facc15;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  header {
    padding: 40px 20px 60px;
  }

  main {
    padding: 48px 20px;
  }

  .nav {
    flex-direction: column;
    gap: 16px;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}