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

:root {
  --brand: #2E7D52;
  --brand-dark: #245d40;
  --text: #111827;
  --muted: #6b7280;
  --bg: #ffffff;
  --card: #f9fafb;
  --radius: 12px;
}

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

/* NAV */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-bottom: 1px solid #e5e7eb;
}
.nav-logo {
  height: 40px;
  width: auto;
}
.btn-nav {
  padding: 0.4rem 1rem;
  border: 1.5px solid var(--brand);
  border-radius: 8px;
  color: var(--brand);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.btn-nav:hover { background: var(--brand); color: #fff; }

/* HERO */
.hero {
  max-width: 680px;
  margin: 0 auto;
  padding: 5rem 1.5rem 4rem;
  text-align: center;
}
.hero-icon {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin-bottom: 1.5rem;
}
.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
}
.tagline {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 520px;
  margin: 0 auto 2rem;
}
.btn-cta {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  padding: 0.85rem 2rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.15s, transform 0.1s;
}
.btn-cta:hover { background: var(--brand-dark); transform: translateY(-1px); }

/* FEATURES */
.features {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem 5rem;
}
.feature {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.75rem;
  flex: 1 1 240px;
  max-width: 280px;
}
.icon { font-size: 1.75rem; display: block; margin-bottom: 0.75rem; }
.feature h2 { font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; }
.feature p { font-size: 0.9rem; color: var(--muted); }

/* FOOTER */
footer {
  border-top: 1px solid #e5e7eb;
  padding: 1.25rem 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}
footer a { color: var(--muted); }

/* DARK MODE */
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f172a; --text: #f1f5f9; --card: #1e293b; --muted: #94a3b8; }
  .nav, footer { border-color: #1e293b; }
}

@media (max-width: 600px) {
  .hero { padding: 3rem 1.25rem 2.5rem; }
  .features { padding-bottom: 3rem; }
}