:root {
  --ink: #26282b;
  --muted: #6b7076;
  --bg: #fbfaf8;
  --accent: #3c6e5a;
  --border: #e6e3dd;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
}

.brand { font-weight: 700; font-size: 1.1rem; }

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 24px;
  font-size: 0.95rem;
}
nav a:hover { color: var(--ink); }

main { max-width: 720px; margin: 0 auto; padding: 0 24px; }

.hero { padding: 80px 0 40px; }
.hero h1 { font-size: 2.1rem; margin-bottom: 12px; }
.hero p { color: var(--muted); font-size: 1.1rem; max-width: 520px; }

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding: 40px 0;
}
.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}
.card h3 { margin: 0 0 8px; color: var(--accent); }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.about, .contact { padding: 40px 0; border-top: 1px solid var(--border); }
.about p, .contact p { color: var(--muted); }

footer {
  text-align: center;
  padding: 40px 24px;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 600px) {
  .features { grid-template-columns: 1fr; }
  header { padding: 16px 20px; }
}