:root {
  --green: #2d6a4f;
  --green-light: #40916c;
  --bg: #fafaf9;
  --text: #1a1a1a;
  --gray: #6b7280;
  --border: #e5e7eb;
  --max-w: 48rem;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; color: var(--text); background: var(--bg); line-height: 1.7; }

nav { display: flex; align-items: center; gap: 2rem; padding: 1rem 2rem; border-bottom: 1px solid var(--border); background: #fff; position: sticky; top: 0; z-index: 10; }
nav .logo { font-weight: 700; color: var(--green); text-decoration: none; font-size: 1.1rem; }
nav .nav-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }
nav .nav-links a { text-decoration: none; color: var(--gray); font-size: 0.9rem; }
nav .nav-links a:hover, nav .nav-links a.active { color: var(--green); }

main { max-width: var(--max-w); margin: 2rem auto; padding: 0 1.5rem; }

article h1 { font-size: 2rem; margin-bottom: 0.5rem; color: var(--green); }
.lead { font-size: 1.1rem; color: var(--gray); margin-bottom: 1rem; }
.meta { font-size: 0.85rem; color: var(--gray); margin-bottom: 2rem; }

.content h2 { font-size: 1.4rem; margin: 2rem 0 0.75rem; color: var(--green); border-bottom: 1px solid var(--border); padding-bottom: 0.3rem; }
.content h3 { font-size: 1.15rem; margin: 1.5rem 0 0.5rem; }
.content p { margin-bottom: 1rem; }
.content ul, .content ol { margin: 0.5rem 0 1rem 1.5rem; }
.content li { margin-bottom: 0.3rem; }
.content table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.9rem; }
.content th, .content td { padding: 0.5rem 0.75rem; border: 1px solid var(--border); text-align: left; }
.content th { background: var(--green); color: #fff; }
.content blockquote { border-left: 3px solid var(--green-light); padding: 0.5rem 1rem; margin: 1rem 0; color: var(--gray); background: #f0fdf4; }
.content strong { color: var(--text); }

.hero { text-align: center; padding: 4rem 1rem; }
.hero h1 { font-size: 2.2rem; color: var(--green); margin-bottom: 1rem; }
.hero p { font-size: 1.1rem; color: var(--gray); max-width: 36rem; margin: 0 auto 2rem; }
.cta { display: inline-block; background: var(--green); color: #fff; padding: 0.75rem 2rem; border-radius: 6px; text-decoration: none; font-weight: 600; }
.cta:hover { background: var(--green-light); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); gap: 1.5rem; margin-top: 2rem; }
.card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 1.5rem; }
.card h3 a { color: var(--green); text-decoration: none; }
.card p { font-size: 0.9rem; color: var(--gray); margin-top: 0.5rem; }

.related { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
.related h2 { font-size: 1.2rem; margin-bottom: 0.75rem; }
.related a { color: var(--green); }

footer { text-align: center; padding: 2rem; color: var(--gray); font-size: 0.85rem; border-top: 1px solid var(--border); margin-top: 4rem; }

@media (max-width: 640px) {
  nav { flex-direction: column; gap: 0.5rem; }
  .hero h1 { font-size: 1.6rem; }
  .grid { grid-template-columns: 1fr; }
}