:root {
  --primary: #2f855a;
  --primary-light: #48bb78;
  --bg-body: #f0fff4;
  --bg-card: #ffffff;
  --text-primary: #22543d;
  --text-secondary: #4a5568;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --radius: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Nunito', sans-serif; background: var(--bg-body); color: var(--text-primary); }
a { color: var(--primary); text-decoration: none; }

header { background: #fff; padding: 1rem; box-shadow: var(--shadow); position: sticky; top: 0; z-index: 50; }
.header-container { max-width: 1100px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.5rem; color: var(--primary); font-weight: 800; display: flex; align-items: center; gap: 0.5rem; }
nav ul { display: flex; gap: 1rem; list-style: none; }
nav a { background: var(--bg-body); padding: 0.5rem 1rem; border-radius: 20px; font-weight: 600; transition: all 0.2s; }
nav a:hover { background: var(--primary); color: white; }

main { max-width: 1100px; margin: 0 auto; padding: 2rem; }
.hero { background: var(--primary); color: white; border-radius: var(--radius); padding: 4rem 2rem; text-align: center; margin-bottom: 3rem; box-shadow: var(--shadow); }
.hero h1 { color: white; margin-bottom: 1rem; }
.hero p { color: #f0fff4; font-size: 1.1rem; }

.articles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.article-card { background: var(--bg-card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: transform 0.3s ease; }
.article-card:hover { transform: translateY(-5px); }
.article-card img { width: 100%; height: 200px; object-fit: cover; }
.article-card-content { padding: 1.5rem; }
.article-card h3 { color: var(--primary); margin-bottom: 0.5rem; }
.read-more { display: inline-block; background: var(--primary-light); color: white; padding: 0.5rem 1rem; border-radius: 20px; margin-top: 1rem; font-size: 0.9rem; }
.read-more:hover { background: var(--primary); }

footer { background: var(--primary); color: white; padding: 3rem 0; text-align: center; margin-top: 4rem; }
.footer-links a { color: #f0fff4; margin: 0 0.5rem; }