*{box-sizing:border-box}body{color:#2b2b2b;background:#f5f2ea;margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}.app-header{color:#fff;background:#3d5a3a;padding:16px 20px}.app-header h1{margin:0;font-size:1.5rem}.app-main{max-width:900px;margin:0 auto;padding:20px 16px}.intro{font-size:1.05rem}.card-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;margin-top:20px;display:grid}.card{background:#fff;border:1px solid #ddd6c4;border-radius:10px;padding:16px}.card h2{color:#3d5a3a;margin:0 0 6px;font-size:1.2rem}.card p{color:#555;margin:0}