*{box-sizing:border-box}body{margin:0;font-family:system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:#222}a{color:inherit;text-decoration:none}.container{max-width:1100px;margin:0 auto;padding:24px}.btn{background:#28a745;color:#fff;border:none;border-radius:8px;padding:12px 18px;cursor:pointer}.card{border:1px solid #eee;border-radius:12px;padding:16px}.grid{display:grid;grid-gap:16px;gap:16px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;border-bottom:1px solid #eee}footer{border-top:1px solid #eee;margin-top:40px;padding:20px;color:#666;font-size:.9rem}