body{font-family:system-ui,sans-serif;max-width:720px;margin:0 auto;padding:1.5rem;color:#1a1a1a}input,select,button{font-size:1rem;padding:.4rem}nav a{margin-right:1rem}.card{border:1px solid #ddd;border-radius:8px;padding:1rem;margin-bottom:1rem}