body{font-family:system-ui,sans-serif;max-width:720px;margin:0 auto;padding:16px;line-height:1.5}
header h1{margin:0}input,button{font-size:1rem;padding:10px;margin:4px 0}button{cursor:pointer}
.nota{color:#555;font-size:.9rem}article{border:1px solid #ddd;border-radius:8px;padding:12px;margin:8px 0}