body{font-family:system-ui,sans-serif;max-width:480px;margin:0 auto;padding:1rem}nav{display:flex;gap:.5rem;margin-bottom:1rem}nav button{flex:1;padding:.5rem}.sneeze-button{font-size:1.5rem;padding:2rem;width:100%;border-radius:12px;background:#4f46e5;color:#fff;border:none}form{display:flex;flex-direction:column;gap:.5rem;margin-bottom:1.5rem}.error{color:#dc2626;min-height:1.2em}.tabs{display:flex;gap:.5rem;margin-bottom:1rem}.tabs button.active{font-weight:700;text-decoration:underline}