:root{font:16px system-ui;color:#18212f;background:#f5f7fa}main{max-width:960px;margin:4rem auto;padding:2rem;background:white;border-radius:12px}form{display:grid;gap:1rem;max-width:24rem}label{display:grid;gap:.3rem}input,button{padding:.7rem}#freshness{padding:1rem;background:#e8f4ef;border-left:4px solid #16805b}nav{margin:1.5rem 0}pre{white-space:pre-wrap}