:root{font-family:Arial,sans-serif;color:#163c2c;background:#edf6ef;font-size:20px}body{margin:0}main{max-width:500px;margin:10vh auto;padding:28px;background:white;border:2px solid #b4cdbb;border-radius:18px}h1{font-size:1.8rem}form{display:grid;gap:14px}input,button{font:inherit;padding:14px;border:2px solid #456c54;border-radius:9px;min-width:0}button{background:#166534;color:white;font-weight:bold;cursor:pointer}input:focus,button:focus{outline:4px solid #f0bb33;outline-offset:3px}[role=alert]{color:#8b1a1a;margin:0}.help{font-size:.9rem;line-height:1.5}@media(max-width:600px){main{margin:20px 12px;padding:20px}}