*,:after,:before{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#f0f2f5;color:#1a1a2e;min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:40px 16px}header{width:100%;max-width:560px;margin-bottom:32px}header p{margin-top:10px;font-size:.875rem;color:#6b7280;text-align:center}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}