:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,PingFang SC,Microsoft YaHei,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.5rem;text-align:center;padding:2rem}