#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f5f5f5;height:100vh}:root{--bg:#f5f7fb;--card:#fff;--primary:linear-gradient(90deg,#06f,#00a0ff);--accent:#00a0ff;--text:#111827;--muted:#6b7280;--tips:#ff5050;--radius-lg:8px;--radius-sm:4px;--shadow-sm:0 6px 18px rgba(15,23,42,0.06);--shadow-xs:0 2px 8px rgba(15,23,42,0.04);--glass:hsla(0,0%,100%,0.6)}