:root{--hub-height:58px;--bg:#f4f5f7;--bar:rgba(255,255,255,0.96);--text:#18191b;--muted:#6d7178;--line:#e6e8eb;--active:#18191b;--active-text:#fff;--radius:12px}*{box-sizing:border-box}body,html{margin:0;width:100%;height:100%;overflow:hidden}body{font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text)}button,input{font:inherit}button{-webkit-tap-highlight-color:transparent}