/* ── Design tokens & base reset ── */
:root{
  --bg:#fff;--soft:#FAFAFA;--soft2:#F4F4F4;--panel:#fff;
  --ink:#141414;--ink2:#555;--ink3:#999;
  --line:#EBEBEB;--line2:#D8D8D8;
  --o:#E85A0C;--od:#A03D04;--ol:#FEF0E8;
  --nc:#F34829;--ncd:#D93A20;
  --r:11px;
  --nav-w:200px;--nav-col:60px;
  --sans:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
  --mono:ui-monospace,'SF Mono',Menlo,Consolas,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:var(--sans);font-size:14px;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:14px}

/* ── Shell ── */
#app{display:none;height:100vh;overflow:hidden}
.shell{display:flex;height:100%}