:root{--bg:#f4f6fb;--panel:#fff;--text:#1b2331;--muted:#5a667c;--line:#d9dfeb;--accent:#0f766e}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}a{color:inherit;text-decoration:none}