:root{--navy:#123a5a;--blue:#2678aa;--ink:#173042;--muted:#6c7f8d;--line:#dce6eb;--bg:#f5f8fa;--green:#258a68;--red:#d55353;--amber:#d18a2c}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,Helvetica,sans-serif}button,input,select,textarea{font:inherit}.app-shell{min-height:100vh}.app-shell>aside{position:fixed;inset:0 auto 0 0;width:250px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:10}.brand{height:92px;display:flex;align-items:center;gap:12px;padding:20px 22px;border-bottom:1px solid var(--line)}.brand-mark{width:42px;height:42px;border-radius:12px;background:linear-gradient(145deg,var(--blue),var(--navy));color:#fff;display:grid;place-items:center;font-size:24px;font-weight:800}.brand strong{display:block;text-transform:uppercase;letter-spacing:.08em;font-size:16px;color:var(--navy)}.brand span,.user span{display:block;color:var(--muted);font-size:11px;margin-top:3px}.app-shell aside 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