:root{--blue:#0b61e8;--navy:#0d203e;--muted:#6d7c93;--line:#dfe6f0;--bg:#f5f8fc;--shadow:0 18px 50px rgba(20,48,92,.12)}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#15233b;background:var(--bg)}button,input,select,textarea{font:inherit}.app-shell{display:grid;grid-template-columns:220px 1fr;min-height:100vh}.sidebar{background:#fff;border-right:1px solid var(--line);padding:18px 12px;position:sticky;top:0;height:100vh;z-index:20}.brand,.auth-brand{display:flex;align-items:center;gap:10px;padding:2px 8px 20px}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,#0f5fe4,#d1a94a);color:#fff;font-weight:900}.brand strong{font-size:18px}.brand 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