:root{--bg:#070a12;--surface:#0d1220;--surface2:#12192b;--line:#202a40;--text:#f3f6ff;--muted:#8f9bb2;--blue:#2878ff;--blue2:#55a4ff;--green:#27d59b;--red:#ff5f75;--amber:#f5b73b;--shadow:0 18px 50px rgba(0,0,0,.35)}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;background:radial-gradient(circle at 80% 0,#132149 0,transparent 30%),var(--bg);color:var(--text)}button,input,select,textarea{font:inherit}.app-shell{display:grid;grid-template-columns:250px 1fr;min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;padding:24px 18px;border-right:1px solid var(--line);background:rgba(9,13,24,.92);backdrop-filter:blur(20px);display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:12px;padding:0 8px 26px}.brand-mark{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;font-weight:900;background:linear-gradient(135deg,var(--blue),#6d4aff);box-shadow:0 10px 28px 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