:root{--bg: #0f172a;--card: #1e293b;--card-2: #273548;--border: #334155;--text: #e2e8f0;--muted: #94a3b8;--accent: #3b82f6;--green: #22c55e;--red: #ef4444;--orange: #f97316;--yellow: #fbbf24;--purple: #a78bfa}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:14px}.app{display:grid;grid-template-columns:220px 1fr;height:100vh}.sidebar{background:var(--card);border-right:1px solid var(--border);padding:18px 12px;overflow-y:auto}.brand{font-size:14px;font-weight:600;color:var(--text);padding:0 8px 16px;border-bottom:1px solid var(--border);margin-bottom:14px}.brand-accent{color:var(--yellow)}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 10px;margin-bottom:2px;border-radius:8px;cursor:pointer;color:var(--muted);font-size:13px;transition:background .15s,color .15s;border:1px solid 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