:root{--brand: #2563eb;--brand-2: #0ea5e9;--accent: #f59e0b;--radius: 12px;--font: "Segoe UI", system-ui, -apple-system, sans-serif}:root[data-theme=dark]{--bg: #0b1120;--bg-elev: #111a2e;--surface: #16203a;--surface-2: #1e293b;--border: #243049;--text: #e6ecf5;--text-dim: #94a3b8;--shadow: 0 8px 30px rgba(0, 0, 0, .45)}:root[data-theme=light]{--bg: #f1f5f9;--bg-elev: #ffffff;--surface: #ffffff;--surface-2: #f8fafc;--border: #e2e8f0;--text: #0f172a;--text-dim: #64748b;--shadow: 0 6px 24px rgba(15, 23, 42, .08)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:var(--font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}a{color:var(--brand-2);text-decoration:none}button{font-family:inherit;cursor:pointer}.app-shell{display:grid;grid-template-columns:248px 1fr;height:100vh}.sidebar{background:var(--bg-elev);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:18px 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