:root{--bg: #f4f6f8;--surface: #ffffff;--border: #e2e8f0;--text: #1a202c;--text-dim: #64748b;--brand: #0e7490;--brand-hover: #155e75;--brand-soft: #ecfeff;--danger: #dc2626;--danger-soft: #fef2f2;--ok: #16a34a;--ok-soft: #f0fdf4;--warn: #d97706;--warn-soft: #fffbeb;--sidebar: #0f172a;--sidebar-text: #cbd5e1;--radius: 8px;--shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .04);--mono: ui-monospace, SFMono-Regular, Menlo, monospace}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font:14px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text)}.shell{display:flex;min-height:100vh}.sidebar{width:220px;flex-shrink:0;background:var(--sidebar);color:var(--sidebar-text);display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.sidebar .logo{padding:18px 20px;font-size:16px;font-weight:700;color:#fff;letter-spacing:.2px;border-bottom:1px solid rgba(255,255,255,.08)}.sidebar .logo 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