:root{--bg: #f0f2f5;--surface: #ffffff;--border: #e2e8f0;--text: #1a2233;--text-muted: #64748b;--primary: #2554c7;--primary-hover: #1c3f9e;--primary-light: #eff4ff;--danger: #c0392b;--success: #1e8e5a;--warn: #b7791f;--radius: 6px;--sidebar-w: 228px;--topbar-h: 52px;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}html,body,#app{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-size:14px}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}h1{font-size:20px;font-weight:700;margin:0 0 16px}h2{font-size:16px;font-weight:600;margin:0 0 12px}h3{font-size:11px;font-weight:700;margin:0 0 8px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em}.layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:#0f172a;color:#cbd5e1;display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100;overflow-y:auto;transition:transform .25s 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