:root{--bg: #f6f7fb;--surface: #ffffff;--border: #e5e7f0;--text: #1f2333;--text-muted: #6b7080;--primary: #7c6ff0;--primary-dark: #6355e0;--danger: #e0556f;--ok: #3fb28a;--radius: 12px;--shadow: 0 1px 3px rgba(20, 20, 40, .06)}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Pretendard,Roboto,sans-serif;background:var(--bg);color:var(--text)}:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}.app-shell{display:flex;min-height:100vh}.bottom-nav{display:none}.sidebar{width:220px;flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);padding:20px 14px;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:10px;padding:0 8px 20px}.brand-mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--primary),#a78bfa);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px}.brand-title{font-weight:700;font-size:15px}.brand-sub{font-size:11px;color:var(--text-muted)}.nav{display:flex;flex-direction:column;gap:2px}.nav-link{display:block;padding:10px 12px;border-radius:8px;color:var(--text-muted);text-decoration:none;font-size:14px;font-weight:500}.nav-link:hover{background:#f1f0ff;color:var(--text)}.nav-link.active{background:var(--primary);color:#fff}.content{flex:1;padding:24px 28px;min-width:0}.page-header{margin-bottom:18px}.page-header h1{font-size:20px;margin:0 0 4px}.page-header p{margin:0;color:var(--text-muted);font-size:13px}.card{background:var(--surface);border:1px solid 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