:root{color-scheme:light;--bg: #f4f6f8;--panel: #ffffff;--border: #dfe3e8;--text: #1f2933;--text-muted: #647184;--primary: #1f4b99;--primary-dark: #163a78;--danger: #b3261e;--success: #1e7a34;--warning: #a15c00;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}a{color:var(--primary)}.app-shell{display:flex;min-height:100vh}.sidebar{width:240px;background:#0f1f38;color:#e5ecf6;flex-shrink:0;display:flex;flex-direction:column;padding:16px 0}.sidebar h1{font-size:16px;padding:0 20px 16px;margin:0;border-bottom:1px solid rgba(255,255,255,.1)}.sidebar nav{display:flex;flex-direction:column;margin-top:12px}.sidebar nav a{color:#cdd9ec;text-decoration:none;padding:10px 20px;font-size:14px}.sidebar nav a.active,.sidebar nav a:hover{background:#ffffff14;color:#fff}.sidebar .user-box{margin-top:auto;padding:16px 20px;border-top:1px solid 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