*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--sidebar-width: 220px;--sidebar-collapsed-width: 56px;--color-bg: #f5f6fa;--color-surface: #ffffff;--color-primary: #4f46e5;--color-primary-light: #e0e7ff;--color-text: #1e293b;--color-text-muted: #64748b;--color-border: #e2e8f0;--color-danger: #ef4444;--color-success: #22c55e;--color-warning: #f59e0b;--radius: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .08)}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.5}.app-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);background:var(--color-surface);border-right:1px solid var(--color-border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100;transition:width .2s ease}.sidebar.collapsed{width:var(--sidebar-collapsed-width)}.sidebar.collapsed .nav-label,.sidebar.collapsed .sidebar-footer .user-label{display:none}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid var(--color-border)}.logo{font-size:18px;font-weight:700;color:var(--color-primary)}.sidebar-toggle{background:none;border:1px solid var(--color-border);border-radius:4px;cursor:pointer;padding:2px 6px;color:var(--color-text-muted);font-size:12px}.sidebar-nav{flex:1;overflow-y:auto;padding:8px}.nav-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:var(--radius);text-decoration:none;color:var(--color-text-muted);font-size:14px;font-weight:500;transition:background .15s,color .15s}.nav-item:hover{background:var(--color-bg);color:var(--color-text)}.nav-item.active{background:var(--color-primary-light);color:var(--color-primary)}.nav-icon{width:20px;text-align:center;flex-shrink:0;font-weight:700}.nav-divider{height:1px;background:var(--color-border);margin:8px 12px}.sidebar-footer{padding:12px 16px;border-top:1px solid var(--color-border);display:flex;align-items:center;justify-content:space-between;gap:8px}.user-label{font-size:12px;color:var(--color-text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.logout-btn{background:none;border:1px solid var(--color-border);border-radius:4px;padding:4px 10px;font-size:12px;cursor:pointer;color:var(--color-text-muted);flex-shrink:0}.logout-btn:hover{background:var(--color-danger);color:#fff;border-color:var(--color-danger)}.main-content{flex:1;margin-left:var(--sidebar-width);padding:24px;transition:margin-left .2s ease;min-width:0}.sidebar.collapsed~.main-content{margin-left:var(--sidebar-collapsed-width)}.bottom-nav{display:none}@media (max-width: 768px){.sidebar{display:none}.main-content{margin-left:0;padding:16px 16px 72px}.bottom-nav{display:flex;position:fixed;bottom:0;left:0;right:0;background:var(--color-surface);border-top:1px solid var(--color-border);z-index:100;justify-content:space-around;padding:8px 0}.bottom-nav-item{text-decoration:none;color:var(--color-text-muted);font-size:11px;font-weight:500;padding:6px 12px;border-radius:var(--radius)}.bottom-nav-item.active{color:var(--color-primary);background:var(--color-primary-light)}}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;flex-wrap:wrap;gap:12px}.page-title{font-size:24px;font-weight:700}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;margin-bottom:24px}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.chart-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:24px}.chart-card h3{font-size:16px;font-weight:600;margin-bottom:16px}