.app-grid{display:grid;grid-template-columns:200px 1fr;height:100vh;overflow:hidden}
.sidebar{background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;align-items:center;padding:0;position:sticky;top:0;height:100vh;overflow:hidden}
.main{display:flex;flex-direction:column;height:100%;overflow:hidden}
.topbar{height:64px;flex:0 0 64px;display:flex;align-items:center;gap:16px;padding:0 24px;background:var(--panel);border-bottom:1px solid var(--line)}
.topbar-left{ display:flex; flex-direction:column; }
.topbar-greeting{ font-size:16px; font-weight:600; color:var(--ink); }
.topbar-date{ font-size:12px; color:var(--muted); }
.topbar-spacer{ flex:1; }
.topbar-date-picker{ display:flex; align-items:center; gap:6px; border:1px solid var(--line); border-radius:8px; padding:2px; background:var(--panel); }
.topbar-date-picker .date-arrow{ padding:4px 8px; font-size:18px; color:var(--muted); border-radius:6px; }
.topbar-date-picker .date-arrow:hover{ background:var(--brand-soft); }
.topbar-date-picker input[type="date"]{ border:none; padding:4px 8px; width:130px; font-size:13px; background:transparent; }
.topbar-date-picker .today-btn{ font-size:13px; padding:4px 10px; color:var(--brand-deep); font-weight:500; }
.view{padding:20px;flex:1;overflow:auto;min-width:0}

/* 所有页面容器统一宽度并居中，避免切换页面时内容宽度跳动 */
.view > div{max-width:1200px;margin:0 auto}

/* 侧边栏 */
.brand{font-weight:700;color:var(--brand-deep);font-size:17px;margin-bottom:24px;padding-top:16px;letter-spacing:.5px}
.nav-list{width:100%;padding:0 12px;flex:1;overflow-y:auto}
.nav-list a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:var(--ink);text-decoration:none;margin-bottom:6px;transition:background .15s;font-size:14px;cursor:pointer;user-select:none}
.nav-list a:hover{background:var(--brand-soft)}
.nav-list a.active{background:var(--brand);color:#fff}
.nav-list a .icon{width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center}
.nav-list a svg{fill:currentColor;width:18px;height:18px}

/* 侧边栏二级菜单分组（系统设置） */
.nav-group-wrap{margin-bottom:6px}
.nav-list a.nav-group{margin-bottom:0;font-weight:500}
.nav-group{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:var(--ink);font-size:14px;cursor:pointer;user-select:none}
.nav-group:hover{background:var(--brand-soft)}
.nav-group .caret{margin-left:auto;font-size:12px;transition:transform .2s;color:var(--muted)}
.nav-group-wrap.open .nav-group .caret{transform:rotate(180deg)}
.nav-sub{display:none;margin:2px 0 4px;padding-left:12px}
.nav-group-wrap.open .nav-sub{display:block}
.nav-sub .nav-item{padding:8px 12px;font-size:13px;margin-bottom:2px;border-radius:10px}
.nav-sub .nav-item .icon{width:18px;height:18px}
.nav-sub .nav-item svg{width:15px;height:15px}
.sidebar-footer{margin-top:auto;padding:0 12px 16px;width:100%}
.user-card{display:flex;align-items:center;gap:10px;padding:10px;border-radius:10px;background:var(--brand-soft)}
.user-avatar{width:32px;height:32px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600}
.user-name{font-weight:600;font-size:13px}
.user-role{font-size:11px;color:var(--muted)}
.user-info{flex:1;min-width:0}
.user-actions{display:flex;gap:8px;margin-top:8px}
.user-actions .btn{flex:1;padding:8px 4px;font-size:12px;border-radius:8px;background:#fff;border:1px solid var(--line);color:var(--ink)}
.user-actions .btn:hover{background:var(--brand-soft)}

/* 汉堡按钮（移动端开合侧边栏） */
.btn.menu{font-size:18px;line-height:1;padding:6px 10px}
.btn.menu:hover{ background:var(--brand-soft); }

/* 移动端抽屉遮罩：点击遮罩关闭导航 */
.sidebar-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.35);opacity:0;visibility:hidden;transition:opacity .2s;z-index:39;pointer-events:none}

/* 桌面端隐藏汉堡按钮与遮罩 */
@media(min-width:821px){
  .btn.menu{display:none}
  .sidebar-backdrop{display:none}
}

@media(max-width:820px){
  .app-grid{grid-template-columns:1fr}
  .sidebar{position:fixed;inset:0 auto 0 0;width:240px;max-width:82vw;transform:translateX(-100%);transition:transform .2s;z-index:40;overflow-y:auto;box-shadow:2px 0 12px rgba(0,0,0,.12)}
  .sidebar.open{transform:none}
  /* 抽屉展开时显示遮罩，点击遮罩或选择栏目后自动收起 */
  .sidebar.open ~ .sidebar-backdrop{opacity:1;visibility:visible;pointer-events:auto}
}