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36px;color:var(--muted);font-size:12px;padding:7px 9px;border-left:2px solid var(--border)}@media(max-width:760px){.tree-node{margin-left:calc(var(--tree-depth) * 12px)}.tree-group-head{grid-template-columns:auto auto minmax(0,1fr)}.tree-group-actions{grid-column:1 / -1;justify-content:flex-start;padding-left:56px}.tree-progress{grid-template-columns:1fr;gap:5px}.tree-progress-text{text-align:right}}@media(max-width:640px){.course-overview{grid-template-columns:1fr}.course-plan-head{flex-direction:column}.course-plan-meta{white-space:normal}.lesson-actions{opacity:1}}.floating-panel{position:fixed;top:18px;right:18px;z-index:99}.setting-ball{width:46px;height:46px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;gap:4px;box-shadow:0 12px 30px #0003;border:none;padding:0;cursor:pointer}.setting-dot{width:4px;height:4px;border-radius:50%;background:#fff;display:block;flex:0 0 auto}.chart-box{width:100%;height:320px;position:relative}.period-dashboard{border:1px solid var(--border);border-radius:18px;overflow:hidden;background:color-mix(in srgb,var(--card) 94%,var(--bg))}.period-hero{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;padding:18px 20px;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--primary) 7%,var(--card))}.period-hero-title{margin:0;color:var(--primary);font-size:21px;font-weight:800;line-height:1.2}.period-hero-range{margin-top:6px;color:var(--text-soft);font-size:12px}.period-kpis{display:flex;align-items:center;justify-content:flex-end;gap:22px;flex-wrap:wrap}.period-kpi{display:flex;align-items:baseline;gap:6px;color:var(--text-soft);font-size:12px;white-space:nowrap}.period-kpi 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strong{font-size:18px}.period-visual-grid{padding:10px}.period-detail-section{margin:0 10px 10px;padding:12px}.module-card-grid{grid-template-columns:1fr 1fr;gap:8px}.module-stat-card{padding:10px}}@media(max-width:768px){.chart-box{height:260px}.card{padding:18px}}#tab-course .course-tree{gap:8px}#tab-course .tree-node{margin-left:calc(var(--tree-depth) * 18px)}#tab-course .tree-group-card{padding:10px 12px;border-radius:11px;box-shadow:none}#tab-course .tree-group-head{grid-template-columns:auto minmax(0,1fr) auto;gap:8px}#tab-course .tree-group-main{min-width:0}#tab-course .tree-group-title{font-size:15px;font-weight:700}#tab-course .tree-group-sub,#tab-course .tree-check{display:none}#tab-course .tree-toggle{width:25px;height:25px;border:0;background:transparent;padding:0}#tab-course .tree-progress{margin-top:7px;grid-template-columns:minmax(0,1fr) auto;gap:8px}#tab-course .tree-progress .progress-bar{height:6px}#tab-course .tree-progress-text{font-size:11px}#tab-course .tree-children{gap:5px;margin-top:6px}#tab-course .tree-lesson-row{min-height:36px;padding:7px 10px;border-radius:9px;grid-template-columns:auto minmax(0,1fr) auto}#tab-course .tree-lesson-row .tree-check{display:block}#tab-course .tree-group-actions{display:block;padding:0}.simple-tree-menu{position:relative}.simple-tree-menu>summary{list-style:none;cursor:pointer;width:28px;height:28px;border:1px solid var(--border);border-radius:8px;display:inline-flex;align-items:center;justify-content:center;color:var(--text-soft);background:var(--card);font-size:17px;-webkit-user-select:none;user-select:none}.simple-tree-menu>summary::-webkit-details-marker{display:none}.simple-tree-menu[open]>summary{background:color-mix(in srgb,var(--primary) 10%,var(--card));color:var(--primary)}.simple-tree-menu-list{position:absolute;z-index:50;right:0;top:34px;width:132px;padding:5px;background:var(--card);border:1px solid var(--border);border-radius:10px;box-shadow:0 8px 22px 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