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var(--c-border);scrollbar-width:none;-ms-overflow-style:none;flex-direction:column;flex-shrink:0;width:270px;min-width:270px;height:100vh;transition:width .22s cubic-bezier(.4,0,.2,1),min-width .22s cubic-bezier(.4,0,.2,1);display:flex;overflow-y:auto}.course-sidebar::-webkit-scrollbar{display:none}.course-sidebar.collapsed{width:64px;min-width:64px}@media (max-width:1024px){.course-sidebar{border-right:none;border-bottom:1px solid var(--c-border);width:100%;min-width:100%;height:auto}.course-sidebar.collapsed{width:100%;min-width:100%}}.sidebar-header{border-bottom:1px solid var(--c-border);justify-content:space-between;align-items:center;gap:12px;min-height:57px;padding:16px 18px;display:flex}.course-sidebar.collapsed .sidebar-header{justify-content:center;padding:16px 10px}.sidebar-back-link{color:var(--c-text-main);white-space:nowrap;text-overflow:ellipsis;flex:1;align-items:center;gap:10px;font-size:14px;font-weight:600;text-decoration:none;display:flex;overflow:hidden}.sidebar-course-title{white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.sidebar-back-link:hover{color:var(--c-primary)}.sidebar-back-icon{flex-shrink:0;width:16px;height:16px}.sidebar-collapse-btn{color:var(--c-text-muted);cursor:pointer;background:0 0;border:none;border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;padding:6px;transition:all .15s;display:flex}.sidebar-collapse-btn:hover{background:var(--c-border-light);color:var(--c-text-main)}.sidebar-nav{scrollbar-width:none;-ms-overflow-style:none;flex-direction:column;gap:14px;padding:16px 18px;display:flex;overflow-y:auto}.course-sidebar.collapsed .sidebar-nav{align-items:center;padding:16px 10px}.sidebar-nav::-webkit-scrollbar{display:none}.sidebar-group{width:100%}.sidebar-group-title{width:100%;color:var(--c-text-main);cursor:pointer;-webkit-user-select:none;user-select:none;text-align:left;border-radius:6px;justify-content:space-between;align-items:center;padding:8px 0;font-size:13.5px;font-weight:600;transition:background .15s,color .15s;display:flex}.course-sidebar.collapsed .sidebar-group-title{justify-content:center;width:44px;height:44px;padding:10px}.sidebar-group-title:hover{background:var(--c-border-light);color:var(--c-primary)}.sidebar-group-title .group-label{align-items:center;gap:10px;display:flex}.sidebar-group-title .group-icon{flex-shrink:0;width:16px;height:16px}.sidebar-group-title .chevron-icon{width:14px;height:14px;color:var(--c-text-muted);flex-shrink:0;transition:transform .2s}.sidebar-items-list{flex-direction:column;gap:2px;width:100%;margin-top:4px;padding:0;list-style:none;display:flex}.sidebar-item-btn{width:100%;color:var(--c-text-muted);cursor:pointer;text-align:left;background:0 0;border:none;border-radius:6px;justify-content:flex-start;align-items:center;padding:8px 12px;font-size:13px;font-weight:500;transition:all .15s;display:flex}.sidebar-item-btn:hover{background:var(--c-border-light);color:var(--c-text-main)}.sidebar-item-btn.active{color:#0e8f80;background:#2dd4bf1a;font-weight:600;position:relative}.sidebar-item-btn.active:before{content:"";background:var(--c-cyan);border-radius:2px;width:3px;position:absolute;top:6px;bottom:6px;left:4px}.course-main-content{flex-direction:column;flex:1;gap:24px;height:100vh;padding:32px 48px 80px;display:flex;overflow-y:auto}@media (max-width:1024px){.course-main-content{gap:20px;height:auto;padding:20px 16px 40px;overflow-y:visible}}.outline-topbar{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.outline-title-wrap h1{color:var(--c-text-main);font-size:22px;font-weight:700;font-family:var(--c-font-display);align-items:center;gap:8px;margin:0 0 6px;display:flex}.learn-more-tag{color:var(--c-text-muted);cursor:pointer;font-size:12.5px;font-weight:500;text-decoration:none}.learn-more-tag:hover{color:var(--c-primary)}.outline-subtitle{color:var(--c-text-muted);margin:0;font-size:13.5px}.outline-actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.btn-outline-action{border:1px solid var(--c-border);color:var(--c-text-main);cursor:pointer;background:#fff;border-radius:8px;align-items:center;gap:6px;padding:8px 16px;font-size:13px;font-weight:600;transition:all 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#fff9;border-radius:999px;align-items:center;gap:6px;padding:6px 14px;font-size:12px;font-weight:600;transition:background .15s;display:flex;position:absolute;top:14px;right:14px;box-shadow:0 2px 8px #0000001a}.change-cover-badge:hover{background:#fff}.banner-inset-avatar{background:#fff;border:4px solid #fff;border-radius:50%;justify-content:center;align-items:center;width:72px;height:72px;display:flex;position:absolute;bottom:-20px;left:20px;overflow:hidden;box-shadow:0 4px 12px #0000001f}.banner-inset-avatar img{object-fit:cover;width:100%;height:100%}.course-info-meta-section{border-bottom:1px dashed var(--c-border);flex-direction:column;gap:16px;width:100%;padding-bottom:20px;display:flex}.course-heading-title{color:var(--c-text-main);font-size:24px;font-weight:700;font-family:var(--c-font-display);margin:0;line-height:1.35}.meta-stats-and-instructor-row{flex-wrap:wrap;align-items:center;gap:16px;display:flex}.meta-stats-row{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.meta-stat-pill,.instructor-badge-right{border:1px solid var(--c-border);box-sizing:border-box;background:#f8fafc;border-radius:10px;align-items:center;gap:12px;height:52px;padding:0 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img{object-fit:cover;width:100%;height:100%}.instructor-text{flex-direction:column;justify-content:center;gap:2px;display:flex}.instructor-name-label{color:var(--c-text-main);font-size:13px;font-weight:600;line-height:1.2}.instructor-email-label{color:var(--c-text-muted);font-size:11.5px;line-height:1}.modules-accordion-list{flex-direction:column;gap:14px;display:flex}.module-card{border:1px solid var(--c-border);background:#fff;border-radius:12px;transition:border-color .18s,box-shadow .18s;overflow:hidden}.module-card:hover{border-color:#cbd5e1}.module-header{cursor:pointer;-webkit-user-select:none;user-select:none;background:#fff;justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.module-header-left{align-items:center;gap:12px;display:flex}.module-toggle-chevron{width:16px;height:16px;color:var(--c-text-muted);transition:transform 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svg{width:15px;height:15px;color:var(--c-text-muted)}.hide-info-toggle{color:var(--c-primary);cursor:pointer;background:0 0;border:none;align-items:center;gap:4px;padding:0;font-size:12.5px;font-weight:600;display:inline-flex}.hide-info-toggle:hover{text-decoration:underline}.module-actions-row{flex-wrap:wrap;align-items:center;gap:10px;padding-top:6px;display:flex}.btn-add-activity{background:var(--c-text-main);color:#fff;cursor:pointer;border:none;border-radius:8px;align-items:center;gap:6px;padding:8px 16px;font-size:13px;font-weight:600;display:inline-flex}.btn-add-activity:hover{background:#1f2a37}.btn-module-action-outline{color:var(--c-text-main);border:1px solid var(--c-border);cursor:pointer;background:#fff;border-radius:8px;align-items:center;gap:6px;padding:8px 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