.ClassroomHeader_header__sZ_8T{position:-webkit-sticky;position:sticky;top:0;z-index:100;justify-content:space-between;height:64px;padding:0 var(--r4e-space-lg);background:#0f172a;border-bottom:1px solid rgba(255,255,255,.08)}.ClassroomHeader_header__sZ_8T,.ClassroomHeader_left__eBRHr{display:flex;align-items:center;gap:var(--r4e-space-md)}.ClassroomHeader_menuBtn___rJBj{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;background:transparent;color:rgba(255,255,255,.7);border-radius:var(--r4e-radius-md);cursor:pointer;transition:background .2s,color .2s}.ClassroomHeader_menuBtn___rJBj:hover{background:rgba(255,255,255,.1);color:white}@media (min-width:1024px){.ClassroomHeader_menuBtn___rJBj{display:none}}.ClassroomHeader_logo__W57xv{display:flex;align-items:center;gap:var(--r4e-space-sm);text-decoration:none;color:white}.ClassroomHeader_logoText__l_chq{font-size:var(--r4e-text-base);font-weight:700;letter-spacing:-.02em}@media (max-width:639px){.ClassroomHeader_logoText__l_chq{display:none}}.ClassroomHeader_right__2OiFC{display:flex;align-items:center;gap:var(--r4e-space-md)}.ClassroomHeader_progressBadge__5KZS4{display:flex;align-items:center;gap:8px;padding:6px 12px;background:rgba(255,255,255,.08);border-radius:var(--r4e-radius-full)}.ClassroomHeader_progressBar__YVp8E{width:60px;height:6px;background:rgba(255,255,255,.15);border-radius:var(--r4e-radius-full);overflow:hidden}.ClassroomHeader_progressFill__ZABIk{height:100%;background:linear-gradient(90deg,var(--r4e-green-400),var(--r4e-green-500));border-radius:var(--r4e-radius-full);transition:width .5s ease}.ClassroomHeader_progressLabel__ZoPBg{font-size:var(--r4e-text-xs);font-weight:600;color:var(--r4e-green-400)}@media (max-width:639px){.ClassroomHeader_progressBadge__5KZS4{display:none}}.ClassroomHeader_playgroundLink__1Ok8E{display:flex;align-items:center;gap:6px;padding:6px 14px;font-size:var(--r4e-text-sm);font-weight:600;color:white;background:linear-gradient(135deg,var(--r4e-purple-600),var(--r4e-blue-600));border-radius:var(--r4e-radius-full);text-decoration:none;transition:opacity .2s}.ClassroomHeader_playgroundLink__1Ok8E:hover{opacity:.9}.ClassroomHeader_playgroundText__NLMSN{display:none}@media (min-width:640px){.ClassroomHeader_playgroundText__NLMSN{display:inline}}.ClassroomHeader_backLink__tKqAh{display:flex;align-items:center;gap:4px;padding:6px 10px;font-size:var(--r4e-text-xs);color:rgba(255,255,255,.5);text-decoration:none;border-radius:var(--r4e-radius-md);transition:color .2s}.ClassroomHeader_backLink__tKqAh:hover{color:rgba(255,255,255,.8)}.ClassroomHeader_backText__DgFr9{display:none}@media (min-width:768px){.ClassroomHeader_backText__DgFr9{display:inline}}.ClassroomSidebar_backdrop__84PAy{display:none;position:fixed;inset:0;z-index:90;background:rgba(0,0,0,.5)}@media (max-width:1023px){.ClassroomSidebar_backdrop__84PAy{display:block}}.ClassroomSidebar_sidebar__EQxVB{position:fixed;top:64px;left:0;bottom:0;z-index:95;width:280px;background:#0f172a;border-right:1px solid rgba(255,255,255,.06);overflow-y:auto;transition:transform .3s ease}@media (max-width:1023px){.ClassroomSidebar_sidebar__EQxVB{transform:translateX(-100%)}.ClassroomSidebar_sidebar__EQxVB.ClassroomSidebar_open__NJJ7v{transform:translateX(0)}}.ClassroomSidebar_nav__9Xh4G{padding:var(--r4e-space-md) 0}.ClassroomSidebar_sectionLabel__jcFkI{padding:var(--r4e-space-xs) var(--r4e-space-lg);margin:0 0 var(--r4e-space-xs);font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:rgba(255,255,255,.35)}.ClassroomSidebar_moduleList__LMKbH{list-style:none;margin:0;padding:0}.ClassroomSidebar_moduleItem__CaH6e{display:flex;align-items:center;gap:var(--r4e-space-sm);padding:10px var(--r4e-space-lg);text-decoration:none;color:rgba(255,255,255,.7);transition:background .2s,color .2s;border-left:3px solid transparent}.ClassroomSidebar_moduleItem__CaH6e:hover{background:rgba(255,255,255,.05);color:white}.ClassroomSidebar_moduleItem__CaH6e.ClassroomSidebar_active__P28B4{background:rgba(147,51,234,.15);color:white;border-left-color:var(--r4e-purple-500)}.ClassroomSidebar_moduleItem__CaH6e.ClassroomSidebar_complete___HMJf{color:var(--r4e-green-400)}.ClassroomSidebar_moduleLocked__CnEoI{display:flex;align-items:center;gap:var(--r4e-space-sm);padding:10px var(--r4e-space-lg);color:rgba(255,255,255,.25);border-left:3px solid transparent;cursor:not-allowed}.ClassroomSidebar_moduleNumber___8fC0{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;border:2px solid rgba(255,255,255,.2);font-size:11px;font-weight:700}.ClassroomSidebar_complete___HMJf .ClassroomSidebar_moduleNumber___8fC0{border-color:var(--r4e-green-500);color:var(--r4e-green-400);background:rgba(34,197,94,.1)}.ClassroomSidebar_moduleLocked__CnEoI .ClassroomSidebar_moduleNumber___8fC0{border-color:rgba(255,255,255,.1)}.ClassroomSidebar_moduleInfo__OcHzN{flex:1 1;min-width:0;display:flex;flex-direction:column;gap:2px}.ClassroomSidebar_moduleTitle__qPoY5{font-size:var(--r4e-text-sm);font-weight:500;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.ClassroomSidebar_moduleProgress__kaBs3{font-size:10px;font-weight:500;color:var(--r4e-purple-400)}.ClassroomSidebar_divider__x_GRz{height:1px;margin:var(--r4e-space-md) var(--r4e-space-lg);background:rgba(255,255,255,.08)}.ClassroomSidebar_playgroundItem__0Hgwx{display:flex;align-items:center;gap:var(--r4e-space-sm);padding:10px var(--r4e-space-lg);text-decoration:none;color:rgba(255,255,255,.7);font-size:var(--r4e-text-sm);font-weight:600;border-left:3px solid transparent;transition:background .2s,color .2s}.ClassroomSidebar_playgroundItem__0Hgwx:hover{background:rgba(255,255,255,.05);color:white}.ClassroomSidebar_playgroundItem__0Hgwx.ClassroomSidebar_active__P28B4{background:rgba(147,51,234,.15);color:white;border-left-color:var(--r4e-purple-500)}.ClassroomLayout_layout__3c6GX{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;background:#f8fafc}.ClassroomLayout_body__KHPvO{flex:1 1;display:flex;position:relative}.ClassroomLayout_main__klblU{flex:1 1;margin-left:0;min-width:0;overflow-x:hidden}@media (min-width:1024px){.ClassroomLayout_main__klblU{margin-left:280px}}