.bottom-nav{position:fixed;bottom:calc(var(--shell-safe-bottom, env(safe-area-inset-bottom, 0px)) + 8px);left:12px;right:12px;height:58px;background-color:var(--background-color-card, #fff);border:1px solid var(--border-color-light, #e2e8f0);border-radius:24px;display:flex;align-items:center;justify-content:flex-start;gap:4px;box-shadow:0 6px 20px #0f172a1f;z-index:1500;overflow-x:auto;overflow-y:hidden;scroll-behavior:smooth;-webkit-overflow-scrolling:touch;padding:0 8px;scroll-snap-type:x proximity}.bottom-nav::-webkit-scrollbar{display:none}.bottom-nav{-ms-overflow-style:none;scrollbar-width:none}.bottom-nav-item{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:0 0 calc((100vw - 52px)/5);max-width:68px;min-width:52px;height:50px;gap:3px;color:var(--text-color-secondary, #64748b);text-decoration:none;font-size:10px;padding:2px 0;border-radius:12px;transition:transform .15s ease;box-sizing:border-box;scroll-snap-align:start;-webkit-tap-highlight-color:transparent;background:transparent}.bottom-nav-item i{display:flex;align-items:center;justify-content:center;width:44px;height:26px;border-radius:13px;font-size:18px;line-height:1;transition:background-color .2s cubic-bezier(.2,0,0,1),color .2s ease,transform .15s ease;color:var(--text-color-secondary, #64748b)}.bottom-nav-item span{line-height:1.1;font-size:10px;letter-spacing:.01em;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:58px;text-align:center;transition:color .2s ease,font-weight .2s ease}.bottom-nav-item.active{background-color:transparent;box-shadow:none}.bottom-nav-item.active i{background-color:var(--primary-color, #10b981);color:#fff;box-shadow:0 2px 6px #10b98159;transform:scale(1.02)}.bottom-nav-item.active span{color:var(--primary-color, 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cubic-bezier(.16,1,.3,1);z-index:1001;flex-shrink:0}#app-sidebar:empty:before{content:"";display:block;margin:16px;height:calc(100% - 32px);border-radius:18px;background:linear-gradient(var(--background-color-hover) 0 0) 0 0/70% 16px no-repeat,linear-gradient(var(--background-color-hover) 0 0) 0 28px/45% 10px no-repeat,linear-gradient(var(--background-color-hover) 0 0) 0 72px/100% 12px no-repeat,linear-gradient(var(--background-color-hover) 0 0) 0 102px/88% 12px no-repeat,linear-gradient(var(--background-color-hover) 0 0) 0 132px/95% 12px no-repeat,linear-gradient(var(--background-color-hover) 0 0) 0 162px/82% 12px no-repeat,linear-gradient(var(--background-color-hover) 0 0) 0 192px/90% 12px no-repeat,linear-gradient(var(--background-color-hover) 0 0) 0 222px/80% 12px no-repeat,linear-gradient(var(--background-color-hover) 0 0) 0 252px/75% 12px no-repeat;position:relative;overflow:hidden}#app-sidebar:empty{position:relative}#app-sidebar:empty:after{content:"";position:absolute;top:16px;right:16px;bottom:16px;left:16px;border-radius:18px;background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.55) 50%,transparent 100%);animation:skeletonShimmer 1.4s ease-in-out infinite;pointer-events:none}.sidebar-header{display:flex;align-items:center;gap:15px;margin-bottom:20px;padding:0 20px;height:60px;border-bottom:1px solid var(--border-color-light);flex-shrink:0}.sidebar-header img{height:42px;width:42px;object-fit:contain;border-radius:10px;background:#00000008;padding:3px;border:1px solid var(--border-color-light)}.sidebar-header .school-info{font-weight:600;transition:opacity .2s ease,visibility .2s ease;white-space:nowrap;overflow:hidden}.sidebar-header .school-info #sidebar-title{font-family:"Plus Jakarta Sans",var(--font-family-main);font-size:1.05rem;font-weight:800;letter-spacing:-.01em;color:var(--primary-color, 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.module-disabled-icon{width:60px;height:60px;border-radius:50%;background:#ef44441f;color:var(--danger-color);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:28px}#module-disabled-overlay h2{margin:0 0 10px;font-size:1.4rem}#module-disabled-overlay p{margin:0 0 8px;color:var(--text-color-secondary)}#module-disabled-overlay .module-disabled-note{font-size:.9rem}.main-content-wrapper{flex-grow:1;display:flex;flex-direction:column;height:100vh;min-width:0}body.public-view{display:block;height:auto;min-height:100vh;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch}body.guest-mode{--sidebar-width: 0px !important}body.guest-mode .sidebar,body.guest-mode #app-sidebar,body.public-view .sidebar,body.public-view #app-sidebar{display:none!important;width:0!important;min-width:0!important;max-width:0!important;margin:0!important;padding:0!important;border:none!important;pointer-events:none!important}body.guest-mode 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ease-in-out}.notification-badge.show{transform:scale(1)}.notification-modal-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background-color:transparent;z-index:1000}.notification-modal-overlay.active{display:block}#notification-modal{position:absolute;top:65px;right:20px;width:360px;max-width:90vw;background-color:var(--background-color-card);border-radius:var(--border-radius-md);box-shadow:var(--shadow-lg);border:1px solid var(--border-color-light);z-index:1011;display:flex;flex-direction:column;max-height:450px;animation:fadeInDropdown .2s ease-out}@keyframes fadeInDropdown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.notification-modal-header{padding:12px 15px;font-weight:600;border-bottom:1px solid 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a{color:var(--primary-color);font-weight:500;text-decoration:none}.empty-notifications{padding:30px;text-align:center;color:var(--text-color-secondary)}.empty-notifications i{font-size:2rem;margin-bottom:10px;display:block}.loader-container{display:flex;justify-content:center;padding:20px}.dropdown-theme-controls{padding:10px 12px;display:flex;flex-direction:column;gap:8px;width:100%;box-sizing:border-box}.theme-control-header{font-size:.74rem;font-weight:700;color:var(--text-color-secondary);display:flex;align-items:center;gap:6px;text-transform:uppercase;letter-spacing:.05em}.theme-control-header i{color:var(--primary-color)}.theme-buttons{display:grid;grid-template-columns:1fr 1fr;gap:6px;width:100%;box-sizing:border-box}.theme-choice-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:7px 8px;border:1px solid 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.theme-choice-dot{color:#fff!important;opacity:1;transform:scale(1.2)}html.dark .theme-choice-btn[data-theme=default] .theme-choice-dot{color:#34d399}html.dark .theme-choice-btn[data-theme=modern] .theme-choice-dot{color:#60a5fa}html.dark .theme-choice-btn[data-theme=playful] .theme-choice-dot{color:#2dd4bf}html.dark .theme-choice-btn[data-theme=neo-class] .theme-choice-dot{color:#cbd5e1}.dark-mode-control{display:flex;align-items:center;justify-content:space-between;padding-top:8px;border-top:1px solid var(--border-color-light);width:100%;box-sizing:border-box;margin-top:4px}.dark-mode-label{display:inline-flex;align-items:center;gap:6px;font-size:.8rem;font-weight:600;color:var(--text-color-secondary)}.dropdown-footer-actions{padding:4px 8px 8px;display:flex;flex-direction:column;gap:4px}.btn-footer-cache{font-size:.84rem;color:var(--text-color-secondary)!important}.btn-footer-cache:hover{color:var(--text-color-primary)!important}.user-menu-dropdown 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769px){#top-bar-search-btn{display:none!important}}.pwa-install-popup{position:fixed;left:12px;right:12px;bottom:calc(var(--shell-bottom-nav-height, 60px) + var(--shell-safe-bottom, env(safe-area-inset-bottom, 0px)) + 10px);z-index:1560;display:flex;gap:12px;align-items:flex-start;padding:14px;border-radius:16px;border:1px solid rgba(59,130,246,.22);background:linear-gradient(135deg,#eff6fffa,#fffffffa);box-shadow:0 12px 28px #0f172a33;animation:installPopupEnter .24s ease-out}.pwa-install-popup.closing{animation:installPopupExit .18s ease-in forwards}.pwa-install-popup__icon{width:34px;height:34px;border-radius:10px;background:#2563eb24;color:#1d4ed8;display:flex;align-items:center;justify-content:center;flex-shrink:0}.pwa-install-popup__content{flex:1;min-width:0}.pwa-install-popup__title{margin:0 0 4px;font-size:.98rem;line-height:1.25;color:#0f172a}.pwa-install-popup__desc{margin:0;font-size:.84rem;line-height:1.4;color:#334155}.pwa-install-popup__actions{margin-top:10px;display:flex;gap:8px}.pwa-install-popup__btn{border:none;border-radius:10px;padding:8px 12px;font-size:.82rem;font-weight:600;cursor:pointer}.pwa-install-popup__btn--primary{background:#2563eb;color:#fff}.pwa-install-popup__btn--ghost{background:#0f172a14;color:#0f172a}.fullscreen-fallback-chip{position:fixed;right:12px;bottom:calc(var(--shell-bottom-nav-height, 60px) + var(--shell-safe-bottom, env(safe-area-inset-bottom, 0px)) + 90px);z-index:1550;border:none;border-radius:999px;padding:9px 13px;display:inline-flex;align-items:center;gap:6px;background:#0f172aeb;color:#fff;box-shadow:0 8px 20px #0f172a59;font-size:.8rem;font-weight:600;animation:installPopupEnter .2s ease-out}.fullscreen-fallback-chip:disabled{opacity:.7}@keyframes 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