::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#0f172a80;border-radius:8px}::-webkit-scrollbar-thumb{background:#334155;border-radius:8px}::-webkit-scrollbar-thumb:hover{background:#475569}.app-header{display:flex;justify-content:space-between;align-items:center;padding:1.2rem 2rem;background-color:#1e293b;border-bottom:1px solid #334155;position:sticky;top:0;z-index:50}.nav-group{display:flex;gap:15px;align-items:center}.user-group{display:flex;align-items:center;gap:15px}.nav-item-container{position:relative}.nav-btn{background:transparent;color:#f8fafc;border:none;padding:8px 12px;border-radius:6px;cursor:pointer;font-weight:700;font-size:.95rem;display:flex;align-items:center;justify-content:space-between;gap:5px;transition:background .2s}.nav-btn.active{background:#334155}.dropdown-menu{position:absolute;top:100%;left:0;margin-top:10px;background:#1e293b;border:1px solid #334155;border-radius:8px;overflow:hidden;box-shadow:0 10px 25px -5px #00000080;min-width:240px;display:flex;flex-direction:column;z-index:100}.drop-item{background:transparent;color:#cbd5e1;border:none;padding:12px 15px;text-align:left;cursor:pointer;width:100%;border-bottom:1px solid #334155;font-size:.95rem;transition:background .2s}.drop-item:hover{background:#334155;color:#fff!important}.drop-item:last-child{border-bottom:none}.drop-item.active{color:#38bdf8;font-weight:700}@media (max-width: 768px){.app-header{flex-direction:column;align-items:stretch!important;padding:1rem}.nav-group{flex-direction:column;align-items:stretch!important;width:100%;gap:10px}.user-group{width:100%;justify-content:space-between;padding-top:15px;margin-top:10px;border-top:1px solid #334155}.nav-item-container{width:100%}.nav-btn{width:100%;padding:12px 15px!important;background-color:#1e293bcc;border:1px solid #334155}.dropdown-menu{position:relative!important;width:100%!important;margin-top:5px!important;box-shadow:none!important;border:1px solid #38bdf850!important}}.mobile-header-top{display:none}.hamburger-btn{background:none;border:none;color:#fff;font-size:1.8rem;cursor:pointer;padding:0;display:flex;align-items:center;justify-content:center}.header-nav-container{display:flex;flex:1;justify-content:space-between;align-items:center}@media (max-width: 768px){.app-header{flex-direction:column;align-items:stretch;padding:15px}.mobile-header-top{display:flex;justify-content:space-between;align-items:center;width:100%}.header-nav-container{display:none;flex-direction:column;width:100%;margin-top:15px;gap:15px;align-items:stretch}.header-nav-container.mobile-open{display:flex}.nav-group{flex-direction:column;align-items:stretch;gap:10px}.user-group{justify-content:space-between;padding-top:15px;border-top:1px solid #334155;margin-top:10px}.dropdown-menu{position:static;box-shadow:none;border-left:2px solid #38bdf8;padding-left:10px;margin-top:5px;background:transparent}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}