:root{--bg-main: #0f172a;--bg-card: #131b2e;--border-main: #222f47;--text-title: #f8fafc;--text-body: #94a3b8;--text-muted: #475569;--hover-overlay: rgba(255, 255, 255, .04)}:root.light-mode{--bg-main: #f8fafc;--bg-card: #ffffff;--border-main: #e2e8f0;--text-title: #0f172a;--text-body: #475569;--text-muted: #94a3b8;--hover-overlay: rgba(15, 23, 42, .04)}body{background-color:var(--bg-main)!important;color:var(--text-title);transition:background-color .2s ease,border-color .2s ease,color .2s ease}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-main)}::-webkit-scrollbar-thumb{background:var(--border-main);border-radius:8px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.app-header{display:flex;justify-content:space-between;align-items:center;padding:0 2rem;background-color:var(--bg-card);border-bottom:1px solid var(--border-main);position:sticky;top:0;z-index:50;height:56px;box-sizing:border-box}.nav-group{display:flex;gap:4px;align-items:center}.user-group{display:flex;align-items:center;gap:12px}.nav-item-container{position:relative}.nav-btn{background:transparent;color:var(--text-body);border:none;padding:8px 12px;border-radius:4px;cursor:pointer;font-weight:600;font-size:.88rem;display:flex;align-items:center;gap:6px;white-space:nowrap;transition:all .15s ease-in-out}.nav-btn.active,.nav-btn:hover{background:var(--hover-overlay);color:var(--text-title)}.dropdown-menu{position:absolute;top:100%;left:0;margin-top:4px;background:var(--bg-card);border:1px solid var(--border-main);border-radius:6px;padding:4px;box-shadow:0 10px 25px -5px #0003;min-width:190px;display:flex;flex-direction:column;z-index:100}.drop-item{background:transparent;color:var(--text-body);border:none;padding:8px 12px;text-align:left;cursor:pointer;width:100%;font-size:.85rem;font-weight:600;border-radius:4px;transition:all .1s;display:flex;align-items:center;gap:8px}.drop-item:hover,.drop-item.active{background:var(--hover-overlay);color:var(--text-title)!important}.drop-item.active{color:#38bdf8!important}.mobile-header-top{display:none}.hamburger-btn{background:none;border:none;color:var(--text-title);cursor:pointer;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: 1059px){.app-header{flex-direction:column;align-items:stretch;padding:0;height:auto}.mobile-header-top{display:flex;justify-content:space-between;align-items:center;width:100%;padding:0 20px;box-sizing:border-box;height:56px;background:var(--bg-card)}.header-nav-container{display:none;flex-direction:column;width:100%;padding:16px 20px;box-sizing:border-box;gap:12px;background:var(--bg-card);border-top:1px solid var(--border-main)}.header-nav-container.mobile-open{display:flex}.nav-group{flex-direction:column;align-items:stretch;gap:6px;width:100%}.nav-btn{width:100%;background:var(--bg-main)!important;border:1px solid var(--border-main)!important;padding:10px 14px!important;border-radius:6px}.user-group{flex-direction:column;align-items:stretch;width:100%;gap:10px;padding-top:14px;margin-top:4px;border-top:1px solid var(--border-main)}.dropdown-menu{position:static!important;width:100%!important;box-shadow:none!important;background:var(--bg-main)!important;margin-top:4px!important;padding:6px!important;box-sizing:border-box;border:1px solid var(--border-main)!important}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}