.topbar{position:sticky;top:0;z-index:100;height:60px;flex-shrink:0;background:var(--bg-secondary);border-bottom:1px solid var(--border-color);display:flex;align-items:center;padding:0 20px}.hamburger{background:0 0;border:none;color:var(--text-primary);font-size:20px;cursor:pointer;margin-right:20px;display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;transition:background .2s}.hamburger:hover{background:var(--hover-bg)}.system-notification{flex:1;width:100%;display:flex;justify-content:center}