.tool-chrome{display:flex;flex:1;min-height:0}.tool-sidebar{flex-shrink:0;background:var(--page,#fbfbf9);border-right:1px solid #e2e4e8;display:flex;flex-direction:column;position:sticky;top:var(--chrome-top,46px);height:calc(100vh - var(--chrome-top,46px));overflow-y:auto}body:has(.signs-nav){--chrome-top:91px}.sidebar-toggle{background:none;border:none;cursor:pointer;padding:3px 4px;color:#9ca3af;display:flex;align-items:center;border-radius:4px}.sidebar-toggle:hover{background:var(--hover,#f4f3ef);color:#555}.sidebar-toggle svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2.5}.icon-expand{display:none}.sidebar-collapsed .icon-collapse{display:none}.sidebar-collapsed .icon-expand{display:block}.tool-main{flex:1;min-width:0;display:flex;flex-direction:column}.tool-switcher-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.tool-switcher-label{font-size:.7rem;font-weight:700;color:#9ca3af;text-transform:uppercase;letter-spacing:.08em}.tool-sidebar.sidebar-collapsed .tool-switcher-label{display:none}.tool-sidebar.sidebar-collapsed .tool-tab{justify-content:center;padding:10px 0;gap:0}.tool-sidebar.sidebar-collapsed .tab-badge,.sidebar-collapsed .tab-label{display:none}.tool-tab{display:flex;align-items:center;border-radius:8px;cursor:pointer;font-weight:400;color:#555;margin-bottom:2px;transition:background .12s}.tool-tab:hover{background:var(--hover,#f4f3ef);color:#111}.tool-tab.active{background:var(--accent-tint,#f2f3f5)}.tool-tab svg{flex-shrink:0;stroke:currentColor;fill:none;stroke-width:1.8}