/* * Purpose: the administration header in one place: the brand, the three area menus (Build, Write, * Site) with their dropdown panels, the account buttons, and the group bar under the header. Earlier * releases spread these rules over admin.css and appearance.css, where later rules silently overrode * earlier ones (0.33's dropdowns were clipped by an old phone rule's overflow:auto). * Communication: loaded last by admin/screens/layout.shell, after admin.css and appearance.css; the * markup comes from admin/navigation/menu.py; admin/assets/admin.js opens panels and places them. * Settings: --header-z keeps the header above the editor's canvas and side panels but below dialogs * (text toolbar 1500, gallery 1700, conflict banner 2100). * Edge cases: panels are position:fixed and placed by admin.js from the button's position, so no * container's overflow can clip them; on phones they span the screen width under the header. * Known limitations: tests/test_architecture.py requires .adminbar, .adminnav, .areapanel, and .subnav * rules to live only here. * Examples: