A porcelain-studio WAI-ARIA menu-button dropdown: a glazed sheet with a second slab peeking from beneath, uppercase running heads, double-rule dividers, stamped mono keycap hints, petrol glaze-wash row states and full keyboard navigation — themed as a studio bureau's correspondence menu.

A multi-account switcher dropdown: an avatar trigger opens a panel with the signed-in account, a switch-account list rendered from data with photo avatars on accent discs and an active check, plus add-account, settings and sign-out actions, full keyboard navigation and outside-click close.

A profile dropdown led by an identity header for the signed-in account, with quick actions and soft key-chip shortcut hints, a What's new discovery item, a switch-account list of the other accounts with a hover switch arrow, a dark mode toggle row grouped above the error-weighted sign-out action — fully token-driven and design-system agnostic.

A dual-theme specialty-coffee exchange header with a silver-white light canvas, a deep near-black dark canvas, accent-filled actions, primary navigation, and two icon-tile mega-menus opened by real aria-expanded buttons and a focus-trapped mobile drawer.

A premium multi-select combobox: type to filter grouped, icon-led options with live match highlighting, selected values collapse into removable chips with a +N overflow pill, and a gradient selection meter tracks progress across the panel.

A Stripe-styled workspace switcher: a gradient logo-tile trigger opens a smooth-height reveal panel with the current-workspace header, a real-photo member facepile, a radio list that live-switches the trigger, a signed-in account row, plus create, settings and sign-out actions and keyboard.

A notifications activity-feed dropdown — a bell trigger with a live unread badge opens a WAI-ARIA menu panel holding an avatar feed with pulsing unread dots, an All/Unread filter, a real mark-all-read action, a scrollable row list and full keyboard navigation.

A Grepline searchable dropdown — a command-style mono search input filters models as you type, every match run underlined in signal green with a live result counter, plus skeleton loading rows, arrow-key navigation, Enter to select and Escape to close.

A private-banking ledger menu: accordion sections styled as a bound folio — typewritten indexes, letterspaced heads, roman entry counts and dotted-leader amounts. Single-open behavior with a cross-blur unfold and flip chevron, full ARIA wiring, keyboard navigation, data-driven groups.