Each option is shown on a laptop with the account menu open, on a phone, and signed out. Click the round account button or ☰ inside a preview to try it. The account button opens your plan, AI pass days, your two devices, payments and sign out; when signed out it becomes Sign in next to Get lifetime access.
One row: logo, the four sections, a search button that opens a search box (Ctrl K), the AI pass days left and your account menu. On a phone the sections move into a menu behind the ☰ button.
Familiar and quiet; the page content starts high up. The paper you are in is not shown in the bar, so the breadcrumb does that job.
The paper you are studying sits next to the logo as a switch (Financial Management ▾), so changing paper is one tap. On a phone the four sections become a tab bar along the bottom of the screen, within thumb reach.
Best once all seven papers are live. The AI pass days move into the account menu.
A wide search box takes the centre of the top row, with the sections in a slim row underneath and the current paper on the right. On a phone, search is full width and the sections are a bottom tab bar.
Puts finding a question first. Takes two rows, so it uses a little more height than A or B.