max / goingson

Take button and card depth from the generated stylesheet First real deletion of the makeover-webview adoption. The generated layout.css carries .button, .card and their hover and pressed states, so the hand-written copies here go. Removed: background and box-shadow from .button and .card, and the .button:hover, .button:active, .card:hover and .card:active rules entirely. What stays is everything that was never depth -- box model, type, cursor -- plus the variants, which still win over the generated states on source order (layout.css loads before this file). Two visible changes, both consequences of the phase A decisions rather than of this commit: - Hover moves from --surface-overlay to --hover-surface. - Pressing moves from --surface-sunken to --surface-well. Since surface-well inverts by theme where surface-sunken does not, a dark theme now presses lighter than it hovers. That is makeover's derivation talking, and the note on it is in wiki makeover-webview. Also fixes a pre-existing inconsistency it would otherwise have carried forward: .button:disabled:active overrode only box-shadow, so a disabled button took the pressed fill while keeping the raised edge. Disabled is inert on both properties now.