Mint Panel UI Kit — title-barred panels and buttons

Flat design with the radius pulled almost all the way in. The light flat family runs a 20px corner and pill buttons because it is aimed at casual play; this one runs 8px and square buttons because a strategy screen is mostly rows and a generous radius wastes the width where the numbers go. There are no outlines and no shading anywhere — depth is three stacked shadow passes and nothing else.

Two nine-slice panels — a title-barred window frame with 8 px corners and a recessed inset frame with 6 px corners — cover almost every box a menu needs: dialogs, inventory grids, list backgrounds, tooltips and stat panels. A title band is built into the top of the panel, so a dialog header needs no second sprite and no manual alignment. Both stretch cleanly to any size because the corners never scale and the centre is a flat fill.

On top of the panels sit four square button states: default, hover, pressed and disabled. They are drawn on the same 120×36 base with 6 px corners, so you can swap the texture on a single button widget and get the whole interaction loop without moving a rectangle. The pressed state drops its face two pixels and removes the top highlight rather than just darkening, which is what makes a button feel clicked rather than merely recoloured.

Everything ships twice. The SVG sources are the files the kit was drawn in — open them, change the six blue-grey tones or the single mint green accent, and re-export. The PNG exports are flat, transparent and pre-scaled at 1x, 2x and 4x for engines that want bitmaps, with no premultiplied alpha and no baked-in shadow outside the sprite bounds.

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