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 twelve square button sprites: default, hover, pressed and disabled, each drawn three times — a standard 120×36 bar, a square icon button and a compact button for toolbars and inline actions. The three sizes are separate files rather than one scaled sprite because the drawing is size-dependent: the chamfer computed at 36 px is recomputed at the smaller ones, not shrunk. 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.

Four smaller parts cover what a menu needs between the panels: a tooltip with a pointer tail, a header bar that sits along the top of a panel, a section divider with a centre mark, and a label chip for counts and status tags. None of them are the window panel at another size — a nine-slice already stretches to any size, so a second file at a different width would be filler rather than a component.

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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