Picture an “Icon Forge” window that feels right at home on macOS: a single, border-light canvas floating against a soft graphite-grey backdrop (#2C2C2E). The top houses a translucent toolbar with crisp SF Symbols—just three: a broom (clear gallery), a bolt badge (clipboard-live indicator), and a gear (prefs). Below, the workspace splits neatly: on the left, a scrollable 6-column grid of thumbnail slots rendered as raised, frosted-glass tiles that subtly glow when an SVG is dragged in or copied. On hover, each tile animates with Apple-style spring damping, hinting selection without cluttering checkmarks.
The right “forge” pane is a single card with rounded-medium corners (12 px) and a gentle internal shadow. At the top sits a 2 × scale preview framed by the same glass material. Beneath, a monochrome hex-field and color-swatch button adopt the Finder’s inline form look—flat, accent-blue focus ring only when active. A slim divider line precedes three pill-buttons—Encode, Copy, Save—laid out in a single row, using the system accent for the primary action and neutral greys for the others. Typography sticks to San Francisco, 13 pt regular for body, 20 pt semi-bold for section headers. All motion—tile hover, button press, clipboard-captured toast—leads with 0.12 s ease-out and fades with 0.08 s ease-in, giving the entire Tkinter app a surprisingly native, quiet sophistication while staying lightweight and code-simple.