Create a Unity UGUI sprite atlas sheet for slicing. Square canvas 1:1. Transparent checkerboard-free pure empty transparent background in unused areas. NO text, NO labels, NO watermarks, NO sample characters, NO mockup screenshots — only empty reusable UI chrome sprites.

Style: casual candy mobile UI matching the reference — thick rounded corners, deeper same-hue outline stroke 2-4px, soft white top gloss highlight, soft drop shadow, creamy warm panels, glossy plastic candy look. Colors: cream panel #F6EBCF with brown border #C89B5C; primary green #7ED321 / dark #4E9A12; secondary blue #43B7F5 / dark #1E84C8; disabled grey #B9C0C8; focus/selected accent bright green #9EEB3B; close button coral red #FF5B5B; overlay dark #0B1724 at ~75% alpha; progress/slider fill green; scrollbar thumb blue.

Layout (top-left origin, compact packing, ≥8px gaps between sprites). Place sprites ONLY in upper-left area; leave rest of canvas empty/transparent:

ROW1 Y≈8:
- ui_panel_main 480x256 cream rounded panel empty
- ui_panel_popup 360x240 cream rounded popup empty
- ui_panel_content 320x200 light cream card empty
- ui_overlay_dim 192x192 semi-transparent dark rectangle

ROW2 Y≈280:
- btn_primary_normal 224x88 glossy green capsule button empty
- btn_primary_pressed 224x88 darker green pressed button empty
- btn_primary_disabled 224x88 grey disabled button empty
- btn_secondary_normal 224x88 glossy blue capsule button empty
- btn_close 72x72 coral red circular X close icon
- scrollbar_track_v 28x160 thin recessed vertical track
- scrollbar_thumb_v 28x80 blue rounded vertical thumb

ROW3 Y≈400:
- input_bg_normal 360x72 recessed light input field empty
- input_bg_focus 360x72 same with bright blue/green focus border
- ui_list_item_normal 320x72 cream list row empty
- ui_list_item_selected 320x72 cream list row with bright green selected border

ROW4 Y≈504:
- progress_bg 400x32 dark recessed capsule track
- progress_fill 400x32 glossy green capsule fill
- slider_track 320x28 dark recessed track
- slider_fill 320x28 glossy green fill
- slider_handle 56x56 white/blue glossy circle knob

ROW5 Y≈560:
- checkbox_off 56x56 rounded square empty
- checkbox_on 56x56 rounded square with green check
- ico_settings 56x56 glossy gear icon
- ico_refresh 56x56 glossy refresh arrows icon

Keep edges clean for 9-slice; consistent lighting from top; no overlapping sprites.