Professional Course Thumbnail Graphic Design

I need a clean, eye-catching thumbnail that will sit at the top of a new professional-development course site. The design should instantly signal credibility and modern learning, not the usual YouTube or social-media look. I’ll supply the course title, brand colours, and any imagery you need; you handle the layout, typography, and finishing touches.

Please craft the graphic at 1920 × 1080 px (or another standard hero size you recommend for learning platforms) and deliver both a ready-to-use PNG/JPEG and the editable source file (PSD or AI). The job is complete when the thumbnail looks polished on desktop and mobile previews, and any requested tweaks are applied.