Landscape PDF Presentation Redesign

I have a series of individual A4 portrait PDFs for our flagship schools program, and I want them re-imagined as one clean, landscape-format presentation. The goal is purely informative, so every slide should clearly showcase the program’s achievements without distracting flourishes.

Here’s what I need:
• Consolidate the existing portrait pages into a single landscape deck (PowerPoint, InDesign, or similar—whichever you prefer).
• Retain all current text and visuals, but reorganise them so achievements stand out visually.
• Apply simple, modern styling that respects my design preferences; there are no rigid brand guidelines to follow.
• Supply two files at the end: the final print-ready landscape PDF and the editable source file.

Keep the layout clean, fonts easy to read, and colours consistent across the deck. A quick first draft for feedback, followed by a final version, will be perfect for this basic refresh.