**Step 1: Input Markdown**: Receive markdown content as raw text or file path.
**Step 2: Parse Markdown**: Analyze markdown structure and formatting.
**Step 3: Generate EPUB Structure**: Create table of contents and navigation.
**Step 4: Apply Formatting**: Format text, code, tables, and other elements.
**Step 5: Create EPUB File**: Generate a valid EPUB3 file.
**Step 6: Output EPUB**: Provide the EPUB file for download.