Return SVG code for a 576x384 pixel design. Background is a textured beige paper image covering the full width and height (https://wcyb5qfzc4ygdwpj.public.blob.vercel-storage.com/image-data-cache/746e8819314a12e35c38291020-IP06hwynHY7b2nVa1I3S0ROxVq5DDG.png). All text and lines in #7b3f2f color. 

Content from top to bottom:
- Vertical line from top edge to about 1/3 down page
- Text "EVEREST" in large sans-serif font, top left corner
- Vertical line from about 2/3 down page to bottom edge
- Small circular outline in bottom right, about 1/5 of page width
- Inside circle: Text "AFFIX POSTAGE HERE" in small caps sans-serif font, 3 lines
- 5 horizontal lines on right half of page, evenly spaced in bottom 2/3
- Empty hexagonal shape for postage stamp in top right, about 1/5 of page width
- Stylized mountain silhouette in bottom left corner

Return only the SVG code, no explanation.
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