Made some changes which sync with the other elements of the web page.#777

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AryaChakraborty:gh-pages

Commits on Aug 30, 2021

main heading moved to center and color synced, border radius given to back button and moved towards left using margin properties and red colour given when hovered
AryaChakraborty
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link added in 1st line
AryaChakraborty
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top-button added
AryaChakraborty
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