title: Animate menu border on hover
body: <p>I just started to code a web page and now at the end I want to add some special animations, I have a horizontal menu which have dropdowns, and I want an animation when I hover this menu points. 
  I have seen this animation with a border on <a href="https://harvard.edu" rel="nofollow noreferrer">https://harvard.edu</a>
  Can you help me with this animation?
  Thanks :D</p>