How to enlarge the image when falling over part of the vector?

Question

I have 1 in the upper left corner of the page, mostly off-screen, which functions as a home button. I would like to slightly increase its size when it hangs, but nothing seems to work.

Seeing how an image is a vector, which (thank God) is an ideal circle. Thus, with the area tag, I could easily make it the home button. Now I would like to enlarge the image, hovering over the area tag, I tried working with the "+" selector.

How do I do something like this?

This is a code snippet for some context:

.emblem {
  width: 200px;
  height: 200px;
  position: absolute;
  margin: -100px 0px 0px -80px;
  z-index: 2;
  opacity: 0.9;
}
.emblem:hover {
  width: 220px;
  height: 220px;
}
.emblem2 {
  visibility: hidden;
  width: 220px;
  height: 220px;
}
area:hover + .emblem2 {
  visibility: visible;
}

<map name="homemap">
  <area shape="circle" coords="100,100,100" alt="Home button" href="index.html" />
</map>
<img class="emblem" src="https://placeholdit.imgix.net/~text?txtsize=33&txt=350%C3%97150&w=350&h=150" alt="UFF emblem" usemap="#homemap" />
<img class="emblem2" src="https://placeholdit.imgix.net/~text?txtsize=33&txt=350%C3%97150&w=350&h=150" alt="UFF emblem" usemap="#homemap" />

Run code

Now it works great ... But only when I hang over the transparent part of the image, and what I want to achieve is the exact opposite.

Answer 1

, . - :

.emblem {
  width: 200px;
  height: 200px;
  opacity: 0.9;
  position: relative;
  -webkit-transition: all 200ms ease-in;
  -webkit-transform: scale(1); 
  -ms-transition: all 200ms ease-in;
  -ms-transform: scale(1); 
  -moz-transition: all 200ms ease-in;
  -moz-transform: scale(1);
  transition: all 200ms ease-in;
  transform: scale(1);   
}
.emblem:hover{
  -webkit-transition: all 200ms ease-in;
  -webkit-transform: scale(1.5);
  -ms-transition: all 200ms ease-in;
  -ms-transform: scale(1.5);   
  -moz-transition: all 200ms ease-in;
  -moz-transform: scale(1.5);
  transition: all 200ms ease-in;
  transform: scale(1.5);
}

<img class="emblem" src="https://placeholdit.imgix.net/~text?txtsize=33&txt=350%C3%97150&w=350&h=150" alt="UFF emblem" usemap="#homemap" />

Answer 2

CSS:

.img-box {
  cursor: pointer;
  height: 110px;
  position: relative;
  width: 110px;
}
.img-link {
  color: #000;
  text-decoration: none;
}
.img-link a,
.img-link a:active,
.img-link a:focus,
.img-link a:hover {
  border-color: transparent;
  color: #000;
  text-decoration: none;
}
.fa-hover {
  bottom: 0;
  font-size: x-large;
  position: absolute;
  right: 0;
}
.fa-hover:hover + .emblem {
  height: 100px;
  width: 100px;
}
.emblem {
  height: 75px;
  width: 75px;
}

<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>
<div class="img-box">
  <a class="img-link" href="https://www.google.ca" target="_window">
    <div class="fa-hover">
      <span class="fa fa-plus"></span>
    </div>
    <img class="emblem" src="https://lh3.ggpht.com/A0x3jzuH1qRkE10HcTiT4qQr_6iAqVg-CTsoIqxnoIFyv92V91WI3KqiVlOvLtfoMRg=w300" />
  </a>
</div>

"+" - , "img", css .