Make opaque div with text appear over image box over image upon hover - css

Question

I have text that appears on top of an image when you hover over the image. Originally, I also had the entire image go opaque upon hovering.
Now I've decided I want to make only a section of the image go opaque upon hovering, the part with the text. I tried the tutorial here. Unfortunately, once I made those changes, nothing appears when I hover over the image -- not the text or any opaque filter.
Here is my html file:
<div class="container">
<div class="main">
<div class = "JFK">
<h6>JFK</h6>
<div class = "transbox">
<p> to
from</p>
</div>
</div>
/* continues on*/
Here is my css:
JFK {
position: relative;
left: 110px;
height: 300px;
width: 300px;
bottom: 40px;
background-image: url(https://media-cdn.tripadvisor.com/media/photo-s/03/9b/2d/f2/new-york-city.jpg);
line-height: 200px;
text-align: center;
font-variant: small-caps;
display: block;
}
.transbox{
margin: 30px;
background-color: $ffffff;
border: 1px solid black;
opacity: 0.6;
display: none;
}
.JFK h6{
font-size: 30px;
font-variant: small-caps;
font-weight: 600;
}
.transbox p{
position: relative;
top: -90px;
word-spacing: 100px;
font-size: 30px;
font-variant: small-caps;
font-weight: 600;
color: #c4d8e2;
display: none;
}
.JFK p a{
color: #c4d8e2;
top: -30px;
}
.JFK:hover transbox p {
display: block;
}
.JFK:hover{
display: block;
}
.JFK: hover transbox{
display: block;
opacity:0.6;
}
I thought I had added a wrapper class as suggested here by adding the transbox div. I also tried the background-color:rgba(255,0,0,0.5); trick mentioned here. No luck -- still nothing happens upon hover. Any suggestions?

Answer 1

Your problem lies with these 2 pieces of code in your css:
.JFK:hover transbox p {
display: block;
}
.JFK: hover transbox{
display: block;
opacity:0.6;
}
Firstly . is missing from the class transbox - is should be .transbox
Secondly there is a space between .JFK: and hover remove the space and it should all work.
.JFK:hover .transbox p {
display: block;
}
.JFK:hover .transbox{
display: block;
opacity:0.6;
}

Answer 2

Your code is not complete. In the "tutorial" you said you tried, <div class = "transbox"> is just a box with transparent background that is positioned above another box, with a background-image. You said you need "only a section of the image go opaque upon hovering".
Also, your CSS is not valid. "JFK" is a class, in the first row, so is ".JFK".
Then, is
.transbox {
margin: 30px;
background-color: #ffffff;
}
You wrote again with errors.
You can use:
.transbox{
margin: 30px;
background-color: rgba(255,255,255,0.6);
border: 1px solid black;
}