Wordpress : Child-theme CSS weird behavior - html

Question

I am currently customizing a wordpress theme.
Here my case, through a widget, I generate a div which has several classes :
<div class="col-lg-3 focus-box item-1">...</div>
The parent theme and bootstrap stylesheet already apply respectively properties on focus-box and col-lg-3 classes.
Well, I added to my child-theme stylesheet (which works well for many others things) this :
.item-1 { background-color: orange; }
And this does not work... nothing happen but I tried to do this in my child-theme CSS :
.col-lg-3 (or focus-box) { background-color: orange; }
.item-1 { background-color: orange; }
This way works... I really don't understand anything to what is happening here.
My Child-theme stylesheet is the last one to be load, so It should override all others, isn't it ?
If anyone has a clue, I would appreciate to get it :-)
Thanks in advance for your help.
Sommy

Answer 1

Thanks for your answers.
First, I already tried to use !important it didn't work, it was the same using stronger selector.
I know how to inspect code with my browser, and that's why I told you that my child-theme css was the last one to be loaded because I checked it.
The thing really weird, according to me, is that the result is different if I put col-lg-3 in my stylesheet or not.
I have similar issues with others HTML elements in my code.
To sum up :
My Child-Theme CSS is loaded after the parent-one
I checked it in my browser development tool
I also notice that the place where my CSS properties is change the result, if I put it at the end of my child-theme css it sometimes work example :
{
/* IF I PUT THE SELECTOR .focus-box .service-icon here It doesn't work */
/* SEE THE LAST ELEMENT BELOW */
.focus-box:nth-child(4n+1) .service-icon:hover {
border: 5px solid #e96656;
}
.focus-box:nth-child(4n+2) .service-icon:hover{
border: 5px solid #34d293;
}
.focus-box:nth-child(4n+3) .service-icon:hover {
border: 5px solid #3ab0e2;
}
.focus-box:nth-child(4n+4) .service-icon:hover{
border: 5px solid #f7d861;
}
.focus-box:nth-child(4n+1) .red-border-bottom:before {
background: #e96656;
}
.focus-box:nth-child(4n+2) .red-border-bottom:before {
background: #34d293;
}
.focus-box:nth-child(4n+3) .red-border-bottom:before {
background: #3ab0e2;
}
.focus-box:nth-child(4n+4) .red-border-bottom:before {
background: #f7d861;
}
.focus-box h5 {
margin-bottom: 15px;
color: #404040;
position: relative;
display: inline-block;
text-transform: uppercase;
margin-bottom: 30px;
font-weight: bold;
font-size: 17px;
float: none;
width: 100%;
background-color: rgba(224,82,6,0.2);
}
.other-focuses {
background: url(images/lines.png) repeat-x center;
margin-bottom: 25px;
}
.other-focuses .section-footer-title {
padding: 0 15px;
color: #404040;
font-weight: bold;
}
.other-focus-list {
padding-top: 5px;
margin-bottom: -17px;
}
.other-focus-list ul li {
display: inline-block;
margin-right: 50px;
padding-bottom: 15px;
text-transform: uppercase;
}
.other-focus-list ul li:last-child {
margin-right: 0;
}
.other-focus-list ul li i {
margin-right: 8px;
}
.item-dashboard {
padding: 20px 0 20px 0;
}
.focus-box p {
font-size: 14px;
color: black;
}
/* IF I PUT IT THERE THEN IT WORKS */
.focus-box .service-icon {
margin-bottom: 30px;
width: 145px;
height: 145px;
margin: auto;
border-radius: 50%;
border: 0px solid #ececec;
margin-bottom: 20px;
position: relative;
-webkit-transition: all 0.2s ease-in-out;
transition: all 0.2s ease-in-out;
}
Focus Box HTML Code :
<div class="col-lg-3 col-sm-3 focus-box item-dashboard" data-scrollreveal="enter left after 0.15s over 1s">
<div class="service-icon">
<a href="#">
<i class="pixeden" style="background:url(#/wordpress/wp-content/uploads/2015/10/cle_main_2.png) no-repeat center;width:100%; height:100%;"></i> <!-- FOCUS ICON-->
</a>
</div>
<!-- FOCUS HEADING -->
</div>
The question is why my child-theme CSS doesn't correctly override the parent one ? Why the place of my css element affect the result (I know the place affect if you override a property, but here it doesn't look like this...)
Thansk again for you help.

Answer 2

I finally overcame this issue by reviewing my style sheet loading priority and so on.
Thanks everyone.