Unexpected space between two divs [duplicate] - css

This question already has answers here:
Why is there an unexplainable gap between these inline-block div elements? [duplicate]
(6 answers)
Closed 7 years ago.
This is my code-
.a{
background:blue;
padding:30px;
Position:relative;
display:inline-block;
margin:0;
}
If 2 divs both with class a are entered, then there is a small space between it

Use 'float:left' and remove 'display:inline-block' hope it will solve problem

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I was searching for answer to my problem but nothing helped. Everyone talks about display:block then margin: auto and to give width so I did, but it didnt work. that's how it looks:
img.custom-logo {
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I'm working in wordpress if it's gonna help.
Thanks in advance

How does the overflow property work with the ul element? [duplicate]

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What is a clearfix?
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Closed 4 years ago.
In this example of a drop down menu navigation bar at w3school, when all the li elements gets float: left;, the background-color of ul is gone, but adding overflow: hidden; brings it back. How does that work?
The float: left removes li elements from the flow inside ul element. Since li are the only children of ul. 'ul' does not contain "anything" therefore no background. overflow: hidden is a technique similar to "clearfix" to force containment of float children.
Have a read on this link - Simple Tips on Containing Floats

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Floated element gets outside of its parent?
(5 answers)
Closed 6 years ago.
The li height is not defined and it automatically changes with the content. However, it only changes with the right hand side of its content rather than the left. Have changed the left side to block but it does not work. The link is as follows:
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Add this to your CSS:
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Is there a -moz equivalent of ::-webkit-scrollbar? [duplicate]

This question already has answers here:
Custom CSS Scrollbar for Firefox
(16 answers)
Closed 8 years ago.
I have used ::-webkit-scrollbar to hide scrollbars on an element in Safari/Chrome with the following CSS:
#element::-webkit-scrollbar { width:0 !important; height:0 !important }
Is there any way of accomplishing the same in Firefox?
If you just want to hide scrollbars, better use
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What ways of vertical text centering inside a div contaner do you know? [duplicate]

This question already has answers here:
How do I vertically center text with CSS? [duplicate]
(37 answers)
Closed 8 years ago.
What ways of vertical text centering inside a div contaner do you know?
text-align:center;
margin:0 auto; //tag needs to have a with
If a single line of text, setting the line height of the div to be the height of the div.
If the height of the content is known, position it absolutely - top: 50%, margin-top: -(half the height of the content) pixels.

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