What is Reddit's secret to producing a clean top header with no margins?

While inspecting the code in Chrome Developer Tools, I noticed that when I tried to replicate it on my website, it didn't function the same way.

I realized that setting margin: 0; eliminated the margins, but shouldn't the margins technically be negative to remove all space?

I couldn't find in the CSS how the margins were completely removed.

Any suggestions?

Here is my CSS:

.header{
    width: 100%;
    height: 30px;
    background-color: #CCC;
    font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;  
    border-top: 1px solid black;
    border-bottom: 1px solid black;
    margin: 0px;
}

This is my HTML:

<div class = "header">
    <strong>Categories:</strong>
    <?php foreach($categories as $category): ?>
    <a href = ".?category_id=<?php echo $category['categoryID'];?>"><?php echo $category['categoryName'];?></a>
    <?php endforeach; ?>        
</div>
htmlcss

Answer №1

To ensure proper alignment, setting margins to zero may not be enough as the container itself could be adding its own space. It seems like you've removed the margin from the header but forgot about the padding in the body section. Consider including the following CSS rule:

body {
    margin: 0;
    padding: 0;
}

Answer №2

It seems that you may not be resetting your browser's default CSS settings properly. Have you tried including the following code:

* { padding: 0; margin: 0; }

This might help solve your spacing issue. While some people prefer not to use this method of resetting padding and margins because it applies the rule universally, it can be a quick way to test if this is indeed the problem.

If this resolves your problem, consider finding and using a more comprehensive CSS reset for your website.

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