In the realm of CSS and HTML, it is peculiar to see margin-top appearing as .5% despite being programmed at 0%

I'm currently working on styling a div element to have a width of 98%, with left and right margins set at 1%. However, I seem to be facing an issue where the top margin displays as 0.5% instead of the intended 0%. Could you please review my code below and point out any errors:

#container {
border: 1px solid black;
width: 98%;
height: 98%;
margin-top: 0%;
margin-left: 1%;
margin-right: 1%;
}

<div id='container'></div>

Answer №1

It appears that the white space at the top is due to the default top margin on the body element, which needs to be manually set to zero.

Additionally, assigning a height of 100% to both the body and html elements is necessary to ensure that the height of the div is not computed as zero.

body, html {
  margin: 0;
  height: 100%;
}
#div {
  border: 1px solid black;
  width: 98%;
  height: 98%;
  margin-top: 0%;
  margin-left: 1%;
  margin-right: 1%;
}
<div id='div'></div>

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