Make the header stretch to the top of the page using CSS rounded edges

I'm trying to eliminate the white space above my blue header on a webpage with rounded corners. The header is at the top of the wrapper, but there's some empty space before it starts. Is there a way to make the header start right at the top edge of the wrapper? Any advice would be greatly appreciated! Below is a simplified version of the code I'm using, including inline CSS.

HTML

<div id="wrapper">
    <div id="header">
         <h1>Test Page</h1>

    </div>
    <!--header-->
    <div id="nav"> <a href="index.html">Home</a>  <a href="index.html">Link 1</a>  <a href="index.html">Link 2</a>  <a href="index.html">Link 3</a>  <a href="index.html">Link 4</a>

    </div>
    <!--nav-->
    <div id="main">
        <p>This is the test page.</p>
        <br/>
        <br/>
        <br/>
        <br/>
        <br/>
    </div>
    <!--main-->
</div>
<!--wrapper-->

CSS

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #999999;
}
h1 {
    line-height: 200%;
    margin-bottom: 0px;
}
a {
    padding-left: 10px;
    padding-right: 10px;
    color: #000000;
}
#wrapper {
    background-color: #FFFFFF;
    min-width: 760px;
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
    border: 1px solid #a1a1a1;
    border-radius: 25px;
}
#header {
    background-color: #40ebff;
    color: #FFFFFF;
    padding-left: 5px;
}
#nav {
    font-weight: bold;
    background-color: #ffdab2;
    padding: 5px;
}
#main {
    padding-left: 20px;
    padding-right: 20px;
}

FIDDLE > http://jsfiddle.net/znfa0Lkf/

Answer №1

include the following snippet in your code:

* {
  padding: 0;
  margin: 0;
}

also remember to include overflow:hidden; within your wrapper.

Answer №2

Check out the solution on JSFiddle

In order to fix the issue, it was necessary to include margin-top:0; in the styling for the h1 element to prevent it from being pushed down.

Additionally, you had to incorporate

border-top-left-radius:25px;
border-top-right-radius:25px;

into the styling for #header.

Alternatively, you could also apply overflow:hidden; to #wrapper. As pointed out by Woodrow Barlow in the comments:

some browsers may display a small portion of the underlying element when attempting to perfectly align rounded corners on top of each other (resulting in imperfect rendering)

Quick tip: When setting a value to 0, there is no need to add px. For instance, use margin-top:0; rather than margin-top:0px.

Answer №3

It has been recommended that implementing a simple CSS reset could be beneficial for you. By overriding the default paddings and margins set by the browser, you have more control over defining your own layout. This can also lead to more consistent results across different browsers.

The steps for the reset are straightforward. Just add the following code at the beginning of your CSS:

* {
margin:0;
padding:0;
}

You can then make some additional adjustments to achieve your desired page layout. For instance, adding margin:10px (adjust as needed) to the #wrapper will ensure that your rounded corner box is displayed correctly. Also, including overflow:hidden in the #wrapper prevents any square corners from protruding out of the container due to the rounded corners in the #header.

For a visual demonstration, check out this live demo.

Keep in mind that using a CSS reset is optional. If you prefer not to do so, simply adding margin-top:0 to the h1 selector can suffice. In this scenario, omitting the margin from the

#wrapper</code is possible, but remember to still include <code>overflow:hidden
. Here's a live demo reflecting that choice.

Answer №4

Here is a useful tip for you:

*{
  margin:0;
  padding:0;
}

Typically, there is default margin and padding applied to various elements, including the body. This creates space that may be visible on your page. By setting the margin and padding values to 0 using the universal selector (*), you can eliminate this extra spacing and create a more streamlined document layout.

Answer №5

#nav h1
{
    background-color: #ff8240;
    color: #000000;
    padding-left: 10px;
    margin: 15px;
    border-bottom-left-radius:20px;
    border-bottom-right-radius:20px;
}

http://jsfiddle.net/2r6t98GK/1/

Answer №6

Problem 1 > excessive margins around the "Wrapper"

The extra margins around your "Wrapper" are caused by default margins in "<body>" Simply remove the default Margin and Padding from "<body>"

Problem 2 > unwanted margins above the "Blue Header"

To fix this, add margin-top: 0px; since it's inheriting default margin for <h1>

Problem 3 > Radius disappears when removing margin from H1

Add overflow:hidden; to "#wrapper" so that <h1> and header stay within the boundaries of wrapper and don't override the style.

Here is the updated Fix:

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #999999;
    margin:0 auto; /*FIX ADDED*/
    padding:0; /*FIX ADDED*/
}
h1 {
    line-height: 200%;
    margin-bottom: 0px;
    margin-top: 0px; /*FIX ADDED*/
}
    


 #wrapper {
    background-color: #FFFFFF;
    min-width: 760px;
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
    border: 1px solid #a1a1a1;
    border-radius: 25px;
    overflow:hidden;  /*FIX ADDED*/
}

Check out the Working Fiddle > http://jsfiddle.net/0w646ba1/

**Apologies for initially missing the fix for the space above header.

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