How can I horizontally center a <div> within another <div> using CSS?
<div id="outer">
<div id="inner">Foo foo</div>
</div>
With flexbox it is very easy to style the div horizontally and vertically centered.
#inner {
border: 0.05em solid black;
}
#outer {
border: 0.05em solid red;
width:100%;
display: flex;
justify-content: center;
}
<div id="outer">
<div id="inner">Foo foo</div>
</div>
To align the div vertically centered, use the property align-items: center.
Other Solutions
You can apply this CSS to the inner <div>:
#inner {
width: 50%;
margin: 0 auto;
}
Of course, you don't have to set the width to 50%. Any width less than the containing <div> will work. The margin: 0 auto is what does the actual centering.
If you are targeting Internet Explorer 8 (and later), it might be better to have this instead:
#inner {
display: table;
margin: 0 auto;
}
It will make the inner element center horizontally and it works without setting a specific width.
Working example here:
#inner {
display: table;
margin: 0 auto;
border: 1px solid black;
}
#outer {
border: 1px solid red;
width:100%
}
<div id="outer">
<div id="inner">Foo foo</div>
</div>
If you don't want to set a fixed width on the inner div you could do something like this:
#outer {
width: 100%;
text-align: center;
}
#inner {
display: inline-block;
}
<div id="outer">
<div id="inner">Foo foo</div>
</div>
That makes the inner div into an inline element that can be centered with text-align.
The best approaches are with CSS3.
The old box model (deprecated)
display: box and its properties box-pack, box-align, box-orient, box-direction etc. have been replaced by flexbox. While they may still work, they are not recommended to be used in production.
#outer {
width: 100%;
/* Firefox */
display: -moz-box;
-moz-box-pack: center;
-moz-box-align: center;
/* Safari and Chrome */
display: -webkit-box;
-webkit-box-pack: center;
-webkit-box-align: center;
/* W3C */
display: box;
box-pack: center;
box-align: center;
}
#inner {
width: 50%;
}
<div id="outer">
<div id="inner">Foo foo</div>
</div>
According to your usability you may also use the box-orient, box-flex, box-direction properties.
The modern box model with Flexbox
#outer {
display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: center;
align-items: center;
}
Read more about centering the child elements
CSS Box Model Module Level 3
Box model (CSS2)
box-align on MDN
And this explains why the box model is the best approach:
Why is the W3C box model considered better?
#centered {
position: absolute;
left: 50%;
margin-left: -100px;
}
<div id="outer" style="width:200px">
<div id="centered">Foo foo</div>
</div>
Make sure the parent element is positioned, i.e., relative, fixed, absolute, or sticky.
If you don't know the width of your div, you can use transform:translateX(-50%); instead of the negative margin.
With CSS calc(), the code can get even simpler:
.centered {
width: 200px;
position: absolute;
left: calc(50% - 100px);
}
The principle is still the same; put the item in the middle and compensate for the width.
I've created this example to show how to vertically and horizontally align.
The code is basically this:
#outer {
position: relative;
}
and...
#inner {
margin: auto;
position: absolute;
left:0;
right: 0;
top: 0;
bottom: 0;
}
And it will stay in the center even when you resize your screen.
Some posters have mentioned the CSS 3 way to center using display:box.
This syntax is outdated and shouldn't be used anymore. [See also this post].
So just for completeness here is the latest way to center in CSS 3 using the Flexible Box Layout Module.
So if you have simple markup like:
<div class="box">
<div class="item1">A</div>
<div class="item2">B</div>
<div class="item3">C</div>
</div>
...and you want to center your items within the box, here's what you need on the parent element (.box):
.box {
display: flex;
flex-wrap: wrap; /* Optional. only if you want the items to wrap */
justify-content: center; /* For horizontal alignment */
align-items: center; /* For vertical alignment */
}
.box {
display: flex;
flex-wrap: wrap;
/* Optional. only if you want the items to wrap */
justify-content: center;
/* For horizontal alignment */
align-items: center;
/* For vertical alignment */
}
* {
margin: 0;
padding: 0;
}
html,
body {
height: 100%;
}
.box {
height: 200px;
display: flex;
flex-wrap: wrap;
justify-content: center;
align-items: center;
border: 2px solid tomato;
}
.box div {
margin: 0 10px;
width: 100px;
}
.item1 {
height: 50px;
background: pink;
}
.item2 {
background: brown;
height: 100px;
}
.item3 {
height: 150px;
background: orange;
}
<div class="box">
<div class="item1">A</div>
<div class="item2">B</div>
<div class="item3">C</div>
</div>
If you need to support older browsers which use older syntax for flexbox here's a good place to look.
If you don't want to set a fixed width and don't want the extra margin, add display: inline-block to your element.
You can use:
#element {
display: table;
margin: 0 auto;
}
Centering a div of unknown height and width
Horizontally and vertically. It works with reasonably modern browsers (Firefox, Safari/WebKit, Chrome, Internet & Explorer & 10, Opera, etc.)
.content {
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
}
<div class="content">This works with any content</div>
Tinker with it further on Codepen or on JSBin.
Set the width and set margin-left and margin-right to auto. That's for horizontal only, though. If you want both ways, you'd just do it both ways. Don't be afraid to experiment; it's not like you'll break anything.
It cannot be centered if you don't give it a width. Otherwise, it will take, by default, the whole horizontal space.
CSS 3's box-align property
#outer {
width: 100%;
height: 100%;
display: box;
box-orient: horizontal;
box-pack: center;
box-align: center;
}
The way I usually do it is using absolute position:
#inner{
left: 0;
right: 0;
margin-left: auto;
margin-right: auto;
position: absolute;
}
The outer div doesn't need any extra properties for this to work.
I recently had to center a "hidden" div (i.e., display:none;) that had a tabled form within it that needed to be centered on the page. I wrote the following jQuery code to display the hidden div and then update the CSS content to the automatic generated width of the table and change the margin to center it. (The display toggle is triggered by clicking on a link, but this code wasn't necessary to display.)
NOTE: I'm sharing this code, because Google brought me to this Stack Overflow solution and everything would have worked except that hidden elements don't have any width and can't be resized/centered until after they are displayed.
$(function(){
$('#inner').show().width($('#innerTable').width()).css('margin','0 auto');
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="inner" style="display:none;">
<form action="">
<table id="innerTable">
<tr><td>Name:</td><td><input type="text"></td></tr>
<tr><td>Email:</td><td><input type="text"></td></tr>
<tr><td>Email:</td><td><input type="submit"></td></tr>
</table>
</form>
</div>
For Firefox and Chrome:
<div style="width:100%;">
<div style="width: 50%; margin: 0px auto;">Text</div>
</div>
For Internet Explorer, Firefox, and Chrome:
<div style="width:100%; text-align:center;">
<div style="width: 50%; margin: 0px auto; text-align:left;">Text</div>
</div>
The text-align: property is optional for modern browsers, but it is necessary in Internet Explorer Quirks Mode for legacy browsers support.
Use:
#outerDiv {
width: 500px;
}
#innerDiv {
width: 200px;
margin: 0 auto;
}
<div id="outerDiv">
<div id="innerDiv">Inner Content</div>
</div>
Another solution for this without having to set a width for one of the elements is using the CSS 3 transform attribute.
#outer {
position: relative;
}
#inner {
position: absolute;
left: 50%;
transform: translateX(-50%);
}
The trick is that translateX(-50%) sets the #inner element 50 percent to the left of its own width. You can use the same trick for vertical alignment.
Here's a Fiddle showing horizontal and vertical alignment.
More information is on Mozilla Developer Network.
Chris Coyier who wrote an excellent post on 'Centering in the Unknown' on his blog. It's a roundup of multiple solutions. I posted one that isn't posted in this question. It has more browser support than the Flexbox solution, and you're not using display: table; which could break other things.
/* This parent can be any width and height */
.outer {
text-align: center;
}
/* The ghost, nudged to maintain perfect centering */
.outer:before {
content: '.';
display: inline-block;
height: 100%;
vertical-align: middle;
width: 0;
overflow: hidden;
}
/* The element to be centered, can
also be of any width and height */
.inner {
display: inline-block;
vertical-align: middle;
width: 300px;
}
I recently found an approach:
#outer {
position: absolute;
left: 50%;
}
#inner {
position: relative;
left: -50%;
}
Both elements must be the same width to function correctly.
For example, see this link and the snippet below:
div#outer {
height: 120px;
background-color: red;
}
div#inner {
width: 50%;
height: 100%;
background-color: green;
margin: 0 auto;
text-align: center; /* For text alignment to center horizontally. */
line-height: 120px; /* For text alignment to center vertically. */
}
<div id="outer" style="width:100%;">
<div id="inner">Foo foo</div>
</div>
If you have a lot of children under a parent, so your CSS content must be like this example on fiddle.
The HTML content look likes this:
<div id="outer" style="width:100%;">
<div class="inner"> Foo Text </div>
<div class="inner"> Foo Text </div>
<div class="inner"> Foo Text </div>
<div class="inner"> </div>
<div class="inner"> </div>
<div class="inner"> </div>
<div class="inner"> </div>
<div class="inner"> </div>
<div class="inner"> Foo Text </div>
</div>
Then see this example on fiddle.
Centering only horizontally
In my experience, the best way to center a box horizontally is to apply the following properties:
The container:
should have text-align: center;
The content box:
should have display: inline-block;
Demo:
.container {
width: 100%;
height: 120px;
background: #CCC;
text-align: center;
}
.centered-content {
display: inline-block;
background: #FFF;
padding: 20px;
border: 1px solid #000;
}
<div class="container">
<div class="centered-content">
Center this!
</div>
</div>
See also this Fiddle!
Centering both horizontally & vertically
In my experience, the best way to center a box both vertically and horizontally is to use an additional container and apply the following properties:
The outer container:
should have display: table;
The inner container:
should have display: table-cell;
should have vertical-align: middle;
should have text-align: center;
The content box:
should have display: inline-block;
Demo:
.outer-container {
display: table;
width: 100%;
height: 120px;
background: #CCC;
}
.inner-container {
display: table-cell;
vertical-align: middle;
text-align: center;
}
.centered-content {
display: inline-block;
background: #FFF;
padding: 20px;
border: 1px solid #000;
}
<div class="outer-container">
<div class="inner-container">
<div class="centered-content">
Center this!
</div>
</div>
</div>
See also this Fiddle!
Flexbox
display: flex behaves like a block element and lays out its content according to the flexbox model. It works with justify-content: center.
Please note: Flexbox is compatible all browsers exept Internet Explorer. See display: flex not working on Internet Explorer for a complete and up to date list of browsers compatibility.
#inner {
display: inline-block;
}
#outer {
display: flex;
justify-content: center;
}
<div id="outer">
<div id="inner">Foo foo</div>
</div>
Text-align: center
Applying text-align: center the inline contents are centered within the line box. However since the inner div has by default width: 100% you have to set a specific width or use one of the following:
display: block
display: inline
display: inline-block
#inner {
display: inline-block;
}
#outer {
text-align: center;
}
<div id="outer">
<div id="inner">Foo foo</div>
</div>
Margin: 0 auto
Using margin: 0 auto is another option and it is more suitable for older browsers compatibility. It works together with display: table.
#inner {
display: table;
margin: 0 auto;
}
<div id="outer">
<div id="inner">Foo foo</div>
</div>
Transform
transform: translate lets you modify the coordinate space of the CSS visual formatting model. Using it, elements can be translated, rotated, scaled, and skewed. To center horizontally it require position: absolute and left: 50%.
#inner {
position: absolute;
left: 50%;
transform: translate(-50%, 0%);
}
<div id="outer">
<div id="inner">Foo foo</div>
</div>
<center> (Deprecated)
The tag <center> is the HTML alternative to text-align: center. It works on older browsers and most of the new ones but it is not considered a good practice since this feature is obsolete and has been removed from the Web standards.
#inner {
display: inline-block;
}
<div id="outer">
<center>
<div id="inner">Foo foo</div>
</center>
</div>
This method also works just fine:
div.container {
display: flex;
justify-content: center; /* For horizontal alignment */
align-items: center; /* For vertical alignment */
}
For the inner <div>, the only condition is that its height and width must not be larger than the ones of its container.
The easiest way:
#outer {
width: 100%;
text-align: center;
}
#inner {
margin: auto;
width: 200px;
}
<div id="outer">
<div id="inner">Blabla</div>
</div>
Flex have more than 97% browser support coverage and might be the best way to solve these kind of problems within few lines:
#outer {
display: flex;
justify-content: center;
}
If width of the content is unknown you can use the following method. Suppose we have these two elements:
.outer -- full width
.inner -- no width set (but a max-width could be specified)
Suppose the computed width of the elements are 1000 pixels and 300 pixels respectively. Proceed as follows:
Wrap .inner inside .center-helper
Make .center-helper an inline block; it becomes the same size as .inner making it 300 pixels wide.
Push .center-helper 50% right relative to its parent; this places its left at 500 pixels wrt. outer.
Push .inner 50% left relative to its parent; this places its left at -150 pixels wrt. center helper which means its left is at 500 - 150 = 350 pixels wrt. outer.
Set overflow on .outer to hidden to prevent horizontal scrollbar.
Demo:
body {
font: medium sans-serif;
}
.outer {
overflow: hidden;
background-color: papayawhip;
}
.center-helper {
display: inline-block;
position: relative;
left: 50%;
background-color: burlywood;
}
.inner {
display: inline-block;
position: relative;
left: -50%;
background-color: wheat;
}
<div class="outer">
<div class="center-helper">
<div class="inner">
<h1>A div with no defined width</h1>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.<br>
Duis condimentum sem non turpis consectetur blandit.<br>
Donec dictum risus id orci ornare tempor.<br>
Proin pharetra augue a lorem elementum molestie.<br>
Nunc nec justo sit amet nisi tempor viverra sit amet a ipsum.</p>
</div>
</div>
</div>
You can do something like this
#container {
display: table;
width: <width of your container>;
height: <height of your container>;
}
#inner {
width: <width of your center div>;
display: table-cell;
margin: 0 auto;
text-align: center;
vertical-align: middle;
}
This will also align the #inner vertically. If you don't want to, remove the display and vertical-align properties;
Here is what you want in the shortest way.
JSFIDDLE
#outer {
margin - top: 100 px;
height: 500 px; /* you can set whatever you want */
border: 1 px solid# ccc;
}
#inner {
border: 1 px solid# f00;
position: relative;
top: 50 % ;
transform: translateY(-50 % );
}
You can use display: flex for your outer div and to horizontally center you have to add justify-content: center
#outer{
display: flex;
justify-content: center;
}
or you can visit w3schools - CSS flex Property for more ideas.
Well, I managed to find a solution that maybe will fit all situations, but uses JavaScript:
Here's the structure:
<div class="container">
<div class="content">Your content goes here!</div>
<div class="content">Your content goes here!</div>
<div class="content">Your content goes here!</div>
</div>
And here's the JavaScript snippet:
$(document).ready(function() {
$('.container .content').each( function() {
container = $(this).closest('.container');
content = $(this);
containerHeight = container.height();
contentHeight = content.height();
margin = (containerHeight - contentHeight) / 2;
content.css('margin-top', margin);
})
});
If you want to use it in a responsive approach, you can add the following:
$(window).resize(function() {
$('.container .content').each( function() {
container = $(this).closest('.container');
content = $(this);
containerHeight = container.height();
contentHeight = content.height();
margin = (containerHeight - contentHeight) / 2;
content.css('margin-top', margin);
})
});
One option existed that I found:
Everybody says to use:
margin: auto 0;
But there is another option. Set this property for the parent div. It
works perfectly anytime:
text-align: center;
And see, child go center.
And finally CSS for you:
#outer{
text-align: center;
display: block; /* Or inline-block - base on your need */
}
#inner
{
position: relative;
margin: 0 auto; /* It is good to be */
}
I'm struggling trying to find a way to vertically align two images on two different columns
but I don't know how to do it.
Here the css of the two columns:
.left {
width: 50%;
height: 100%;
float: left;
text-align: center;
}
.right {
width: 50%;
height: 100%;
float: left;
text-align: center;
}
http://jsfiddle.net/6o6zwqLb/
I guess it should be pretty simple.
DEMO: http://jsfiddle.net/j55dxbe3/
I would use inline-block and make sure that my inline-block elements have no gap in the html (I used a comment to do this rather than making the font-size:0px on the parent and then putting a font size on the children).
HTML
<div id="center">
<div class="left">
<img src="http://placekitten.com/g/250/375" width="250" height="375" />
</div><!-- comment to close gap
--><div class="right">
<img src="http://placekitten.com/g/333/500" width="333" height="500" />
</div>
</div>
CSS:
.left, .right {
width: 50%;
height: 100%;
display:inline-block;
text-align: center;
vertical-align:middle;
}
Displaying your elements as table cells should cure what ails you:
#center {
...
display: table;
}
#center > div {
display: table-cell;
vertical-align: middle;
}
Demo
.left > img {
margin-top: 62px;
}
A margin-top of 62px on the smaller image will move it down where it is (about) 62px to the bottom of the page.
Demo
I've two floated DIVs (two columns) which are nested in an "clear-float"-DIV, which itself is nested in an centered DIV ("wrapper" DIV).
<div id="content">
<div class="block2">
<div id="slot_left">
CONTENT-LEFT
</div>
<div id="slot_right">
*CONTENT-RIGHT*
</div>
</div>
</div>
The right column has min-width and max-width CSS option set. But the wrapper DIV, which has min-width and max-width also, is always expanded to max width.
#content {
min-width: 300px;
min-height: 80px;
max-width: 350px;
margin: 0 auto;
background: #c00;
}
.block {
overflow: hidden;
_overflow: visible;
_overflow-x: hidden;
_height: 0;
}
#slot_left {
width: 200px;
background: #ff0;
float: left;
position: relative;
}
#slot_right {
float: left;
background: #cc0;
min-width: 100px;
max-width: 150px;
position: relative;
}
What's the reason for that? I want the wrapper DIV to has minimum width required but to be centered on screen.
Here is an fiddle.
use display:inline-block
why this is happening?? div is by default block level element, so when you have given max-width, it will always obey it to occupy max area possible....
http://jsfiddle.net/sHB7g/3/
CSS
#content {
min-width: 300px;
min-height: 80px;
max-width: 350px;
margin: 0 auto;
background: #c00;
display:inline-block
}
.block {
display:inline-block;
overflow: hidden;
border:1px solid #000;
}
http://jsfiddle.net/sHB7g/1/
#content {
display: inline-block;
}
and then added a content wrapper
#contentwrapper {
text-align: center;
}
the html then is like this
<div id="contentwrapper">
<div id="content">
<div class="block">
<div id="slot_left">
CONTENT-LEFT
</div>
<div id="slot_right">
*CONTENT-RIGHT*
</div>
</div>
</div>
I've got two div containers.
Whilst one needs to be a specific width, I need to adjust it, so that, the other div takes up the rest of the space. Is there any way I can do this?
.left {
float: left;
width: 83%;
display: table-cell;
vertical-align: middle;
min-height: 50px;
margin-right: 10px;
overflow: auto;
}
.right {
float: right;
width: 16%;
text-align: right;
display: table-cell;
vertical-align: middle;
min-height: 50px;
height: 100%;
overflow: auto;
}
<div class="left"></div>
<div class="right"></div> <!-- needs to be 250px -->
See: http://jsfiddle.net/SpSjL/ (adjust the browser's width)
HTML:
<div class="right"></div>
<div class="left"></div>
CSS:
.left {
overflow: hidden;
min-height: 50px;
border: 2px dashed #f0f;
}
.right {
float: right;
width: 250px;
min-height: 50px;
margin-left: 10px;
border: 2px dashed #00f;
}
You can also do it with display: table, which is usually a better approach: How can I put an input element on the same line as its label?
It's 2017 and the best way to do it is by using flexbox, which is IE10+ compatible.
.box {
display: flex;
}
.left {
flex: 1; /* grow */
border: 1px dashed #f0f;
}
.right {
flex: 0 0 250px; /* do not grow, do not shrink, start at 250px */
border: 1px dashed #00f;
}
<div class="box">
<div class="left">Left</div>
<div class="right">Right 250px</div>
</div>
You can use calc() Function of CSS.
Demo: http://jsfiddle.net/A8zLY/543/
<div class="left"></div>
<div class="right"></div>
.left {
height:200px;
width:calc(100% - 200px);
background:blue;
float:left;
}
.right {
width:200px;
height:200px;
background:red;
float:right;
}
Hope this will help you!!
If you can flip the order in the source code, you can do it like this:
HTML:
<div class="right"></div> // needs to be 250px
<div class="left"></div>
CSS:
.right {
width: 250px;
float: right;
}
An example: http://jsfiddle.net/blineberry/VHcPT/
Add a container and you can do it with your current source code order and absolute positioning:
HTML:
<div id="container">
<div class="left"></div>
<div class="right"></div>
</div>
CSS:
#container {
/* set a width %, ems, px, whatever */
position: relative;
}
.left {
position: absolute;
top: 0;
left: 0;
right: 250px;
}
.right {
position: absolute;
background: red;
width: 250px;
top: 0;
right: 0;
}
Here, the .left div gets an implicitly set width from the top, left, and right styles that allows it to fill the remaining space in #container.
Example: http://jsfiddle.net/blineberry/VHcPT/3/
If you can wrap them in a container <div> you could use positioning to make the left <div> anchored at left:0;right:250px, see this demo. I'll say now that this will not work in IE6 as only one corner of a <div> can be absolutely positioned on a page (see here for full explanation).
1- Have a wrapper div, set the padding and margin as you like
2- Make the left side div the width you need and make it float left
3- Set the right side div margin equal to the left side width
.left
{
***width:300px;***
float: left;
overflow:hidden;
}
.right
{
overflow: visible;
***margin-left:300px;***
}
<div class="wrapper">
<div class="left">
...
</div>
<div class="right" >
...
</div>
</div>
Hope this works for you!
There are quite a few ways to accomplish, negative margins is one of my favorites:
http://www.alistapart.com/articles/negativemargins/
Good luck!
set your right to the specific width and float it, on your left just set the margin-right to 250px
.left {
vertical-align: middle;
min-height: 50px;
margin-right: 250px;
overflow: auto
}
.right {
width:250px;
text-align: right;
display: table-cell;
vertical-align: middle;
min-height: 50px;
height: 100%;
overflow: auto
}
If you need a cross browser solution, you can use my approach, clear and easy.
.left{
position: absolute;
height: 150px;
width:150px;
background: red;
overflow: hidden;
float:left;
}
.right{
position:relative;
height: 150px;
width:100%;
background: red;
margin-left:150px;
background: green;
float:right;
}
Use the simple this can help you
<table width="100%">
<tr>
<td width="200">fix width</td>
<td><div>ha ha, this is the rest!</div></td>
</tr>
</table>
I have a container div and would like to place three div tags within the center div, I have the XHTML correct, but what I am having trouble in is, well, centering the three divs within the div.
I will now show the code.
XHTML 1.0 Transitional (HTML)
<div id="container">
<div id="header">
</div>
<div id="content">
<div id="contentbox">
</div>
<div id="contentbox">
</div>
<div id="contentbox">
</div>
</div>
</div>
Cascading Style Sheet (CSS)
#container {
width: 900px;
height: inherit;
margin: 30px auto;
}
#content {
float: center;
width: inherit;
height: inherit;
margin-left: auto;
margin-right: auto;
position: absolute;
}
#header {
margin: 0 auto;
background-image: url(images/logo.png);
background-position: center;
width: 250px;
height: 250px;
}
#contentbox {
margin-left: auto;
margin-right: auto;
float: left;
display: block;
width: 250px;
height: 250px;
background-image: url(images/contentbox.png);
}
To see an example of what I am trying to do, please visit http://www.noxinnovations.com/portfolio/hfc/
I want to know how to center those three content boxes within the content div.
Thank you very much,
Aaron Brewer
Check if this is what you want :
http://jsfiddle.net/65WHf/1/
Note that ID's are supposed to be unique, and there's no such thing as center floating. To center a div, you must ensure it's positioned relativelly to it's container (wich is the default behaviour of most browsers of my knowledge) and make use of the followinf syntax :
.something {
margin: 0 auto;
clear: both; // instead of float
}
Hey,
float: center; won't work. There's no such value for the float property.
use this instead for the #content css
text-align: center;
hope that helps.
You could always do something like this:
HTML:
<div id="container">
<div id="header"></div>
<div id="content">
<div class="contentbox"></div>
<div class="contentbox"></div>
<div class="contentbox"></div>
</div>
</div>
CSS:
.contentbox {
margin-left: auto;
margin-right: auto;
float: left;
display: block;
width: 250px;
height: 250px;
border: 1px dashed #999; /* just for visuals */
margin: 0 10px; /* just for visuals */
}
You definitely want to stay away from IDs as a general practice, do you can use them with javascript (jquery, etc) libraries. Plus it's cleaner that way.