Than Inner
CSS (Cascading Style Sheets) is a powerful tool used in web design to control the appearance and layout of a webpage. One of the many features that CSS offers is the ability to add borders to elements on a webpage. In this article, we will explore the use of CSS to create a double border effect, where the outer border is thicker than the inner border.
To get started, let's first understand the basics of adding borders with CSS. Borders can be added to any HTML element using the "border" property. This property takes three values: border-width, border-style, and border-color. For example, if we want to add a red border, we would use the following CSS code:
```
border: 2px solid red;
```
This will create a 2px thick solid red border around the element. Now, let's see how we can use this property to create a double border effect.
To create a double border, we will use two separate border properties: "border" and "outline". The "border" property will be used to create the inner border, while the "outline" property will create the outer border.
Let's start by creating a simple HTML document with a heading element and a paragraph element:
```
<html>
<head>
<title>CSS Double Border</title>
<style>
h1 {
border: 2px solid red;
}
p {
border: 2px solid blue;
outline: 4px solid green;
}
</style>
</head>
<body>
<h1>This is a heading</h1>
<p>This is a paragraph</p>
</body>
</html>
```
In the above code, we have added a 2px red border to the heading element and a 2px blue border with a 4px green outline to the paragraph element. This will give us a basic double border effect, but the outer border is not thicker than the inner border yet.
To make the outer border thicker, we will use the "outline-offset" property. This property allows us to specify the distance between the outline and the element's border. By default, the outline is placed on top of the border, but we can modify this using the "outline-offset" property.
Let's add the "outline-offset" property to our paragraph element and set its value to 2px:
```
p {
border: 2px solid blue;
outline: 4px solid green;
outline-offset: 2px;
}
```
Now, if we save and refresh our webpage, we can see that the outer border is thicker than the inner border.
But what if we want the colors of the borders to be different? We can achieve this by using the "border-color" and "outline-color" properties. Let's change the border colors to red and blue respectively:
```
p {
border: 2px solid red;
outline: 4px solid blue;
outline-offset: 2px;
}
```
And now, we have a double border effect with a thicker outer border and different colors for each border.
But why stop there? We can also add more borders and outlines to create a unique and eye-catching design. Let's add a second inner border to our paragraph element, this time with a dashed style and a green color:
```
p {
border: 2px solid red;
border-bottom: 4px dashed green;
outline: 4px solid blue;
outline-offset: 2px;
}
```
And just like that, we have a triple border effect with a thicker outer border, a solid inner border, and a dashed second inner border.
The possibilities with CSS borders and outlines are endless. By playing with different values and properties, you can create a variety of double border effects and add a unique touch to your webpage's design.
In conclusion, CSS offers a simple and effective way to create a double border effect, where the outer border is thicker than the inner border. By using the "outline" and "outline-offset" properties, along with the "border" property, we can add multiple borders with different styles and colors. So go ahead and experiment with CSS to create your own double border design and make your webpages stand out.
