HTML: You can use the <div> element with the columns class to create an equal number of columns. For example, if you had two rows and three columns, you could do:

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<div class="columns">
  <div>Column 1</div>
  <div>Column 2</div>
  <div>Column 3</div>
</div>
<div class="columns">
  <div>Column 4</div>
  <div>Column 5</div>
</div>

CSS: You can modify the number of columns per row by setting the column-count property on the .columns class. For example, you can modify the code above for 3 columns in the first row and 2 columns in the second row like so:

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.columns{
  column-count: 3;
}

.columns:last-child{
  column-count: 2;
}

For more information, see CSS columns on W3schools.

If you are using HTML and CSS, the following should do the trick:

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ul {
    text-align: center;
} 
li {
    display: inline-block; 
}

This will align all list elements in the center of the page.

For more information, please see this tutorial.

You can use the background-image CSS property to set a full image background on an HTML element. Below is an example of how you can do it:

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element {
    background-image: url('path/to/image.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}

For more detailed information, this Stack Overflow article provides a comprehensive explanation: How do I set the background image of a div?

In Bootstrap 4, the .btn-outline-* class is a useful component for creating a button with an outline (or "ghost") look. This class works by setting the color and border of the button to the same value. For example:

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<button class="btn btn-outline-primary">Primary Outline</button>
<button class="btn btn-outline-secondary">Secondary Outline</button>
<button class="btn btn-outline-success">Success Outline</button>

The above code will create three buttons, each with a different color. The primary outline button will be blue, the secondary outline will be gray, and the success outline will be green. For more information, please refer to the Bootstrap Official documentation.

You can create a custom primary-button in Bootstrap by setting the Bootstrap .btn class and adding the .btn-primary modifier class. For example:

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<button type="button" class="btn btn-primary">Primary Button</button> 

You can also customize the look and feel of a primary button by setting additional classes like .btn-lg, .btn-sm, .btn-block and .btn-outline-*.

For more information, take a look at the Bootstrap documentation on Buttons.

No, HTML is not a programming language. HTML is a markup language used to define the structure of a web page. Programming languages, such as JavaScript, are used to manipulate the content and styling of a web page.

The Daraja API can be integrated with your Ruby on Rails application using the daraja gem. You can check out the documentation and instructions on how to set up the gem and create your Daraja payment integration.

In HTML and CSS, you can underline text on hover with the following code:

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a:hover {
  text-decoration: underline;
}

You'll need to wrap this code in a style tag. For example:

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<style> 
  a:hover {
    text-decoration: underline;
  }
</style>

For more information, you can refer to the CSS Hover Activity guide.

In HTML, you can add space between rows using the <br> tag. For example, to add a line break between two rows, you can use the following code:

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<div>
  Row 1
  <br>
  Row 2
</div>

For CSS, the margin-bottom attribute allows you to add space between rows. The following code shows an example of adding 10px of space between two rows:

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div:nth-of-type(1) {
  margin-bottom: 10px;
}

You can read more about using margin-bottom to add space between rows in CSS on W3Schools.

Responsive web design is a development approach that allows your web page content to look good on any device or screen size, whether it be a desktop, laptop, tablet, or phone. To make a page responsive using simple HTML, you can use the following techniques:

• Use a meta tag in the <head> element for mobile-friendly webpages:

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<meta name="viewport" content="width=device-width, initial-scale=1.0">

• Set a max-width on <img> tags to make sure they never exceed the width of the device's screen:

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<img src="myimage.jpg" style="max-width:100%;>

• Use em or rem units for font-sizes instead of pixels so the font-size is relative to its parent element:

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body { 
    font-size: 16px;
} 

h1 { 
    font-size: 2em;  
}

• Use the media query rules in your CSS to make different rules apply at different screen sizes or device types:

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@media only screen and (min-width: 600px) {
    /* styles for devices wider than 600px go here */
}

For more details on how to make a page responsive, you can check out this tutorial by W3Schools: https://www.w3schools.com/css/css_rwd_intro.asp

You can make an email link using HTML. An example of the code is below:

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<a href="mailto:someone@example.com">Send an email</a>

The mailto: attribute specifies the recipient. You can also add additional query parameters after the recipient like ?subject=Welcome to include a subject, or ?cc=example@xyz.com to include a carbon copy email address. More information can be found in this guide from CSS-Tricks.

The easiest way to add a blue color box around a button is to use CSS. For example, if you have an HTML button element with a class of "button" you could use CSS to apply the styling of a blue color box to the button. You could do this by adding the following line of code to your button class CSS:

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.button {
    background-color: blue;
}

Now when the button element is rendered in the browser, it will have a blue background. You can further customize the design around the border such as border thickness or rounded-corners with the padding or border-radius properties.

For more detailed examples and documentation, you can look into the official documentation for styling buttons with CSS: https://www.w3schools.com/css/css3_buttons.asp

Using CSS you can create an effect that makes text appear to be "hovering" on the screen. To do this, you need to create two separate classes, one for when the mouse is hovering over the text (for example, when the mouse is hovering over a link on a page) and one for when the mouse is not hovering over the text. To create the hover effect, you set different values on the text-decoration property between the two classes.

An example of using the :hover effect to underline text is provided here:

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.text {
  text-decoration: none;
}

.text:hover {
  text-decoration: underline;
}

Padding is an extra space that's added around the content of an element. This can be used to increase or decrease the space between specific elements in HTML, CSS, or other types of documents.

For example, in HTML you can use padding to adjust the space around the contents of a <div> element like this:

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div {
    padding: 20px;
}

Similarly, you can use padding to adjust the space inside a table cell:

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td {
    padding: 10px;
}

More information can be found here: https://www.w3schools.com/css/css_padding.asp

You can use the border CSS attribute to add a border to an image. For example:

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img {
  border: 1px solid #000000;
}

This code will add a 1 pixel solid black border to an <img> element on an HTML page. More information can be found here.

CSS provides a way to add shadow and depth to your HTML elements with the box-shadow property. To create a shadow for a button, use the following syntax:

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button {
  box-shadow: 5px 5px 10px #999;
}

The first two values in the box-shadow property define the horizontal and vertical offset from the elements, respectively. The third value defines how far the shadow should spread, and the fourth value defines the colour of your shadow. For more information about box-shadow, please refer to the MDN Web Docs article.

Adding a footer at the bottom of the page with HTML and CSS is very straightforward. You can do it by giving the <div> element a class or id and then setting the position to absolute, setting the values of the bottom, and left attributes to 0. To make sure the <div> element doesn't overlap with any other content, set the z-index to a higher number.

HTML:

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<div class="footer">Footer content</div>

CSS:

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.footer { 
    position: absolute; 
    bottom: 0; 
    left: 0; 
    z-index: 10;
}

For more information and examples, you can take a look at this article.

The code to create a button with a width of 50px would depend on which technology you are using.

For HTML, you could use the following:

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<button style="width:50px">My Button</button>

For CSS, you could use the following:

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button {
  width: 50px;
}

Alternatively, if you are using a UI library such as Bootstrap or Material UI, it might have specific classes for more complex styling. Here's an example using Bootstrap classes:

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<button class="btn btn-primary btn-sm">My Button</button>

HTML (HyperText Markup Language) is a markup language used to create web pages. HTML is written in the form of HTML elements, which consist of tags surrounded by angle brackets. HTML elements form the building blocks of all websites. Learn more at w3schools.

Adding a border to HTML elements can be done using the CSS border property. Here is an example:

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div {
    border: 5px solid black;
}

The border property takes the format border: [width] [style] [color]. The width (5px in this example) determines the thickness of the border, the style (solid) determines the type of border (solid, dotted, etc.), and the color (black) determines the color of the border.

For more detailed usage, please refer to this documentation by W3Schools: https://www.w3schools.com/css/css_border.asp.

In many programming languages, you can use the <p> tag to create a new paragraph. For example, in HTML you can use <p>My New Paragraph</p> to create a new paragraph with the text "My New Paragraph".

More information available here: MDN Docs

CSS provides different properties for setting the margins of an element. To add a margin to an element, use the following property:

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margin: 10px;

This will give each side of the element 10px margin. You can also easily specify different margins for the top, right, bottom and left side of an element. For example,

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margin: 10px 30px 20px 5px;

The above code will give the element a margin of 10px on the top, 30px on the right, 20px on the bottom and 5px on the left.

More information and additional properties can be found here: MDN Documentation.