You can achieve this layout using CSS Grid. Here's an example of how you can implement the grid system:

HTML:

html
 
 
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<div class="grid-container">
  <div class="col1">Column 1</div>
  <div class="col2">
    <div class="row">Row 1</div>
    <div class="row">Row 2</div>
    <div class="row">Row 3</div>
  </div>
</div>

CSS:

css
 
 
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.grid-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.col1 {
  background-color: lightblue;
}

.col2 {
  background-color: lightgreen;
  display: grid;
  grid-template-rows: repeat(3, 1fr);
}

.row {
  background-color: lightyellow;
}

In the above example, we create a grid container with 2 columns using grid-template-columns: 1fr 1fr;. The 1fr unit means that the columns will have equal width.

In the first column, we have a single div with the class col1, which will be used as the first column content.

In the second column, we have a div with the class col2, which will contain the multiple rows. To achieve the multiple rows, we set the grid-template-rows property to repeat(3, 1fr), which will create 3 rows of equal height.

Lastly, we have the divs with the class row inside the second column, which will represent the content of the rows.

You can customize the column and row classes with your desired styling to fit your needs.

CSS grid system is a way of organizing and laying out elements on a webpage in a grid-like structure. It helps to create responsive and flexible layouts.

Grid template columns allow you to define the number and size of columns in a grid. You can specify the width of each column individually or use keywords like "auto" or "1fr" to distribute the space evenly among the columns. Here is an example:

css
 
 
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.grid-container {
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
}

In this example, there are three columns in the grid. The first and last columns take up one fraction of the available space each, while the second column takes up two fractions.

Grid template rows work similar to grid template columns, but for rows in the grid. You can define the height of each row individually or use keywords like "auto" or "1fr" to distribute the height evenly. Here is an example:

css
 
 
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.grid-container {
  display: grid;
  grid-template-rows: 100px auto 50px;
}

In this example, there are three rows in the grid with fixed heights. The first row has a height of 100 pixels, the second row adjusts automatically to fit its content, and the third row has a fixed height of 50 pixels.

These CSS properties are used to create flexible and responsive grid layouts for webpages.

In the context of web development using Bootstrap, md stands for medium.

Bootstrap is a popular CSS framework that uses a grid system to create responsive layouts. The grid system divides the web page into 12 columns. The md in col-md-4 represents the medium-sized screens, indicating that the column should take up 4 out of the 12 available columns on medium-sized screens. This allows for flexible and responsive designs across different devices and screen sizes.

You can find more information about the Bootstrap grid system here.

No, col-6 and col-sm-6 do not mean the same thing in Bootstrap.

In Bootstrap, the col-6 class is used to create a column that takes up 6 units of the available width on all screen sizes. So, it will always take up half of the available width.

On the other hand, the col-sm-6 class is used to create a column that takes up 6 units of the available width only on small screens and larger. For screen sizes smaller than small, it will take up the entire width.

Here's an example to illustrate the difference:

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<div class="row">
  <div class="col-6">
    <!-- This column takes up half of the available width on all screen sizes -->
  </div>

  <div class="col-sm-6">
    <!-- On small screens and larger, this column takes up half of the available width -->
    <!-- On screens smaller than small, this column takes up the entire width -->
  </div>
</div>

For a complete understanding of the Bootstrap grid system, you can refer to the official Bootstrap documentation: Bootstrap Grid System