To maintain the gaps between columns when resizing the grid, you can use the grid-gap property. This property sets the size of the gaps between the rows and columns of a grid. By default, the property sets the size for both the row and column gaps, but you can use the grid-column-gap property to set the size of the gap between columns specifically.

To maintain the gaps between columns when resizing the grid, you can set a minimum width for the columns so they won't shrink beyond the value you set. You can use the minmax() function to specify a minimum and maximum size constraint for the columns. When the grid is resized smaller than the minimum width of the columns, the columns won't shrink beyond that minimum width. Here's an example of the CSS code:

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.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  grid-column-gap: 20px;
}

In this example, the auto-fit value for the repeat() function causes the grid to automatically adjust the number of grid columns based on the available space. The minmax(200px, 1fr) argument sets a minimum width of 200px for each column, with a maximum of 1fr (i.e., equal distribution of the remaining space). The grid-column-gap: 20px; rule sets a gap of 20 pixels between the columns.

You can adjust the values of the minmax() function and the grid-column-gap property to fit your needs. Here's a link to the MDN documentation for more information and examples of how the minmax() function works: https://developer.mozilla.org/en-US/docs/Web/CSS/minmax

To add spacing around text inside a grid box, you can use the CSS padding property. This property specifies the amount of space between the element's content and its border.

Here's an example of how you can apply padding to a grid item:

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.grid-item {
  padding: 10px; /* add 10px padding around the content */
}

You can adjust the value of padding to add more or less space as needed.

Note that padding will add space inside the grid item, between the content and the border. If you want to add space outside the grid item (i.e., between the border and the edges of the grid container), you can use the grid-gap property. This property specifies the size of the gap between rows and columns.

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.grid-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 10px; /* add 10px gap between rows and columns */
}

Again, you can adjust the value of grid-gap to add more or less space as needed.

To display 3 cards in a grid of 3 columns, you can use the CSS Grid Layout. Here's an example code snippet that includes three cards displayed in three columns:

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<div class="grid-container">
  <div class="card">Card 1 content goes here</div>
  <div class="card">Card 2 content goes here</div>
  <div class="card">Card 3 content goes here</div>
</div>

<style>
.grid-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 20px;
}

.card {
  background-color: #fff;
  padding: 20px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
</style>

In this example, the grid-template-columns property defines a grid with three equal columns, and grid-gap adds a 20-pixel gap between the cards. The .card class styles the cards with a white background, padding, and a slight shadow effect.

You can adjust the styles of the .card class and the grid-container, to customize the appearance of the cards and the grid to your preference.

In CSS Grid, a common way to create spacing between items is to use the grid-gap property. This allows you to define the amount of space between grid items in either a horizontal or vertical direction. For example, to create a 20px gap between grid items in both the horizontal and vertical direction, you would add this code to your CSS file:

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.grid-container {
  display: grid;
  grid-gap: 20px;
}