Layout and responsive · Lesson 14 of 14 · 7 minutes

Layout and responsive: Responsive layout checkpoint

A robust layout combines intrinsic sizing, bounded tracks, and spacing that survives narrow widths.

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Your objectives

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1
Build responsive layout checkpoint
Build this first target: main with max-width: 70rem, padding: 1rem, margin-inline: auto. Keep the selector relationships intact and inspect the preview.
Hint & worked example
A robust layout combines intrinsic sizing, bounded tracks, and spacing that survives narrow widths.
The requested selectors and declarations exist outside comments.
```
main { max-width: 70rem; padding: 1rem; margin-inline: auto; }
```
Common mistake to avoid: If the page fits one desktop viewport, no narrower viewport needs checking.
2
Extend the responsive layout checkpoint example
Extend your file to include: main with max-width: 70rem, padding: 1rem, margin-inline: auto; .layout with display: grid, grid-template-columns: repeat(auto-fit,minmax(min(100%,15rem),1fr)), gap: 1rem. Keep the selector relationships intact and inspect the preview.
Hint & worked example
A robust layout combines intrinsic sizing, bounded tracks, and spacing that survives narrow widths.
The requested selectors and declarations exist outside comments.
```
main { max-width: 70rem; padding: 1rem; margin-inline: auto; }
.layout { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: 1rem; }
```
Common mistake to avoid: Hiding all overflow always makes content accessible.
3
Verify the complete responsive layout checkpoint pattern
Finish the pattern with: main with max-width: 70rem, padding: 1rem, margin-inline: auto; .layout with display: grid, grid-template-columns: repeat(auto-fit,minmax(min(100%,15rem),1fr)), gap: 1rem; img with max-width: 100%, height: auto. Keep the selector relationships intact and inspect the preview.
Hint & worked example
A robust layout combines intrinsic sizing, bounded tracks, and spacing that survives narrow widths.
The requested selectors and declarations exist outside comments.
```
main { max-width: 70rem; padding: 1rem; margin-inline: auto; }
.layout { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: 1rem; }
img { max-width: 100%; height: auto; }
```
Common mistake to avoid: If the page fits one desktop viewport, no narrower viewport needs checking.

Understand the pattern

A robust layout combines intrinsic sizing, bounded tracks, and spacing that survives narrow widths.

Misconceptions to reject

If the page fits one desktop viewport, no narrower viewport needs checking.
Hiding all overflow always makes content accessible.

The preview is a sanitized subset, not a full browser compatibility test.

Worked example and expected result

main { max-width: 70rem; padding: 1rem; margin-inline: auto; }
.layout { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: 1rem; }
img { max-width: 100%; height: auto; }

A robust layout combines intrinsic sizing, bounded tracks, and spacing that survives narrow widths.

Try a variation

Adapt the final example to a different project name while retaining its structure and relationships. A different context still needs a real browser and accessibility check.

Explain it

Which statement correctly explains responsive layout checkpoint?If the page fits one desktop viewport, no narrower viewport needs checking.Hiding all overflow always makes content accessible.A robust layout combines intrinsic sizing, bounded tracks, and spacing that survives narrow widths.

Apply it elsewhere

You reuse responsive layout checkpoint in a different project. What must still be verified?Only whether the source code has the same number of lines.The resulting layout, focus behavior, and readability at the target viewport sizes.Nothing; passing a single exercise guarantees every future use.

Keep the momentum.

Complete the lab, then explain and apply the pattern.

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