Gain insights into designing mobile-responsive web layouts using Flexbox. Delve into Box Model basics, Flexbox containers, and item alignment, and apply your knowledge to create stunning, mobile-first websites.

CBCA - CSS with Flexbox (Intermediate)-01.jpg

In this course, you will get hands-on experience in designing mobile-responsive web layouts using Flexbox. You will start with the basics like the Box Model and the process of layouting.

You will then move on to advanced concepts such as Flexbox containers, and aligning individual Flexbox items. Near the end of the course, you will put everything you just learned into practice. You will work on a project that focuses on developing a mobile-first website where you’ll experiment with page layout, headers, footers, and a lot more.

By the end of this course, you will be able to use Flexbox in your own projects to create beautiful layouts.

Designing Web Layouts with CSS and Flexbox

# Step 1: Set up the breakpoint

Let's set up a responsive breakpoint at `768px`. We will keep all styles of the basic mobile layout and override the differences only.

```css
@media screen and (min-width: 768px) {

}
```

# Step 2: Styling the header 

The `flex-direction: column;` rule should become a `flex-direction: row;` rule in the header. 

To swap the Main Nav and the Logo elements, we can either add a `flex-direction: row-reverse;` rule to their container, or we can use an order value on at least one of the elements. We will define the `main-nav` to have an order of 1.

```css
@media screen and (min-width: 768px) {
    .header {
        flex-direction: row;
    }

    .main-nav {
        order: 1;
    }
}
```

To simplify the code, let's eliminate the `order` rule of the menu by setting up the `flex-direction` of the header to `row-reverse`.

```css
@media screen and (min-width: 768px) {
    .header {
        flex-direction: row-reverse;
    }
}
```

Let's also set up the `flex-grow`, `flex-shrink`, and `flex-basis` properties using the `flex` shorthand:

```css
@media screen and (min-width: 768px) {
    .header {
        flex-direction: row-reverse;
    }

    .header__menu {
        flex: 1 1 60vw;
    }

    .header__logo {
        flex: 2 3 40vw;
    }
}
```

# Step 3: Signup text, banner, signup form styling

First, change the `.main__cta` element's `flex-direction` to `row`.

We have to establish the desired order using a negative value for `signup-text`. Technically, the other two elements are in their original order. Therefore, no more `order` rules are needed.

There is no need to change the `order` rule, because Flexbox does not come with other simplified rules that make it easier to handle the repositioning of the Signup Text element.

Let's also set the `flex-basis` of the elements to the desired 30-40-30 ratio.

```css
    .main__cta {
        flex-direction: row;
    }

    .main__banner {
        flex-basis: 40vw;
    }

    .main__signup-text {
        order: -1;
        flex-basis: 30vw;
    }

    .main__signup-form {
        flex-basis: 30vw;
    }   
```

# Step 4: Blog post reordering and layouting

The `flex-direction` of the `.main__blog` element should be changed to `row`. As we will need two rows and two columns, we can make the `flex-wrap` property of the container `wrap`. Using the shorthand yields `flex-flow: row wrap;`.

Set the `width` property of `.main-blog__thumbnail` to `50vw`. 

To move the highlighted post to the front, add a negative `order` to it. There is no need to eliminate the `order` property because there is no easier Flexbox rule that achieves the same result.

```css
    .main__blog {
        flex-flow: row wrap;
    }

    .main-blog__thumbnail {
        width: 50vw;
    }

    .main-blog__thumbnail.highlighted {
        order: -1;
    }
```

# Full solution

This lesson contains the solution to the exercise in the previous lesson.

Getting Started

Using Flexbox Containers

Aligning Individual Flexbox Items

Designing a Mobile-first Website Using Flexbox

Flexbox Conclusion and Next Steps

Order Solution

Step 1: Set up the breakpoint

Step 2: Styling the header