All items centered along the vertical axis except the last which should sit on the bottom using CSS Grid?

Question

I'm trying to get the answer to another question to work on the vertical axis using 'Method 5 CSS Grid Layout'.

The aim is to get all items centered along the vertical axis except the last which should sit on the bottom using CSS Grid?

The requirements are:

• The number of centered items can vary.
• The height of the container can vary.
• Can't change the HTML.

As you can see my first attempt at translating from the horizontal to the vertical is not working:

• Why are the items out of order?
• Why isn't the last item sitting on the bottom?
• How do I fix this?

ul {
  display: grid;
  grid-template-columns: 1fr repeat(3, auto) 1fr;
  grid-column-gap: 5px;
  justify-items: center;
}

ul li:nth-child(1) {
  grid-column-start: 2;
}

ul li:nth-child(4) {
  margin-left: auto;
}

ul,
ol {
  padding: 0;
  margin: 0;
  list-style: none;
  background: pink;
}

li {
  padding: 5px;
  background: #aaa;
}

p {
  text-align: center;
}


/* My attempt to get this working on a vertical layout */

ol {
  height: 400px;
  display: grid;
  grid-template-rows: 1fr repeat(3, auto) 1fr;
  row-gap: 5px;
  justify-items: center;
}

ol li:nth-child(1) {
  grid-row-start: 2;
  background-color: coral;
}

ol li:nth-child(4) {
  margin-top: auto;
  background-color: chartreuse;
}

<ul>
  <li>A</li>
  <li>B</li>
  <li>C</li>
  <li>D</li>
</ul>
<p><span>| true center |</span></p>

<ol>
  <li>1</li>
  <li>2</li>
  <li>3</li>
  <li>4</li>
</ol>

Answer 1

You are almost good, you need to add grid-auto-flow: column. You have to change the flow algorithm if you want to do the same in the opposite axis.

ul {
  display: grid;
  grid-template-columns: 1fr repeat(3, auto) 1fr;
  grid-column-gap: 5px;
  justify-items: center;
}

ul li:nth-child(1) {
  grid-column-start: 2;
}

ul li:nth-child(4) {
  margin-left: auto;
}

ul,
ol {
  padding: 0;
  margin: 0;
  list-style: none;
  background: pink;
}

li {
  padding: 5px;
  background: #aaa;
}

p {
  text-align: center;
}


/* My attempt to get this working on a vertical layout */

ol {
  height: 400px;
  display: grid;
  grid-template-rows: 1fr repeat(3, auto) 1fr;
  grid-auto-flow: column;
  row-gap: 5px;
  justify-items: center;
}

ol li:nth-child(1) {
  grid-row-start: 2;
  background-color: coral;
}

ol li:nth-child(4) {
  margin-top: auto;
  background-color: chartreuse;
}

<ul>
  <li>A</li>
  <li>B</li>
  <li>C</li>
  <li>D</li>
</ul>
<p><span>| true center |</span></p>

<ol>
  <li>1</li>
  <li>2</li>
  <li>3</li>
  <li>4</li>
</ol>