console
<div class="container1">
<div>Hello World</div>
</div>
<div class="container2">
<div>Hello World</div>
</div>
<div class="container3">
<div>Hello World</div>
</div>
.container1 {
width: 400px;
height: 300px;
border: 1px solid red;
}
.container1 div {
width: 100px;
margin-left: auto;
margin-right: auto;
border: 1px solid blue;
}
.container2 {
width: 400px;
height: 300px;
border: 1px solid red;
writing-mode: vertical-rl;
}
.container2 div {
width: 100px;
margin-left: auto;
margin-right: auto;
border: 1px solid blue;
}
.container3 {
width: 400px;
height: 300px;
border: 1px solid red;
writing-mode: vertical-rl;
}
.container3 div {
inline-size: 100px;
margin-inline: auto;
border: 1px solid blue;
}