<!DOCTYPE html>

<style>
@import "resources/width-keyword-classes.css";
@import "resources/intrinsic-size-contribution.css";

.fixed {
    width: 50px;
}
</style>

<div class="container max-content">
    <div class="item fixed"></div>
</div>

<div class="container max-content">
    <div class="item fixed border"></div>
</div>

<div class="container max-content">
    <div class="item fixed padding"></div>
</div>

<div class="container max-content">
    <div class="item fixed margin"></div>
</div>

<div class="container max-content">
    <div class="item fixed border padding"></div>
</div>

<div class="container max-content">
    <div class="item fixed border margin"></div>
</div>

<div class="container max-content">
    <div class="item fixed border padding margin"></div>
</div>
