  direction: ltr; }
  .vr  { writing-mode: vertical-rl;    direction: ltr; }
  .vl_rtl { writing-mode: vertical-lr; direction: rtl; }
  .vr_rtl { writing-mode: vertical-rl; direction: rtl; }


  .container > .vl,     .container > .vr,
  .container > .vl_rtl, .container > .vr_rtl {
    /* In the testcase, these items are stretched horizontally
       via the default "align-self:stretch" behavior, and because
       they have a width of "auto".
       (The rest of the items have a non-auto width from "inline-