/* Cover mode for the wave-field page.
   Loaded with ?opening=1: the page keeps its own header and its
   "Click to continue" affordance, and stays put until the visitor clicks the
   title. The click runs the page's own page-reveal transition, which slides
   the wave field apart and lifts the brand animation into view. */

html[data-opening],
html[data-opening] body {
  overflow: hidden;
  background: #000;
}

/* The cover is a single screen: the in-page skip link would only add an
   invisible tab stop before the title. */
html[data-opening] .skip-link {
  display: none;
}