/*! HTML5 Boilerplate v8.0.0 | MIT License | https://html5boilerplate.com/ */

/* main.css 2.1.0 | MIT License | https://github.com/h5bp/main.css#readme */
/*
* What follows is the result of much research on cross-browser styling.
* Credit left inline and big thanks to Nicolas Gallagher, Jonathan Neal,
* Kroc Camen, and the H5BP dev community and team.
*/

/* ==========================================================================
Base styles: opinionated defaults
========================================================================== */

html {
  color: #222;
  font-size: 1em;
  line-height: 1.4;
}

/*
* Remove text-shadow in selection highlight:
* https://twitter.com/miketaylr/status/12228805301
*
* Vendor-prefixed and regular ::selection selectors cannot be combined:
* https://stackoverflow.com/a/16982510/7133471
*
* Customize the background color to match your design.
*/

/* ::-moz-selection {
  background: #b3d4fc;
  text-shadow: none;
}

::selection {
  background: #b3d4fc;
  text-shadow: none;
} */

/*
* A better looking default horizontal rule
*/

hr {
  display: block;
  height: 1px;
  border: 0;
  border-top: 1px solid #ccc;
  margin: 1em 0;
  padding: 0;
}

/*
* Remove the gap between audio, canvas, iframes,
* images, videos and the bottom of their containers:
* https://github.com/h5bp/html5-boilerplate/issues/440
*/

audio,
canvas,
iframe,
img,
svg,
video {
  vertical-align: middle;
}

/*
* Remove default fieldset styles.
*/

fieldset {
  border: 0;
  margin: 0;
  padding: 0;
}

/*
* Allow only vertical resizing of textareas.
*/

textarea {
  resize: vertical;
}

/* ==========================================================================
Author's custom styles
========================================================================== */

/* ==========================================================================
Helper classes
========================================================================== */

/*
* Hide visually and from screen readers
*/

.hidden,
[hidden] {
  display: none !important;
}

/*
* Hide only visually, but have it available for screen readers:
* https://snook.ca/archives/html_and_css/hiding-content-for-accessibility
*
* 1. For long content, line feeds are not interpreted as spaces and small width
*    causes content to wrap 1 word per line:
*    https://medium.com/@jessebeach/beware-smushed-off-screen-accessible-text-5952a4c2cbfe
*/

.sr-only {
  border: 0;
  clip: rect(0, 0, 0, 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  white-space: nowrap;
  width: 1px;
  /* 1 */
}

/*
* Extends the .sr-only class to allow the element
* to be focusable when navigated to via the keyboard:
* https://www.drupal.org/node/897638
*/

.sr-only.focusable:active,
.sr-only.focusable:focus {
  clip: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  position: static;
  white-space: inherit;
  width: auto;
}

/*
* Hide visually and from screen readers, but maintain layout
*/

.invisible {
  visibility: hidden;
}

/*
* Clearfix: contain floats
*
* For modern browsers
* 1. The space content is one way to avoid an Opera bug when the
*    `contenteditable` attribute is included anywhere else in the document.
*    Otherwise it causes space to appear at the top and bottom of elements
*    that receive the `clearfix` class.
* 2. The use of `table` rather than `block` is only necessary if using
*    `:before` to contain the top-margins of child elements.
*/

.clearfix::before,
.clearfix::after {
  content: " ";
  display: table;
}

.clearfix::after {
  clear: both;
}

/* ==========================================================================
EXAMPLE Media Queries for Responsive Design.
These examples override the primary ('mobile first') styles.
Modify as content requires.
========================================================================== */

@media only screen and (min-width: 35em) {
  /* Style adjustments for viewports that meet the condition */
}

@media print,
(-webkit-min-device-pixel-ratio: 1.25),
(min-resolution: 1.25dppx),
(min-resolution: 120dpi) {
  /* Style adjustments for high resolution devices */
}

/* ==========================================================================
Print styles.
Inlined to avoid the additional HTTP request:
https://www.phpied.com/delay-loading-your-print-css/
========================================================================== */

@media print {
  *,
  *::before,
  *::after {
    background: #fff !important;
    color: #000 !important;
    /* Black prints faster */
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  a,
  a:visited {
    text-decoration: underline;
  }
  
  a[href]::after {
    content: " (" attr(href) ")";
  }
  
  abbr[title]::after {
    content: " (" attr(title) ")";
  }
  
  /*
  * Don't show links that are fragment identifiers,
  * or use the `javascript:` pseudo protocol
  */
  a[href^="#"]::after,
  a[href^="javascript:"]::after {
    content: "";
  }
  
  pre {
    white-space: pre-wrap !important;
  }
  
  pre,
  blockquote {
    border: 1px solid #999;
    page-break-inside: avoid;
  }
  
  /*
  * Printing Tables:
  * https://web.archive.org/web/20180815150934/http://css-discuss.incutio.com/wiki/Printing_Tables
  */
  thead {
    display: table-header-group;
  }
  
  tr,
  img {
    page-break-inside: avoid;
  }
  
  p,
  h2,
  h3 {
    orphans: 3;
    widows: 3;
  }
  
  h2,
  h3 {
    page-break-after: avoid;
  }
}

@-webkit-keyframes argh-my-eyes {
  0%  { background-color: var(--color1) }
  49% { background-color: var(--color1); }
  50% { background-color: var(--color2); }
  99% { background-color: var(--color2); }
  100% { background-color: var(--color1); }
}
@-moz-keyframes argh-my-eyes {
  0%  { background-color: var(--color1) }
  49% { background-color: var(--color1); }
  50% { background-color: var(--color2); }
  99% { background-color: var(--color2); }
  100% { background-color: var(--color1); }
}
@keyframes argh-my-eyes {
  0%  { background-color: var(--color1) }
  49% { background-color: var(--color1); }
  50% { background-color: var(--color2); }
  99% { background-color: var(--color2); }
  100% { background-color: var(--color1); }
}

@-webkit-keyframes argh-my-eyes2 {
  0%   { color: var(--color2); }
  49%  { color: var(--color2); }
  50%  { color: var(--color1); }
  99%  { color: var(--color1); }
  100% { color: var(--color2); }
}
@-moz-keyframes argh-my-eyes2 {
  0%   { color: var(--color2); }
  49%  { color: var(--color2); }
  50%  { color: var(--color1); }
  99%  { color: var(--color1); }
  100% { color: var(--color2); }
}
@keyframes argh-my-eyes2 {
  0%   { color: var(--color2); }
  49%  { color: var(--color2); }
  50%  { color: var(--color1); }
  99%  { color: var(--color1); }
  100% { color: var(--color2); }
}

body {
  position: relative; /* usually the parent, in this case the body element, has position relative so that the absolute positioned child is positioned relative to it */
  height: 100vh; /* 100% of the viewport height */
  margin: 0; /* recommended */
  -webkit-animation: argh-my-eyes 200ms infinite;
  -moz-animation:    argh-my-eyes 200ms infinite;
  animation:         argh-my-eyes 200ms infinite;
}

.header {
  font-size: 5rem;
  margin:0;
  position: absolute; /* taken out of the normal flow of the document */
  top: 50%; /* moved down by 50% of the screen height */
  transform: translateY(-50%); /* moved back up (Y axis) by half of its height to achieve the perfect center */
  width: 100%; /* needs to be defined to keep the default block behavior */
  text-align: center;
  font-family: 'Roboto', sans-serif;
  -webkit-animation: argh-my-eyes2 200ms infinite;
  -moz-animation:    argh-my-eyes2 200ms infinite;
  animation:         argh-my-eyes2 200ms infinite;
}

.br {
  display: block;
  margin-bottom: -5rem;
}

@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@500&display=swap');

:root {
  --color1: rgb(197, 197, 197);
  --color2: rgb(36, 36, 36);
}