midterm.scss

/*! HTML5 Boilerplate v7.3.0 | MIT License | https://html5boilerplate.com/ 

 * main.css 2.0.0 | 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;
}

/* ==========================================================================
   Browser Upgrade Prompt
   ========================================================================== */

.browserupgrade {
  margin: 0.2em 0;
  background: #ccc;
  color: #000;
  padding: 0.2em 0;
}

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


body {
  background-color: black;
}   

#body-wrapper {
  font-family: sans-serif; /* choose a better font */
  margin: 0 auto;
  max-width: 750px;
  text-align: center;
}

header {
  background-color: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

ul, ol {
  text-align: left;
  margin-left: 10%;
  margin-right: 10%;
}

.copy {
  padding: 10px 50px;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
}

.particle-wrapper {
  height: 400px;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr auto 1fr;
}

.particle-wrapper p {
  grid-row: 2/3;
  grid-column: 1/2;
}

.attribution {
  position: absolute;
  bottom: -35px;
  opacity: .5;
  font-size: 9pt;
  margin: 0 5px;
}

.particle-container {
  overflow: hidden;
  height: 100%;
  grid-row: 1/4; 
  grid-column: 1/2;
  position: relative;
}

.particle-subtle {
  position: absolute;
  border-radius: 50%;
  margin: 15px;
  background: white;
}

.starburst {
  position: absolute;
  transform-origin: center;
}

#starburst1 {
  left: 20px;
  animation: burst1 3s ease-in infinite backwards;
  animation-delay: 5s;
}

#starburst2 {
  left: 125px;
  animation: burst2 3s ease-in infinite backwards;
  animation-delay: 6s;
}

#starburst3 {
  left: 250px;
  animation: burst3 3s ease-in infinite backwards;
  animation-delay: 6.8s;
}

#starburst4 {
  left: 400px;
  animation: burst4 3s ease-in infinite backwards;
  animation-delay: 4.7s;
}

#starburst5 {
  left: 575px;
  animation: burst5 3s ease-in infinite backwards;
  animation-delay: 7s;
}

@keyframes flicker {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

@keyframes burst1 {
  0%, 20% {
    transform: rotate(-10deg) scale(1,0.8);
    opacity:0;
    top: 50px;
  }
  25% {
    opacity:1;
  }
  50%{
    transform: scale(1, 0.5);
    top: 50px;
  }
  75% {
    opacity:.5;
  }
  100% {
    opacity:0;
    transform: rotate(10deg) scale(1, 0.3);
    top: 250px;
  }
}

@keyframes burst2 {
  0%, 20% {
    transform: scale(1,0.8);
    opacity:0;
    top: 75px;
  }
  25% {
    opacity:1;
  }
  50%{
    transform: scale(1, 0.5);
    top: 75px;
  }
  75% {
    opacity:.5;
  }
  100% {
    opacity:0;
    transform: scale(1, 0.3);
    top: 275px;
  }
}

@keyframes burst3 {
  0%, 20% {
    transform: scale(1,0.8);
    opacity:0;
    top: 75px;
  }
  25% {
    opacity:1;
  }
  50%{
    transform: scale(1, 0.5);
    top: 75px;
  }
  75% {
    opacity:.5;
  }
  100% {
    opacity:0;
    transform: scale(1, 0.3);
    top: 275px;
  }
}

@keyframes burst4 {
  0%, 20% {
    transform: scale(1,0.8);
    opacity:0;
    top: 75px;
  }
  25% {
    opacity:1;
  }
  50%{
    transform: scale(1, 0.5);
    top: 75px;
  }
  75% {
    opacity:.5;
  }
  100% {
    opacity:0;
    transform: scale(1, 0.3);
    top: 275px;
  }
}

@keyframes burst5 {
  0%, 20% {
    transform: scale(1,0.8);
    opacity:0;
    top: 75px;
  }
  25% {
    opacity:1;
  }
  50%{
    transform: scale(1, 0.5);
    top: 75px;
  }
  75% {
    opacity:.5;
  }
  100% {
    opacity:0;
    transform: scale(1, 0.3);
    top: 275px;
  }
}

@keyframes grow1 {
  0%, 20% {
    transform-origin: center;
    top: 100px;
    left: 100px;
  }
  25% {
    transform-origin: 25px 25px;
    top: 75px;
    left: 75px;
  }
  75% {
    transform-origin: 75px 75px;
    top: 25px;
    left: 25px;
  }
  100% {
    transform-origin: 100px 100px;
    top: 0px;
    left: 0px;
  }
}

@keyframes grow2 {
  0%, 20% {
    transform-origin: center;
    top: 100px;
    left: 100px;
  }
  25% {
    transform-origin: 25px 25px;
    top: 75px;
    left: 75px;
  }
  75% {
    transform-origin: 75px 75px;
    top: 25px;
    left: 25px;
  }
  100% {
    transform-origin: 100px 100px;
    top: 0px;
    left: 0px;
  }
}

@keyframes grow3 {
  0%, 20% {
    transform-origin: center;
    top: 100px;
    left: 100px;
  }
  25% {
    transform-origin: 25px 25px;
    top: 75px;
    left: 75px;
  }
  75% {
    transform-origin: 75px 75px;
    top: 25px;
    left: 25px;
  }
  100% {
    transform-origin: 100px 100px;
    top: 0px;
    left: 0px;
  }
}

@keyframes grow4 {
  0%, 20% {
    transform-origin: center;
    top: 100px;
    left: 100px;
  }
  25% {
    transform-origin: 25px 25px;
    top: 75px;
    left: 75px;
  }
  75% {
    transform-origin: 75px 75px;
    top: 25px;
    left: 25px;
  }
  100% {
    transform-origin: 100px 100px;
    top: 0px;
    left: 0px;
  }
}

@keyframes grow5 {
  0%, 20% {
    transform-origin: center;
    top: 100px;
    left: 100px;
  }
  25% {
    transform-origin: 25px 25px;
    top: 75px;
    left: 75px;
  }
  75% {
    transform-origin: 75px 75px;
    top: 25px;
    left: 25px;
  }
  100% {
    transform-origin: 100px 100px;
    top: 0px;
    left: 0px;
  }
}

#starburst1 .star-wrapper {
  position: absolute;
  animation: 
  flicker 100ms steps(2, jump-none) infinite, 
  grow1 3s linear infinite backwards;
  animation-delay: 5s;
}

#starburst2 .star-wrapper {
  position: absolute;
  animation: 
  flicker 100ms steps(2, jump-none) infinite, 
  grow2 3s linear infinite backwards;
  animation-delay: 6s;
}

#starburst3 .star-wrapper {
  position: absolute;
  animation: 
  flicker 100ms steps(2, jump-none) infinite, 
  grow3 3s linear infinite backwards;
  animation-delay: 6.8s;
}

#starburst4 .star-wrapper {
  position: absolute;
  animation: 
  flicker 100ms steps(2, jump-none) infinite, 
  grow4 3s linear infinite backwards;
  animation-delay: 4.7s;
}

#starburst5 .star-wrapper {
  position: absolute;
  animation: 
  flicker 100ms steps(2, jump-none) infinite, 
  grow5 3s linear infinite backwards;
  animation-delay: 7s;
}

@for $i from 1 through 10 {
  .rotate#{$i} {
    transform: rotate(#{36*$i}deg);
  }
}

$star-size: 6px;

#starburst1 .particle-star {
  background: magenta;
}

#starburst1 .particle-star:before {
  background:magenta;
}

#starburst2 .particle-star {
  background: orangered;
}

#starburst2 .particle-star:before {
  background:orangered;
}

#starburst3 .particle-star {
  background: yellow;
}

#starburst3 .particle-star:before {
  background:yellow;
}

#starburst4 .particle-star {
  background: cyan;
}

#starburst4 .particle-star:before {
  background:cyan;
}

#starburst5 .particle-star {
  background: lime;
}

#starburst5 .particle-star:before {
  background:lime;
}

.particle-star {
  opacity: 1;
  width: $star-size;
  height: $star-size;
  position: absolute;
  text-align: center;
  transform: rotate(20deg);
}
.particle-star:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: $star-size;
  width: $star-size;
  opacity: 1;
  transform: rotate(135deg);
}

@keyframes blur_fade {
  0% {
    height: 2px;
    width: 2px;
    opacity: 0;
  }
  20% {
    filter: blur(0.2);
    opacity: 0.3;
  }
  100% {
    height: 40px;
    width: 40px;
    filter: blur(3px);
    opacity: 0;
  }
}

@keyframes circle {
  0% {
    transform-origin: -10px -10px;
    transform: rotate(0deg);
  }
  100% {
    transform-origin: -10px -10px;
    transform: rotate(360deg);
  }
}

@for $i from 1 through 30 {
  .particle-subtle:nth-child(#{$i}) {
    top: random($limit: 8)*50px;
    left: random($limit: 14)*50px;
    animation: 
      blur_fade 20s ease infinite alternate, 
      circle random($limit: 6)+4s linear infinite;
    animation-delay: random($limit: 16)-1s, random($limit: 5)-1s;
  }
}


#subtle {
  background: linear-gradient(#1c0f3b, #4d1354, #1c0f3b);
  color: white;
}

#fireworks {
  background-image: url("https://upload.wikimedia.org/wikipedia/commons/1/15/Sandiego_skyline_at_night.JPG");
  background-size: cover;
  background-position: top center;
  color: white;
}

#info1 {
  background-color: lemonchiffon;
}

#info2 {
  background-color: aliceblue;
}

#info3 {
  background-color: pink;
}








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

/*
 * Hide visually and from screen readers
 */

.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: " ";
  /* 1 */
  display: table;
  /* 2 */
}

.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: transparent !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;
  }
}