html,
body {
  height: 100%;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
  overflow: hidden;
  font-family: Railway, sans-serif;
}
header {
  position: absolute;
  top: 0;
  width: 100%;
  height: 50px;
  padding: 4vh;
}
.header {
  font-size: 7vh;
  text-align: center;
  color: #ffffff;
}
footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 50px;
  padding: 12vh;
}
.footer {
  font-size: 5vh;
  text-align: center;
}
.footlink {
  color: #00ff00;
}
*,
*:before,
*:after {
  box-sizing: border-box;
}

/* ------------ SETTINGS ------------ */
body {
  background: #121212;
}

/* ------------ CARD ------------ */
.card {
  width: 70vw;
  height: calc(9 / 16 * 70vw);
  max-width: calc(16 / 9 * 70vh);
  max-height: 70vh;
  display: flex;
  position: relative;
  border-radius: 6px;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23);
  background: url("./images/darkMatter.jfif") center center/cover;
  overflow: hidden;
}

.card-play {
  width: 48px;
  height: 48px;
  position: relative;
  z-index: 1;
  margin: auto;
  opacity: 0;
  background: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/1613479/play.svg")
    center center/cover;
  cursor: pointer;
  transition: opacity 0.3s ease-out;
}

.card-play:after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: #000;
  transition: all 0.5s ease-out;
}

.card-video {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  z-index: 2;
  background: #000;
}
.card-video iframe {
  width: 100%;
  height: 100%;
}

.card:after {
  content: "";
  width: 250%;
  height: 250%;
  position: absolute;
  top: var(--y);
  left: var(--x);
  transform: translate(-50%, -50%);
  opacity: 0;
  background: radial-gradient(
    circle closest-side,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  transition: opacity 0.5s ease-out;
}

/* ------------ STATES ------------ */
.card:hover:after,
.card:hover .card-play {
  opacity: 1;
}

.video-is-open:after {
  display: none;
}

.video-is-open .card-play {
  opacity: 1;
}
.video-is-open .card-play:after {
  width: 2vh;
  height: 2vh;
  transform: translate(-50%, -50%) scale(88.8888888889);
  transition: transform 0.5s ease-out;
}

.footy {
  text-align: center;
  margin: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  width: 100%;
}
.lfArrow {
  font-size: 5vh;
  padding-right: 42vw;
  color: white;
}
.rtArrow {
  font-size: 5vh;
  padding-left: 42vw;
  color: white;
}