styles.css

@font-face {
  font-family: "Digital";
  src: url("https://assets.codepen.io/127738/digital-7+%28mono%29.ttf")
    format("truetype");
}
body {
  margin: 0;
}

.timer {
  font-family: Digital, monospace;
  font-size: min(max(14px, 7vw), 46px);
  color: #d7213c;
  border: 5px outset #8b8b8b;
  background: black;
  text-align: center;
  padding: 0 20px;
  position: absolute;
  bottom: 1.5vw;
  left: 1.5vw;
}

.container {
  height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(#58abc2 50%, #d7327a 50%);
  filter: brightness(0.7);
  transition: 0.4s ease-out;
}

.container .is-playing {
  filter: brightness(1);
}

.info {
  font-size: 30px;
  position: fixed;
  top: 0;
  left: 0;
  padding: 10px;
  background: white;
  z-index: 19;
}

.game {
  background: url(https://assets.codepen.io/127738/Squid_Game_Doll_bg.jpg);
  background-size: cover;
  background-position: center;
  position: relative;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.4);
  font-size: 0;
  border-radius: 10px;
}

.ui {
  position: absolute;
  background: black;
  max-width: 620px;
  z-index: 50;
  text-align: center;
  font-family: "Quicksand", sans-serif;
  font-weight: 400;
  border-radius: 20px;
  transition: 0.3s ease-out;
  color: white;
  box-shadow: 0 0 20px 2px #00000059;
  padding: 20px 60px;
  max-height: 90vh;
  width: 90%;
  top: 50%;
  left: 50%;
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.8);
}

.ui svg {
  position: absolute;
  top: 10%;
  left: 10%;
  opacity: 0.15;
  width: 80%;
  height: 80%;
  pointer-events: none;
}

.ui h1 {
  font-size: 600;
  font-size: 26px;
}

.ui p {
  font-size: 18px;
  margin-bottom: 0;
  margin-top: 10px;
}

.is-visible,
.is-howto-visible {
  opacity: 1;
  /* display: block; */
}

.is-hidden {
  display: none;
}

.cta {
  /* pointer-events: none; */
  background: white;
  border-radius: 0;
  border: none;
  font: inherit;
  font-size: 24px;
  font-weight: 600;
  margin-top: 30px;
  cursor: pointer;
  padding: 10px 20px;
}

.cta .is-ready {
  pointer-events: unset;
}

.win,
.dead .cta::before {
  content: none;
}

video {
  position: absolute;
  width: 100%;
  height: auto;
  opacity: 0;
}

p.countdown {
  font-size: 40px;
  color: white;
}

a:not(> footer) {
  color: white;
}

footer {
  position: absolute;
  font-family: "Quicksand", sans-serif;
  z-index: 10;
  color: black;
  text-align: center;
  display: block;
  width: 100%;
  bottom: 1em;
  font-size: 0.8em;
  font-weight: 800;
}

footer a {
  color: black;
}