title.css

:root {
  --title-speed: 1s;
}

.title {
  text-align: center;
  font-size: 3em;
  font-family: monospace, sans-serif;
  height: 2em;
  vertical-align: top;
}

.title span {
  display: inline-block;
}

.vrai {
  position: relative;
  animation: vrai calc(var(--title-speed) / 2.5) ease;
  animation-fill-mode: forwards;
  animation-delay: var(--title-speed);
  transform-origin: center;
}

.ou {
  animation: ou calc(var(--title-speed) / 2.5) ease;
  animation-fill-mode: forwards;
  animation-delay: calc(var(--title-speed) / 2.5);
}

.o {
  position: relative;
  animation: o calc(var(--title-speed) / 2.5) ease;
  animation-fill-mode: forwards;
  animation-delay: calc(var(--title-speed) / 2);
}

.f {
  position: relative;
  animation: f calc(var(--title-speed) / 2.5) ease;
  animation-fill-mode: forwards;
  animation-delay: var(--title-speed);
}

.faux {
  position: relative;
  outline: solid red;
  animation: faux calc(var(--title-speed) / 2.5) ease;
  animation-fill-mode: forwards;
  animation-delay: var(--title-speed);
}

.aux {
  width: 0;
  position: relative;
  overflow: hidden;
  vertical-align: top;
  height: 1em;
  left: -0.5em;
  text-align: left;
  animation: aux calc(var(--title-speed) / 5) ease;
  animation-fill-mode: forwards;
  animation-delay: calc(var(--title-speed) * 1.2);
}

.qm {
  margin-left: 0.7em;
  position: relative;
  top: -2em;
  animation: qm calc(var(--title-speed) / 5) ease;
  animation-fill-mode: forwards;
  animation-delay: calc(var(--title-speed) * 1.5);
  transform-origin: center;
}

@keyframes ou {
  0% {
    margin-left: 0;
  }
  100% {
    margin-left: 1em;
  }
}

@keyframes vrai {
  0% {
    color: black;
    transform: scale(1);
  }
  80% {
    color: green;
    transform: scale(1);
  }
  90% {
    color: green;
    transform: scale(1.5);
  }
  100% {
    color: green;
    transform: scale(1);
  }
}

@keyframes o {
  0% {
    bottom: 0;
    left: 0;
  }
  20% {
    bottom: -1em;
    left: 0;
  }
  80% {
    bottom: -1em;
    left: -1.8em;
  }
  100% {
    bottom: 0;
    left: -1.8em;
  }
}

@keyframes f {
  0% {
    left: 0;
    color: black;
    transform: scale(1);
  }
  80% {
    color: red;
    left: 0.4em;
    transform: scale(1);
  }
  90% {
    color: red;
    left: 0.4em;
    transform: scale(1.5);
  }
  100% {
    color: red;
    left: 0.4em;
    transform: scale(1);
  }
}

@keyframes aux {
  0% {
    left: 0;
    margin-left: 0;
    width: 0;
    color: black;
  }
  80% {
    left: 0.5em;
    margin-left: -0.65em;
    width: 1.9em;
    transform: scale(1);
    color: red;
  }
  90% {
    left: 0.5em;
    margin-left: -0.65em;
    color: red;
    width: 1.9em;
    transform: scale(1.5);
  }
  100% {
    left: 0.5em;
    margin-left: -0.65em;
    color: red;
    width: 1.9em;
    transform: scale(1);
  }
}

@keyframes qm {
  0% {
    top: -2em;
  }
  50% {
    top: 0;
    transform: rotate(0);
  }
  70% {
    top: 0;
    transform: rotate(5deg);
  }
  80% {
    top: 0;
    transform: rotate(-5deg);
  }
  90% {
    top: 0;
    transform: rotate(5deg);
  }
  100% {
    top: 0;
    transform: rotate(-5deg);
  }
}