* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --body-color: #1d1e23;
  --primary-color: #ffffff;
  --second-color: #bd53ed;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;

  min-height: 100vh;
  background-color: var(--body-color);
}

h1 {
  font-size: 2rem;
  color: var(--primary-color);
}
h1 span {
  color: var(--second-color);
  position: relative;
}
h1 span::before {
  content: "";
  width: 2px;
  height: 30px;
  background-color: var(--second-color);
  
  position: absolute;
  right: -8px;
  top: 50%;
  transform: translateY(-50%);

  animation: blink .7s infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

h1 span.stop-blinking::before {
  animation: none;
}