:root {
  --bg-color: #1b1b1e;
  --text-color: white;
  --typewriterSpeed: 500ms;
  --typewriterCharacters: 6;
  --typewriterCharactersB: 9;
}

body {
  margin: 0;
  font-family: "Source Sans Pro", sans-serif;
  min-height: 100vh;
  display: grid;
  place-content: center;
  text-align: center;
  background: var(--bg-color);
  color: var(--text-color);
}

h1 {
  font-size: clamp(1rem, 3vw + 1rem, 4rem);
  position: relative;
  font-family: "Source Code Pro", monospace;
  position: relative;
  width: max-content;
}

h1::before,
h1::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
}

h1#fst::before {
  background: var(--bg-color);
  animation: typewriter 300ms
    steps(var(--typewriterCharacters)) 1s forwards;
}

h1#fst::after {
  width: 0.125em;
  background: transparent;
  animation: typewriter 300ms
      steps(var(--typewriterCharacters)) 1s forwards,
    blink 750ms steps(var(--typewriterCharacters)) 4;
}

h1#snd::before {
  background: var(--bg-color);
  animation: typewriter var(--typewriterSpeed)
    steps(var(--typewriterCharactersB)) 3s forwards;
}

h1#snd::after {
  width: 0.125em;
  background: transparent;
  animation: typewriter var(--typewriterSpeed)
      steps(var(--typewriterCharacters)) 3s forwards,
    blink 750ms steps(var(--typewriterCharactersB)) 3s infinite;
}

.subtitle {
  color: var(--text-color);
  font-size: 2rem;
  font-weight: 400;
  opacity: 0;
  transform: translateY(3rem);
  animation: fadeInUp 2s ease 5s forwards;
}

.btn-outline-dark {
  color: var(--text-color);
  border-color: var(--text-color);
}

@keyframes typewriter {
  to {
    left: 100%;
  }
}

@keyframes blink {
  to {
    background: var(--text-color);
  }
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}