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

body {
  font-family:
    "Hiragino Kaku Gothic ProN",
    "Hiragino Sans",
    Meiryo,
    sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  height: 100dvh;
}

.soudayo {
  font-size: 5rem;
  font-weight: bold;
  margin-bottom: 2rem;
}

.souda {
  opacity: 0;
  font-size: 2rem;
  font-weight: bold;
  line-height: 1rem;
  pointer-events: none;
  transition: all 0.14s ease-in-out;

  transform: translateY(2rem);
}

.souda.yo {
  opacity: 1;
  transform: translateY(.1rem);
}