html {
  background: var(--paper);
  -webkit-text-size-adjust: 100%;
}

h1 rt {
  font-size: 0.3em;
}

.japanese {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 500;
  letter-spacing: 0.015em;
  line-height: 2;
}

.translation {
  margin: 0.65rem 0 0;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.96rem;
}

.control-button {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
  min-height: 2.65rem;
  padding: 0.55rem 0.8rem;
  border: 0;
  border-radius: 999px;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 800;
  transition:
    color 200ms ease,
    background 200ms ease;
}