.header {
  align-items: center;
  display: flex;
  height: 3.5rem;
  opacity: 1;
  overflow: hidden;
  padding: 0 1rem;
  position: relative;
  top: 0;
  transition: height 0.5s ease-in-out;
  width: 100%;
}

.header--hidden {
  height: 0;
}

@media (min-width: 600px) {
  .header {
    height: 4rem;
  }

  .header--hidden {
    height: 0;
  }
}

.header__logo {
  flex-shrink: 0;
  height: 3rem;
  padding: 0.5rem;
  width: 3rem;
}

.header__title {
  flex-grow: 1;
  flex-shrink: 0;
  font-family: 'Roboto Mono', monospace;
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.0125em;
  line-height: 2rem;
  opacity: 0.87;
  padding: 0.5rem;
  white-space: nowrap;
}

.header__link {
  all: unset;
  border-radius: 100%;
  box-sizing: border-box;
  cursor: pointer;
  flex-shrink: 0;
  height: 3rem;
  padding: 0.75rem;
  position: relative;
  width: 3rem;
}

.header__icon {
  opacity: 0.87;
}

.header__link:hover::after,
.header__link:focus::after,
.header__link:active::after {
  background: currentcolor;
  border-radius: 100%;
  content: '';
  height: 3rem;
  left: 0;
  position: absolute;
  top: 0;
  width: 3rem;
}

.header__link:hover::after {
  opacity: 0.08;
}

.header__link:focus::after {
  opacity: 0.24;
}

.header__link:active::after {
  opacity: 0.32;
}