.body {
  max-width: 750px;
  margin: auto;

  > h1 {
    padding: 40px 0;
  }
}

.navigation {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-bottom: 70px;
  background-color: #a6a6a6;
}

.section {
  & + & {
    margin-top: 50px;
  }
}

.section__title {
  padding: 7px 5px;
  background-color: #6f6f6f;
  color: #fff;
}

.section__about {
  dt {
    border-bottom: 1px solid #000;
    font-weight: 600;
  }

  dd {
    padding: 0;
    margin-top: 15px;
  }
}

.pagetop {
  position: sticky;
  bottom: 40px;
  margin-bottom: 30px;
  pointer-events: none;
  opacity: 0;
  translate: 0 1rem;
  transition: .3s ease-in-out;

  .is-scrolling & {
    translate: 0 0;
    pointer-events: all;
    opacity: 1;
  }


  a {
    display: grid;
    place-content: center;
    width: 100px;
    height: 100px;
    background-color: #a6a6a6;
    border-radius: 50%;
    color: #fff;
    text-align: center;
  }
}

.footer {
  padding: 60px 0;
  background-color: #a6a6a6;
}