html {
  background: #fff;
  color: #000;
  font-family: Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  font-size: 14px;
}

body {
  margin: 0;
}

a {
  color: #0000ff;
}

img {
  display: block;
  height: auto;
  max-width: 100%;
}

.page-shell {
  box-sizing: border-box;
  padding: 20px;
}

.brand,
.nav {
  margin-bottom: 10px;
}

.rule {
  background-color: #000;
  border: 0;
  height: 4px;
  margin: 10px 0;
  max-width: 732px;
}

.content {
  color: #000;
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 660px;
}

.content p {
  margin: 0 0 1.5em;
}

.contact {
  color: #000;
  font-style: normal;
  margin-top: 20px;
}

.copyright {
  color: #000;
  font-size: 12px;
  margin-top: 10px;
}

.profile {
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 760px;
}

.profile dl {
  display: grid;
  gap: 0;
  margin: 0;
}

.profile div {
  display: grid;
  grid-template-columns: 7.5em minmax(0, 1fr);
}

.profile dt,
.profile dd {
  margin: 0;
}

.profile dd span {
  display: block;
}

.not-found-title {
  font-size: 16px;
  margin: 0 0 12px;
}

@media (max-width: 560px) {
  .page-shell {
    padding: 16px;
  }

  .profile div {
    grid-template-columns: 1fr;
    margin-bottom: 4px;
  }

  .profile dt {
    font-weight: 700;
  }
}