header {
  display: flex; flex-flow: row nowrap;
  justify-content: center;
}

header > a {
  margin-top: 2rem;
}

main {
  display: flex; flex-flow: row nowrap;
  justify-content: center;
}

main > article {
  display: flex; flex-flow: column nowrap;
  justify-content: flex-start; align-items: center;
}

main > article > form {
  margin-top: 0.8rem;
}

main > article > form > .button-sso {
  display: flex; flex-flow: row nowrap;
  justify-content: center; align-items: center;
  width: 300px;
  height: 2.8rem;
  cursor: pointer;
  background-color: var(--color-card-background);
  border: 1px solid #d4d4d8;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  transition: border-color 200ms ease, box-shadow 200ms ease;
}


main > article > form > .button-sso:hover {
  border-color: var(--color-gray-border-hover);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

main > article > form > .button-sso > svg {
  margin-right: 5px;
}

main > article > form > .button-sso > span {
  margin-left: 5px;
  font-optical-sizing: auto;
  font-weight: 500;
  font-style: normal;
  font-size: 14px;
  color: black;
}

main > article > .explain {
  margin-top: 1rem;
  font-size: small;
  font-weight: normal;
  color: var(--font-color);
}

main > article > .first-timers {
  font-size: small;
  color: var(--font-color);
  margin-top: 3rem;
}

main > article > .first-timers > a {
  color: var(--font-color);
}

main > article > .first-timers > a:visited {
  color: var(--font-color);
}

main > article > .first-timers > a:hover {
  color: var(--font-color);
}

main > article > p > strong {
  font-weight: bold;
}

footer {
  display: flex; flex-flow: row nowrap;
  justify-content: space-around; align-items: center;
}

footer > p {
  margin-top: 5rem;
  max-width: 480px;
  font-size: small;
  color: var(--font-color-light);
}

footer > p > a {
  color: var(--font-color);
}

footer > p > a:visited {
  color: var(--font-color);
}

footer > p > a:hover {
  color: var(--font-color-high);
}

@media (max-width: 600px) {
  header > a > img {
    width: 130px;
    height: auto;
  }

  main > article > form > .button-sso {
    width: 260px;
  }

  footer > p {
    max-width: 100%;
    padding: 0 0.5rem;
  }
}