style.scss

html,
body {
  font-family: -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue",
    "Segoe UI", "ヒラギノ角ゴ ProN W3", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 28px;
  background-color: transparent;
  margin: 0;
  padding: 0;
}

.invisible {
  display: none;
}

body {
  &.light {
    color: #000;
    .about {
      h1 {
        color: #282c37;
      }
      span {
        color: #282c37;
      }
    }
    .row {
      section {
        span:last-child {
          color: #282c37;
        }
      }
    }
  }
  &.dark {
    color: #fff;
    .about {
      h1 {
        color: #d9e1e8;
      }
      span {
        color: #9baec8;
      }
    }
    .row {
      section {
        span:last-child {
          color: #d9e1e8;
        }
      }
    }
  }
  .about {
    display: flex;
    justify-content: flex-start;
    align-items: baseline;
    padding: 5px 0 20px 0;
    h1 {
      font-size: 26px;
      font-weight: 500;
      line-height: 30px;
      margin-right: 5px;
    }
    span {
      font-size: 16px;
      font-weight: 400;
      line-height: 16px;
    }
    span#week {
      flex-grow: 1;
    }
    * {
      margin: 0;
    }
  }
  .row {
    width: 100%;
    display: flex;
    justify-content: space-around;
    padding-bottom: 5px;
    text-align: right;
    section {
      -webkit-box-flex: 1;
      flex: 1 0 auto;
      padding: 0 10px;
      span {
        display: block;
      }
      strong {
        font-weight: 500;
        font-size: 32px;
        line-height: 48px;
      }
    }
  }
}