@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@400;700&display=swap');

body {
  background: #EDEDED;
  margin: 0;
  padding: 0;
  font-family: arial;
}

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

.books {
  text-align: center;
}

.books h1 {
  padding: 1em;
  width: 960px;
  margin: auto;
  border-bottom: 1px dashed #fff;
  font-family: 'Noto Serif JP', serif;
}

.books ul {
  display: flex;
  flex-wrap: wrap;
  width: 960px;
  margin: auto;
  list-style: none;
  padding-left: 0;
  padding-bottom: 80px;
}

.books li {
  width: 33%;
  margin-top: 20px;
}

.books .title {
  font-weight: 700;
}

.books .category {
  margin-top: 0.2em;
}

.books .tag {
  background-color: #fff;
  font-size: 70%;
  padding: 0.4em 0.8em;
  border-radius: 10px;
}

.books .number {
  font-size: 80%;
}

.books .text {
  margin: 2em 0;
}

footer {
  margin: 2em;
  text-align: center;
}

@media screen and (max-width:599px) {
  body {
    font-size: 3.5vw;
  }

  .pc {
    display: none;
  }

  .books h1 {
    width: auto;
  }

  .books ul {
    display: block;
    width: auto;
  }

  .books li {
    width: auto;
  }

  .books figure img {
    width: 80%;
  }
}

@media screen and (min-width:600px) {
  .sp {
    display: none;
  }
}