@charset "UTF-8";
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
/* header */
h1 {
  text-align: center;
  margin: 40px auto;
}
/* main */
.button-box {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 40px;
}
.button {
  padding: 10px 20px;
  background-color: #666;
  color: #fff;
  border: none;
}
.button:hover {
  box-shadow: 0 0 10px #666;
  background-color: #888;
  cursor: pointer;
}
.grid-box {
  width: 960px;
  margin: 0 auto;
}
.grid-box::after {
  content: "";
  display: block;
  clear: both;
}
.grid-item {
  width: 25%;
  float: left;
  padding: 10px;
  text-align: center;
  margin-bottom: 20px;
}
.grid-item > div {
  height:260px;
  margin-bottom: 20px;
  background-color: #888;
}
.img01 {background: url(../img/img01_kimono_silk.webp) no-repeat center/cover;}
.img02 {background: url(../img/img02_alm_cotton.jpg) no-repeat center/cover;}
.img03 {background: url(../img/img03_bali.jpg) no-repeat center/cover;}
.img04 {background: url(../img/04_bet_cotton.jpg) no-repeat center/cover;}
.img05 {background: url(../img/05.jpg) no-repeat center/cover;}
.img06 {background: url(../img/06_en.jpg) no-repeat center/cover;}
.img07 {background: url(../img/07_englnad_wool.jpg) no-repeat center/cover;}
.img08 {background: url(../img/08_fra.jpg) no-repeat center/cover;}
.img09 {background: url(../img/09_china.webp) no-repeat center/cover;}
.img10 {background: url(../img/10_kan.jpg) no-repeat center/cover;}
.img11 {background: url(../img/11_tsumugi.jpg) no-repeat center/cover;}
.img12 {background: url(../img/12_sllilanca_cotton.jpg) no-repeat center/cover;}