@charset "UTF-8";
body {
  position: relative;
  margin: 0;
  padding: 0;
  font-size: 100%;
  font-family: "Hiragino Sans W3", "Hiragino Kaku Gothic ProN", "ヒラギノ角ゴ ProN W3", "メイリオ", Meiryo, "ＭＳ Ｐゴシック", "MS PGothic", sans-serif;
  background: #f7f7f7;
}

main {
  padding: 50px;
  width: 100%;
  box-sizing: border-box;
}
main h1 {
  display: inline-block;
  margin-bottom: 40px;
  font-size: 1.6rem;
  color: #222;
  border-bottom: 2px solid #222;
}
main section {
  margin-bottom: 40px;
  padding: 0 0 40px;
  border-bottom: 1px solid #222;
}
main section h2 {
  margin-bottom: 10px;
  font-size: 1.2rem;
}
main section p {
  margin-bottom: 20px;
}

#btn_menu1 {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  width: 100px;
  height: 100px;
  box-sizing: border-box;
  background-color: #222;
  transition: background-color 0.3s ease;
}
#btn_menu1::before {
  position: absolute;
  top: calc(50% - 1px);
  left: 25%;
  display: block;
  content: "";
  width: 50%;
  height: 2px;
  background: #f7f7f7;
  opacity: 0;
  transform: rotate(45deg);
  transition: opacity 0.3s ease;
}
#btn_menu1 span {
  display: block;
  position: absolute;
  top: 25%;
  left: 25%;
  width: 50%;
  height: 50%;
  opacity: 1;
  transition: opacity 0.3s ease;
}
#btn_menu1 span::before,
#btn_menu1 span span, #btn_menu1 span::after {
  position: absolute;
  top: 12%;
  left: 0;
  display: block;
  content: "";
  width: 100%;
  height: 2px;
  background: #f7f7f7;
  transition: opacity 0.3s ease;
}
#btn_menu1 span span {
  top: calc(50% - 1px);
}
#btn_menu1 span::after {
  top: auto;
  bottom: 12%;
}
#btn_menu1::after {
  position: absolute;
  top: calc(50% - 1px);
  left: 25%;
  display: block;
  content: "";
  width: 50%;
  height: 2px;
  background: #f7f7f7;
  opacity: 0;
  transform: rotate(-45deg);
  transition: opacity 0.3s ease;
}
#btn_menu1:hover {
  background-color: #555;
}
#btn_menu1.active::before {
  opacity: 1;
}
#btn_menu1.active span {
  opacity: 0;
}
#btn_menu1.active::after {
  opacity: 1;
}

#btn_menu2 {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  width: 100px;
  height: 100px;
  box-sizing: border-box;
  background-color: #222;
  transition: background-color 0.3s ease;
}
#btn_menu2::before {
  position: absolute;
  top: calc(50% - 10px);
  left: 0;
  display: block;
  content: "MENU";
  color: #f7f7f7;
  width: 100%;
  font-size: 1rem;
  text-align: center;
  opacity: 1;
  transition: opacity 0.3s ease;
}
#btn_menu2::after {
  position: absolute;
  top: calc(50% - 10px);
  left: 0;
  display: block;
  content: "CLOSE";
  color: #f7f7f7;
  width: 100%;
  font-size: 1rem;
  text-align: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}
#btn_menu2:hover {
  background-color: #555;
}
#btn_menu2.active::before {
  opacity: 0;
}
#btn_menu2.active::after {
  opacity: 1;
}

#btn_menu3 {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  width: 100px;
  height: 100px;
  box-sizing: border-box;
  background-color: #222;
  transition: background-color 0.3s ease;
}
#btn_menu3::before {
  position: absolute;
  top: 35%;
  left: 25%;
  display: block;
  content: "";
  width: 50%;
  height: 2px;
  background: #f7f7f7;
  transform: rotate(0deg);
  transition: transform 0.3s ease, top 0.1s ease;
}
#btn_menu3::after {
  position: absolute;
  bottom: 35%;
  left: 25%;
  display: block;
  content: "";
  width: 50%;
  height: 2px;
  background: #f7f7f7;
  transform: rotate(0deg);
  transition: transform 0.3s ease, bottom 0.1s ease;
}
#btn_menu3:hover {
  background-color: #555;
}
#btn_menu3.active::before {
  top: calc(50% - 1px);
  transform: rotate(315deg);
}
#btn_menu3.active::after {
  bottom: calc(50% - 1px);
  transform: rotate(-315deg);
}

#btn_menu4 {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  width: 100px;
  height: 100px;
  box-sizing: border-box;
  background-color: #222;
  transition: background-color 0.3s ease;
}
#btn_menu4::before {
  position: absolute;
  top: 30%;
  left: 25%;
  display: block;
  content: "";
  width: 50%;
  height: 2px;
  background: #f7f7f7;
  transform: rotate(0deg);
  transition: transform 0.3s ease, top 0.1s ease;
}
#btn_menu4::after {
  position: absolute;
  bottom: 30%;
  left: 25%;
  display: block;
  content: "";
  width: 50%;
  height: 2px;
  background: #f7f7f7;
  transform: rotate(0deg);
  transition: transform 0.3s ease, bottom 0.1s ease;
}
#btn_menu4 span {
  position: absolute;
  top: calc(50% - 1px);
  left: 25%;
  display: block;
  overflow: hidden;
  width: 50%;
  height: 2px;
  color: #f7f7f7;
  opacity: 1;
  background-color: #f7f7f7;
  transition: opacity 0.1s ease;
}
#btn_menu4:hover {
  background-color: #555;
}
#btn_menu4.active span {
  opacity: 0;
}
#btn_menu4.active::before {
  top: calc(50% - 1px);
  transform: rotate(315deg);
}
#btn_menu4.active::after {
  bottom: calc(50% - 1px);
  transform: rotate(-315deg);
}

#btn_menu5 {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  width: 100px;
  height: 100px;
  box-sizing: border-box;
  background-color: #222;
  transition: background-color 0.3s ease;
}
#btn_menu5::before {
  position: absolute;
  top: 30%;
  left: 25%;
  display: block;
  content: "";
  width: 50%;
  height: 2px;
  background: #f7f7f7;
  transform: rotate(0deg);
  transition: transform 0.3s ease, top 0.1s ease;
}
#btn_menu5::after {
  position: absolute;
  bottom: 30%;
  left: 25%;
  display: block;
  content: "";
  width: 50%;
  height: 2px;
  background: #f7f7f7;
  transform: rotate(0deg);
  transition: transform 0.3s ease, bottom 0.1s ease;
}
#btn_menu5 span {
  position: absolute;
  top: calc(50% - 12px);
  display: block;
  width: 100%;
  text-align: center;
  font-size: 1rem;
  color: #f7f7f7;
  opacity: 1;
  transition: opacity 0.1s ease;
}
#btn_menu5:hover {
  background-color: #555;
}
#btn_menu5.active span {
  opacity: 0;
}
#btn_menu5.active::before {
  top: calc(50% - 1px);
  transform: rotate(315deg);
}
#btn_menu5.active::after {
  bottom: calc(50% - 1px);
  transform: rotate(-315deg);
}

#btn_menu6 {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  width: 100px;
  height: 100px;
  box-sizing: border-box;
  background-color: #222;
  transition: background-color 0.3s ease;
}
#btn_menu6::before {
  position: absolute;
  top: 22%;
  left: 30%;
  display: block;
  content: "";
  width: 40%;
  height: 2px;
  background: #f7f7f7;
  transform: rotate(0deg);
  transition: transform 0.3s ease, top 0.1s ease;
}
#btn_menu6::after {
  position: absolute;
  top: 48%;
  left: 30%;
  display: block;
  content: "";
  width: 40%;
  height: 2px;
  background: #f7f7f7;
  transform: rotate(0deg);
  transition: transform 0.3s ease, bottom 0.1s ease;
}
#btn_menu6 span:nth-child(1) {
  position: absolute;
  top: 35%;
  left: 30%;
  display: block;
  width: 40%;
  height: 2px;
  opacity: 1;
  background-color: #f7f7f7;
  transition: opacity 0.1s ease;
}
#btn_menu6 span:nth-child(2) {
  position: absolute;
  bottom: 15%;
  left: 0;
  display: block;
  width: 100%;
  text-align: center;
  color: #f7f7f7;
  opacity: 1;
  transition: opacity 0.3s ease;
}
#btn_menu6 span:nth-child(3) {
  position: absolute;
  bottom: 15%;
  left: 0;
  display: block;
  width: 100%;
  text-align: center;
  color: #f7f7f7;
  opacity: 0;
  transition: opacity 0.3s ease;
}
#btn_menu6:hover {
  background-color: #555;
}
#btn_menu6.active span:nth-child(1) {
  opacity: 0;
}
#btn_menu6.active span:nth-child(2) {
  opacity: 0;
}
#btn_menu6.active span:nth-child(3) {
  opacity: 1;
}
#btn_menu6.active::before {
  top: calc(35% - 1px);
  transform: rotate(315deg);
}
#btn_menu6.active::after {
  top: calc(35% - 1px);
  transform: rotate(-315deg);
}

#btn_menu7 {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  width: 100px;
  height: 100px;
  box-sizing: border-box;
  background-color: #222;
  transition: background-color 0.3s ease;
}
#btn_menu7::before {
  position: absolute;
  top: 38%;
  left: 25%;
  display: block;
  content: "";
  width: 50%;
  height: 2px;
  background: #f7f7f7;
  transform: rotate(0deg);
  transition: transform 0.3s ease, top 0.1s ease;
}
#btn_menu7::after {
  position: absolute;
  bottom: 38%;
  left: 25%;
  display: block;
  content: "";
  width: 35%;
  height: 2px;
  background: #f7f7f7;
  transform: rotate(0deg);
  transition: transform 0.3s ease, bottom 0.1s ease, width 0.3s ease;
}
#btn_menu7:hover {
  background-color: #555;
}
#btn_menu7.active::before {
  top: calc(50% - 1px);
  transform: rotate(135deg);
}
#btn_menu7.active::after {
  width: 50%;
  bottom: calc(50% - 1px);
  transform: rotate(-135deg);
}

#btn_menu8 {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  width: 100px;
  height: 100px;
  box-sizing: border-box;
  background-color: #222;
  transition: background-color 0.3s ease;
}
#btn_menu8::before {
  position: absolute;
  top: 30%;
  left: 25%;
  display: block;
  content: "";
  width: 50%;
  height: 2px;
  background: #f7f7f7;
  transform: rotate(0deg);
  transition: transform 0.3s ease, top 0.1s ease;
}
#btn_menu8 span {
  position: absolute;
  top: calc(50% - 1px);
  left: 25%;
  display: block;
  overflow: hidden;
  width: 35%;
  height: 2px;
  color: #f7f7f7;
  opacity: 1;
  background-color: #f7f7f7;
  transition: opacity 0.1s ease;
}
#btn_menu8::after {
  position: absolute;
  bottom: 30%;
  left: 25%;
  display: block;
  content: "";
  width: 20%;
  height: 2px;
  background: #f7f7f7;
  transform: rotate(0deg);
  transition: transform 0.3s ease, bottom 0.1s ease, width 0.3s ease;
}
#btn_menu8:hover {
  background-color: #555;
}
#btn_menu8.active::before {
  top: calc(50% - 1px);
  transform: rotate(135deg);
}
#btn_menu8.active span {
  opacity: 0;
}
#btn_menu8.active::after {
  width: 50%;
  bottom: calc(50% - 1px);
  transform: rotate(-135deg);
}