body {
  background-image: url("../../img/gallery/bg.jpg");
}
.main_area {
  margin: 45px auto 50px;
  user-select: none;
}
.main01_area {
  width: 96%;
  margin-top: 5%;
  user-select: none;
}
ul#slider {
  width: 83%;
  margin: 0 auto 30px;
}
.slide-item img {
  display: block;
  width: 100%;
  cursor: pointer;
  user-select: none;
}
ul#thumbnail-list {
  width: 83%;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  user-select: none;
}
ul#thumbnail-list li {
  cursor: pointer;
  max-width: 150px;
  user-select: none;
  background: rgba(15, 15, 15, 1.00);
  margin-bottom: 2%;
  /* margin-right: 2%;*/
}
ul#thumbnail-list li.dammy {
	  cursor:auto;
background-color: transparent;
}
ul#thumbnail-list li img {
  width: 100%;
  opacity: 0.5;
  transition: 0.1S;
  pointer-events: none;
  user-select: none;
}
ul#thumbnail-list li.thumbnail-current img {
  opacity: 1;
}
ul#thumbnail-list li img:hover {
  opacity: 1;
}
.slide-arrow {
  position: absolute;
  top: 0;
  bottom: 0;
  margin: auto;
  cursor: pointer;
}
.prev-arrow {
  left: 0;
  z-index: 10;
  margin-left: -50px;
}
.next-arrow {
  right: 0;
  margin-right: -50px;
}
.btf_deco03 {
  bottom: 0;
  right: 0;
  width: 7%;
  margin-right: -4%;
  margin-bottom: -1%;
}
#modal_area {
  display: none;
  position: fixed;
  z-index: 200000;
  top: 0;
  left: 0;
  width: 100%;
  max-width: 100% !important;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
}
#modal_window {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 100% !important;
  height: 100%;
}
#modal_area img {
  width: 60%;
  max-width: 1280px;
  pointer-events: none;
  user-select: none;
}
#youtube_close {
  line-height: 0.3em;
  position: absolute;
  top: 0;
  right: 0;
  font-size: 10vw;
  padding: 4%;
  color: rgba(255, 255, 255, 1.00);
  cursor: pointer;
  user-select: none;
}
#modal_area #youtube_close img {
  width: 100%;
}
@media screen and (max-width: 800px) {
  ul#thumbnail-list {
    justify-content: space-between;
  }
  ul#thumbnail-list li {
    margin-right: 0%;
  }
  .main01_area {
    width: 85%;
  }
  .slide-arrow {
    width: 5%;
  }
  .slide-arrow img {
    width: 100%;
  }
  .prev-arrow {
    margin-left: -7%;
  }
  .next-arrow {
    margin-right: -7%;
  }
  ul#thumbnail-list li {
    max-width: 48%;
    margin-bottom: 5%;
  }
  .btf_deco03 {
    bottom: 0;
    right: 0;
    width: 15%;
    margin-right: 6%;
    margin-bottom: 0%;
  }
}