html {
  background: rgb(242, 233, 207);
  color: rgb(50, 50, 50);
  font-family: "toppan-bunkyu-gothic-pr6n", serif;
  font-feature-settings: "palt";
  word-break: break-word;
  text-align: center;
  font-size: 1rem;
}
@media screen and (min-width: 640px) {
  html {
    font-size: 0.9rem;
  }
}
  



/* body */
body{
  overflow-x: hidden;
}

.flex-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-end;
  align-content: center;
  padding-top: 100px;
  padding-bottom: 50px;
}

@media screen and (min-width: 640px) {
  .flex-container {
    padding-right: 1vw;
    padding-left: 1vw;
  }
}

.one-container {
  /* margin: 5px; */
  margin: -20px;
  margin-bottom: 0px;
  position: relative;
  transition: .2s cubic-bezier(0.45, 0, 0.55, 1);
  /* background-color: aqua; */
}

.one-container:hover {
  z-index: 100;
}

.tree_box {
  width: 180px;
  height: auto;
  margin: 10px;
  margin-top: 30px;
  /* 220px */
  cursor: pointer;
}

.tree_img {
  max-width: 100%;
  cursor: pointer;
  /* background-color: aqua; */
}

.tree_background {
  /* display: none; */
  position: absolute;
  width: 0px;
  height: auto;
  top: 10px;
  left: -31px;
  right: 31px;
  bottom: -10px;
  margin: auto;
  z-index: -10;
  transition: .2s cubic-bezier(0.45, 0, 0.55, 1);
}

.hover_area:hover+.tree_background {
  display: block;
  width: 260px;
  /*   pointer-events: none; */
}

.hidden {
  display: none;
}

/* 森に戻る（file_upload）*/

.return_box {
  margin: auto;
  margin-top: 35vh;
  margin-bottom: 25vh;
}


.display_message {
  font-size: 1.4rem;
}

.display_message_sub {
  font-size: 1rem;
  margin-bottom: 27px;
}

.return_forest {
  padding: 20px;
  border-radius: 50vh;
  background: rgb(50, 50, 50);
  color: rgb(240, 240, 240);
  transition: .2s cubic-bezier(0.45, 0, 0.55, 1);
  text-align: center;
  letter-spacing: 0.2rem;
  list-style-type: none;
  pointer-events: all;
}

.return_forest:hover {
  background: rgb(100, 100, 100);
}