.button_history:hover{
  background-color: #F4D03F !important;
}
.button_history.active{
  background-color: #F4D03F !important;
  color: black;
  padding:14px;
}
.button_history{
  font-size: 20px;
  font-weight: bold;
  border-top-left-radius: 10px;
  background-color: white;
  border-top-right-radius: 10px;
  border: solid 2px #F4D03F;
}
.tabs a{
  width: 135px;
  border-bottom: none;
  color: #555555;
}
.tabs.is-centered ul{
  align-items: flex-end;
}
.tabs li{
  margin-right: 2px;
  border-bottom:solid 4.5px #F4D03F;
}
.timeLine{
  position:relative;
  background-color: rgba(0,0,0,0.4);
  width: 1200px;
  height: 640px;
  /*px だと: 1524*/
  margin: 0 auto;
  box-shadow: 0 0 30px black;
  border-radius: 5px;
  /*border: solid 3px #333333;*/
  overflow-y:hidden;
  max-width: 100%;
}
.timeLineTitle{
  padding-top: 4px;
  font-weight: bold;
  margin: 0 auto;
  color: white;
  padding-left:10px;
  font-size: 23px;
  margin-bottom: 15px;
  text-shadow: 1px 1px 1px #000;
}
.timelineMain{
  position:relative;
  width: 100%;
}
.yearList{
  display: flex;
  justify-content: space-between;
  font-weight: bold;
  position: absolute;
  bottom: 15px;
  width: 100%;
  color: white;
  padding: 0 80px;
}
.timeLineInner{
  position:relative;
  height: 640px;
}
.lineBar{
  background-color:yellow;
  position: relative;
  border-radius: 10px;
  font-size: 8px;
  margin-bottom: 5px;
  text-align: center;
  vertical-align: middle;
  padding-bottom: 10px;
  padding-top:10px;
}
.lineBar:hover{
  background-color: #f6d405;
  cursor: pointer;
}
.endLine:after{
  content: "";
    display: block;
    position: absolute;
    width: 4px;
    background-color:white;
    height: 20px;
    left: 0;
    top: -8px;
}
.endLine:before{
    content: "";
    display: block;
    padding-right: 3px;
    position: absolute;
    width: 4px;
    height: 20px;
    background-color:white;
    right: 0;
    top: -8px;
}

.endLine{
  height: 4px;
  background-color: white;
  margin-top: 10px;
  bottom: 50px;
  margin-left: 20px;
  width: calc(100% - 40px);
  position:absolute;
  /*あまり好まないやり方*/
  padding-top: 0px !important;
  padding-bottom: 0px !important;
}
.chapterBackground{
  position: absolute;
  top: 0;
  /*filter: grayscale(100%);*/
  opacity: 0.4;
  width: 100%;
  left: 0;
  height: 100%;
  z-index: -1;
}
/*このままでいいのか？ / あまり好まないやり方*/
.endLine:hover{
  background-color: black !important;
  cursor: default !important;
}
.button{
  background-color: white;
  border-color:#dbdbdb;
  margin: 0 auto;
}
.history-title{
  font-weight: bold;
  font-size: 20px;
  padding-bottom: 5px;
}
.history-text{
  text-indent: 20px;
  font-size: 17px;
  padding-bottom: 10px
}
.explainTitle{
  font-weight: bold;
  font-size: 30px;
  font-family: "Noto Sans JP";
  margin: 0 auto;
  padding-top:20px;
  width: 7%;
  text-align:center;
  color: black;
  border-bottom: solid 5px #ffa000;
}
.explainText{
  text-align: center;
  padding-top: 10px;
  font-family: "Noto Sans JP";
  font-size: 20px;
  padding-bottom: 5px;
  border-bottom:solid 2px #DDDCD7
}
.modal-card-title{
  font-weight:bold;
}
.modal{
  z-index: 100000;
}
.chapterTitle{
  font-size:25px;
  text-align: center;
  font-weight:bold;
  padding-bottom: 5px;
  padding-top: 64px;
  color: black;
}

.start_history{
  font-weight: bold;
  font-size: 40px;
  font-family: "Noto Sans JP";
  margin: 0 auto;
  margin-top: 20px;
  width: 50%;
  color: white;
}

.description_history{
  font-size: 14px;
  font-family: "Noto Sans JP";
  margin: 0 auto;
  width: 50%;
  color: white;
}
.top_history{
  height: 230px;
  background-color: black;
}
.squea{
  margin-top:-27px;
  width: 100%;
  height: 5px;
  background: rgb(27,46,133);
  background: linear-gradient(37deg, rgba(27,46,133,1) 0%, rgba(194,0,4,1) 24%, rgba(255,218,85,1) 69%, rgba(77,163,135,1) 100%);
}
body{
  width: 100%;
}