body{
    background: linear-gradient(to bottom, #2F241D)
}
.event-section{
    background: linear-gradient(#F0E2C2,#E0D2B2);
}

.section-heading {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.8rem;
    color: #000; 
    margin-bottom: 25px;
    padding-bottom: 10px;
    position: relative;
    border-bottom: 2px solid rgba(50, 79, 139, 0.1);
    text-align: left;
}

.section-heading::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 80px;
    height: 4px;
    background: rgba(47, 36, 29,0.5);
    border-radius: 2px;
}

.detail-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.detail-label {
    width: 6em;
    padding: 4px 12px;
    background: rgba(47, 36, 29, 0.1);
    color: #000;
    border: 1px solid rgba(47, 36, 29, 0.3);
    border-radius: 5px;
    font-weight: 700;
    font-size: 1.2rem;
    text-align: center;
}

.details {
	transition: .3s;
	overflow: hidden;
	margin-top: -10px;
	padding-bottom: 20px;
	&:last-of-type {
		margin-bottom: 0;
	}
}
.details[open] {
	margin-top: 0;
	padding-bottom: 10px;
} 
.details-summary {
	display: block;
	padding: 15px;
    transition: .3s;
	transform: translateY(10px);
	background-color: #2F241D;
	font-size: 20px;
	font-weight: bold;
	color: #fff;
	&:hover {
		cursor: pointer;
	}
}
.details-summary::-webkit-details-marker {
	display: none;
}
.details[open] .details-summary {
	transform: translateY(0);
}
.details-content {
	padding: 20px;
	background-color: #F0E2C2;
	border-bottom: 2px solid #2F241D;
	border-left: 2px solid #2F241D;
	border-right: 2px solid #2F241D;
  gap:20px;
}
/*タブのスタイル*/

.tab_item {
  display:inline-block;
  height: 50px;
  line-height: 40px;
  border-top: 3px solid #000000;
  border-bottom: 3px solid #000000;
  background-color: #F0E2C2;
  font-size: 16px;
  text-align: center;
  color: #565656;
  display: block;
  font-weight: bold;
  margin-bottom:3px;
  border-radius :20px;
}
@media screen and (min-width: 580px) {
    .tab_item {
         display: inline-block;
         min-width: calc(70%/3);
         padding:0 10px;
         border: 0;
         border-radius :10px;
         line-height:50px;
         margin-bottom:10px;
      }

}
.tab_item:hover {
  opacity: 0.75;
}

/*ラジオボタンを全て消す*/
input[name="tab_item"] {
  display: none;
}

/*タブ切り替えの中身のスタイル*/
.tab_content {
  display: none;
  clear: both;
  overflow: hidden;
}


/*選択されているタブのコンテンツのみを表示*/
#about:checked ~ #about_content,
#hint:checked ~ #hint_content,
#extra:checked ~ #extra_content {
  display: block;
}

/*選択されているタブのスタイルを変える*/
.tabs input:checked + .tab_item {
  background-color: #B89A63;
  color: #fff;
}
.details2-summary{
  font-size:19px;
}
.details-content > details {
    margin-bottom: 20px;
}

.details-content > details:last-child {
    margin-bottom: 0;
}