@charset "UTF-8";
#container {
    overflow: hidden;
}
#contents .event_list_area{
    background-color: #fff;
}
/* イベントページ用バウンドアニメーション */
@keyframes zoomInUp {
  0% {
    opacity: 0;
    transform: translateY(24px) scale(0.94) translateZ(0);
  }
  45% {
    opacity: 1;
    transform: translateY(-12px) scale(1.14) translateZ(0);
  }
  65% {
    transform: translateY(6px) scale(0.99) translateZ(0);
  }
  82% {
    transform: translateY(-2px) scale(1.02) translateZ(0);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1) translateZ(0);
  }
}

.event_list_area {
  backface-visibility: hidden;
  transform-origin: center;
  will-change: transform, opacity;
  opacity: 0;
  transform: translateY(24px) scale(0.94);
}

.event_list_area.animate-in {
  animation: zoomInUp 760ms cubic-bezier(.22,.9,.27,1) 1 forwards;
}

@media (prefers-reduced-motion: reduce) {
  .event_list_area {
    animation: none;
    transform: none;
    opacity: 1;
  }
  
  .event_list_area.animate-in {
    animation: none;
    transform: none;
    opacity: 1;
  }
}


/* アコーディオンアニメーション */
.open_botn {
  cursor: pointer;
  user-select: none;
  position: relative;
  padding: 1rem 0;
  border-bottom: 1px solid #000;
  margin: 0 auto;
  width: 50%;
}

.open_botn p {
  margin: 0;
  position: relative;
  padding-right: 2rem;
  text-align: center;
}

.open_botn strong {
  display: inline-block;
  transition: all 0.3s ease;
}

/* 矢印アイコン（+） */
.open_botn::before,
.open_botn::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0;
  width: 12px;
  height: 2px;
  background-color: #000;
  border-radius: 2px;
  transform-origin: center;
  transition: transform 0.3s ease;
}

.open_botn::before {
  transform: translateY(-50%) rotate(0deg);
}

.open_botn::after {
  transform: translateY(-50%) rotate(90deg);
}

/* 開いた状態（-） */
.open_botn.open::before {
  transform: translateY(-50%) rotate(0deg);
}

.open_botn.open::after {
  transform: translateY(-50%) rotate(0deg);
}

/* アコーディオンコンテンツ（次の要素） */
.open_botn + * {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out, opacity 0.4s ease-out, margin 0.4s ease-out, padding 0.4s ease-out;
  margin-top: 0;
  margin-bottom: 0;
  padding-top: 0;
  padding-bottom: 0;
}

.open_botn.open + * {
  max-height: 2000px;
  opacity: 1;
  margin-top: 1rem;
  margin-bottom: 1rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
  transition: max-height 0.4s ease-in, opacity 0.4s ease-in, margin 0.4s ease-in, padding 0.4s ease-in;
}

/* event_txt内のopen_botn以降のすべての要素を対象にする */
.event_txt .open_botn ~ * {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out, opacity 0.4s ease-out, margin 0.4s ease-out, padding 0.4s ease-out;
  margin-top: 0;
  margin-bottom: 0;
  padding-top: 0;
  padding-bottom: 0;
}

.event_txt .open_botn.open ~ * {
  max-height: 2000px;
  opacity: 1;
  margin-top: 1rem;
  margin-bottom: 1rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
  transition: max-height 0.4s ease-in, opacity 0.4s ease-in, margin 0.4s ease-in, padding 0.4s ease-in;
}

/* レスポンシブ対応 */
@media screen and (max-width: 600px) {
  .open_botn {
    padding: 0.8rem 0;
    width: 80%;
  }
  
  .open_botn p {
    font-size: 14px;
  }
  
  .open_botn::before,
  .open_botn::after {
    width: 10px;
  }
}