.dialog_overlay *,
*::before,
*::after {
  box-sizing: border-box;
}

/* ダイアログオーバーレイ */
.dialog_overlay {
  position: absolute;
  left: 0;
  top: 0;
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0ms ease 300ms, visibility 0ms ease 300ms; /* 非表示は他アニメーションを待って行う */
}
.dialog_overlay[data-shown="true"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: none; /* 表示は即座に行う */
}

/* ダイアロググループ */
.dialog_overlay > .dialogs {
  position: relative;
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 300ms ease, visibility 300ms ease;
}
.dialog_overlay > .dialogs[data-shown="true"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* ダイアログコンテナ */
.dialog_overlay > .dialogs > .dialog_container {
  position: absolute;
  left: 0;
  top: 0;
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;  
  pointer-events: none;
  transition: opacity 0ms ease 300ms, visibility 0ms ease 300ms; /* 非表示は他アニメーションを待って行う */
}
.dialog_overlay > .dialogs > .dialog_container[data-shown="true"] {
  opacity: 1;
  visibility: visible;
  transition: none; /* 表示は即座に行う */
}

/* ダイアログ */
.dialog_overlay > .dialogs > .dialog_container > .dialog {
  --dialog-background-color: var(--color-gray);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  margin: auto;
  padding: 10px;
  border: 1px solid var(--color-black);
  background-color: var(--dialog-background-color);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 300ms ease, visibility 300ms ease;
}
.dialog_overlay > .dialogs > .dialog_container > .dialog[data-shown="true"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.dialog_overlay > .dialogs > .dialog_container > .dialog > .header {
  display: flex;
  flex-direction: row;
  align-items: center;
  width: 100%;
  height: 60px;
  margin-bottom: 5px;
}
.dialog_overlay > .dialogs > .dialog_container > .dialog > .header > .title {
  display: inline-block;
  font-size: 24px;
  font-weight: bold;
  margin-left: 20px;
  flex: 1;
}
.dialog_overlay > .dialogs > .dialog_container > .dialog > .header > .close {
  display: inline-block;
  font-size: 24px;
  font-weight: bold;
  padding: 0 10px;
  cursor: pointer;
}

/* SP */
@media screen and (max-width: 768px) {
  .dialog_overlay > .dialogs > .dialog_container > .dialog > .header > .title {
    font-size: 18px;
    margin-left: 5px;
  }
}