/* はずむアコーディオン（Bouncy Accordion）。開いた項目だけが上下から離れ、角が丸くなって浮き出る。
   ばねの動きは component.js が linear() の曲線にして --tb-ba-* に入れる。 */
.tb-bouncy-accordion {
  --tb-ba-bg: #ffffff;
  --tb-ba-fg: #0a0a0a;
  --tb-ba-muted: #737373;
  --tb-ba-line: rgba(0, 0, 0, 0.06);
  --tb-ba-row: 0.55s ease;
  --tb-ba-open: 0.58s ease;
  --tb-ba-close: 0.46s ease;
  --tb-ba-chevron: 0.42s ease;
  width: 100%;
}
.tb-bouncy-accordion__row {
  margin-top: 0;
  transition: margin-top var(--tb-ba-row);
}
.tb-bouncy-accordion__row.is-gap { margin-top: 12px; }
/* 区切りとして無彩色の細い線だけを持つ */
.tb-bouncy-accordion__item {
  overflow: hidden;
  background: var(--tb-ba-bg);
  color: var(--tb-ba-fg);
  border: 1px solid var(--tb-ba-line);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 0;
  transition: border-radius var(--tb-ba-row);
}
.tb-bouncy-accordion__item.is-start { border-top-left-radius: 28px; border-top-right-radius: 28px; }
.tb-bouncy-accordion__item.is-end { border-bottom-left-radius: 28px; border-bottom-right-radius: 28px; }
.tb-bouncy-accordion__item.is-disabled { opacity: 0.5; }
.tb-bouncy-accordion__trigger {
  display: flex;
  align-items: center;
  gap: 16px;
  box-sizing: border-box;
  width: 100%;
  min-height: 54px;
  padding: 0 20px;
  margin: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  outline: none;
  transition: background-color 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}
.tb-bouncy-accordion__trigger:focus-visible { background: color-mix(in oklab, var(--tb-ba-muted) 12%, transparent); }
.tb-bouncy-accordion__trigger:disabled { pointer-events: none; }
.tb-bouncy-accordion__icon { display: grid; place-items: center; width: 28px; height: 28px; flex-shrink: 0; color: var(--tb-ba-muted); }
.tb-bouncy-accordion__title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 15px;
  font-weight: 500;
}
.tb-bouncy-accordion__chevron {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--tb-ba-muted);
  transition: transform var(--tb-ba-chevron);
}
.tb-bouncy-accordion__chevron svg { width: 16px; height: 16px; }
.is-open > .tb-bouncy-accordion__trigger .tb-bouncy-accordion__chevron { transform: rotate(180deg); }
.tb-bouncy-accordion__content {
  height: 0;
  overflow: hidden;
  transition: height var(--tb-ba-close);
}
.is-open > .tb-bouncy-accordion__content { transition: height var(--tb-ba-open); }
.tb-bouncy-accordion__inner {
  padding: 0 20px 20px;
  opacity: 0;
  transition: opacity 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}
.is-open > .tb-bouncy-accordion__content > .tb-bouncy-accordion__inner { opacity: 1; }
.tb-bouncy-accordion__desc { margin: 0; font-size: 15px; line-height: 24px; color: var(--tb-ba-muted); }
@media (prefers-reduced-motion: reduce) {
  .tb-bouncy-accordion__row,
  .tb-bouncy-accordion__item,
  .tb-bouncy-accordion__chevron,
  .tb-bouncy-accordion__content,
  .is-open > .tb-bouncy-accordion__content,
  .tb-bouncy-accordion__inner { transition: none; }
}