/* ========================================
 * 用語ポップアップ
 * 本文の用語（細いヘアライン。開くと下から薄い面が満ちる）と、タップで開く解説。
 * 600px以下は画面下からのシート、それより広い画面は用語の近くの吹き出し。
 * 色はサイトのCSS変数を参照し、ダークモードは末尾で上書きする。
 * ======================================== */

/* ---- 本文中の用語 ----
 * 線：用語用の主色をそのまま使い、背景とのコントラスト3:1以上を保つ（WCAG 1.4.11）。
 *     リンク（青の実線下線）とは色・太さ・位置で区別する。
 * 面：マウスを乗せると8%、開いている間は12%（Material 3 のステートレイヤーの濃さ）。
 * 背景の1層目が面、2層目が線。面は background-size を0→100%に動かして下から満たす。 */
.f1nl-term.is-ready {
  --f1nl-term-accent: #087d76;
  --f1nl-term-rgb: 8, 125, 118;
  --f1nl-term-fill: rgba(var(--f1nl-term-rgb), 0.08);
  background-image:
    linear-gradient(var(--f1nl-term-fill), var(--f1nl-term-fill)),
    linear-gradient(var(--f1nl-term-accent), var(--f1nl-term-accent));
  background-repeat: no-repeat;
  background-position: 0 100%, 0 100%;
  background-size: 100% 0, 100% 1.5px;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
  padding: 0 1px 2px;
  border-radius: 2px 2px 0 0;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: background-size 0.18s cubic-bezier(0, 0, 0.2, 1);
}
.f1nl-term.is-ready:hover,
.f1nl-term.is-ready.is-open {
  background-size: 100% 100%, 100% 1.5px;
}
.f1nl-term.is-ready.is-open {
  --f1nl-term-fill: rgba(var(--f1nl-term-rgb), 0.12);
}
.f1nl-term.is-ready:focus-visible {
  outline: 2px solid var(--f1nl-term-accent);
  outline-offset: 2px;
}

/* ---- 解説（吹き出し・シート共通） ---- */
.f1nl-term-popup {
  --f1nl-term-accent: #087d76;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 98;
  box-sizing: border-box;
  display: grid;
  gap: 6px;
  width: min(340px, calc(100vw - 24px));
  padding: 14px 44px 14px 16px;
  border: 1px solid var(--f1nl-border-light, #ddd);
  border-top: 3px solid var(--f1nl-term-accent);
  border-radius: 10px;
  background: var(--f1nl-bg-card, #fdfdfd);
  color: var(--f1nl-text-body, #333);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.16);
  font-size: 14px;
  line-height: 1.7;
  text-align: left;
  animation: f1nl-term-fade 0.12s ease-out;
}
.f1nl-term-popup:focus {
  outline: none;
}
.f1nl-term-popup:focus-visible {
  outline: 2px solid var(--f1nl-term-accent);
  outline-offset: 2px;
}
.f1nl-term-popup .f1nl-term-popup__category {
  margin: 0;
  color: var(--f1nl-text-sub2, #666);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.4;
}
.f1nl-term-popup .f1nl-term-popup__title {
  margin: 0;
  color: var(--f1nl-term-accent);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
}
.f1nl-term-popup .f1nl-term-popup__summary {
  margin: 0;
}

/* 解説記事カード */
.f1nl-term-popup .f1nl-term-popup__link {
  display: grid;
  gap: 2px;
  min-height: 44px;
  margin-top: 4px;
  padding: 9px 12px;
  border: 1px solid var(--f1nl-border-light, #ddd);
  border-radius: 8px;
  background: var(--f1nl-bg-surface, #f5fafa);
  color: var(--f1nl-text-body, #333);
  text-decoration: none;
}
.f1nl-term-popup .f1nl-term-popup__link:hover {
  border-color: var(--f1nl-term-accent);
}
.f1nl-term-popup .f1nl-term-popup__link:focus-visible {
  outline: 2px solid var(--f1nl-term-accent);
  outline-offset: 2px;
}
.f1nl-term-popup .f1nl-term-popup__link-label {
  color: var(--f1nl-term-accent);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
}
.f1nl-term-popup .f1nl-term-popup__link-label::after {
  content: " →";
}
.f1nl-term-popup .f1nl-term-popup__link-title {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  font-size: 13px;
  line-height: 1.5;
}

/* 関連用語チップ */
.f1nl-term-popup .f1nl-term-popup__related {
  display: grid;
  gap: 6px;
  margin-top: 4px;
}
.f1nl-term-popup .f1nl-term-popup__related-label {
  color: var(--f1nl-text-sub2, #666);
  font-size: 11px;
  line-height: 1.4;
}
.f1nl-term-popup .f1nl-term-popup__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.f1nl-term-popup .f1nl-term-popup__chip {
  min-height: 36px;
  margin: 0;
  padding: 4px 12px;
  border: 1px solid var(--f1nl-border-light, #ddd);
  border-radius: 999px;
  background: var(--f1nl-bg-card, #fdfdfd);
  color: var(--f1nl-text-body, #333);
  font: inherit;
  font-size: 12px;
  line-height: 1.3;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  box-shadow: none;
}
.f1nl-term-popup .f1nl-term-popup__chip:hover {
  border-color: var(--f1nl-term-accent);
  color: var(--f1nl-term-accent);
}
.f1nl-term-popup .f1nl-term-popup__chip:focus-visible {
  outline: 2px solid var(--f1nl-term-accent);
  outline-offset: 2px;
}

/* 閉じるボタン */
.f1nl-term-popup .f1nl-term-popup__close {
  position: absolute;
  top: 2px;
  right: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--f1nl-text-sub2, #666);
  font: inherit;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  box-shadow: none;
}
.f1nl-term-popup .f1nl-term-popup__close:hover {
  color: var(--f1nl-term-accent);
}
.f1nl-term-popup .f1nl-term-popup__close:focus-visible {
  outline: 2px solid var(--f1nl-term-accent);
  outline-offset: -2px;
}

/* ---- 吹き出しの矢印（位置はJSが --f1nl-term-arrow-left で渡す） ---- */
.f1nl-term-popup .f1nl-term-popup__arrow {
  position: absolute;
  left: var(--f1nl-term-arrow-left, 24px);
  width: 12px;
  height: 12px;
  margin-left: -6px;
  background: inherit;
  border: 0;
  transform: rotate(45deg);
}
.f1nl-term-popup.is-below .f1nl-term-popup__arrow {
  top: -8px;
  border-top: 3px solid var(--f1nl-term-accent);
  border-left: 3px solid var(--f1nl-term-accent);
}
.f1nl-term-popup.is-above .f1nl-term-popup__arrow {
  bottom: -7px;
  border-right: 1px solid var(--f1nl-border-light, #ddd);
  border-bottom: 1px solid var(--f1nl-border-light, #ddd);
}
.f1nl-term-popup .f1nl-term-popup__handle {
  display: none;
}

/* ---- スマホ：画面下からのシート ---- */
.f1nl-term-popup-scrim {
  position: fixed;
  inset: 0;
  z-index: 1001;
  background: rgba(10, 22, 21, 0.3);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  animation: f1nl-term-fade 0.15s ease-out;
}
.f1nl-term-popup.is-sheet {
  position: fixed;
  top: auto;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1002;
  width: auto;
  max-width: 640px;
  max-height: 75vh;
  margin: 0 auto;
  overflow-y: auto;
  overscroll-behavior: contain;
  gap: 8px;
  padding: 8px 20px calc(20px + env(safe-area-inset-bottom, 0px));
  border: 0;
  border-top: 3px solid var(--f1nl-term-accent);
  border-radius: 16px 16px 0 0;
  box-shadow: 0 -6px 24px rgba(0, 0, 0, 0.18);
  font-size: 15px;
  transition: transform 0.18s ease-out;
  animation: f1nl-term-sheet-in 0.2s ease-out;
}
.f1nl-term-popup.is-sheet .f1nl-term-popup__arrow {
  display: none;
}
.f1nl-term-popup.is-sheet .f1nl-term-popup__handle {
  display: block;
  width: 44px;
  height: 5px;
  margin: 2px auto 6px;
  border-radius: 3px;
  background: var(--f1nl-border-light2, #ccc);
}
.f1nl-term-popup.is-sheet .f1nl-term-popup__title {
  padding-right: 32px;
  font-size: 17px;
}
.f1nl-term-popup.is-sheet .f1nl-term-popup__close {
  top: 10px;
  right: 8px;
  width: 44px;
  height: 44px;
}
.f1nl-term-popup.is-sheet .f1nl-term-popup__link-title {
  font-size: 14px;
}

@keyframes f1nl-term-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes f1nl-term-sheet-in {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  .f1nl-term.is-ready,
  .f1nl-term-popup,
  .f1nl-term-popup.is-sheet,
  .f1nl-term-popup-scrim {
    animation: none;
    transition: none;
  }
}

/* ---- ダークモード ---- */
html[data-theme="dark"] .f1nl-term.is-ready,
html[data-theme="dark"] .f1nl-term-popup {
  --f1nl-term-accent: #42d3c6;
  --f1nl-term-rgb: 66, 211, 198;
}
html[data-theme="dark"] .f1nl-term-popup {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
}
html[data-theme="dark"] .f1nl-term-popup-scrim {
  background: rgba(0, 0, 0, 0.5);
}
html[data-theme="dark"] .f1nl-term-popup .f1nl-term-popup__close {
  background: transparent;
  border: 0;
  color: var(--f1nl-text-sub2, #8a9a9a);
}
html[data-theme="dark"] .f1nl-term-popup .f1nl-term-popup__chip {
  background: transparent;
  border-color: var(--f1nl-border-light2, rgba(255, 255, 255, 0.15));
  color: var(--f1nl-text-body, #dce0e4);
}
html[data-theme="dark"] .f1nl-term-popup .f1nl-term-popup__close:hover,
html[data-theme="dark"] .f1nl-term-popup .f1nl-term-popup__chip:hover {
  color: var(--f1nl-term-accent);
}

/* ---- 非表示（各要素の display 指定より後に置いて優先させる） ---- */
.f1nl-term-popup[hidden],
.f1nl-term-popup [hidden],
.f1nl-term-popup-scrim[hidden] {
  display: none;
}