/* =========================================================
   faq.css — よくあるご質問 Display Runtime v1
   正本: faq.html（URL /faq/）
   スコープ: 全セレクタを .faq 配下へ限定（汎用 class の global／他 Runtime 波及回避）。
   共通基盤（:root / body / .container / reset）は common.css 既存のため取り込まない。
   アコーディオン開閉は assets/js/faq-accordion.js（.faq__item.is-open）で駆動。
   RULE-01/03/04: 面・DOM を増減しない忠実 Runtime 化。
   ========================================================= */

/* FAQ layout */
.faq .faq-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  padding: 64px 0 80px;
  max-width: 1100px;
  margin: 0 auto;
}
.faq .faq-cat {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  align-self: start;
}
.faq .faq-cat__title {
  font-family: var(--font-jp);
  font-size: 13px;
  font-weight: 700;
  color: var(--blue-600);
  letter-spacing: 0.12em;
  margin-bottom: 12px;
}
.faq .faq-cat ul { border-left: 2px solid var(--gray-200); }
.faq .faq-cat li a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--text);
  border-left: 2px solid transparent;
  margin-left: -2px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.faq .faq-cat li a:hover,
.faq .faq-cat li a.is-current {
  border-color: var(--blue-600);
  color: var(--blue-600);
}

.faq .faq-group { margin-bottom: 48px; scroll-margin-top: 100px; }
.faq .faq-group__title {
  font-size: 22px;
  color: var(--navy-900);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--navy-900);
  margin-bottom: 16px;
}
.faq .faq__item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  background: var(--white);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.faq .faq__item:hover { border-color: var(--blue-400); }
.faq .faq__item.is-open { border-color: var(--blue-600); box-shadow: var(--shadow-sm); }
.faq .faq__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 700;
  color: var(--navy-900);
  cursor: pointer;
  width: 100%;
  text-align: left;
}
.faq .faq__q::before {
  content: "Q";
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: var(--blue-600);
  color: var(--white);
  font-family: var(--font-en);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 14px;
}
.faq .faq__q-text { flex: 1; line-height: 1.6; padding-top: 3px; }
.faq .faq__q-toggle {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  position: relative;
  margin-top: 3px;
}
.faq .faq__q-toggle::before, .faq .faq__q-toggle::after {
  content: "";
  position: absolute;
  background: var(--navy-900);
  transition: transform 0.2s var(--ease);
}
.faq .faq__q-toggle::before { top: 11px; left: 4px; right: 4px; height: 2px; }
.faq .faq__q-toggle::after { top: 4px; left: 11px; bottom: 4px; width: 2px; }
.faq .faq__item.is-open .faq__q-toggle::after { transform: scaleY(0); }

.faq .faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s var(--ease);
}
.faq .faq__item.is-open .faq__a { max-height: 400px; }
.faq .faq__a-inner {
  display: flex;
  gap: 14px;
  padding: 0 20px 20px 20px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.9;
}
.faq .faq__a-inner::before {
  content: "A";
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: var(--navy-900);
  color: var(--white);
  font-family: var(--font-en);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 14px;
}
.faq .faq__a-inner > div { flex: 1; padding-top: 3px; }

@media (max-width: 960px) {
  .faq .faq-layout { grid-template-columns: 1fr; gap: 24px; }
  .faq .faq-cat { position: static; }
  .faq .faq-cat ul { display: flex; flex-wrap: wrap; border-left: none; }
  .faq .faq-cat li a { border-left: none; border-bottom: 2px solid transparent; padding: 8px 14px; }
  .faq .faq-cat li a:hover, .faq .faq-cat li a.is-current { border-bottom-color: var(--blue-600); }
  .faq .page-hero__title { font-size: 26px; }
}