/* ============================================================
   FAQ — /faq/ ページ専用
   4 カテゴリ × タブ切替 + アコーディオン（details/summary）
   ============================================================ */

/* タブナビ */
.faq-tabs {
	display: flex;
	flex-wrap: wrap;
	gap: 0.6rem;
	list-style: none;
	margin: 0 0 2.5rem;
	padding: 0;
	justify-content: center;
}
.faq-tabs__item { margin: 0; }
.faq-tab {
	min-width: 7rem;
	padding: 0.7rem 1.4rem;
	background: transparent;
	border: 1px solid var(--c-line);
	color: var(--c-ink);
	cursor: pointer;
	font-family: inherit;
	display: inline-flex;
	flex-direction: column;
	align-items: center;
	gap: 0.25em;
	transition: background var(--dur-1) var(--ease), color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}
.faq-tab:hover { border-color: var(--c-brand); }
.faq-tab[aria-selected="true"] {
	background: var(--c-brand);
	color: #fff;
	border-color: var(--c-brand);
}
.faq-tab__ja {
	font-size: clamp(0.85rem, 0.3vw + 0.78rem, 0.95rem);
	font-weight: 600;
	letter-spacing: 0.06em;
}
.faq-tab__en {
	font-family: var(--ff-display);
	font-size: clamp(0.6rem, 0.1vw + 0.58rem, 0.66rem);
	letter-spacing: 0.18em;
	opacity: 0.7;
	text-transform: uppercase;
}

/* パネル */
.faq-panels { margin-top: 0; }
.faq-panel { display: block; }
.faq-panel[hidden] { display: none; }

/* Q&A item (details/summary) */
.faq-item {
	border-bottom: 1px solid var(--c-line);
	padding: 1.1rem 0.5rem;
}
.faq-item:first-child { border-top: 1px solid var(--c-line); }
.faq-item__q {
	display: grid;
	grid-template-columns: auto 1fr auto;
	gap: 0.8rem;
	align-items: start;
	cursor: pointer;
	font-weight: 600;
	list-style: none;
	line-height: 1.55;
}
.faq-item__q::-webkit-details-marker { display: none; }
.faq-item__q-icon {
	font-family: var(--ff-display);
	font-weight: 700;
	color: var(--c-brand);
	font-size: 1.1em;
	letter-spacing: 0.05em;
	line-height: 1.3;
}
.faq-item__q-text {
	color: var(--c-ink);
	padding-top: 0.05em;
	font-size: clamp(0.92rem, 0.35vw + 0.85rem, 1rem);
}
.faq-item__chevron {
	width: 12px; height: 12px;
	border-right: 2px solid var(--c-mute);
	border-bottom: 2px solid var(--c-mute);
	transform: rotate(45deg);
	transition: transform var(--dur-1) var(--ease);
	margin-top: 0.45em;
	margin-right: 0.2em;
}
.faq-item[open] .faq-item__chevron {
	transform: rotate(-135deg);
	border-color: var(--c-brand);
}
.faq-item__a {
	display: grid;
	grid-template-columns: auto 1fr;
	gap: 0.8rem;
	margin-top: 1rem;
	padding-top: 1rem;
	border-top: 1px dashed var(--c-line);
}
.faq-item__a-icon {
	font-family: var(--ff-display);
	font-weight: 700;
	color: var(--c-mute);
	font-size: 1.1em;
	letter-spacing: 0.05em;
	line-height: 1.3;
}
.faq-item__a-text {
	color: var(--c-ink-soft);
	line-height: 1.85;
	font-size: clamp(0.85rem, 0.3vw + 0.78rem, 0.92rem);
}
.faq-item__a-text a {
	color: var(--c-brand);
	text-decoration: underline;
	text-underline-offset: 0.15em;
	word-break: break-all;
}
.faq-item__a-text a:hover { text-decoration: none; }

/* SP */
@media (max-width: 560px) {
	.faq-tab { min-width: 5.5rem; padding: 0.55rem 0.9rem; }
	.faq-tabs { gap: 0.4rem; }
	.faq-item { padding: 1rem 0.25rem; }
	.faq-item__q { gap: 0.55rem; }
	.faq-item__a { gap: 0.55rem; }
}