/**
 * Global FAQ design system.
 * Aligns all project FAQ blocks to the finalized homepage style.
 *
 * GOVERNANCE — WIDTH
 * Default max-width targets broad marketing pages (homepage, legacy snapshots).
 * Calculator routes (`body.rtg-calculator-page`): max-width inherits shared shell `--rtg-cps-shell-max`
 * so FAQ aligns with `_rtg-calculator-system.css` + page token overrides (rule block below).
 * FAQ behaviour / accordion DOM is unchanged — width only.
 */

:root {
	--rtg-faq-chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M2.5 4.5L6 8L9.5 4.5' stroke='%23475569' stroke-width='1.75' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
	--rtg-faq-chevron-open: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M2.5 4.5L6 8L9.5 4.5' stroke='%232b6cb0' stroke-width='1.75' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

.rtg-faq-section,
.rtg-faq-block,
.rtg-faq-section--unified {
	max-width: 1200px;
	margin: 0 auto;
	padding: 2.2rem clamp(16px, 4vw, 24px) 2.35rem;
	box-sizing: border-box;
	width: 100%;
	position: relative;
}

.rtg-faq-section::before,
.rtg-faq-block::before,
.rtg-faq-section--unified::before {
	content: "";
	position: absolute;
	inset: 0;
	border-radius: 1rem;
	background: radial-gradient(120% 80% at 50% 0%, rgba(43, 108, 176, 0.06) 0%, transparent 55%),
		linear-gradient(180deg, #f8fafc 0%, #ffffff 40%, #ffffff 100%);
	pointer-events: none;
	z-index: 0;
}

.rtg-faq-heading,
.rtg-faq-section--unified > .rtg-faq-heading {
	position: relative;
	z-index: 1;
	margin: 0 auto 1.75rem;
	padding-bottom: 1rem;
	max-width: 40rem;
	text-align: center;
	font-size: clamp(1.4rem, 2.8vw, 1.85rem);
	font-weight: 700;
	letter-spacing: -0.03em;
	color: #0f172a;
	line-height: 1.2;
}

.rtg-faq-heading::after,
.rtg-faq-section--unified > .rtg-faq-heading::after {
	content: "";
	display: block;
	width: 3rem;
	height: 4px;
	margin: 1rem auto 0;
	border-radius: 999px;
	background: linear-gradient(90deg, #2b6cb0, #63b3ed);
}

.rtg-faq-accordion,
.rtg-faq-block,
.rtg-faq-section--unified .rtg-faq-accordion {
	position: relative;
	z-index: 1;
	display: flex;
	flex-direction: column;
	gap: 0.75rem;
}

.rtg-faq-item,
.rtg-faq-block__item {
	border: 1px solid #e7edf5;
	border-radius: 14px;
	background: #ffffff;
	box-shadow: 0 2px 10px rgba(15, 23, 42, 0.055);
	overflow: hidden;
	transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.rtg-faq-item:hover,
.rtg-faq-block__item:hover {
	border-color: #cbd5e1;
	box-shadow: 0 8px 20px rgba(15, 23, 42, 0.09);
}

.rtg-faq-item[open],
.rtg-faq-block__item[open] {
	border-color: #90cdf4;
	box-shadow: 0 10px 28px rgba(43, 108, 176, 0.12), 0 0 0 1px rgba(43, 108, 176, 0.08);
}

.rtg-faq-summary,
.rtg-faq-block__item > summary {
	list-style: none;
	display: flex;
	align-items: center;
	cursor: pointer;
	padding: 1.15rem 3.5rem 1.15rem 1.35rem;
	font-size: clamp(1rem, 1.6vw, 1.08rem);
	font-weight: 600;
	color: #0f172a;
	position: relative;
	line-height: 1.45;
	user-select: none;
	transition: background 0.18s ease, color 0.18s ease;
}

.rtg-faq-summary::-webkit-details-marker,
.rtg-faq-block__item > summary::-webkit-details-marker {
	display: none;
}

.rtg-faq-summary::marker,
.rtg-faq-block__item > summary::marker {
	content: "";
	font-size: 0;
}

.rtg-faq-summary::before,
.rtg-faq-block__item > summary::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0;
	bottom: 0;
	width: 4px;
	background: linear-gradient(180deg, #2b6cb0, #4299e1);
	opacity: 0;
	transition: opacity 0.2s ease;
}

.rtg-faq-item[open] .rtg-faq-summary::before,
.rtg-faq-block__item[open] > summary::before {
	opacity: 1;
}

.rtg-faq-summary:hover,
.rtg-faq-block__item > summary:hover {
	background: linear-gradient(90deg, rgba(43, 108, 176, 0.05) 0%, transparent 55%);
}

.rtg-faq-item[open] .rtg-faq-summary,
.rtg-faq-block__item[open] > summary {
	background: linear-gradient(90deg, rgba(43, 108, 176, 0.06) 0%, transparent 60%);
	color: #1e3a5f;
}

.rtg-faq-summary:focus-visible,
.rtg-faq-block__item > summary:focus-visible {
	outline: 2px solid #2b6cb0;
	outline-offset: 2px;
}

.rtg-faq-summary::after,
.rtg-faq-block__item > summary::after {
	content: "";
	position: absolute;
	right: 1rem;
	top: 50%;
	width: 2.25rem;
	height: 2.25rem;
	margin-top: -1.125rem;
	border-radius: 50%;
	box-sizing: border-box;
	border: 1px solid #e2e8f0;
	background-color: #f1f5f9;
	background-image: var(--rtg-faq-chevron);
	background-repeat: no-repeat;
	background-position: center 52%;
	transform: rotate(0deg);
	transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.25s ease;
}

.rtg-faq-summary:hover::after,
.rtg-faq-block__item > summary:hover::after {
	background-color: #e2e8f0;
}

.rtg-faq-item[open] .rtg-faq-summary::after,
.rtg-faq-block__item[open] > summary::after {
	background-color: rgba(43, 108, 176, 0.15);
	background-image: var(--rtg-faq-chevron-open);
	transform: rotate(180deg);
	border-color: #90cdf4;
}

.rtg-faq-panel,
.rtg-faq-block__answer {
	padding: 0 1.35rem 1.25rem 1.35rem;
	color: #475569;
	font-size: 0.98rem;
	line-height: 1.7;
	border-top: 1px solid #eef3f8;
	background: linear-gradient(180deg, #fafbfc 0%, #ffffff 100%);
}

.rtg-faq-panel p,
.rtg-faq-block__answer p {
	margin: 0.85rem 0 0;
	max-width: none;
	width: 100%;
}

@media (max-width: 1024px) {
	.rtg-faq-section,
	.rtg-faq-block,
	.rtg-faq-section--unified {
		padding: 1.9rem clamp(16px, 4vw, 24px) 2rem;
	}
}

@media (max-width: 600px) {
	.rtg-faq-summary,
	.rtg-faq-block__item > summary {
		padding: 1rem 3rem 1rem 1.1rem;
		font-size: 0.95rem;
	}

	.rtg-faq-summary::after,
	.rtg-faq-block__item > summary::after {
		right: 0.65rem;
		width: 2rem;
		height: 2rem;
		margin-top: -1rem;
	}
}

/* Calculator routes — inherit shared shell lane (not global 1200px cap) */
body.rtg-calculator-page .rtg-faq-section,
body.rtg-calculator-page .rtg-faq-section--unified,
body.rtg-calculator-page .rtg-faq-block {
	max-width: var(--rtg-cps-shell-max, min(1040px, calc(100% - 2rem)));
}