/**
 * Sauna Science page (/sauna-science/).
 *
 * Page-scoped under .twy-sauna-science-page so the editorial palette
 * + type tokens don't leak (mirrors heat-pumps.css / science.css).
 * Section blocks are ordered the same way they appear in
 * page-sauna-science.php (.ss-hero, .ss-thesis, .ss-numbers, .ss-how,
 * .ss-benefits, .ss-protocol, .ss-faq, .ss-cta).
 */

.twy-sauna-science-page {
	--ink: #14160F;
	--ink-2: #1d211a;
	--ink-3: #2a2f26;
	--cream: #f6fff2;
	--cream-2: #eaf6e2;
	--cream-3: #ddf0d0;
	--paper: #ffffff;
	--sage: #93db4c;
	--sage-2: #ffcf7a;
	--sage-deep: #d97a35;
	--clay: #93db4c;
	--clay-deep: #bde858;
	--stone: #8a8a7a;
	--stone-2: #6a6a5a;
	--line: rgba(20, 23, 15, 0.12);
	--line-strong: rgba(20, 23, 15, 0.22);

	--font-display: "DM Serif Display", "Cormorant Garamond", Georgia, serif;
	--font-body: "Inter", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
	--font-mono: "JetBrains Mono", ui-monospace, monospace;

	--ease-out: cubic-bezier(0.22, 1, 0.36, 1);

	background: var(--cream);
	color: var(--ink);
	font-family: var(--font-body);
	font-size: 15px;
	line-height: 1.55;
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
}

.twy-sauna-science-page * { box-sizing: border-box; }
.twy-sauna-science-page a { color: inherit; text-decoration: none; }
.twy-sauna-science-page button {
	font-family: inherit;
	cursor: pointer;
	border: none;
	background: none;
	color: inherit;
}
.twy-sauna-science-page h1,
.twy-sauna-science-page h2,
.twy-sauna-science-page h3,
.twy-sauna-science-page h4 { margin: 0; font-weight: 400; color: inherit; }
.twy-sauna-science-page p { margin: 0; }
.twy-sauna-science-page ul, .twy-sauna-science-page ol { list-style: none; margin: 0; padding: 0; }
.twy-sauna-science-page dl { margin: 0; }
.twy-sauna-science-page em { font-style: italic; color: var(--clay); }

.twy-sauna-science-page .wrap {
	width: 100%;
	max-width: 1440px;
	margin: 0 auto;
	padding: 0 24px;
}
@media (min-width: 768px)  { .twy-sauna-science-page .wrap { padding: 0 48px; } }
@media (min-width: 1200px) { .twy-sauna-science-page .wrap { padding: 0 64px; } }

html:has(.twy-sauna-science-page) { scroll-behavior: smooth; }

/* ============================================
   Shared primitives
   ============================================ */
.twy-sauna-science-page .ss-eyebrow {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.18em;
	text-transform: uppercase;
	color: var(--stone-2);
}
.twy-sauna-science-page .ss-eyebrow--cream { color: rgba(243, 241, 232, 0.78); }

.twy-sauna-science-page .ss-section-head {
	display: grid;
	grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
	gap: 48px;
	margin-bottom: 56px;
	align-items: end;
}
@media (max-width: 900px) {
	.twy-sauna-science-page .ss-section-head { grid-template-columns: 1fr; gap: 16px; }
}
.twy-sauna-science-page .ss-section-head h2 {
	font-family: var(--font-display);
	font-size: clamp(36px, 5vw, 60px);
	line-height: 1.05;
	letter-spacing: -0.01em;
	margin-top: 12px;
}
.twy-sauna-science-page .ss-section-head p {
	font-size: 16px;
	color: var(--ink-3);
	max-width: 480px;
}

/* ============================================
   1. HERO — dark, photo-bg
   ============================================ */
.twy-sauna-science-page .ss-hero {
	position: relative;
	background: var(--ink);
	color: var(--cream);
	padding: 180px 0 110px;
	overflow: hidden;
}
.twy-sauna-science-page .ss-hero[style*="--twy-ss-hero-bg"] {
	background-image:
		linear-gradient(180deg, rgba(20, 23, 15, 0.55) 0%, rgba(20, 23, 15, 0.72) 60%, rgba(20, 23, 15, 0.88) 100%),
		var(--twy-ss-hero-bg);
	background-size: cover, cover;
	background-position: center, center;
	background-repeat: no-repeat, no-repeat;
}
.twy-sauna-science-page .ss-hero-glow {
	position: absolute;
	inset: 0;
	background:
		radial-gradient(60% 50% at 80% 30%, rgba(226, 106, 58, 0.18), transparent 70%),
		radial-gradient(50% 60% at 10% 80%, rgba(212, 224, 168, 0.13), transparent 70%);
	pointer-events: none;
}
.twy-sauna-science-page .ss-hero-inner {
	position: relative;
	z-index: 1;
}
.twy-sauna-science-page .ss-hero-grid {
	display: grid;
	grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
	gap: 56px;
	align-items: end;
	margin-top: 30px;
}
@media (max-width: 900px) {
	.twy-sauna-science-page .ss-hero { padding: 140px 0 80px; }
	.twy-sauna-science-page .ss-hero-grid { grid-template-columns: 1fr; gap: 28px; }
}
.twy-sauna-science-page .ss-hero h1 {
	font-family: var(--font-display);
	font-size: clamp(44px, 6.5vw, 84px);
	line-height: 1.02;
	letter-spacing: -0.02em;
	color: var(--cream);
}
.twy-sauna-science-page .ss-hero h1 em { color: var(--clay); font-style: italic; }
.twy-sauna-science-page .ss-hero-side p {
	font-size: 16px;
	line-height: 1.6;
	color: rgba(243, 241, 232, 0.82);
	max-width: 420px;
	margin-bottom: 24px;
}
.twy-sauna-science-page .ss-hero-badge {
	display: inline-flex;
	align-items: center;
	gap: 12px;
	padding: 10px 16px;
	border-radius: 999px;
	background: rgba(243, 241, 232, 0.08);
	border: 1px solid rgba(243, 241, 232, 0.2);
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.14em;
	text-transform: uppercase;
}
.twy-sauna-science-page .ss-hero-badge .dot {
	font-family: var(--font-display);
	font-size: 18px;
	color: var(--clay);
	line-height: 1;
}

/* ============================================
   3. THESIS
   ============================================ */
.twy-sauna-science-page .ss-thesis {
	background: var(--paper);
	padding: 110px 0;
}
.twy-sauna-science-page .ss-thesis-statement {
	font-family: var(--font-display);
	font-size: clamp(32px, 4.5vw, 54px);
	line-height: 1.15;
	letter-spacing: -0.01em;
	margin-top: 16px;
	margin-bottom: 32px;
	max-width: 920px;
}
.twy-sauna-science-page .ss-thesis-body {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 36px;
	max-width: 920px;
}
@media (max-width: 900px) {
	.twy-sauna-science-page .ss-thesis { padding: 80px 0; }
	.twy-sauna-science-page .ss-thesis-body { grid-template-columns: 1fr; }
}
.twy-sauna-science-page .ss-thesis-body p {
	font-size: 16px;
	line-height: 1.65;
	color: var(--ink-3);
}

/* ============================================
   4. NUMBERS
   ============================================ */
.twy-sauna-science-page .ss-numbers {
	background: var(--cream);
	padding: 110px 0;
}
.twy-sauna-science-page .ss-stats-grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 16px;
	margin-bottom: 64px;
}
@media (max-width: 1000px) {
	.twy-sauna-science-page .ss-stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
	.twy-sauna-science-page .ss-stats-grid { grid-template-columns: 1fr; }
	.twy-sauna-science-page .ss-numbers { padding: 80px 0; }
}
.twy-sauna-science-page .ss-stat {
	background: var(--paper);
	border: 1px solid var(--line);
	border-radius: 14px;
	padding: 24px;
	display: flex;
	flex-direction: column;
	gap: 12px;
}
.twy-sauna-science-page .ss-stat .stat {
	font-family: var(--font-display);
	font-size: clamp(40px, 4vw, 52px);
	line-height: 0.95;
	color: var(--clay);
}
.twy-sauna-science-page .ss-stat .label {
	font-size: 14px;
	color: var(--ink-3);
	line-height: 1.45;
}
.twy-sauna-science-page .ss-stat .src {
	font-family: var(--font-mono);
	font-size: 10px;
	letter-spacing: 0.06em;
	color: var(--stone-2);
	margin-top: auto;
}

/* Compare cards (1×/wk vs 4–7×/wk) — same shape as the heat-pumps
   compare block. Two-column grid; the "is-target" card carries a
   sage ring to draw the eye. */
.twy-sauna-science-page .ss-compare {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 18px;
	margin-bottom: 24px;
}
@media (max-width: 900px) {
	.twy-sauna-science-page .ss-compare { grid-template-columns: 1fr; }
}
.twy-sauna-science-page .ss-compare-card {
	position: relative;
	background: var(--paper);
	border: 1px solid var(--line);
	border-radius: 18px;
	padding: 32px 28px;
	display: flex;
	flex-direction: column;
	gap: 18px;
}
.twy-sauna-science-page .ss-compare-card.is-target { border-color: var(--sage-deep); }
.twy-sauna-science-page .ss-compare-card .ring {
	position: absolute;
	inset: -2px;
	border-radius: 18px;
	border: 2px solid var(--sage-deep);
	pointer-events: none;
}
.twy-sauna-science-page .ss-compare-card .tag {
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--stone-2);
}
.twy-sauna-science-page .ss-compare-card .ratio {
	display: flex; align-items: baseline; gap: 14px;
	font-family: var(--font-display);
	font-size: clamp(32px, 4vw, 42px);
	line-height: 1;
	color: var(--ink);
}
.twy-sauna-science-page .ss-compare-card .ratio .arr { font-size: 24px; color: var(--stone-2); }
.twy-sauna-science-page .ss-compare-card .ratio .small { font-size: clamp(20px, 2.4vw, 26px); }
.twy-sauna-science-page .ss-compare-card .ratio .italic { font-style: italic; }
.twy-sauna-science-page .ss-compare-card .ratio .sage { color: var(--sage-deep); }
.twy-sauna-science-page .ss-compare-card .ratio .unit {
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.1em;
	margin-left: 4px;
	color: var(--stone-2);
	text-transform: uppercase;
	font-style: normal;
}
.twy-sauna-science-page .ss-compare-card .lede {
	font-size: 15px;
	color: var(--ink-3);
}
.twy-sauna-science-page .ss-compare-list {
	display: flex; flex-direction: column; gap: 10px;
}
.twy-sauna-science-page .ss-compare-list li {
	display: flex; gap: 10px; align-items: flex-start;
	font-size: 14px; line-height: 1.5;
	color: var(--ink-3);
}
.twy-sauna-science-page .ss-bullet {
	width: 6px; height: 6px;
	margin-top: 8px;
	border-radius: 999px;
	background: var(--stone-2);
	flex-shrink: 0;
}
.twy-sauna-science-page .ss-check {
	color: var(--sage-deep);
	flex-shrink: 0;
	margin-top: 1px;
}
.twy-sauna-science-page .ss-fineprint {
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.04em;
	color: var(--stone-2);
}

/* ============================================
   5. HOW IT WORKS — 4-step
   ============================================ */
.twy-sauna-science-page .ss-how {
	background: var(--ink);
	color: var(--cream);
	padding: 120px 0;
}
.twy-sauna-science-page .ss-how .ss-section-head h2 { color: var(--cream); }
.twy-sauna-science-page .ss-how .ss-section-head p { color: rgba(243, 241, 232, 0.74); }
.twy-sauna-science-page .ss-how .ss-eyebrow { color: rgba(243, 241, 232, 0.6); }
.twy-sauna-science-page .ss-how-grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 18px;
}
@media (max-width: 1000px) {
	.twy-sauna-science-page .ss-how-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
	.twy-sauna-science-page .ss-how-grid { grid-template-columns: 1fr; }
	.twy-sauna-science-page .ss-how { padding: 80px 0; }
}
.twy-sauna-science-page .ss-step {
	background: rgba(243, 241, 232, 0.04);
	border: 1px solid rgba(243, 241, 232, 0.12);
	border-radius: 14px;
	padding: 28px;
	display: flex;
	flex-direction: column;
	gap: 14px;
}
.twy-sauna-science-page .ss-step-num {
	font-family: var(--font-mono);
	font-size: 12px;
	letter-spacing: 0.18em;
	color: var(--clay);
}
.twy-sauna-science-page .ss-step-title {
	font-family: var(--font-display);
	font-size: 22px;
	line-height: 1.2;
	color: var(--cream);
}
.twy-sauna-science-page .ss-step p {
	font-size: 14px;
	line-height: 1.55;
	color: rgba(243, 241, 232, 0.78);
}

/* ============================================
   6. BENEFITS — 6-cell grid
   ============================================ */
.twy-sauna-science-page .ss-benefits {
	background: var(--paper);
	padding: 110px 0;
}
.twy-sauna-science-page .ss-benefits-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 18px;
}
@media (max-width: 1000px) {
	.twy-sauna-science-page .ss-benefits-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
	.twy-sauna-science-page .ss-benefits-grid { grid-template-columns: 1fr; }
	.twy-sauna-science-page .ss-benefits { padding: 80px 0; }
}
.twy-sauna-science-page .ss-benefit {
	background: var(--cream);
	border: 1px solid var(--line);
	border-radius: 14px;
	padding: 28px;
	display: flex;
	flex-direction: column;
	gap: 14px;
}
.twy-sauna-science-page .ss-benefit-tag {
	display: inline-flex;
	width: max-content;
	padding: 4px 10px;
	border-radius: 999px;
	background: var(--sage);
	color: var(--ink);
	font-family: var(--font-mono);
	font-size: 10px;
	font-weight: 600;
	letter-spacing: 0.1em;
	text-transform: uppercase;
}
.twy-sauna-science-page .ss-benefit-title {
	font-family: var(--font-display);
	font-size: 22px;
	line-height: 1.2;
	color: var(--ink);
}
.twy-sauna-science-page .ss-benefit p {
	font-size: 14px;
	line-height: 1.55;
	color: var(--ink-3);
}

/* ============================================
   7. PROTOCOL — description list
   ============================================ */
.twy-sauna-science-page .ss-protocol {
	background: var(--cream);
	padding: 110px 0;
}
.twy-sauna-science-page .ss-protocol-list {
	max-width: 900px;
	margin: 0 auto;
	border-top: 1px solid var(--line);
}
.twy-sauna-science-page .ss-protocol-row {
	display: grid;
	grid-template-columns: 200px 1fr;
	gap: 32px;
	padding: 24px 0;
	border-bottom: 1px solid var(--line);
}
@media (max-width: 700px) {
	.twy-sauna-science-page .ss-protocol-row { grid-template-columns: 1fr; gap: 6px; }
	.twy-sauna-science-page .ss-protocol { padding: 80px 0; }
}
.twy-sauna-science-page .ss-protocol-row dt {
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--stone-2);
	padding-top: 4px;
}
.twy-sauna-science-page .ss-protocol-row dd {
	margin: 0;
	font-size: 16px;
	line-height: 1.55;
	color: var(--ink-3);
}

/* ============================================
   8. FAQ
   ============================================ */
.twy-sauna-science-page .ss-faq {
	background: var(--paper);
	padding: 110px 0;
}
.twy-sauna-science-page .ss-faq-list {
	max-width: 920px;
	margin: 0 auto;
	border-top: 1px solid var(--line);
}
.twy-sauna-science-page .ss-faq-item {
	border-bottom: 1px solid var(--line);
}
.twy-sauna-science-page .ss-faq-item summary {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 20px 0;
	cursor: pointer;
	gap: 24px;
	list-style: none;
}
.twy-sauna-science-page .ss-faq-item summary::-webkit-details-marker { display: none; }
.twy-sauna-science-page .ss-faq-item summary > span:first-child {
	font-family: var(--font-display);
	font-size: 19px;
	line-height: 1.3;
	color: var(--ink);
}
.twy-sauna-science-page .ss-faq-icon {
	font-family: var(--font-mono);
	font-size: 22px;
	color: var(--clay);
	transition: transform 0.2s var(--ease-out);
}
.twy-sauna-science-page .ss-faq-item[open] .ss-faq-icon { transform: rotate(45deg); }
.twy-sauna-science-page .ss-faq-item p {
	padding: 0 0 24px;
	font-size: 15px;
	line-height: 1.6;
	color: var(--ink-3);
	max-width: 760px;
}
@media (max-width: 700px) {
	.twy-sauna-science-page .ss-faq { padding: 80px 0; }
}

/* ============================================
   9. CTA
   ============================================ */
.twy-sauna-science-page .ss-cta {
	background: var(--ink);
	color: var(--cream);
	padding: 110px 0;
	text-align: center;
}
.twy-sauna-science-page .ss-cta-inner {
	max-width: 720px;
	margin: 0 auto;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 20px;
}
.twy-sauna-science-page .ss-cta h2 {
	font-family: var(--font-display);
	font-size: clamp(34px, 4.5vw, 56px);
	line-height: 1.1;
	letter-spacing: -0.01em;
	color: var(--cream);
}
.twy-sauna-science-page .ss-cta h2 em { color: var(--clay); font-style: italic; }
.twy-sauna-science-page .ss-cta p {
	font-size: 16px;
	color: rgba(243, 241, 232, 0.78);
	max-width: 560px;
}
.twy-sauna-science-page .ss-cta-actions {
	display: flex;
	gap: 14px;
	flex-wrap: wrap;
	justify-content: center;
	margin-top: 12px;
}
.twy-sauna-science-page .ss-cta .btn-ghost {
	color: var(--cream);
	border-color: rgba(243, 241, 232, 0.3);
}
@media (max-width: 700px) {
	.twy-sauna-science-page .ss-cta { padding: 80px 0; }
}