/* ============================================================
   ISOLIERGLAS ONLINE — sections.css
   Phase 2 section styles. Depends on: variables.css, main.css.
   Cascade: this file loads AFTER main.css, so any override here wins.
   ============================================================ */


/* ============================================================
   SHARED SECTION UTILITIES
   ============================================================ */
.ig-section-eyebrow {
	font-family: var(--ig-font-mono);
	font-size: 11px;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--ig-brass-deep);
	font-weight: 500;
	margin-bottom: 12px;
}
.ig-section-eyebrow-on-ink {
	color: var(--ig-brass);
}

.ig-section-title {
	font-size: clamp(1.7rem, 2.8vw, 2.4rem);
	font-weight: 700;
	letter-spacing: -0.025em;
	line-height: 1.1;
	color: var(--ig-ink);
}

.ig-section-sub {
	font-size: 15px;
	color: var(--ig-text-muted);
	max-width: 580px;
	line-height: 1.6;
}
.ig-section-sub-right {
	text-align: right;
	max-width: 380px;
}


/* ============================================================
   1. PRESETS — 4 chip grid on cream alt-bg
   ============================================================ */
.ig-presets {
	background: var(--ig-paper-2);
	padding: 60px 32px;
	border-top: 1px solid var(--ig-ink-line);
	border-bottom: 1px solid var(--ig-ink-line);
}
.ig-presets-inner {
	max-width: var(--ig-max);
	margin: 0 auto;
}
.ig-presets-header {
	display: flex;
	align-items: flex-end;
	justify-content: space-between;
	gap: 40px;
	margin-bottom: 32px;
}

.ig-chip-grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 14px;
}
.ig-chip {
	display: block;
	padding: 20px 22px;
	background: var(--ig-card);
	border: 1px solid var(--ig-ink-line);
	border-radius: var(--ig-r-lg);
	transition: transform var(--ig-t-base), border-color var(--ig-t-base),
				box-shadow var(--ig-t-base), background var(--ig-t-base);
	text-align: left;
	position: relative;
	cursor: pointer;
	color: inherit;
}
.ig-chip:hover {
	border-color: var(--ig-ink);
	transform: translateY(-3px);
	box-shadow: var(--ig-sh-md);
}
.ig-chip:focus-visible {
	outline: 2px solid var(--ig-brass);
	outline-offset: 3px;
}

.ig-chip-code {
	font-family: var(--ig-font-mono);
	font-size: 13px;
	font-weight: 600;
	color: var(--ig-brass-deep);
	letter-spacing: 0.05em;
	margin-bottom: 10px;
}
.ig-chip-title {
	font-size: 15px;
	font-weight: 600;
	color: var(--ig-ink);
	margin-bottom: 4px;
	letter-spacing: -0.01em;
}
.ig-chip-desc {
	font-size: 12px;
	color: var(--ig-text-muted);
	line-height: 1.45;
}
.ig-chip-arrow {
	position: absolute;
	top: 22px;
	right: 22px;
	color: var(--ig-text-subtle);
	transition: transform var(--ig-t-fast), color var(--ig-t-fast);
}
.ig-chip:hover .ig-chip-arrow {
	transform: translate(3px, -3px);
	color: var(--ig-brass);
}


/* ============================================================
   2. PERFORMANCE BAND — dark anthracite stat strip
   ============================================================ */
.ig-perf-band {
	background: var(--ig-ink);
	color: var(--ig-on-ink);
	padding: 70px 32px;
}
.ig-perf-inner {
	max-width: var(--ig-max);
	margin: 0 auto;
	display: grid;
	grid-template-columns: 1.3fr repeat(4, 1fr);
	gap: 40px;
	align-items: center;
}
.ig-perf-lead {
	border-right: 1px solid var(--ig-on-ink-line);
	padding-right: 40px;
}
.ig-perf-lead .ig-section-eyebrow {
	color: var(--ig-brass);
}
.ig-perf-headline {
	font-size: 22px;
	font-weight: 600;
	line-height: 1.3;
	letter-spacing: -0.02em;
	margin-top: 10px;
	color: var(--ig-on-ink);
}

.ig-perf-stat-label {
	font-family: var(--ig-font-mono);
	font-size: 10px;
	letter-spacing: 0.10em;
	text-transform: uppercase;
	color: rgba(240, 238, 233, 0.50);
	margin-bottom: 12px;
}
.ig-perf-stat-value {
	font-size: 38px;
	font-weight: 700;
	letter-spacing: -0.035em;
	line-height: 1;
	color: var(--ig-on-ink);
}
.ig-perf-stat-value small {
	font-size: 14px;
	font-weight: 500;
	color: rgba(240, 238, 233, 0.60);
	margin-left: 2px;
}
.ig-perf-stat-desc {
	font-size: 12px;
	color: rgba(240, 238, 233, 0.55);
	margin-top: 6px;
	line-height: 1.4;
}


/* ============================================================
   3. USE CASES — 4 photo tiles
   ============================================================ */
.ig-use-cases {
	padding: 100px 32px;
	max-width: var(--ig-max);
	margin: 0 auto;
}
.ig-uc-header {
	text-align: center;
	margin-bottom: 56px;
}
.ig-uc-header .ig-section-title {
	max-width: 720px;
	margin: 10px auto 16px;
}
.ig-uc-header .ig-section-sub {
	max-width: 580px;
	margin: 0 auto;
	text-align: center;
}
.ig-uc-grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 16px;
}
.ig-uc-tile {
	position: relative;
	aspect-ratio: 3 / 4;
	border-radius: var(--ig-r-lg);
	overflow: hidden;
	cursor: pointer;
	background: var(--ig-ink);
	display: block;
	transition: transform var(--ig-t-base);
}
.ig-uc-tile:focus-visible {
	outline: 2px solid var(--ig-brass);
	outline-offset: 3px;
}
.ig-uc-tile img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	transition: transform 700ms cubic-bezier(.4, 0, .2, 1);
}
.ig-uc-tile-placeholder {
	width: 100%;
	height: 100%;
	background: linear-gradient(135deg, var(--ig-ink-soft) 0%, var(--ig-ink) 100%);
}
.ig-uc-tile:hover img {
	transform: scale(1.05);
}
.ig-uc-tile::after {
	content: "";
	position: absolute;
	inset: 0;
	background: linear-gradient(180deg, transparent 30%, rgba(26, 29, 35, 0.80) 100%);
	z-index: 1;
}
.ig-uc-tile:hover {
	transform: translateY(-4px);
}
.ig-uc-label {
	position: absolute;
	left: 22px;
	right: 22px;
	bottom: 22px;
	z-index: 2;
	color: var(--ig-on-ink);
}
.ig-uc-label-code {
	font-family: var(--ig-font-mono);
	font-size: 10px;
	letter-spacing: 0.14em;
	color: var(--ig-brass);
	text-transform: uppercase;
	margin-bottom: 8px;
	display: block;
	font-weight: 500;
}
.ig-uc-label-name {
	font-size: 22px;
	font-weight: 700;
	letter-spacing: -0.02em;
	line-height: 1.15;
	display: block;
	margin-bottom: 12px;
}
.ig-uc-label-link {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-family: var(--ig-font-mono);
	font-size: 10px;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: rgba(240, 238, 233, 0.65);
	transition: color var(--ig-t-fast), gap var(--ig-t-fast);
}
.ig-uc-tile:hover .ig-uc-label-link {
	color: var(--ig-brass);
	gap: 10px;
}


/* ============================================================
   4. ENERGY — split section with before/after stats
   ============================================================ */
.ig-energy {
	background: var(--ig-paper-2);
	padding: 90px 32px;
	border-top: 1px solid var(--ig-ink-line);
}
.ig-energy-inner {
	max-width: var(--ig-max);
	margin: 0 auto;
	display: grid;
	grid-template-columns: 0.9fr 1.1fr;
	gap: 80px;
	align-items: center;
}
.ig-energy-left .ig-section-title {
	margin-top: 12px;
	margin-bottom: 20px;
}
.ig-energy-left p {
	color: var(--ig-text-muted);
	font-size: 16px;
	line-height: 1.7;
	margin-bottom: 18px;
}

.ig-energy-tags {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin-top: 32px;
}
.ig-tag {
	font-family: var(--ig-font-mono);
	font-size: 11px;
	letter-spacing: 0.05em;
	color: var(--ig-ink);
	padding: 7px 12px;
	background: var(--ig-card);
	border: 1px solid var(--ig-ink-line);
	border-radius: var(--ig-r-sm);
}

.ig-energy-visual {
	display: flex;
	flex-direction: column;
	gap: 24px;
}
.ig-energy-photo {
	position: relative;
	border-radius: var(--ig-r-xl);
	overflow: hidden;
	box-shadow: var(--ig-sh-md);
	border: 1px solid var(--ig-ink-line);
	height: 340px;
	background: linear-gradient(135deg, var(--ig-ink-soft) 0%, var(--ig-ink) 100%);
}
.ig-energy-photo img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.ig-energy-stats {
	display: grid;
	grid-template-columns: 1fr auto 1fr auto;
	align-items: center;
	gap: 18px;
	background: var(--ig-card);
	border: 1px solid var(--ig-ink-line);
	border-radius: var(--ig-r-lg);
	padding: 28px 30px;
	box-shadow: var(--ig-sh-sm);
}
.ig-estat {
	text-align: left;
}
.ig-estat-eyebrow {
	font-family: var(--ig-font-mono);
	font-size: 10px;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--ig-text-subtle);
	margin-bottom: 6px;
}
.ig-estat-value {
	font-size: 38px;
	font-weight: 700;
	line-height: 1;
	letter-spacing: -0.035em;
	color: var(--ig-ink);
}
.ig-estat-poor { color: var(--ig-stat-poor); opacity: 0.85; }
.ig-estat-best { color: var(--ig-stat-best); }
.ig-estat-unit {
	font-family: var(--ig-font-mono);
	font-size: 11px;
	color: var(--ig-text-muted);
	margin-top: 4px;
}
.ig-estat-arrow {
	font-size: 26px;
	color: var(--ig-brass);
	font-weight: 300;
	line-height: 1;
}
.ig-estat-highlight {
	position: relative;
	isolation: isolate;
}
.ig-estat-highlight::before {
	content: "";
	position: absolute;
	top: -8px;
	left: -10px;
	right: -10px;
	bottom: -8px;
	background: var(--ig-brass-soft);
	border-radius: var(--ig-r-md);
	z-index: -1;
}
.ig-estat-saving {
	padding-left: 20px;
	border-left: 1px dashed var(--ig-ink-line);
	text-align: right;
}
.ig-estat-saving-val {
	font-size: 26px;
	font-weight: 700;
	color: var(--ig-brass-deep);
	letter-spacing: -0.025em;
	line-height: 1;
}
.ig-estat-saving-val small {
	font-size: 14px;
	font-weight: 600;
	margin-left: 1px;
}
.ig-estat-saving-label {
	font-family: var(--ig-font-mono);
	font-size: 10px;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--ig-text-muted);
	margin-top: 6px;
}


/* ============================================================
   5. FAQ — accordion
   ============================================================ */
.ig-faq {
	padding: 100px 32px;
	background: var(--ig-paper-2);
	border-top: 1px solid var(--ig-ink-line);
}
.ig-faq-inner {
	max-width: 880px;
	margin: 0 auto;
}
.ig-faq-header {
	text-align: center;
	margin-bottom: 50px;
}
.ig-faq-header .ig-section-title {
	margin-top: 10px;
}

.ig-faq-list {
	display: flex;
	flex-direction: column;
}
.ig-faq-item {
	border-bottom: 1px solid var(--ig-ink-line);
}
.ig-faq-q {
	width: 100%;
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 24px;
	padding: 28px 0;
	background: transparent;
	border: none;
	cursor: pointer;
	text-align: left;
	font-family: var(--ig-font);
	transition: color var(--ig-t-fast);
}
.ig-faq-q:focus-visible {
	outline: 2px solid var(--ig-brass);
	outline-offset: 4px;
	border-radius: var(--ig-r-sm);
}
.ig-faq-q-text {
	font-size: 17px;
	font-weight: 600;
	color: var(--ig-ink);
	letter-spacing: -0.01em;
	line-height: 1.4;
}
.ig-faq-icon {
	width: 32px;
	height: 32px;
	border: 1.5px solid var(--ig-ink-line);
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	color: var(--ig-ink);
	flex-shrink: 0;
	font-size: 18px;
	font-weight: 300;
	transition: background var(--ig-t-fast), color var(--ig-t-fast),
				border-color var(--ig-t-fast), transform var(--ig-t-fast);
}
.ig-faq-item:hover .ig-faq-icon {
	background: var(--ig-ink);
	color: var(--ig-brass);
	border-color: var(--ig-ink);
}
.ig-faq-q[aria-expanded="true"] .ig-faq-icon {
	background: var(--ig-ink);
	color: var(--ig-brass);
	border-color: var(--ig-ink);
	transform: rotate(45deg);
}

.ig-faq-a {
	padding-bottom: 28px;
	padding-right: 56px;
}
.ig-faq-a p {
	font-size: 15px;
	color: var(--ig-text-muted);
	line-height: 1.7;
	max-width: 720px;
}
.ig-faq-a a {
	color: var(--ig-brass-deep);
	text-decoration: underline;
	text-underline-offset: 3px;
}


/* ============================================================
   6. QUOTE CTA — dark anthracite outro
   ============================================================ */
.ig-quote-cta {
	padding: 100px 32px;
	background: var(--ig-ink);
	color: var(--ig-on-ink);
}
.ig-quote-inner {
	max-width: var(--ig-max);
	margin: 0 auto;
	display: grid;
	grid-template-columns: 1.4fr 1fr;
	gap: 80px;
	align-items: center;
}
.ig-quote-title {
	font-size: clamp(2rem, 3.4vw, 2.8rem);
	font-weight: 700;
	line-height: 1.1;
	letter-spacing: -0.025em;
	margin-top: 14px;
	margin-bottom: 20px;
	color: var(--ig-on-ink);
}
.ig-quote-text p {
	font-size: 16px;
	color: rgba(240, 238, 233, 0.70);
	line-height: 1.65;
	max-width: 580px;
}
.ig-quote-ticks {
	display: flex;
	flex-wrap: wrap;
	gap: 32px;
	margin-top: 20px;
	font-family: var(--ig-font-mono);
	font-size: 11px;
	color: rgba(240, 238, 233, 0.55);
	letter-spacing: 0.05em;
}
.ig-quote-ticks span::before {
	content: "✓ ";
	color: var(--ig-brass);
}

.ig-quote-buttons {
	display: flex;
	flex-direction: column;
	gap: 16px;
}

/* Brass button variant (overrides .ig-btn-primary in this dark context) */
.ig-btn-brass {
	background: var(--ig-brass);
	color: var(--ig-ink);
	border: 1.5px solid var(--ig-brass);
}
.ig-btn-brass:hover {
	background: var(--ig-brass-hover);
	border-color: var(--ig-brass-hover);
	color: var(--ig-ink);
	transform: translateY(-1px);
}

/* Ghost-light variant — outlined button on dark surface */
.ig-btn-ghost-light {
	background: transparent;
	color: var(--ig-on-ink);
	border: 1.5px solid rgba(240, 238, 233, 0.20);
}
.ig-btn-ghost-light:hover {
	border-color: rgba(240, 238, 233, 0.40);
	background: rgba(240, 238, 233, 0.06);
	color: var(--ig-on-ink);
}

.ig-btn-block {
	justify-content: center;
	width: 100%;
}


/* ============================================================
   FOOTER OVERRIDE — phase 1 used --ig-ink, demo uses slightly darker
   Single source of truth lives in variables.css (--ig-footer-bg).
   ============================================================ */
.ig-footer { background: var(--ig-footer-bg); }


/* ============================================================
   RESPONSIVE — match Phase 1 breakpoints (1024 tablet, 640 mobile)
   ============================================================ */
@media (max-width: 1024px) {
	.ig-presets-header {
		flex-direction: column;
		align-items: flex-start;
		gap: 14px;
	}
	.ig-section-sub-right {
		text-align: left;
		max-width: 580px;
	}
	.ig-chip-grid {
		grid-template-columns: repeat(2, 1fr);
	}

	.ig-perf-inner {
		grid-template-columns: 1fr;
		gap: 32px;
	}
	.ig-perf-lead {
		border-right: none;
		padding-right: 0;
		border-bottom: 1px solid var(--ig-on-ink-line);
		padding-bottom: 32px;
	}

	.ig-uc-grid {
		grid-template-columns: repeat(2, 1fr);
	}

	.ig-energy-inner {
		grid-template-columns: 1fr;
		gap: 48px;
	}

	.ig-quote-inner {
		grid-template-columns: 1fr;
		gap: 48px;
	}
}

@media (max-width: 640px) {
	.ig-presets { padding: 50px 20px; }
	.ig-chip-grid { grid-template-columns: 1fr; }

	.ig-perf-band { padding: 50px 20px; }
	.ig-perf-inner > .ig-perf-stat {
		padding: 22px 0;
		border-bottom: 1px solid var(--ig-on-ink-line);
	}
	.ig-perf-inner > .ig-perf-stat:last-child { border-bottom: none; }

	.ig-use-cases { padding: 60px 20px; }
	.ig-uc-header { margin-bottom: 36px; }
	.ig-uc-label-name { font-size: 18px; }

	.ig-energy { padding: 60px 20px; }
	.ig-energy-photo { height: 240px; }
	.ig-energy-stats {
		grid-template-columns: 1fr;
		gap: 14px;
		padding: 22px 22px;
		text-align: center;
	}
	.ig-estat { text-align: center; }
	.ig-estat-arrow { transform: rotate(90deg); }
	.ig-estat-saving {
		padding-left: 0;
		padding-top: 14px;
		text-align: center;
		border-left: none;
		border-top: 1px dashed var(--ig-ink-line);
	}

	.ig-faq { padding: 60px 20px; }
	.ig-faq-q { padding: 22px 0; }
	.ig-faq-q-text { font-size: 15px; }
	.ig-faq-a { padding-right: 0; }

	.ig-quote-cta { padding: 60px 20px; }
	.ig-quote-ticks { gap: 18px; flex-direction: column; }
}