/* ============================================================
   GST Invoicing landing — Fiscal Ledger Editorial
   Palette: #215C5C · #00c896 · #0d1f1f (matches site tokens)
   Display: Fraunces · Body: DM Sans · Mono: IBM Plex Mono
   ============================================================ */

.gst-page {
	--gst-dark: #0d1f1f;
	--gst-primary: #215c5c;
	--gst-mid: #2d7a7a;
	--gst-accent: #00c896;
	--gst-accent-soft: #e6faf5;
	--gst-muted: #7a8fa3;
	--gst-border: #e4eaf0;
	--gst-surface: #ffffff;
	--gst-bg: #f7fafa;
	--gst-grid: rgba(33, 92, 92, 0.045);
	--gst-content-max: 1320px;
	--gst-radius: 12px;
	--gst-radius-sm: 8px;
	font-family: "DM Sans", system-ui, sans-serif;
	color: var(--gst-dark);
}

.gst-page section[id] {
	scroll-margin-top: 5.75rem;
}

/* ---- Hero ---- */
.gst-hero {
	position: relative;
	padding: calc(5.5rem + 1.5rem + env(safe-area-inset-top, 0px)) 0 4rem;
	background: var(--gst-surface);
	overflow: hidden;
}

.gst-hero::before {
	content: '';
	position: absolute;
	inset: 0;
	background-image:
		linear-gradient(var(--gst-grid) 1px, transparent 1px),
		linear-gradient(90deg, var(--gst-grid) 1px, transparent 1px);
	background-size: 48px 48px;
	mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55) 0%, transparent 85%);
	pointer-events: none;
}

.gst-hero::after {
	content: '';
	position: absolute;
	top: -80px;
	right: -60px;
	width: 480px;
	height: 480px;
	background: radial-gradient(circle, rgba(0, 200, 150, 0.09) 0%, transparent 68%);
	pointer-events: none;
}

.gst-hero-inner {
	position: relative;
	z-index: 2;
	max-width: var(--gst-content-max);
	margin: 0 auto;
	padding: 0 1.5rem;
	display: grid;
	grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
	gap: clamp(2rem, 4vw, 3.5rem);
	align-items: center;
}

.gst-eyebrow {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	margin-bottom: 1.25rem;
}

.gst-eyebrow-dot {
	width: 8px;
	height: 8px;
	border-radius: 50%;
	background: var(--gst-accent);
	animation: gstPulse 2.4s ease-in-out infinite;
}

@keyframes gstPulse {
	0%, 100% { opacity: 1; transform: scale(1); }
	50% { opacity: 0.45; transform: scale(1.45); }
}

.gst-eyebrow-text {
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--gst-primary);
}

.gst-hero-h1 {
	font-family: "Fraunces", Georgia, serif;
	font-size: clamp(2.25rem, 4.8vw, 3.65rem);
	font-weight: 800;
	line-height: 1.08;
	letter-spacing: -0.025em;
	color: var(--gst-dark);
	margin-bottom: 1.25rem;
	max-width: 16ch;
}

.gst-hero-h1 em {
	font-style: normal;
	color: var(--gst-primary);
	position: relative;
}

.gst-hero-h1 em::after {
	content: '';
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0.08em;
	height: 3px;
	background: var(--gst-accent);
	opacity: 0.85;
}

.gst-hero-lead {
	font-size: 1.125rem;
	line-height: 1.65;
	color: var(--gst-muted);
	margin-bottom: 0.75rem;
	max-width: 38rem;
}

.gst-hero-note {
	font-size: 0.9375rem;
	color: #5a6d7d;
	margin-bottom: 1.5rem;
	max-width: 36rem;
}

.gst-tax-chips {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	margin-bottom: 1.75rem;
}

.gst-tax-chip {
	font-family: "IBM Plex Mono", ui-monospace, monospace;
	font-size: 0.6875rem;
	font-weight: 600;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	padding: 0.4rem 0.65rem;
	border-radius: 6px;
	border: 1px solid var(--gst-border);
	background: var(--gst-surface);
	color: var(--gst-primary);
}

.gst-tax-chip.is-accent {
	background: var(--gst-accent-soft);
	border-color: rgba(0, 200, 150, 0.35);
	color: #0b6b55;
}

.gst-hero-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 0.75rem;
	margin-bottom: 1rem;
}

.gst-btn-primary {
	background: var(--gst-primary);
	color: #fff;
	border: 2px solid var(--gst-primary);
	padding: 0.875rem 1.625rem;
	font-size: 0.9375rem;
	font-weight: 700;
	text-decoration: none;
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	border-radius: 6px;
	transition: background 0.2s, border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.gst-btn-primary:hover {
	background: var(--gst-dark);
	border-color: var(--gst-dark);
	color: #fff;
	text-decoration: none;
	transform: translateY(-1px);
	box-shadow: 0 8px 24px rgba(13, 31, 31, 0.2);
}

.gst-btn-secondary {
	background: transparent;
	color: var(--gst-primary);
	border: 2px solid var(--gst-border);
	padding: 0.875rem 1.625rem;
	font-size: 0.9375rem;
	font-weight: 600;
	text-decoration: none;
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	border-radius: 6px;
	transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.gst-btn-secondary:hover {
	border-color: var(--gst-primary);
	background: var(--gst-accent-soft);
	color: var(--gst-primary);
	text-decoration: none;
}

.gst-nocredit {
	font-size: 0.8125rem;
	font-weight: 600;
	color: #10b981;
	display: flex;
	align-items: center;
	gap: 0.35rem;
}

/* Hero visual */
.gst-hero-visual {
	position: relative;
}

.gst-invoice-frame {
	border-radius: var(--gst-radius);
	overflow: hidden;
	background: #fff;
	box-shadow:
		0 32px 80px rgba(13, 31, 31, 0.18),
		0 0 0 1px rgba(33, 92, 92, 0.08);
	line-height: 0;
}

.gst-invoice-frame img {
	display: block;
	width: 100%;
	height: auto;
}

.gst-float-card {
	position: absolute;
	z-index: 3;
	background: var(--gst-surface);
	border: 1px solid var(--gst-border);
	border-radius: 10px;
	padding: 0.875rem 1rem;
	box-shadow: 0 12px 40px rgba(13, 31, 31, 0.12);
	min-width: 0;
}

.gst-float-card--tax {
	top: 1rem;
	left: -0.75rem;
	max-width: min(calc(100% - 1rem), 220px);
}

.gst-float-card--gstin {
	bottom: 1.25rem;
	right: -0.5rem;
	max-width: min(calc(100% - 1rem), 260px);
}

.gst-float-label {
	font-size: 0.625rem;
	font-weight: 700;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--gst-muted);
	margin-bottom: 0.35rem;
}

.gst-float-rows {
	display: flex;
	flex-direction: column;
	gap: 0.35rem;
}

.gst-float-row {
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 0.75rem;
	font-size: 0.8125rem;
}

.gst-float-row span:first-child {
	font-family: "IBM Plex Mono", ui-monospace, monospace;
	font-weight: 600;
	color: var(--gst-primary);
	font-size: 0.75rem;
}

.gst-float-row span:last-child {
	font-weight: 700;
	color: var(--gst-dark);
}

.gst-gstin-value {
	font-family: "IBM Plex Mono", ui-monospace, monospace;
	font-size: 0.6875rem;
	font-weight: 600;
	color: var(--gst-dark);
	letter-spacing: 0.02em;
	word-break: break-all;
}

.gst-gstin-status {
	display: inline-flex;
	align-items: center;
	gap: 0.35rem;
	margin-top: 0.35rem;
	font-size: 0.75rem;
	font-weight: 700;
	color: #10b981;
}

.gst-invoice-caption {
	margin-top: 0.75rem;
	font-size: 0.8125rem;
	color: var(--gst-muted);
	text-align: center;
}

@media (prefers-reduced-motion: no-preference) {
	.gst-hero-content {
		animation: gstFadeUp 0.65s cubic-bezier(0.22, 1, 0.36, 1) both;
	}

	.gst-hero-visual {
		animation: gstFadeUp 0.65s cubic-bezier(0.22, 1, 0.36, 1) 0.12s both;
	}

	.gst-float-card--tax {
		animation: gstFloatIn 0.5s ease-out 0.45s both;
	}

	.gst-float-card--gstin {
		animation: gstFloatIn 0.5s ease-out 0.6s both;
	}
}

@keyframes gstFadeUp {
	from {
		opacity: 0;
		transform: translateY(18px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

@keyframes gstFloatIn {
	from {
		opacity: 0;
		transform: translateY(8px) scale(0.96);
	}
	to {
		opacity: 1;
		transform: translateY(0) scale(1);
	}
}

/* ---- Trust strip ---- */
.gst-trust {
	background: var(--gst-bg);
	border-top: 1px solid var(--gst-border);
	border-bottom: 1px solid var(--gst-border);
	padding: 1.125rem 0;
}

.gst-trust-inner {
	max-width: var(--gst-content-max);
	margin: 0 auto;
	padding: 0 1.5rem;
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 1rem;
}

.gst-trust-item {
	display: flex;
	align-items: flex-start;
	gap: 0.75rem;
	padding: 0.5rem 0;
}

.gst-trust-icon {
	width: 2.25rem;
	height: 2.25rem;
	flex-shrink: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	background: var(--gst-accent-soft);
	border-radius: 8px;
	color: var(--gst-primary);
	font-size: 0.95rem;
}

.gst-trust-title {
	font-size: 0.875rem;
	font-weight: 800;
	color: var(--gst-dark);
	line-height: 1.25;
	margin-bottom: 0.15rem;
}

.gst-trust-desc {
	font-size: 0.75rem;
	color: var(--gst-muted);
	line-height: 1.4;
	margin: 0;
}

/* ---- Section headers ---- */
.gst-section {
	padding: 4.5rem 0;
}

.gst-section--alt {
	background: var(--gst-bg);
}

.gst-section-inner {
	max-width: var(--gst-content-max);
	margin: 0 auto;
	padding: 0 1.5rem;
}

.gst-section-head {
	max-width: 42rem;
	margin-bottom: 2.75rem;
}

.gst-section-head.is-center {
	text-align: center;
	margin-left: auto;
	margin-right: auto;
}

.gst-section-kicker {
	display: inline-block;
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--gst-primary);
	margin-bottom: 0.75rem;
}

.gst-section-title {
	font-family: "Fraunces", Georgia, serif;
	font-size: clamp(1.75rem, 3.5vw, 2.35rem);
	font-weight: 800;
	line-height: 1.15;
	letter-spacing: -0.02em;
	color: var(--gst-dark);
	margin-bottom: 0.75rem;
}

.gst-section-lead {
	font-size: 1.0625rem;
	color: var(--gst-muted);
	line-height: 1.65;
	margin: 0;
}

/* ---- Feature grid ---- */
.gst-feature-grid {
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	gap: 1rem;
	align-items: stretch;
}

.gst-feature-card {
	display: flex;
	flex-direction: column;
	min-width: 0;
	height: 100%;
	background: var(--gst-surface);
	border: 1px solid var(--gst-border);
	border-radius: var(--gst-radius);
	padding: 1.35rem 1.5rem;
	position: relative;
	overflow: hidden;
	transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}

.gst-feature-card:hover {
	border-color: rgba(33, 92, 92, 0.25);
	box-shadow: 0 16px 48px rgba(13, 31, 31, 0.08);
	transform: translateY(-3px);
}

.gst-feature-card-top {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.75rem;
	margin-bottom: 1rem;
}

.gst-feature-num {
	font-family: "IBM Plex Mono", ui-monospace, monospace;
	font-size: 0.6875rem;
	font-weight: 600;
	letter-spacing: 0.08em;
	color: var(--gst-accent);
}

.gst-feature-icon {
	width: 2.75rem;
	height: 2.75rem;
	display: flex;
	align-items: center;
	justify-content: center;
	background: var(--gst-accent-soft);
	border-radius: 8px;
	color: var(--gst-primary);
	font-size: 1.125rem;
	flex-shrink: 0;
}

.gst-feature-title {
	font-size: 1.0625rem;
	font-weight: 800;
	color: var(--gst-dark);
	margin-bottom: 0.5rem;
	line-height: 1.3;
}

.gst-feature-desc {
	font-size: 0.9375rem;
	color: var(--gst-muted);
	line-height: 1.6;
	margin: 0;
	flex: 1;
}

@media (min-width: 768px) {
	.gst-feature-grid {
		grid-template-columns: repeat(2, minmax(0, 1fr));
		gap: 1.25rem;
	}
}

@media (min-width: 992px) {
	.gst-feature-grid {
		grid-template-columns: repeat(3, minmax(0, 1fr));
		gap: 1.25rem;
	}
}

/* ---- Segments ---- */
.gst-segment-grid {
	display: grid;
	grid-template-columns: repeat(12, 1fr);
	gap: 1rem;
}

.gst-segment-card {
	grid-column: span 12;
	display: flex;
	gap: 1rem;
	align-items: flex-start;
	background: var(--gst-surface);
	border: 1px solid var(--gst-border);
	border-radius: var(--gst-radius);
	padding: 1.25rem 1.35rem;
	transition: border-color 0.2s, box-shadow 0.2s;
}

.gst-segment-card:hover {
	border-color: rgba(0, 200, 150, 0.35);
	box-shadow: 0 8px 28px rgba(13, 31, 31, 0.06);
}

.gst-segment-icon {
	width: 2.5rem;
	height: 2.5rem;
	flex-shrink: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	background: var(--gst-dark);
	color: var(--gst-accent);
	border-radius: 8px;
	font-size: 1rem;
}

.gst-segment-title {
	font-size: 0.9375rem;
	font-weight: 800;
	color: var(--gst-dark);
	margin-bottom: 0.35rem;
}

.gst-segment-desc {
	font-size: 0.8125rem;
	color: var(--gst-muted);
	line-height: 1.55;
	margin: 0;
}

@media (min-width: 768px) {
	.gst-segment-card {
		grid-column: span 6;
	}
}

@media (min-width: 992px) {
	.gst-segment-card {
		grid-column: span 4;
	}
}

/* ---- FAQ ---- */
.gst-faq-list {
	display: flex;
	flex-direction: column;
	gap: 0.75rem;
	max-width: 44rem;
	margin: 0 auto;
	--bs-accordion-border-width: 0;
	--bs-accordion-border-radius: 0;
	--bs-accordion-inner-border-radius: 0;
	--bs-accordion-btn-padding-x: 1.5rem;
	--bs-accordion-btn-padding-y: 1.25rem;
	--bs-accordion-body-padding-x: 1.5rem;
	--bs-accordion-body-padding-y: 1.25rem;
}

.gst-faq-item {
	border: 1px solid var(--gst-border);
	border-radius: var(--gst-radius);
	background: var(--gst-surface);
	overflow: hidden;
	transition: border-color 0.2s, box-shadow 0.2s;
}

.gst-faq-item.accordion-item {
	border: 1px solid var(--gst-border);
}

.gst-faq-item.accordion-item:not(:first-of-type) {
	border-top: 1px solid var(--gst-border);
}

.gst-faq-item:has(.accordion-button:not(.collapsed)) {
	border-color: rgba(33, 92, 92, 0.3);
	box-shadow: 0 8px 28px rgba(13, 31, 31, 0.06);
}

.gst-faq-item .accordion-button {
	font-size: 0.9375rem;
	font-weight: 700;
	color: var(--gst-dark);
	background: var(--gst-surface);
	padding: 1.25rem 3.25rem 1.25rem 1.5rem;
	box-shadow: none;
	line-height: 1.45;
}

.gst-faq-item .accordion-button:not(.collapsed) {
	background: var(--gst-accent-soft);
	color: var(--gst-primary);
	box-shadow: none;
}

.gst-faq-item .accordion-button::after {
	width: 1rem;
	height: 1rem;
	background-size: 1rem;
	filter: brightness(0.4);
}

.gst-faq-item .accordion-button:focus {
	box-shadow: 0 0 0 3px rgba(0, 200, 150, 0.25);
	border-color: transparent;
}

.gst-faq-item .accordion-collapse {
	border-top: 1px solid var(--gst-border);
}

.gst-faq-item .accordion-collapse:not(.show) {
	border-top: none;
}

.gst-faq-item .accordion-body {
	font-size: 0.9375rem;
	line-height: 1.65;
	color: var(--gst-muted);
	padding: 1.25rem 1.5rem 1.35rem;
}

/* ---- CTA ---- */
.gst-cta {
	padding: 4rem 0;
	background: linear-gradient(135deg, var(--gst-dark) 0%, var(--gst-primary) 100%);
	position: relative;
	overflow: hidden;
}

.gst-cta::before {
	content: '';
	position: absolute;
	inset: 0;
	background-image:
		linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
		linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
	background-size: 32px 32px;
	pointer-events: none;
}

.gst-cta-inner {
	position: relative;
	z-index: 2;
	max-width: 40rem;
	margin: 0 auto;
	padding: 0 1.5rem;
	text-align: center;
}

.gst-cta-stamp {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	font-family: "IBM Plex Mono", ui-monospace, monospace;
	font-size: 0.625rem;
	font-weight: 600;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--gst-accent);
	border: 1px solid rgba(0, 200, 150, 0.45);
	padding: 0.35rem 0.75rem;
	border-radius: 999px;
	margin-bottom: 1.25rem;
}

.gst-cta-title {
	font-family: "Fraunces", Georgia, serif;
	font-size: clamp(1.75rem, 3.5vw, 2.35rem);
	font-weight: 800;
	color: #fff;
	line-height: 1.15;
	margin-bottom: 0.85rem;
}

.gst-cta-lead {
	font-size: 1.0625rem;
	color: rgba(255, 255, 255, 0.78);
	line-height: 1.65;
	margin-bottom: 1.75rem;
}

.gst-cta-actions {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 0.75rem;
	margin-bottom: 1rem;
}

.gst-cta .gst-btn-primary {
	background: var(--gst-accent);
	border-color: var(--gst-accent);
	color: var(--gst-dark);
}

.gst-cta .gst-btn-primary:hover {
	background: #fff;
	border-color: #fff;
	color: var(--gst-dark);
}

.gst-cta .gst-btn-secondary {
	border-color: rgba(255, 255, 255, 0.35);
	color: #fff;
}

.gst-cta .gst-btn-secondary:hover {
	background: rgba(255, 255, 255, 0.1);
	border-color: #fff;
	color: #fff;
}

.gst-cta .gst-nocredit {
	color: rgba(255, 255, 255, 0.85);
	justify-content: center;
}

/* ---- How It Works steps ---- */
.gst-steps {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 1.5rem;
	list-style: none;
	padding: 0;
	margin: 0;
	counter-reset: gst-step;
}

.gst-step {
	background: var(--gst-surface);
	border: 1px solid var(--gst-border);
	border-radius: var(--gst-radius);
	padding: 1.75rem 1.5rem;
	position: relative;
	overflow: hidden;
	transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}

.gst-step::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 3px;
	background: linear-gradient(90deg, var(--gst-accent) 0%, var(--gst-primary) 100%);
	opacity: 0;
	transition: opacity 0.25s;
}

.gst-step:hover {
	border-color: rgba(33, 92, 92, 0.25);
	box-shadow: 0 16px 48px rgba(13, 31, 31, 0.08);
	transform: translateY(-3px);
}

.gst-step:hover::before {
	opacity: 1;
}

.gst-step-num {
	font-family: "IBM Plex Mono", ui-monospace, monospace;
	font-size: 0.625rem;
	font-weight: 700;
	letter-spacing: 0.1em;
	color: var(--gst-accent);
	margin-bottom: 1rem;
}

.gst-step-icon {
	width: 3rem;
	height: 3rem;
	display: flex;
	align-items: center;
	justify-content: center;
	background: var(--gst-dark);
	color: var(--gst-accent);
	border-radius: 10px;
	font-size: 1.25rem;
	margin-bottom: 1rem;
}

.gst-step-title {
	font-size: 1rem;
	font-weight: 800;
	color: var(--gst-dark);
	line-height: 1.3;
	margin-bottom: 0.6rem;
}

.gst-step-desc {
	font-size: 0.9375rem;
	color: var(--gst-muted);
	line-height: 1.6;
	margin: 0;
}

@media (max-width: 991.98px) {
	.gst-steps {
		grid-template-columns: repeat(1, minmax(0, 1fr));
		gap: 1rem;
	}
}

@media (min-width: 640px) and (max-width: 991.98px) {
	.gst-steps {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

/* ---- Features CTA row ---- */
.gst-features-cta-row {
	margin-top: 2.25rem;
	display: flex;
	justify-content: center;
}

/* ---- FAQ footer row ---- */
.gst-faq-cta-row {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 1rem;
	margin-top: 2rem;
	flex-wrap: wrap;
}

.gst-faq-more {
	font-size: 0.9375rem;
	color: var(--gst-muted);
	margin: 0;
}

.gst-faq-contact-btn {
	padding: 0.65rem 1.25rem;
	font-size: 0.875rem;
}

/* ---- Responsive ---- */
@media (max-width: 991.98px) {
	.gst-hero {
		padding-top: calc(5.5rem + 1.75rem + env(safe-area-inset-top, 0px));
	}

	.gst-hero-inner {
		grid-template-columns: 1fr;
	}

	.gst-hero-h1 {
		max-width: none;
	}

	.gst-hero-visual {
		max-width: 28rem;
		margin: 0 auto;
	}

	.gst-float-card--tax {
		left: 0.5rem;
	}

	.gst-float-card--gstin {
		right: 0.5rem;
	}
}

@media (max-width: 767.98px) {
	.gst-trust-inner {
		grid-template-columns: 1fr;
		gap: 0.25rem;
	}

	.gst-section {
		padding: 3.25rem 0;
	}

	.gst-float-card--tax {
		top: 0.5rem;
	}

	.gst-float-card--gstin {
		bottom: 0.75rem;
	}
}

@media (prefers-reduced-motion: reduce) {
	.gst-eyebrow-dot {
		animation: none;
	}

	.gst-hero-content,
	.gst-hero-visual,
	.gst-float-card--tax,
	.gst-float-card--gstin {
		animation: none;
	}

	.gst-feature-card,
	.gst-btn-primary,
	.gst-btn-secondary,
	.gst-segment-card {
		transition: none;
	}
}