/**
 * Financial Calculator Hub - Scoped Frontend Stylesheet
 *
 * All rules strictly scoped to .fch-wrapper to guarantee zero theme interference.
 * Inherits base typography and line heights from active theme.
 *
 * @version 1.0.0
 * @author Financial Calculator Hub Team
 */

.fch-wrapper {
	--fch-primary: #2563eb;
	--fch-primary-hover: #1d4ed8;
	--fch-primary-light: #eff6ff;
	--fch-accent: #f97316;
	--fch-accent-light: #fff7ed;
	--fch-sky: #0ea5e9;
	--fch-sky-light: #f0f9ff;
	--fch-emerald: #10b981;
	--fch-emerald-light: #ecfdf5;
	--fch-slate-900: #0f172a;
	--fch-slate-800: #1e293b;
	--fch-slate-700: #334155;
	--fch-slate-600: #475569;
	--fch-slate-500: #64748b;
	--fch-slate-400: #94a3b8;
	--fch-slate-200: #e2e8f0;
	--fch-slate-100: #f1f5f9;
	--fch-slate-50: #f8fafc;
	--fch-white: #ffffff;
	--fch-radius: 14px;
	--fch-radius-sm: 8px;
	--fch-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
	--fch-shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
	--fch-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);

	box-sizing: border-box;
	width: 100%;
	max-width: 1120px;
	margin: 24px auto;
	color: var(--fch-slate-800);
}

.fch-wrapper *,
.fch-wrapper *::before,
.fch-wrapper *::after {
	box-sizing: border-box;
}

/* ==========================================================================
   Ad Placements
   ========================================================================== */
.fch-wrapper .fch-ad-container {
	margin: 16px 0;
	padding: 12px;
	background: var(--fch-slate-50);
	border: 1px dashed var(--fch-slate-200);
	border-radius: var(--fch-radius-sm);
	text-align: center;
}

.fch-wrapper .fch-ad-tag {
	display: block;
	font-size: 10px;
	letter-spacing: 0.05em;
	text-transform: uppercase;
	color: var(--fch-slate-400);
	margin-bottom: 8px;
	font-weight: 600;
}

.fch-wrapper .fch-ad-inner {
	display: flex;
	justify-content: center;
	align-items: center;
	min-height: 50px;
	overflow: hidden;
}

/* ==========================================================================
   Main Calculator Card
   ========================================================================== */
.fch-wrapper .fch-main-card {
	background: var(--fch-white);
	border: 1px solid var(--fch-slate-200);
	border-radius: var(--fch-radius);
	box-shadow: var(--fch-shadow);
	overflow: hidden;
}

/* ==========================================================================
   Tabs Navigation Bar
   ========================================================================== */
.fch-wrapper .fch-tabs-header {
	display: flex;
	background: var(--fch-slate-50);
	border-bottom: 1px solid var(--fch-slate-200);
	padding: 8px 12px 0;
	gap: 6px;
	overflow-x: auto;
	scrollbar-width: none;
}

.fch-wrapper .fch-tabs-header::-webkit-scrollbar {
	display: none;
}

.fch-wrapper .fch-tab-nav-btn {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	background: transparent;
	border: none;
	border-bottom: 3px solid transparent;
	padding: 12px 18px;
	font-size: 14px;
	font-weight: 600;
	color: var(--fch-slate-600);
	cursor: pointer;
	border-radius: var(--fch-radius-sm) var(--fch-radius-sm) 0 0;
	transition: var(--fch-transition);
	white-space: nowrap;
	outline: none;
}

.fch-wrapper .fch-tab-nav-btn:hover {
	color: var(--fch-primary);
	background: rgba(37, 99, 235, 0.04);
}

.fch-wrapper .fch-tab-nav-btn.active {
	color: var(--fch-primary);
	background: var(--fch-white);
	border-bottom-color: var(--fch-primary);
	box-shadow: 0 -2px 6px rgba(0, 0, 0, 0.02);
}

.fch-wrapper .fch-tab-icon {
	display: inline-flex;
	align-items: center;
	justify-content: center;
}

.fch-wrapper .fch-tab-icon svg {
	width: 17px;
	height: 17px;
}

/* ==========================================================================
   Tab Panels & Grid Layout
   ========================================================================== */
.fch-wrapper .fch-tab-panel {
	display: none;
	padding: 28px;
}

.fch-wrapper .fch-tab-panel.active {
	display: block;
	animation: fchFadeIn 0.25s ease-out;
}

@keyframes fchFadeIn {
	from {
		opacity: 0;
		transform: translateY(4px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

.fch-wrapper .fch-calc-grid {
	display: grid;
	grid-template-columns: 1.25fr 1fr;
	gap: 36px;
	align-items: start;
}

/* Headings */
.fch-wrapper .fch-section-heading {
	margin-bottom: 24px;
}

.fch-wrapper .fch-section-heading h3 {
	margin: 0 0 4px;
	font-size: 20px;
	font-weight: 700;
	color: var(--fch-slate-900);
	line-height: 1.3;
}

.fch-wrapper .fch-section-heading p {
	margin: 0;
	font-size: 13px;
	color: var(--fch-slate-500);
}

/* ==========================================================================
   Form Controls, Inputs, and Sliders
   ========================================================================== */
.fch-wrapper .fch-input-group {
	background: var(--fch-slate-50);
	border: 1px solid var(--fch-slate-200);
	border-radius: var(--fch-radius-sm);
	padding: 16px 18px;
	margin-bottom: 20px;
	transition: var(--fch-transition);
}

.fch-wrapper .fch-input-group:focus-within {
	border-color: var(--fch-primary);
	background: var(--fch-white);
	box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.fch-wrapper .fch-label-row {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 12px;
	gap: 12px;
}

.fch-wrapper .fch-label-row label,
.fch-wrapper .fch-block-label {
	font-size: 14px;
	font-weight: 600;
	color: var(--fch-slate-700);
	margin: 0;
	cursor: pointer;
}

.fch-wrapper .fch-tenure-title-wrap {
	display: flex;
	align-items: center;
	gap: 10px;
}

/* Toggle Pills */
.fch-wrapper .fch-toggle-pills {
	display: inline-flex;
	background: var(--fch-slate-200);
	border-radius: 20px;
	padding: 2px;
}

.fch-wrapper .fch-pill-btn {
	background: transparent;
	border: none;
	font-size: 11px;
	font-weight: 600;
	color: var(--fch-slate-600);
	padding: 2px 10px;
	border-radius: 16px;
	cursor: pointer;
	transition: var(--fch-transition);
}

.fch-wrapper .fch-pill-btn.active {
	background: var(--fch-primary);
	color: var(--fch-white);
}

/* Input with Prefix / Suffix */
.fch-wrapper .fch-input-affix {
	display: inline-flex;
	align-items: center;
	background: var(--fch-white);
	border: 1px solid var(--fch-slate-200);
	border-radius: 6px;
	padding: 4px 10px;
	font-weight: 600;
	box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.04);
}

.fch-wrapper .fch-prefix,
.fch-wrapper .fch-suffix {
	color: var(--fch-slate-500);
	font-size: 13px;
	user-select: none;
}

.fch-wrapper .fch-number-input {
	border: none;
	outline: none;
	background: transparent;
	font-size: 15px;
	font-weight: 700;
	color: var(--fch-slate-900);
	width: 110px;
	text-align: right;
	padding: 2px 4px;
	font-family: inherit;
	-moz-appearance: textfield;
}

.fch-wrapper .fch-number-input::-webkit-outer-spin-button,
.fch-wrapper .fch-number-input::-webkit-inner-spin-button {
	-webkit-appearance: none;
	margin: 0;
}

.fch-wrapper .fch-input-sm {
	width: 70px;
}

/* Modern Range Slider */
.fch-wrapper .fch-range-slider {
	-webkit-appearance: none;
	appearance: none;
	width: 100%;
	height: 6px;
	background: var(--fch-slate-200);
	border-radius: 999px;
	outline: none;
	margin: 8px 0;
	cursor: pointer;
	transition: background 0.2s;
}

.fch-wrapper .fch-range-slider::-webkit-slider-thumb {
	-webkit-appearance: none;
	appearance: none;
	width: 20px;
	height: 20px;
	border-radius: 50%;
	background: var(--fch-primary);
	border: 3px solid var(--fch-white);
	box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
	cursor: grab;
	transition: transform 0.15s ease, background-color 0.15s ease;
}

.fch-wrapper .fch-range-slider::-webkit-slider-thumb:hover {
	transform: scale(1.15);
	background: var(--fch-primary-hover);
}

.fch-wrapper .fch-range-slider::-webkit-slider-thumb:active {
	cursor: grabbing;
	transform: scale(1.25);
}

.fch-wrapper .fch-range-slider::-moz-range-thumb {
	width: 20px;
	height: 20px;
	border-radius: 50%;
	background: var(--fch-primary);
	border: 3px solid var(--fch-white);
	box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
	cursor: grab;
	transition: transform 0.15s ease, background-color 0.15s ease;
}

.fch-wrapper .fch-range-slider::-moz-range-thumb:hover {
	transform: scale(1.15);
	background: var(--fch-primary-hover);
}

.fch-wrapper .fch-slider-bounds {
	display: flex;
	justify-content: space-between;
	font-size: 11px;
	font-weight: 500;
	color: var(--fch-slate-400);
	margin-top: 2px;
}

/* ==========================================================================
   GST Specific Controls (Modes & Slabs)
   ========================================================================== */
.fch-wrapper .fch-mode-switch {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 10px;
	margin-top: 10px;
}

.fch-wrapper .fch-mode-btn {
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	background: var(--fch-white);
	border: 1.5px solid var(--fch-slate-200);
	border-radius: var(--fch-radius-sm);
	padding: 12px;
	cursor: pointer;
	text-align: left;
	transition: var(--fch-transition);
}

.fch-wrapper .fch-mode-btn strong {
	font-size: 13px;
	color: var(--fch-slate-800);
	margin-bottom: 2px;
}

.fch-wrapper .fch-mode-btn span {
	font-size: 11px;
	color: var(--fch-slate-500);
}

.fch-wrapper .fch-mode-btn.active {
	border-color: var(--fch-primary);
	background: var(--fch-primary-light);
}

.fch-wrapper .fch-mode-btn.active strong {
	color: var(--fch-primary);
}

.fch-wrapper .fch-rate-presets {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 8px;
	margin-top: 8px;
	margin-bottom: 12px;
}

.fch-wrapper .fch-preset-btn {
	background: var(--fch-white);
	border: 1px solid var(--fch-slate-200);
	border-radius: 6px;
	padding: 8px 6px;
	font-size: 13px;
	font-weight: 600;
	color: var(--fch-slate-700);
	cursor: pointer;
	transition: var(--fch-transition);
}

.fch-wrapper .fch-preset-btn:hover {
	border-color: var(--fch-primary);
	color: var(--fch-primary);
}

.fch-wrapper .fch-preset-btn.active {
	background: var(--fch-primary);
	border-color: var(--fch-primary);
	color: var(--fch-white);
}

.fch-wrapper .fch-custom-rate-row {
	border-top: 1px dashed var(--fch-slate-200);
	padding-top: 12px;
}

/* ==========================================================================
   Results Column & Summary Cards
   ========================================================================== */
.fch-wrapper .fch-results-col {
	display: flex;
	flex-direction: column;
	gap: 20px;
}

.fch-wrapper .fch-highlight-card {
	background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
	color: var(--fch-white);
	border-radius: var(--fch-radius-sm);
	padding: 22px 24px;
	box-shadow: 0 8px 20px -4px rgba(37, 99, 235, 0.35);
}

.fch-wrapper .fch-card-sip {
	background: linear-gradient(135deg, #0369a1 0%, #0ea5e9 100%);
	box-shadow: 0 8px 20px -4px rgba(14, 165, 233, 0.35);
}

.fch-wrapper .fch-card-gst {
	background: linear-gradient(135deg, #065f46 0%, #10b981 100%);
	box-shadow: 0 8px 20px -4px rgba(16, 185, 129, 0.35);
}

.fch-wrapper .fch-card-caption {
	display: block;
	font-size: 12px;
	letter-spacing: 0.05em;
	text-transform: uppercase;
	color: rgba(255, 255, 255, 0.8);
	font-weight: 600;
	margin-bottom: 6px;
}

.fch-wrapper .fch-card-big-value {
	font-size: 32px;
	font-weight: 800;
	letter-spacing: -0.02em;
	line-height: 1.1;
}

/* Metrics Summary */
.fch-wrapper .fch-summary-metrics {
	background: var(--fch-slate-50);
	border: 1px solid var(--fch-slate-200);
	border-radius: var(--fch-radius-sm);
	padding: 16px 20px;
}

.fch-wrapper .fch-metric-row {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 10px 0;
	border-bottom: 1px solid var(--fch-slate-200);
	font-size: 14px;
}

.fch-wrapper .fch-metric-row:last-child {
	border-bottom: none;
}

.fch-wrapper .fch-total-row {
	font-weight: 700;
	color: var(--fch-slate-900);
	font-size: 15px;
	padding-top: 12px;
}

.fch-wrapper .fch-metric-label {
	color: var(--fch-slate-600);
	display: inline-flex;
	align-items: center;
	gap: 8px;
}

.fch-wrapper .fch-metric-val {
	font-weight: 700;
	color: var(--fch-slate-900);
}

.fch-wrapper .fch-text-success {
	color: #059669;
}

/* Dots for chart mapping */
.fch-wrapper .fch-dot {
	width: 10px;
	height: 10px;
	border-radius: 50%;
	display: inline-block;
	flex-shrink: 0;
}

.fch-wrapper .fch-dot-primary { background: #2563eb; }
.fch-wrapper .fch-dot-accent { background: #f97316; }
.fch-wrapper .fch-dot-sky { background: #0ea5e9; }
.fch-wrapper .fch-dot-emerald { background: #10b981; }

/* Chart Container */
.fch-wrapper .fch-chart-container {
	position: relative;
	height: 220px;
	width: 100%;
	padding: 10px 0;
}

/* GST Tax Breakdown Card */
.fch-wrapper .fch-tax-breakdown-card {
	background: var(--fch-slate-50);
	border: 1px solid var(--fch-slate-200);
	border-radius: var(--fch-radius-sm);
	padding: 18px 20px;
}

.fch-wrapper .fch-tax-breakdown-card h4 {
	margin: 0 0 14px;
	font-size: 14px;
	font-weight: 700;
	color: var(--fch-slate-900);
}

.fch-wrapper .fch-tax-split-grid {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 12px;
}

.fch-wrapper .fch-tax-split-item {
	background: var(--fch-white);
	border: 1px solid var(--fch-slate-200);
	border-radius: 6px;
	padding: 12px;
}

.fch-wrapper .fch-split-full {
	grid-column: 1 / -1;
}

.fch-wrapper .fch-split-label {
	display: block;
	font-size: 12px;
	color: var(--fch-slate-500);
	margin-bottom: 4px;
}

.fch-wrapper .fch-split-label small {
	color: var(--fch-primary);
	font-weight: 600;
}

.fch-wrapper .fch-split-val {
	font-size: 16px;
	font-weight: 700;
	color: var(--fch-slate-900);
}

/* ==========================================================================
   Amortization Schedule & PDF Button
   ========================================================================== */
.fch-wrapper .fch-amortization-section {
	margin-top: 36px;
	padding-top: 28px;
	border-top: 1px solid var(--fch-slate-200);
}

.fch-wrapper .fch-schedule-header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 18px;
	flex-wrap: wrap;
	gap: 14px;
}

.fch-wrapper .fch-schedule-title-group h4 {
	margin: 0 0 4px;
	font-size: 18px;
	font-weight: 700;
	color: var(--fch-slate-900);
}

.fch-wrapper .fch-schedule-title-group p {
	margin: 0;
	font-size: 13px;
	color: var(--fch-slate-500);
}

.fch-wrapper .fch-btn-pdf {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	background: var(--fch-slate-900);
	color: var(--fch-white);
	border: none;
	border-radius: 8px;
	padding: 10px 18px;
	font-size: 13px;
	font-weight: 600;
	cursor: pointer;
	transition: var(--fch-transition);
	box-shadow: 0 2px 6px rgba(15, 23, 42, 0.15);
}

.fch-wrapper .fch-btn-pdf:hover {
	background: var(--fch-primary);
	transform: translateY(-1px);
	box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.fch-wrapper .fch-table-wrapper {
	max-height: 480px;
	overflow-y: auto;
	border: 1px solid var(--fch-slate-200);
	border-radius: var(--fch-radius-sm);
	box-shadow: var(--fch-shadow-sm);
}

.fch-wrapper .fch-schedule-table {
	width: 100%;
	border-collapse: collapse;
	text-align: right;
	font-size: 13px;
	background: var(--fch-white);
	margin: 0;
}

.fch-wrapper .fch-schedule-table th,
.fch-wrapper .fch-schedule-table td {
	padding: 10px 14px;
	border-bottom: 1px solid var(--fch-slate-200);
}

.fch-wrapper .fch-schedule-table th {
	background: var(--fch-slate-50);
	color: var(--fch-slate-700);
	font-weight: 700;
	position: sticky;
	top: 0;
	z-index: 2;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.fch-wrapper .fch-schedule-table th:first-child,
.fch-wrapper .fch-schedule-table td:first-child {
	text-align: center;
	font-weight: 600;
}

.fch-wrapper .fch-schedule-table tbody tr:hover {
	background: var(--fch-slate-50);
}

.fch-wrapper .fch-cell-primary {
	color: var(--fch-primary);
	font-weight: 600;
}

.fch-wrapper .fch-cell-accent {
	color: var(--fch-accent);
	font-weight: 600;
}

.fch-wrapper .fch-row-more td {
	text-align: center;
	background: var(--fch-slate-50);
	color: var(--fch-slate-500);
	font-size: 12px;
	padding: 14px;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 860px) {
	.fch-wrapper .fch-calc-grid {
		grid-template-columns: 1fr;
		gap: 24px;
	}

	.fch-wrapper .fch-tab-panel {
		padding: 20px 16px;
	}

	.fch-wrapper .fch-card-big-value {
		font-size: 28px;
	}

	.fch-wrapper .fch-schedule-header {
		flex-direction: column;
		align-items: stretch;
	}

	.fch-wrapper .fch-btn-pdf {
		justify-content: center;
	}
}

@media (max-width: 540px) {
	.fch-wrapper .fch-rate-presets {
		grid-template-columns: repeat(2, 1fr);
	}

	.fch-wrapper .fch-mode-switch {
		grid-template-columns: 1fr;
	}

	.fch-wrapper .fch-tax-split-grid {
		grid-template-columns: 1fr;
	}

	.fch-wrapper .fch-label-row {
		flex-direction: column;
		align-items: flex-start;
		gap: 6px;
	}

	.fch-wrapper .fch-input-affix {
		width: 100%;
		justify-content: space-between;
	}

	.fch-wrapper .fch-number-input {
		width: 100%;
		text-align: left;
	}
}