/**
 * BusinessZindagi Tools – Design System v1.4.0
 * Professional, spacious, application-like UX for every tool.
 * Inspired by modern SaaS utility pages (original BusinessZindagi design).
 *
 * Load after frontend.css / calculator.css. Does not remove existing classes.
 */

/* ─── Design Tokens (override & extend) ─── */
:root {
	--bz-primary: #0b5ed7;
	--bz-primary-hover: #0a4bb8;
	--bz-primary-soft: #e8f1fc;
	--bz-secondary: #5b21b6;
	--bz-success: #15803d;
	--bz-success-soft: #ecfdf5;
	--bz-warning: #d97706;
	--bz-danger: #dc2626;
	--bz-bg: #f1f5f9;
	--bz-bg-elevated: #ffffff;
	--bz-card-bg: #ffffff;
	--bz-text: #0f172a;
	--bz-text-muted: #64748b;
	--bz-text-subtle: #94a3b8;
	--bz-border: #e2e8f0;
	--bz-border-strong: #cbd5e1;
	--bz-shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 4px 16px rgba(15, 23, 42, 0.06);
	--bz-shadow-lg: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 12px 28px -4px rgba(15, 23, 42, 0.1);
	--bz-radius: 12px;
	--bz-radius-lg: 16px;
	--bz-radius-sm: 8px;
	--bz-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
	--bz-touch: 48px;
	--bz-space-xs: 6px;
	--bz-space-sm: 10px;
	--bz-space-md: 16px;
	--bz-space-lg: 24px;
	--bz-space-xl: 32px;
	--bz-space-2xl: 48px;
	--bz-input-h: 48px;
	--bz-max-tool: 920px;
}

.bz-tools-wrapper.bz-dark,
body.bz-dark-mode .bz-tools-wrapper {
	--bz-bg: #0f172a;
	--bz-bg-elevated: #1e293b;
	--bz-card-bg: #1e293b;
	--bz-text: #f1f5f9;
	--bz-text-muted: #94a3b8;
	--bz-text-subtle: #64748b;
	--bz-border: #334155;
	--bz-border-strong: #475569;
	--bz-shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.25);
	--bz-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
	--bz-primary-soft: #1e3a5f;
	--bz-success-soft: #14532d;
}

/* ─── Tool Page Shell ─── */
.bz-calculator-page {
	padding: var(--bz-space-xl) 0 var(--bz-space-2xl);
	background: var(--bz-bg);
	min-height: 70vh;
}

.bz-tools-wrapper .bz-container {
	max-width: 1100px;
	margin: 0 auto;
	padding: 0 20px;
}

@media (min-width: 768px) {
	.bz-tools-wrapper .bz-container {
		padding: 0 28px;
	}
}

/* ─── Back link ─── */
.bz-back-link {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-size: 0.9rem;
	font-weight: 500;
	color: var(--bz-text-muted);
	text-decoration: none;
	margin-bottom: var(--bz-space-lg);
	padding: 6px 0;
	transition: color 0.15s ease;
}

.bz-back-link:hover,
.bz-back-link:focus-visible {
	color: var(--bz-primary);
	outline: none;
}

/* ─── Tool Header (spacious, clear hierarchy) ─── */
.bz-calc-header {
	display: flex;
	align-items: flex-start;
	gap: 18px;
	margin-bottom: var(--bz-space-xl);
	padding-bottom: var(--bz-space-lg);
	border-bottom: 1px solid var(--bz-border);
}

.bz-calc-icon {
	font-size: 2.75rem;
	line-height: 1;
	flex-shrink: 0;
	width: 64px;
	height: 64px;
	display: flex;
	align-items: center;
	justify-content: center;
	background: var(--bz-primary-soft);
	border-radius: var(--bz-radius);
}

.bz-calc-header > div {
	flex: 1;
	min-width: 0;
}

.bz-calc-header h1 {
	margin: 0 0 8px;
	font-size: clamp(1.5rem, 4.2vw, 1.85rem);
	font-weight: 700;
	color: var(--bz-text);
	line-height: 1.25;
	letter-spacing: -0.02em;
}

.bz-calc-header p {
	margin: 0;
	color: var(--bz-text-muted);
	font-size: 1.05rem;
	line-height: 1.5;
	max-width: 56ch;
}

/* FREE TOOL badge */
.bz-tool-badge {
	display: inline-flex;
	align-items: center;
	gap: 4px;
	margin-top: 10px;
	padding: 4px 10px;
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: var(--bz-success);
	background: var(--bz-success-soft);
	border-radius: 999px;
	border: 1px solid rgba(21, 128, 61, 0.2);
}

.bz-tool-badge--new {
	color: var(--bz-primary);
	background: var(--bz-primary-soft);
	border-color: rgba(11, 94, 215, 0.2);
}

/* ─── Main application card / layout ─── */
.bz-calc-layout {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: var(--bz-space-lg);
	align-items: start;
	margin-bottom: var(--bz-space-xl);
}

.bz-calc-layout--single {
	grid-template-columns: 1fr;
	max-width: var(--bz-max-tool);
}

.bz-calc-layout--wide {
	grid-template-columns: 1.15fr 0.85fr;
}

.bz-calc-card {
	background: var(--bz-card-bg);
	border: 1px solid var(--bz-border);
	border-radius: var(--bz-radius-lg);
	padding: var(--bz-space-xl);
	box-shadow: var(--bz-shadow);
}

.bz-calc-card h2 {
	margin: 0 0 var(--bz-space-lg);
	font-size: 1.05rem;
	font-weight: 700;
	color: var(--bz-text);
	padding-bottom: 12px;
	border-bottom: 1px solid var(--bz-border);
	letter-spacing: -0.01em;
}

/* ─── Form controls – larger, clearer ─── */
.bz-form-group {
	margin-bottom: var(--bz-space-md);
}

.bz-form-group:last-of-type {
	margin-bottom: var(--bz-space-lg);
}

.bz-form-group label,
.bz-label-text {
	display: block;
	font-size: 0.9rem;
	font-weight: 600;
	margin-bottom: 6px;
	color: var(--bz-text);
}

.bz-field-hint {
	display: block;
	font-size: 0.8rem;
	color: var(--bz-text-muted);
	margin-top: 5px;
	line-height: 1.4;
}

.bz-input,
.bz-tools-wrapper select.bz-input,
.bz-tools-wrapper input.bz-input,
.bz-tools-wrapper textarea.bz-input {
	width: 100%;
	padding: 12px 14px;
	font-size: 16px; /* prevent iOS zoom */
	line-height: 1.4;
	border: 1.5px solid var(--bz-border-strong);
	border-radius: var(--bz-radius-sm);
	background: var(--bz-bg-elevated);
	color: var(--bz-text);
	transition: border-color 0.15s ease, box-shadow 0.15s ease;
	font-family: inherit;
	min-height: var(--bz-input-h);
	-webkit-appearance: none;
	appearance: none;
}

.bz-input:hover {
	border-color: #94a3b8;
}

.bz-input:focus {
	outline: none;
	border-color: var(--bz-primary);
	box-shadow: 0 0 0 3px rgba(11, 94, 215, 0.18);
}

.bz-input::placeholder {
	color: var(--bz-text-subtle);
}

select.bz-input {
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right 12px center;
	padding-right: 40px;
	cursor: pointer;
}

/* Radio / checkbox groups */
.bz-radio-group {
	display: flex;
	flex-direction: column;
	gap: 8px;
}

.bz-radio {
	display: flex;
	align-items: center;
	gap: 10px;
	padding: 12px 14px;
	border: 1.5px solid var(--bz-border);
	border-radius: var(--bz-radius-sm);
	cursor: pointer;
	transition: border-color 0.15s, background 0.15s;
	background: var(--bz-bg-elevated);
	min-height: var(--bz-touch);
}

.bz-radio:hover {
	border-color: var(--bz-border-strong);
	background: var(--bz-bg);
}

.bz-radio input {
	width: 18px;
	height: 18px;
	accent-color: var(--bz-primary);
	flex-shrink: 0;
	cursor: pointer;
}

.bz-radio input:checked + span {
	font-weight: 600;
	color: var(--bz-text);
}

.bz-radio:has(input:checked) {
	border-color: var(--bz-primary);
	background: var(--bz-primary-soft);
}

.bz-error-msg {
	padding: 10px 14px;
	margin-bottom: var(--bz-space-md);
	background: #fef2f2;
	border: 1px solid #fecaca;
	border-radius: var(--bz-radius-sm);
	color: var(--bz-danger);
	font-size: 0.9rem;
}

/* ─── Buttons – prominent primary CTA ─── */
.bz-btn-row {
	display: flex;
	flex-wrap: wrap;
	gap: 12px;
	align-items: center;
	margin-top: 4px;
}

.bz-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	padding: 12px 22px;
	font-size: 0.95rem;
	font-weight: 600;
	font-family: inherit;
	line-height: 1.3;
	border-radius: var(--bz-radius-sm);
	border: 1.5px solid transparent;
	cursor: pointer;
	transition: background 0.15s, border-color 0.15s, box-shadow 0.15s, transform 0.1s;
	min-height: var(--bz-touch);
	text-decoration: none;
	-webkit-appearance: none;
	appearance: none;
}

.bz-btn:active {
	transform: scale(0.98);
}

.bz-btn-primary {
	background: var(--bz-primary);
	color: #fff;
	border-color: var(--bz-primary);
	box-shadow: 0 1px 2px rgba(11, 94, 215, 0.25);
}

.bz-btn-primary:hover,
.bz-btn-primary:focus-visible {
	background: var(--bz-primary-hover);
	border-color: var(--bz-primary-hover);
	box-shadow: 0 4px 12px rgba(11, 94, 215, 0.3);
	outline: none;
}

.bz-btn-secondary {
	background: var(--bz-bg);
	color: var(--bz-text);
	border-color: var(--bz-border-strong);
}

.bz-btn-secondary:hover,
.bz-btn-secondary:focus-visible {
	background: #e2e8f0;
	outline: none;
}

.bz-btn-outline {
	background: transparent;
	color: var(--bz-text);
	border-color: var(--bz-border-strong);
}

.bz-btn-outline:hover:not(:disabled),
.bz-btn-outline:focus-visible:not(:disabled) {
	border-color: var(--bz-primary);
	color: var(--bz-primary);
	background: var(--bz-primary-soft);
	outline: none;
}

.bz-btn:disabled {
	opacity: 0.5;
	cursor: not-allowed;
	transform: none;
}

/* ─── Results panel – visually distinct ─── */
.bz-results-panel {
	background: var(--bz-card-bg);
	border: 1px solid var(--bz-border);
	border-radius: var(--bz-radius-lg);
	padding: var(--bz-space-xl);
	box-shadow: var(--bz-shadow);
	position: relative;
}

.bz-results-panel::before {
	content: "";
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 3px;
	background: linear-gradient(90deg, var(--bz-primary), var(--bz-secondary));
	border-radius: var(--bz-radius-lg) var(--bz-radius-lg) 0 0;
}

.bz-results {
	display: flex;
	flex-direction: column;
	gap: 0;
}

.bz-result-item {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	gap: 16px;
	padding: 12px 0;
	border-bottom: 1px solid var(--bz-border);
}

.bz-result-item:last-child {
	border-bottom: none;
}

.bz-result-label {
	font-size: 0.9rem;
	color: var(--bz-text-muted);
	font-weight: 500;
}

.bz-result-value {
	font-size: 1.05rem;
	font-weight: 600;
	color: var(--bz-text);
	font-variant-numeric: tabular-nums;
	text-align: right;
}

.bz-result-highlight {
	margin-top: 8px;
	padding: 16px;
	background: var(--bz-primary-soft);
	border-radius: var(--bz-radius-sm);
	border: none;
	border-bottom: none;
}

.bz-result-highlight .bz-result-label {
	font-size: 0.95rem;
	font-weight: 600;
	color: var(--bz-text);
}

.bz-result-highlight .bz-result-value {
	font-size: 1.35rem;
	font-weight: 700;
	color: var(--bz-primary);
	letter-spacing: -0.02em;
}

.bz-results-actions {
	margin-top: var(--bz-space-lg);
	padding-top: var(--bz-space-md);
	border-top: 1px solid var(--bz-border);
}

/* ─── Supporting content sections ─── */
.bz-calc-note {
	margin-top: var(--bz-space-xl);
	padding: var(--bz-space-md) var(--bz-space-lg);
	background: var(--bz-bg-elevated);
	border: 1px solid var(--bz-border);
	border-radius: var(--bz-radius);
	font-size: 0.9rem;
	color: var(--bz-text-muted);
}

.bz-calc-note p {
	margin: 0;
	line-height: 1.55;
}

.bz-section-block {
	margin-top: var(--bz-space-2xl);
	padding-top: var(--bz-space-xl);
	border-top: 1px solid var(--bz-border);
}

.bz-section-block h2 {
	font-size: 1.25rem;
	font-weight: 700;
	margin: 0 0 var(--bz-space-md);
	color: var(--bz-text);
}

.bz-section-block h3 {
	font-size: 1.05rem;
	font-weight: 600;
	margin: var(--bz-space-lg) 0 var(--bz-space-sm);
	color: var(--bz-text);
}

.bz-section-block p,
.bz-section-block li {
	font-size: 0.95rem;
	line-height: 1.6;
	color: var(--bz-text-muted);
}

.bz-section-block ol,
.bz-section-block ul {
	padding-left: 1.25rem;
	margin: 0 0 var(--bz-space-md);
}

.bz-section-block li {
	margin-bottom: 6px;
}

/* FAQ */
.bz-faq {
	margin-top: var(--bz-space-lg);
}

.bz-faq-item {
	border: 1px solid var(--bz-border);
	border-radius: var(--bz-radius-sm);
	margin-bottom: 10px;
	background: var(--bz-card-bg);
	overflow: hidden;
}

.bz-faq-item summary {
	padding: 14px 16px;
	font-weight: 600;
	font-size: 0.95rem;
	cursor: pointer;
	list-style: none;
	color: var(--bz-text);
}

.bz-faq-item summary::-webkit-details-marker {
	display: none;
}

.bz-faq-item summary::before {
	content: "+";
	display: inline-block;
	width: 1.2em;
	font-weight: 700;
	color: var(--bz-primary);
}

.bz-faq-item[open] summary::before {
	content: "−";
}

.bz-faq-item p {
	padding: 0 16px 14px;
	margin: 0;
	font-size: 0.9rem;
	color: var(--bz-text-muted);
	line-height: 1.55;
}

/* Related tools */
.bz-related-tools {
	margin-top: var(--bz-space-2xl);
}

.bz-related-tools h2 {
	font-size: 1.2rem;
	font-weight: 700;
	margin: 0 0 var(--bz-space-md);
}

.bz-related-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
	gap: 14px;
}

.bz-related-card {
	display: flex;
	align-items: flex-start;
	gap: 12px;
	padding: 16px;
	background: var(--bz-card-bg);
	border: 1px solid var(--bz-border);
	border-radius: var(--bz-radius);
	text-decoration: none;
	color: inherit;
	transition: border-color 0.15s, box-shadow 0.15s;
	box-shadow: var(--bz-shadow);
}

.bz-related-card:hover,
.bz-related-card:focus-visible {
	border-color: var(--bz-primary);
	box-shadow: var(--bz-shadow-lg);
	outline: none;
}

.bz-related-card .bz-related-icon {
	font-size: 1.5rem;
	flex-shrink: 0;
}

.bz-related-card strong {
	display: block;
	font-size: 0.95rem;
	font-weight: 600;
	color: var(--bz-text);
	margin-bottom: 2px;
}

.bz-related-card span {
	font-size: 0.8rem;
	color: var(--bz-text-muted);
	line-height: 1.35;
}

/* ─── Responsive ─── */
@media (max-width: 900px) {
	.bz-calc-layout,
	.bz-calc-layout--wide {
		grid-template-columns: 1fr;
	}

	.bz-calc-card,
	.bz-results-panel {
		padding: var(--bz-space-lg);
	}
}

@media (max-width: 600px) {
	.bz-calculator-page {
		padding: var(--bz-space-lg) 0 var(--bz-space-xl);
	}

	.bz-calc-header {
		flex-direction: column;
		gap: 12px;
		margin-bottom: var(--bz-space-lg);
	}

	.bz-calc-icon {
		width: 52px;
		height: 52px;
		font-size: 2rem;
	}

	.bz-calc-header h1 {
		font-size: 1.4rem;
	}

	.bz-calc-header p {
		font-size: 0.95rem;
	}

	.bz-calc-card,
	.bz-results-panel {
		padding: var(--bz-space-md);
		border-radius: var(--bz-radius);
	}

	.bz-btn-row {
		flex-direction: column;
		align-items: stretch;
	}

	.bz-btn {
		width: 100%;
	}

	.bz-result-highlight .bz-result-value {
		font-size: 1.2rem;
	}

	.bz-tools-wrapper .bz-container {
		padding: 0 16px;
	}
}

/* Focus visibility for a11y */
.bz-tools-wrapper :focus-visible {
	outline: 2px solid var(--bz-primary);
	outline-offset: 2px;
}

.bz-btn:focus-visible {
	outline: 2px solid var(--bz-primary);
	outline-offset: 2px;
}

/* Print */
@media print {
	.bz-back-link,
	.bz-btn-row,
	.bz-related-tools,
	.bz-calc-note {
		display: none !important;
	}

	.bz-calc-layout {
		grid-template-columns: 1fr;
	}

	.bz-calc-card,
	.bz-results-panel {
		box-shadow: none;
		border: 1px solid #ccc;
	}
}