/* ===========================================================
   Pump House Tools - root stylesheet
   All shared styling lives here. Component-scoped .razor.css
   files should be the exception, not the rule.
   =========================================================== */

:root {
	--font-sans:
		system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial,
		sans-serif;
	--font-mono:
		"Cascadia Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo,
		monospace;

	--space-1: 0.25rem;
	--space-2: 0.5rem;
	--space-3: 0.75rem;
	--space-4: 1rem;
	--space-5: 1.5rem;
	--space-6: 2rem;
	--space-8: 3rem;

	--radius-sm: 4px;
	--radius-md: 8px;
	--radius-lg: 12px;

	--max-width: 1440px;

	--focus-ring: 0 0 0 3px var(--color-focus-ring);

	/* Light theme (default) */
	--color-bg: #f5f7f9;
	--color-bg-elevated: #ffffff;
	--color-bg-sunken: #eceff2;
	--color-text: #1b2430;
	--color-text-muted: #5b6775;
	--color-border: #d6dde3;
	--color-primary: #0b6e8c;
	--color-primary-hover: #075a73;
	--color-primary-contrast: #ffffff;
	--color-danger: #b3261e;
	--color-danger-bg: #fbe9e7;
	--color-success: #1e7a3d;
	--color-success-bg: #e7f5ea;
	--color-focus-ring: #0b6e8ca6;
	--color-banner-bg: #0b2b36;
	--color-banner-text: #f5f7f9;
	--shadow-sm: 0 1px 2px rgba(16, 24, 32, 0.08);
	--shadow-md: 0 4px 12px rgba(16, 24, 32, 0.12);
	--chart-system-high: #b3261e;
	--chart-system-low: #0b6e8c;
	--chart-series-1: #8a4fc2;
	--chart-series-2: #c26b1f;
	--chart-series-3: #1e7a3d;
	--chart-series-4: #ab3f8f;
	--chart-grid: #d6dde3;
}

@media (prefers-color-scheme: dark) {
	:root {
		--color-bg: #10151a;
		--color-bg-elevated: #1a2127;
		--color-bg-sunken: #0c1014;
		--color-text: #e7edf2;
		--color-text-muted: #9fb0bd;
		--color-border: #2b3640;
		--color-primary: #3fb6d8;
		--color-primary-hover: #6ccbe6;
		--color-primary-contrast: #0b1a20;
		--color-danger: #ff8a80;
		--color-danger-bg: #3a1613;
		--color-success: #7fdc9b;
		--color-success-bg: #112a18;
		--color-focus-ring: #3fb6d8a6;
		--color-banner-bg: #06141a;
		--color-banner-text: #e7edf2;
		--shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
		--shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
		--chart-system-high: #ff8a80;
		--chart-system-low: #3fb6d8;
		--chart-series-1: #c79bf0;
		--chart-series-2: #f0a860;
		--chart-series-3: #7fdc9b;
		--chart-series-4: #e38fd0;
		--chart-grid: #2b3640;
	}
}

/* Manual theme switch overrides (data-theme set by site.js, wins over OS preference) */
:root[data-theme="light"] {
	--color-bg: #f5f7f9;
	--color-bg-elevated: #ffffff;
	--color-bg-sunken: #eceff2;
	--color-text: #1b2430;
	--color-text-muted: #5b6775;
	--color-border: #d6dde3;
	--color-primary: #0b6e8c;
	--color-primary-hover: #075a73;
	--color-primary-contrast: #ffffff;
	--color-danger: #b3261e;
	--color-danger-bg: #fbe9e7;
	--color-success: #1e7a3d;
	--color-success-bg: #e7f5ea;
	--color-focus-ring: #0b6e8ca6;
	--color-banner-bg: #0b2b36;
	--color-banner-text: #f5f7f9;
	--shadow-sm: 0 1px 2px rgba(16, 24, 32, 0.08);
	--shadow-md: 0 4px 12px rgba(16, 24, 32, 0.12);
	--chart-system-high: #b3261e;
	--chart-system-low: #0b6e8c;
	--chart-series-1: #8a4fc2;
	--chart-series-2: #c26b1f;
	--chart-series-3: #1e7a3d;
	--chart-series-4: #ab3f8f;
	--chart-grid: #d6dde3;
}

:root[data-theme="dark"] {
	--color-bg: #10151a;
	--color-bg-elevated: #1a2127;
	--color-bg-sunken: #0c1014;
	--color-text: #e7edf2;
	--color-text-muted: #9fb0bd;
	--color-border: #2b3640;
	--color-primary: #3fb6d8;
	--color-primary-hover: #6ccbe6;
	--color-primary-contrast: #0b1a20;
	--color-danger: #ff8a80;
	--color-danger-bg: #3a1613;
	--color-success: #7fdc9b;
	--color-success-bg: #112a18;
	--color-focus-ring: #3fb6d8a6;
	--color-banner-bg: #06141a;
	--color-banner-text: #e7edf2;
	--shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
	--shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
	--chart-system-high: #ff8a80;
	--chart-system-low: #3fb6d8;
	--chart-series-1: #c79bf0;
	--chart-series-2: #f0a860;
	--chart-series-3: #7fdc9b;
	--chart-series-4: #e38fd0;
	--chart-grid: #2b3640;
}

/* ---- Reset / base ---- */
* {
	box-sizing: border-box;
}

html,
body {
	margin: 0;
	padding: 0;
}

body {
	font-family: var(--font-sans);
	background: var(--color-bg);
	color: var(--color-text);
	line-height: 1.5;
	min-height: 100vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
	line-height: 1.25;
	margin: 0 0 var(--space-3);
}

p {
	margin: 0 0 var(--space-3);
}

a {
	color: var(--color-primary);
}

a:hover {
	color: var(--color-primary-hover);
}

:focus-visible {
	outline: none;
	box-shadow: var(--focus-ring);
	border-radius: var(--radius-sm);
}

/* ---- Layout shell ---- */
.app-banner {
	background: var(--color-banner-bg);
	color: var(--color-banner-text);
	display: flex;
	align-items: center;
	gap: var(--space-4);
	padding: var(--space-3) var(--space-5);
}

.app-banner__logo-link {
	display: inline-flex;
	line-height: 0;
}

.app-banner__logo {
	height: auto;
	width: 140px;
	max-width: 45vw;
}

@media (min-width: 768px) {
	.app-banner__logo {
		width: 300px;
	}
}

.app-banner__spacer {
	flex: 1 1 auto;
}

.app-banner__account {
	display: flex;
	align-items: center;
	gap: var(--space-3);
	font-size: 0.9rem;
}

.app-nav {
	background: var(--color-bg-elevated);
	border-bottom: 1px solid var(--color-border);
	padding: 0 var(--space-5);
	display: flex;
	align-items: center;
	gap: var(--space-2);
	overflow-x: auto;
}

.app-nav a {
	display: inline-block;
	padding: var(--space-3) var(--space-3);
	color: var(--color-text-muted);
	text-decoration: none;
	border-bottom: 2px solid transparent;
	font-weight: 500;
	white-space: nowrap;
}

.app-nav a:hover {
	color: var(--color-text);
}

.app-nav a.active {
	color: var(--color-primary);
	border-bottom-color: var(--color-primary);
}

.app-main {
	max-width: var(--max-width);
	margin: 0 auto;
	padding: var(--space-6) var(--space-5);
}

.theme-toggle {
	display: inline-flex;
	align-items: center;
	gap: var(--space-2);
	background: transparent;
	border: 1px solid rgba(255, 255, 255, 0.35);
	color: inherit;
	border-radius: var(--radius-md);
	padding: var(--space-1) var(--space-3);
	cursor: pointer;
	font-size: 0.85rem;
}

.theme-toggle:hover {
	background: rgba(255, 255, 255, 0.1);
	color: inherit;
}

.unit-toggle select {
	background: transparent;
	border: 1px solid rgba(255, 255, 255, 0.35);
	color: inherit;
	border-radius: var(--radius-md);
	padding: var(--space-1) var(--space-2);
	font-size: 0.85rem;
}

.unit-toggle select option {
	color: initial;
}

/* ---- Cards / panels ---- */
.card {
	background: var(--color-bg-elevated);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-lg);
	box-shadow: var(--shadow-sm);
	padding: var(--space-5);
	margin-bottom: var(--space-5);
}

/* ---- Buttons ---- */
.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: var(--space-2);
	font: inherit;
	font-weight: 600;
	border-radius: var(--radius-md);
	border: 1px solid transparent;
	padding: var(--space-2) var(--space-4);
	cursor: pointer;
	text-decoration: none;
	line-height: 1.2;
}

.btn-primary {
	background: var(--color-primary);
	color: var(--color-primary-contrast);
}

.btn-primary:hover {
	background: var(--color-primary-hover);
	color: var(--color-primary-contrast);
}

.btn-secondary {
	background: transparent;
	color: var(--color-text);
	border-color: var(--color-border);
}

.btn-secondary:hover {
	background: var(--color-bg-sunken);
	color: var(--color-text);
}

.btn-danger {
	background: var(--color-danger);
	color: #ffffff;
}

.btn:disabled {
	opacity: 0.6;
	cursor: not-allowed;
}

/* ---- Forms ---- */
.form-field {
	margin-bottom: var(--space-4);
	display: flex;
	flex-direction: column;
	gap: var(--space-1);
	max-width: 24rem;
}

.form-field--checkbox {
	flex-direction: row;
	align-items: center;
}

.form-field label {
	font-weight: 600;
	font-size: 0.9rem;
}

.form-field input[type="text"],
.form-field input[type="email"],
.form-field input[type="password"],
.form-field input[type="number"],
.form-field select,
.form-field textarea,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
	font: inherit;
	padding: var(--space-2) var(--space-3);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-sm);
	background: var(--color-bg-elevated);
	color: var(--color-text);
}

.validation-message {
	color: var(--color-danger);
	font-size: 0.85rem;
}

.validation-summary {
	color: var(--color-danger);
	list-style: none;
	padding: 0;
	margin: 0 0 var(--space-3);
}

/* ---- Status / alerts ---- */
.status-message {
	border-radius: var(--radius-md);
	padding: var(--space-3) var(--space-4);
	margin-bottom: var(--space-4);
}

.status-message--success {
	background: var(--color-success-bg);
	color: var(--color-success);
}

.status-message--error {
	background: var(--color-danger-bg);
	color: var(--color-danger);
}

/* ---- Form layout (calculator pages) ---- */
.form-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr));
	gap: 0 var(--space-5);
}

.form-grid .form-field {
	max-width: none;
}

.form-field__hint {
	color: var(--color-text-muted);
	font-size: 0.85rem;
}

.form-actions {
	display: flex;
	align-items: center;
	flex-wrap: wrap;
	gap: var(--space-3);
	margin: var(--space-4) 0;
}

/* Save bar stays in reach while scrolling long calculator pages (esp. on phones). */
.form-actions--sticky {
	position: sticky;
	bottom: 0;
	z-index: 10;
	margin-bottom: 0;
	padding: var(--space-3) var(--space-4);
	padding-bottom: calc(var(--space-3) + env(safe-area-inset-bottom, 0px));
	background: var(--color-bg-elevated);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-lg) var(--radius-lg) 0 0;
	box-shadow: var(--shadow-md);
}

.visually-hidden {
	position: absolute !important;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

.table-scroll {
	overflow-x: auto;
}

/* ---- Tables (engineering data grids) ---- */
table.data-grid {
	width: 100%;
	border-collapse: collapse;
	font-size: 0.9rem;
}

table.data-grid th,
table.data-grid td {
	border-bottom: 1px solid var(--color-border);
	padding: var(--space-2) var(--space-3);
	text-align: left;
}

table.data-grid th {
	color: var(--color-text-muted);
	font-weight: 600;
	position: sticky;
	top: 0;
	background: var(--color-bg-elevated);
}

table.data-grid td.numeric,
table.data-grid input[type="number"] {
	font-family: var(--font-mono);
	text-align: right;
}

table.data-grid input {
	width: 100%;
	min-width: 5rem;
}

table.data-grid--compact {
	width: auto;
}

/* ---- Pipe line-item editor ----
   Fields that don't apply to a row's type are de-emphasised on wide screens and
   hidden on narrow ones. Values are kept either way (display only, never cleared). */
.line-item--minor-loss :is(.uses-friction, .uses-fixed),
.line-item--friction :is(.uses-minor-loss, .uses-fixed),
.line-item--fixed :is(.uses-minor-loss, .uses-friction) {
	opacity: 0.45;
}

@media screen and (max-width: 59.99rem) {
	table.line-items,
	table.line-items tbody {
		display: block;
	}

	table.line-items thead {
		display: none;
	}

	table.line-items tr.line-item {
		display: grid;
		grid-template-columns: repeat(auto-fill, minmax(min(100%, 9rem), 1fr));
		gap: var(--space-3);
		padding: var(--space-4);
		margin-bottom: var(--space-3);
		background: var(--color-bg-sunken);
		border: 1px solid var(--color-border);
		border-radius: var(--radius-md);
	}

	table.line-items td {
		display: flex;
		flex-direction: column;
		gap: var(--space-1);
		padding: 0;
		border: 0;
	}

	table.line-items td[data-label]::before {
		content: attr(data-label);
		font-family: var(--font-sans);
		font-size: 0.85rem;
		font-weight: 600;
		color: var(--color-text-muted);
		text-align: left;
	}

	table.line-items input {
		min-width: 0;
	}

	table.line-items .line-item__description,
	table.line-items .line-item__type,
	table.line-items .line-item__actions {
		grid-column: 1 / -1;
	}

	table.line-items .line-item__actions {
		align-items: flex-end;
	}

	.line-item--minor-loss :is(.uses-friction, .uses-fixed),
	.line-item--friction :is(.uses-minor-loss, .uses-fixed),
	.line-item--fixed :is(.uses-minor-loss, .uses-friction) {
		display: none;
	}
}

/* ---- Phones ---- */
@media screen and (max-width: 47.99rem) {
	.app-main {
		padding: var(--space-4) var(--space-3);
	}

	.app-nav {
		padding: 0 var(--space-3);
	}

	.card {
		padding: var(--space-4);
	}

	h1 {
		font-size: 1.5rem;
	}

	/* 16px+ inputs stop iOS Safari from zooming on focus; also bigger touch targets. */
	input[type="text"],
	input[type="email"],
	input[type="password"],
	input[type="number"],
	select,
	textarea {
		font-size: 1rem;
		min-height: 2.75rem;
	}

	.btn {
		min-height: 2.75rem;
	}

	table.data-grid--compact {
		width: 100%;
	}

	table.data-grid--compact th,
	table.data-grid--compact td {
		padding: var(--space-2) var(--space-1);
	}

	table.data-grid--compact input {
		min-width: 0;
		width: 100%;
	}
}

/* ---- Chart ---- */
.chart-container {
	width: 100%;
	max-width: 820px;
}

.chart-container svg {
	width: 100%;
	height: auto;
}

.chart-axis-line {
	stroke: var(--color-text-muted);
	stroke-width: 1;
}

.chart-gridline {
	stroke: var(--chart-grid);
	stroke-width: 1;
}

.chart-label {
	fill: var(--color-text-muted);
	font-size: 11px;
	font-family: var(--font-sans);
}

.chart-series {
	fill: none;
	stroke-width: 2;
}

.chart-legend {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-4);
	margin-top: var(--space-3);
	font-size: 0.85rem;
}

.chart-legend__swatch {
	display: inline-block;
	width: 1rem;
	height: 0.25rem;
	margin-right: var(--space-1);
	border-radius: 2px;
	vertical-align: middle;
}

/* ---- Marketing / home page ---- */
.marketing-hero {
	text-align: center;
	padding: var(--space-8) var(--space-4);
}

.marketing-hero--compact {
	padding: var(--space-6) var(--space-4);
}

.marketing-hero h1 {
	max-width: 42rem;
	margin: 0 auto var(--space-4);
	font-size: 2rem;
}

.marketing-hero .lead {
	max-width: 38rem;
	margin: 0 auto var(--space-5);
	color: var(--color-text-muted);
	font-size: 1.1rem;
}

.marketing-actions {
	display: flex;
	gap: var(--space-3);
	justify-content: center;
	flex-wrap: wrap;
}

.marketing-section {
	margin: var(--space-6) 0;
}

.feature-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: var(--space-5);
}

.feature-card {
	background: var(--color-bg-elevated);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-lg);
	box-shadow: var(--shadow-sm);
	padding: var(--space-5);
}

.feature-card h3 {
	margin-bottom: var(--space-2);
}

.feature-card p {
	color: var(--color-text-muted);
	margin: 0;
}

.marketing-cta {
	text-align: center;
	background: var(--color-bg-elevated);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-lg);
	padding: var(--space-6) var(--space-4);
	margin: var(--space-6) 0;
}

/* ---- Auth pages ---- */
.auth-card {
	max-width: 28rem;
	margin: var(--space-8) auto;
	background: var(--color-bg-elevated);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-lg);
	box-shadow: var(--shadow-sm);
	padding: var(--space-6);
}

.auth-card__hint {
	color: var(--color-text-muted);
	font-size: 0.9rem;
}

/* ---- Misc ---- */
.page-message {
	color: var(--color-text-muted);
}

.text-danger {
	color: var(--color-danger);
}

.unsaved-indicator {
	color: var(--color-danger);
	font-weight: 600;
}

#blazor-error-ui {
	background: var(--color-danger-bg);
	color: var(--color-danger);
	bottom: 0;
	box-shadow: var(--shadow-md);
	display: none;
	left: 0;
	padding: var(--space-3) var(--space-5);
	position: fixed;
	width: 100%;
	z-index: 1000;
}

#blazor-error-ui .reload {
	color: var(--color-primary);
	margin-left: var(--space-2);
}

#blazor-error-ui .dismiss {
	cursor: pointer;
	float: right;
}

.blazor-error-boundary {
	background: var(--color-danger-bg);
	color: var(--color-danger);
	padding: var(--space-4);
	border-radius: var(--radius-md);
}

.blazor-error-boundary::after {
	content: "An error has occurred.";
}