/* ============================================================
   PumpCalcs — calculator UI (loaded only when a calculator is on
   the page). Builds on the .pc-* primitives defined in style.css.
   ============================================================ */

.pc-calc__toolbar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	flex-wrap: wrap;
	margin-bottom: 8px;
}

/* Sign-convention radios — the single most important control (§9.3). */
.pc-radio {
	border: 0;
	margin: 6px 0 0;
	padding: 0;
	display: flex;
	flex-wrap: wrap;
	gap: 6px 16px;
}
.pc-radio label {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-size: 0.85rem;
	font-weight: 500;
	color: var(--wikipress-text);
	cursor: pointer;
}
.pc-radio input { accent-color: var(--pc-accent); }

.pc-field--wide { grid-column: 1 / -1; }

/* Pressure basis (gauge/absolute) selector under a field. */
.pc-basis {
	margin-top: 6px;
	font-family: var(--wikipress-font-ui);
	font-size: 0.8rem;
	padding: 4px 8px;
	border: 1px solid var(--wikipress-border);
	border-radius: var(--pc-radius-sm);
	background: #fff;
	color: var(--wikipress-text-light);
	align-self: flex-start;
}

/* Result: secondary (other-unit) value beside the primary readout. */
.pc-result__secondary {
	font-family: var(--pc-mono);
	color: var(--wikipress-text-light);
	font-size: 1rem;
}

/* Per-field unit dropdown that lives inside a .pc-input (e.g. flow gpm/m³/h/L/s). */
.pc-unit-select {
	flex: 0 0 auto;
	border: 0;
	border-left: 1px solid var(--wikipress-border-light);
	background: var(--wikipress-bg-off);
	color: var(--wikipress-text-light);
	font-family: var(--pc-mono);
	font-size: 0.85rem;
	padding: 0 8px;
	cursor: pointer;
}
.pc-unit-select:focus { outline: none; box-shadow: inset 0 0 0 2px var(--pc-accent-soft); }

/* Multi-row power results table. */
.pc-results-table { width: 100%; margin: 14px 0 4px; }
.pc-results-table td.pc-num,
.pc-results-table th[scope="row"] { white-space: nowrap; }
.pc-motor-note:empty { display: none; }

/* NPSHa: computed lookup readouts (atmospheric + vapor pressure). */
.pc-lookups {
	list-style: none;
	margin: 12px 0;
	padding: 12px 14px;
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
	gap: 6px 20px;
	background: var(--wikipress-bg-off);
	border: 1px solid var(--wikipress-border-light);
	border-radius: var(--pc-radius-sm);
	font-family: var(--wikipress-font-ui);
	font-size: 0.9rem;
}
.pc-lookups li { display: flex; justify-content: space-between; gap: 10px; }
.pc-lookups__label { color: var(--wikipress-text-light); }
.pc-lookups .pc-num { font-weight: 600; color: var(--pc-navy); }

/* NPSHa: margin + ratio row. */
.pc-margin {
	display: flex;
	flex-wrap: wrap;
	gap: 8px 28px;
	margin: 10px 0;
	font-family: var(--wikipress-font-ui);
	font-size: 0.95rem;
}
.pc-margin .pc-num { color: var(--pc-navy); }

/* Friction loss: minor-loss fittings panel. */
.pc-fittings { margin: 6px 0 4px; }
.pc-fittings > summary {
	cursor: pointer;
	font-family: var(--wikipress-font-ui);
	font-weight: 600;
	color: var(--pc-primary);
	padding: 4px 0;
}
.pc-fittings__grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
	gap: 8px 18px;
	margin-top: 10px;
}
.pc-fitting-row {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 10px;
	font-family: var(--wikipress-font-ui);
	font-size: 0.88rem;
}
.pc-fitting-name { color: var(--wikipress-text); }
.pc-fitting-k { color: var(--wikipress-text-light); font-family: var(--pc-mono); font-size: 0.78rem; }
.pc-fitting-row input {
	flex: 0 0 64px;
	width: 64px;
	padding: 5px 8px;
	border: 1px solid var(--wikipress-border);
	border-radius: var(--pc-radius-sm);
	font: inherit;
	text-align: right;
}
.pc-fitting-row input:focus { outline: none; border-color: var(--pc-accent); box-shadow: 0 0 0 2px var(--pc-accent-soft); }

/* Hazen-Williams: permanent validity notice + Darcy comparison panel. */
.pc-validity { margin: 4px 0 14px; }
.pc-compare { margin: 4px 0; }
.pc-compare > summary {
	cursor: pointer;
	font-family: var(--wikipress-font-ui);
	font-weight: 600;
	color: var(--pc-primary);
	padding: 4px 0;
}
.pc-compare__body {
	margin-top: 8px;
	padding: 12px 14px;
	background: var(--wikipress-bg-off);
	border: 1px solid var(--wikipress-border-light);
	border-left: 3px solid var(--pc-accent);
	border-radius: var(--pc-radius-sm);
	font-family: var(--wikipress-font-ui);
	font-size: 0.9rem;
}
.pc-compare__body p { margin: 0 0 6px; }
.pc-compare__body p:last-child { margin-bottom: 0; }
.pc-compare__body .pc-num { color: var(--pc-navy); font-size: 1.05rem; }
.pc-divergence { font-weight: 600; color: var(--pc-accent-hover); }

/* Affinity Laws: ratio line + chart. */
.pc-ratio-line {
	font-family: var(--wikipress-font-ui);
	font-size: 1rem;
	margin: 12px 0 4px;
	color: var(--wikipress-text-light);
}
.pc-ratio-line .pc-num { color: var(--pc-navy); font-size: 1.2rem; }

.pc-chart-wrap {
	margin: 16px 0 4px;
	padding: 0;
}
.pc-chart-wrap canvas {
	display: block;
	width: 100%;
	height: 320px;
	max-width: 100%;
}
.pc-chart-cap {
	font-family: var(--wikipress-font-ui);
	font-size: 0.8rem;
	color: var(--wikipress-text-light);
	margin-top: 6px;
	line-height: 1.5;
}

@media print {
	.pc-chart-wrap canvas { height: 260px; }
}

/* Section subheading within a calculator (e.g. the VFD block). */
.pc-subhead {
	font-family: var(--wikipress-font-ui);
	font-size: 0.95rem;
	font-weight: 600;
	color: var(--pc-navy);
	margin: 18px 0 4px;
	padding-bottom: 6px;
	border-bottom: 1px solid var(--wikipress-border-light);
}

/* Pipe size & velocity: recommended-size table with velocity bands. */
.pc-size-table { width: 100%; margin: 4px 0; }
.pc-size-table tbody tr.pc-band--ok td,
.pc-size-table tbody tr.pc-band--ok th { background: var(--pc-ok-bg); }
.pc-size-table tbody tr.pc-band--caution td,
.pc-size-table tbody tr.pc-band--caution th { background: var(--pc-warning-bg); }
.pc-size-table tbody tr.pc-band--excessive td,
.pc-size-table tbody tr.pc-band--excessive th { background: var(--pc-danger-bg); }
.pc-size-table tbody tr.is-current th[scope="row"] { position: relative; }
.pc-size-table tbody tr.is-current th[scope="row"]::before {
	content: "▸";
	position: absolute;
	left: 2px;
	color: var(--pc-navy);
}
.pc-size-table tbody tr.is-current { outline: 2px solid var(--pc-navy); outline-offset: -2px; }
.pc-size-table tbody tr.is-current th[scope="row"] { padding-left: 18px; font-weight: 700; }

.pc-band-badge {
	display: inline-block;
	padding: 2px 10px;
	border-radius: 999px;
	font-family: var(--wikipress-font-ui);
	font-size: 0.8rem;
	font-weight: 600;
}
.pc-band-badge.pc-band--ok { background: var(--pc-ok-bg); color: var(--pc-ok); }
.pc-band-badge.pc-band--caution { background: var(--pc-warning-bg); color: var(--pc-warning); }
.pc-band-badge.pc-band--excessive { background: var(--pc-danger-bg); color: var(--pc-danger); }

/* System curve: pasteable pump-points textarea. */
.pc-textarea {
	width: 100%;
	resize: vertical;
	border: 1px solid var(--wikipress-border);
	border-radius: var(--pc-radius-sm);
	padding: 8px 10px;
	font-size: 0.9rem;
	line-height: 1.5;
	background: #fff;
	color: var(--wikipress-text);
}
.pc-textarea:focus { outline: none; border-color: var(--pc-accent); box-shadow: 0 0 0 2px var(--pc-accent-soft); }

/* ---- Component breakdown: stacked bar + legend ---- */
.pc-breakdown { margin: 14px 0 4px; }

.pc-stack {
	display: flex;
	width: 100%;
	height: 20px;
	border-radius: 4px;
	overflow: hidden;
	background: var(--wikipress-border-light);
	box-shadow: inset 0 0 0 1px rgba(11, 42, 67, 0.08);
}
.pc-seg { height: 100%; display: block; }
.pc-seg--static   { background: var(--pc-primary); }
.pc-seg--friction { background: var(--pc-accent); }
.pc-seg--pressure { background: #3f6f8f; }
.pc-seg--velocity { background: #9fb8c8; }

/* Negative contributions read as "subtracts from TDH" via a hatch. */
.pc-seg.is-negative {
	background-image: repeating-linear-gradient(
		45deg,
		rgba(255, 255, 255, 0.55) 0,
		rgba(255, 255, 255, 0.55) 4px,
		transparent 4px,
		transparent 8px
	);
}

.pc-legend {
	list-style: none;
	margin: 10px 0 0;
	padding: 0;
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
	gap: 4px 18px;
	font-family: var(--wikipress-font-ui);
	font-size: 0.85rem;
}
.pc-legend li {
	display: flex;
	align-items: center;
	gap: 8px;
}
.pc-swatch {
	flex: 0 0 auto;
	width: 12px;
	height: 12px;
	border-radius: 3px;
}
.pc-legend-name { flex: 1 1 auto; color: var(--wikipress-text-light); }
.pc-legend-val { font-weight: 600; color: var(--wikipress-text); }

/* ---- Actions ---- */
.pc-calc__actions {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin: 14px 0 4px;
}
.pc-btn {
	font-family: var(--wikipress-font-ui);
	font-size: 0.85rem;
	font-weight: 600;
	padding: 7px 14px;
	border-radius: var(--pc-radius-sm);
	border: 1px solid var(--pc-accent);
	background: var(--pc-accent);
	color: #fff;
	cursor: pointer;
}
.pc-btn:hover { background: var(--pc-accent-hover); border-color: var(--pc-accent-hover); }
.pc-btn--ghost {
	background: #fff;
	color: var(--pc-primary);
	border-color: var(--wikipress-border);
}
.pc-btn--ghost[aria-pressed="true"] {
	background: var(--pc-accent-soft);
	border-color: var(--pc-accent);
	color: var(--pc-accent-hover);
}

/* ---- Substitution view ---- */
.pc-substitution {
	background: var(--pc-navy);
	color: #e6eef5;
	padding: 12px 14px;
	border-radius: var(--pc-radius-sm);
	font-size: 0.9rem;
	line-height: 1.7;
	white-space: pre-wrap;
	word-break: break-word;
	margin: 0 0 10px;
}
.pc-formula__note {
	font-size: 0.85rem;
	color: var(--wikipress-text-light);
	margin: 0;
}

.pc-warnings:empty { display: none; }
.pc-warnings .pc-note { margin: 10px 0 0; }

/* ---- Embed section ---- */
.pc-embed { margin-top: 16px; }
.pc-embed > summary {
	cursor: pointer;
	font-family: var(--wikipress-font-ui);
	font-weight: 600;
	color: var(--pc-primary);
}
.pc-embed-code {
	background: var(--wikipress-bg-off);
	border: 1px solid var(--wikipress-border-light);
	border-radius: var(--pc-radius-sm);
	padding: 12px;
	overflow-x: auto;
	font-size: 0.8rem;
}

/* ---- Page-level sections ---- */
.pc-section { margin: 2em 0; }
.pc-calc-purpose {
	font-family: var(--wikipress-font-ui);
	font-size: 1.05rem;
	color: var(--wikipress-text-light);
	margin-top: 0.25em;
}
.pc-related-list {
	list-style: none;
	padding: 0;
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: 10px;
}
.pc-related-list li {
	border: 1px solid var(--wikipress-border-light);
	border-left: 3px solid var(--pc-accent);
	border-radius: var(--pc-radius-sm);
	padding: 10px 12px;
	font-family: var(--wikipress-font-ui);
	font-size: 0.9rem;
}
.pc-related-list li.is-upcoming { border-left-color: var(--wikipress-border); color: var(--wikipress-text-light); }
.pc-soon { font-size: 0.75rem; opacity: 0.7; }
.pc-standards-chips { display: flex; flex-wrap: wrap; gap: 8px; }

/* ---- Calculator directory (archive) cards ---- */
.pc-calc-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
	gap: 14px;
	margin: 1.5em 0;
}
.pc-calc-card {
	display: flex;
	gap: 12px;
	align-items: flex-start;
	padding: 16px;
	border: 1px solid var(--wikipress-border-light);
	border-radius: var(--pc-radius);
	background: #fff;
	text-decoration: none;
	transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}
.pc-calc-card:hover {
	border-color: var(--pc-accent);
	box-shadow: var(--pc-shadow);
	transform: translateY(-1px);
	text-decoration: none;
}
.pc-calc-card__icon {
	flex: 0 0 auto;
	color: var(--pc-accent);
	display: inline-flex;
	padding-top: 2px;
}
.pc-calc-card__title {
	display: block;
	font-family: var(--wikipress-font-ui);
	font-weight: 600;
	color: var(--pc-navy);
}
.pc-calc-card__desc {
	display: block;
	font-family: var(--wikipress-font-ui);
	font-size: 0.85rem;
	color: var(--wikipress-text-light);
	margin-top: 2px;
}

/* ---- Mobile: single-column inputs + sticky result bar (§14.4) ---- */
@media (max-width: 640px) {
	.pc-calc__grid { grid-template-columns: 1fr; }
	.pc-result {
		position: sticky;
		bottom: 0;
		z-index: 20;
		margin: 0 -1px;
		border-radius: 0;
		box-shadow: 0 -2px 10px rgba(11, 42, 67, 0.12);
	}
}

/* ---- Print ---- */
@media print {
	.pc-calc__toolbar .pc-unit-toggle,
	.pc-calc__actions,
	.pc-embed { display: none !important; }
	.pc-substitution { background: #fff; color: #000; border: 1pt solid #000; }
	.pc-stack { box-shadow: none; }
}