/* ===========================================================
   SquareFoot Calculator  v1.3
   Neutral styling that inherits the theme font (Astra etc.).
   Scoped under .sfc-wrap. Single accent colour, no gradients.
   =========================================================== */

.sfc-wrap {
	--sfc-accent: #2563eb;
	--sfc-accent-dark: #1d4ed8;
	--sfc-accent-soft: #eff6ff;
	--sfc-border: #e2e8f0;
	--sfc-border-strong: #cbd5e1;
	--sfc-bg-soft: #f8fafc;
	--sfc-bg-card: #ffffff;
	--sfc-bg-input: #ffffff;
	--sfc-text: #1e293b;
	--sfc-muted: #64748b;
	--sfc-tip-bg: #1e293b;
	--sfc-tip-text: #ffffff;
	--sfc-radius: 10px;

	max-width: 760px;
	margin: 0 auto;
	color: var(--sfc-text);
	font-size: 16px;
	line-height: 1.5;
	box-sizing: border-box;
}

/* Dark palette. Opt in per page with theme="dark", or theme="auto" to
   follow the visitor's OS. The default stays light, because a dark tool
   dropped into a light theme looks broken. */
.sfc-wrap[data-theme="dark"] {
	--sfc-accent: #60a5fa;
	--sfc-accent-dark: #3b82f6;
	--sfc-accent-soft: #1e3a5f;
	--sfc-border: #334155;
	--sfc-border-strong: #475569;
	--sfc-bg-soft: #1e293b;
	--sfc-bg-card: #0f172a;
	--sfc-bg-input: #1e293b;
	--sfc-text: #e2e8f0;
	--sfc-muted: #94a3b8;
	--sfc-tip-bg: #e2e8f0;
	--sfc-tip-text: #0f172a;
}

@media (prefers-color-scheme: dark) {
	.sfc-wrap[data-theme="auto"] {
		--sfc-accent: #60a5fa;
		--sfc-accent-dark: #3b82f6;
		--sfc-accent-soft: #1e3a5f;
		--sfc-border: #334155;
		--sfc-border-strong: #475569;
		--sfc-bg-soft: #1e293b;
		--sfc-bg-card: #0f172a;
		--sfc-bg-input: #1e293b;
		--sfc-text: #e2e8f0;
		--sfc-muted: #94a3b8;
		--sfc-tip-bg: #e2e8f0;
		--sfc-tip-text: #0f172a;
	}
}

.sfc-wrap *,
.sfc-wrap *::before,
.sfc-wrap *::after {
	box-sizing: border-box;
}

/* The script toggles [hidden] on display:grid / display:flex blocks,
   which would otherwise ignore it. */
.sfc-wrap [hidden] { display: none !important; }

.sfc-sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	overflow: hidden;
	clip: rect(0 0 0 0);
	white-space: nowrap;
	border: 0;
}

.sfc-title {
	text-align: center;
	margin: 0 0 20px;
	font-size: 1.6em;
}

/* ---------- Area card ---------- */
.sfc-area {
	border: 1px solid var(--sfc-border);
	border-radius: var(--sfc-radius);
	padding: 16px;
	margin-bottom: 14px;
	background: var(--sfc-bg-card);
	position: relative;
}

.sfc-area-head {
	display: flex;
	align-items: center;
	flex-wrap: wrap;
	gap: 8px 10px;
	margin-bottom: 12px;
}

/* Editable area name. Reads as a heading until you hover or focus it. */
.sfc-wrap .sfc-area-label {
	flex: 1 1 140px;
	min-width: 0;
	width: auto;
	padding: 5px 8px;
	border: 1px solid transparent;
	border-radius: 6px;
	background: transparent;
	font-size: 0.95em;
	font-weight: 600;
	color: var(--sfc-text);
}
.sfc-wrap .sfc-area-label::placeholder {
	color: var(--sfc-muted);
	font-weight: 600;
	opacity: 1;
}
.sfc-wrap .sfc-area-label:hover { border-color: var(--sfc-border); }
.sfc-wrap .sfc-area-label:focus { background: var(--sfc-bg-input); }

.sfc-area-sub {
	font-size: 0.88em;
	color: var(--sfc-muted);
	white-space: nowrap;
}
.sfc-area-sub strong { color: var(--sfc-accent); }

.sfc-remove-area {
	background: none;
	border: none;
	color: #ef4444;
	cursor: pointer;
	font-size: 0.85em;
	padding: 4px 6px;
	border-radius: 6px;
	line-height: 1;
	font-family: inherit;
}
.sfc-remove-area:hover { background: rgba(239, 68, 68, 0.12); }

/* ---------- Area body: diagram + inputs ---------- */
.sfc-area-body {
	display: grid;
	grid-template-columns: 210px 1fr;
	gap: 16px;
	align-items: start;
}

.sfc-diagram {
	background: var(--sfc-bg-soft);
	border: 1px solid var(--sfc-border);
	border-radius: 8px;
	padding: 10px;
	display: flex;
	align-items: center;
	justify-content: center;
	/* Reserve the height so swapping diagrams never nudges the layout. */
	min-height: 148px;
}
.sfc-diagram svg { width: 100%; height: auto; max-height: 150px; }

.sfc-dg-shape { fill: var(--sfc-accent-soft); stroke: var(--sfc-accent); stroke-width: 2; }
.sfc-dg-inner { fill: var(--sfc-bg-card); stroke: var(--sfc-accent); stroke-width: 1.5; stroke-dasharray: 5 3; }
.sfc-dg-dash  { fill: none; stroke: var(--sfc-accent); stroke-width: 1.5; stroke-dasharray: 5 3; }
.sfc-dg-line  { stroke: var(--sfc-accent); stroke-width: 1.5; }
.sfc-dg-label { fill: var(--sfc-text); font-size: 13px; font-weight: 600; font-family: inherit; }
.sfc-dg-sub   { fill: var(--sfc-muted); font-size: 11px; font-family: inherit; }

/* ---------- Fields ---------- */
.sfc-field { margin-bottom: 12px; }
.sfc-field:last-child { margin-bottom: 0; }

.sfc-field label {
	display: block;
	font-size: 0.85em;
	font-weight: 600;
	margin-bottom: 5px;
	color: var(--sfc-text);
}

.sfc-wrap input[type="text"],
.sfc-wrap input[type="number"],
.sfc-wrap select {
	width: 100%;
	padding: 9px 11px;
	border: 1px solid var(--sfc-border);
	border-radius: 8px;
	font-size: 1em;
	font-family: inherit;
	color: var(--sfc-text);
	background-color: var(--sfc-bg-input);
	-webkit-appearance: none;
	appearance: none;
}

.sfc-wrap input:focus,
.sfc-wrap select:focus,
.sfc-wrap button:focus-visible {
	outline: none;
	border-color: var(--sfc-accent);
	box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
}

.sfc-wrap select {
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2364748b' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right 12px center;
	padding-right: 32px;
}

.sfc-dims { display: block; }
.sfc-dim { margin-bottom: 10px; }
.sfc-dim label {
	font-size: 0.8em;
	font-weight: 600;
	margin-bottom: 4px;
	display: block;
}

.sfc-dim-row { display: flex; gap: 8px; }
.sfc-dim-row .sfc-input { flex: 1; min-width: 0; }
.sfc-dim-row .sfc-input-in { flex: 0 0 72px; }
.sfc-dim-row .sfc-unit-select { flex: 0 0 110px; }

/* Unitless value (number of openings, sector angle). */
.sfc-dim-plain .sfc-dim-row .sfc-input { flex: 0 0 110px; }

/* ---------- Add button ---------- */
.sfc-actions { margin: 4px 0 20px; }

.sfc-add-area {
	width: 100%;
	padding: 11px;
	background: var(--sfc-bg-soft);
	border: 1px dashed var(--sfc-border-strong);
	border-radius: 8px;
	color: var(--sfc-accent);
	font-weight: 600;
	font-size: 0.95em;
	cursor: pointer;
	font-family: inherit;
}
.sfc-add-area:hover {
	background: var(--sfc-accent-soft);
	border-color: var(--sfc-accent);
}

/* ---------- Options ---------- */
.sfc-options {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 12px;
	padding: 16px;
	background: var(--sfc-bg-soft);
	border-radius: var(--sfc-radius);
	margin-bottom: 18px;
}

.sfc-price-row {
	display: flex;
	align-items: center;
	gap: 6px;
}
.sfc-price-row .sfc-currency-sign { font-weight: 600; color: var(--sfc-muted); }
.sfc-price-row .sfc-per { font-size: 0.85em; color: var(--sfc-muted); }
.sfc-price-row .sfc-price { flex: 1; min-width: 0; }
.sfc-price-row .sfc-price-unit { flex: 0 0 90px; }

.sfc-optional {
	font-weight: 400;
	font-size: 0.85em;
	color: var(--sfc-muted);
}

/* ---------- Hint tooltip (works on touch, not hover-only) ---------- */
.sfc-hint {
	position: relative;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 18px;
	height: 18px;
	padding: 0;
	border: none;
	border-radius: 50%;
	background: var(--sfc-border-strong);
	color: var(--sfc-bg-card);
	font-size: 11px;
	font-family: inherit;
	font-weight: 700;
	line-height: 1;
	cursor: pointer;
	vertical-align: middle;
	margin-left: 2px;
}
.sfc-hint:hover { background: var(--sfc-muted); }

.sfc-hint::after {
	content: attr(data-tip);
	position: absolute;
	bottom: calc(100% + 8px);
	left: 50%;
	transform: translateX(-50%);
	width: 220px;
	padding: 9px 11px;
	border-radius: 8px;
	background: var(--sfc-tip-bg);
	color: var(--sfc-tip-text);
	font-size: 12px;
	font-weight: 400;
	line-height: 1.45;
	text-align: left;
	white-space: normal;
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
	transition: opacity 0.12s ease;
	z-index: 20;
}
.sfc-hint:hover::after,
.sfc-hint.sfc-open::after {
	opacity: 1;
	visibility: visible;
}

/* ---------- Results ---------- */
.sfc-results {
	border: 2px solid var(--sfc-accent);
	border-radius: var(--sfc-radius);
	padding: 18px;
	background: var(--sfc-bg-card);
	position: relative;
}

.sfc-results-title {
	margin: 0 0 14px;
	font-size: 1.1em;
	font-weight: 700;
	text-align: center;
}

.sfc-empty-hint {
	margin: 0;
	padding: 18px 0;
	text-align: center;
	font-size: 0.95em;
	color: var(--sfc-muted);
}

.sfc-result-grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 10px;
	margin-bottom: 14px;
}

.sfc-result-box {
	text-align: center;
	padding: 12px 8px;
	border-radius: 8px;
	background: var(--sfc-bg-soft);
}
.sfc-result-box.sfc-primary {
	background: var(--sfc-accent);
	color: #fff;
}
.sfc-result-box.sfc-primary .sfc-result-label,
.sfc-result-box.sfc-primary .sfc-result-unit { color: rgba(255, 255, 255, 0.9); }

.sfc-result-label {
	display: block;
	font-size: 0.72em;
	text-transform: uppercase;
	letter-spacing: 0.03em;
	color: var(--sfc-muted);
	margin-bottom: 4px;
}
.sfc-result-value {
	display: block;
	font-size: 1.5em;
	font-weight: 700;
	line-height: 1.1;
	overflow-wrap: anywhere;
}
.sfc-result-unit {
	display: block;
	font-size: 0.72em;
	color: var(--sfc-muted);
	margin-top: 2px;
}

.sfc-conversions {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 8px 18px;
	padding-top: 12px;
	border-top: 1px solid var(--sfc-border);
	font-size: 0.9em;
	color: var(--sfc-muted);
}
.sfc-conversions strong { color: var(--sfc-text); }

/* ---------- Result actions ---------- */
.sfc-result-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	justify-content: center;
	margin-top: 16px;
}
.sfc-result-actions button {
	flex: 1 1 130px;
	max-width: 190px;
	padding: 10px 14px;
	border-radius: 8px;
	font-size: 0.9em;
	font-weight: 600;
	font-family: inherit;
	cursor: pointer;
	border: 1px solid var(--sfc-accent);
	background: var(--sfc-bg-card);
	color: var(--sfc-accent);
}
.sfc-copy { background: var(--sfc-accent); color: #fff; }
.sfc-copy:hover { background: var(--sfc-accent-dark); }
.sfc-result-actions button.sfc-copied {
	background: #16a34a;
	border-color: #16a34a;
	color: #fff;
}
.sfc-link:hover,
.sfc-print:hover { background: var(--sfc-accent-soft); }
.sfc-reset {
	color: var(--sfc-muted);
	border-color: var(--sfc-border);
	flex: 0 1 110px;
}
.sfc-reset:hover { background: var(--sfc-bg-soft); }

.sfc-credit {
	text-align: center;
	font-size: 0.8em;
	color: var(--sfc-muted);
	margin: 14px 0 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
	.sfc-area-body { grid-template-columns: 1fr; }
	.sfc-diagram { max-width: 260px; margin: 0 auto 4px; }
	.sfc-options { grid-template-columns: 1fr; }
	.sfc-result-grid { grid-template-columns: repeat(2, 1fr); }
	.sfc-result-actions button { flex: 1 1 100%; max-width: none; }
	.sfc-dim-row .sfc-unit-select { flex: 0 0 96px; }
	.sfc-hint::after { width: 190px; }
	.sfc-wrap .sfc-area-label { flex: 1 1 100%; order: 1; }
	.sfc-area-sub { order: 2; }
	.sfc-remove-area { order: 3; margin-left: auto; }
}

@media (prefers-reduced-motion: reduce) {
	.sfc-hint::after { transition: none; }
}

@media print {
	.sfc-actions,
	.sfc-result-actions,
	.sfc-remove-area { display: none !important; }
}