/* Balkonkraftwerk-Speicher-Rechner – Styles */
.bkw {
	--bkw-accent: #b8860b;
	--bkw-accent-dark: #8f6708;
	--bkw-border: #d9d9d9;
	--bkw-bg: #ffffff;
	--bkw-bg-soft: #f7f5f0;
	--bkw-text: #222222;
	--bkw-muted: #666666;
	--bkw-ok: #3a8f3a;
	--bkw-ok-soft: #eef7ee;
	--bkw-warn: #d97706;
	--bkw-warn-soft: #fdf4e6;

	box-sizing: border-box;
	max-width: 980px;
	margin: 1.5em auto;
	padding: 1.25em 1.5em;
	border: 1px solid var(--bkw-border);
	border-radius: 10px;
	background: var(--bkw-bg);
	color: var(--bkw-text);
	font-size: 16px;
	line-height: 1.45;
}
.bkw *, .bkw *::before, .bkw *::after { box-sizing: inherit; }

.bkw-head { margin-bottom: 1.1em; }
.bkw-title { margin: 0 0 0.25em 0; font-size: 1.35em; color: var(--bkw-text); }
.bkw-sub { margin: 0; color: var(--bkw-muted); font-size: 0.9em; }

/* Eingabefelder */
.bkw-fields {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 0.9em;
}
@media (max-width: 900px) { .bkw-fields { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .bkw-fields { grid-template-columns: 1fr; } }

.bkw-field {
	display: flex;
	flex-direction: column;
	gap: 0.25em;
	padding: 0.7em;
	border: 1px solid var(--bkw-border);
	border-radius: 8px;
	background: var(--bkw-bg-soft);
}
.bkw-field label { font-size: 0.85em; font-weight: 600; margin: 0; }
.bkw-input-wrap { display: flex; align-items: center; gap: 0.4em; }
.bkw-field input[type="number"],
.bkw-field select {
	flex: 1 1 auto;
	min-width: 0;
	width: 100%;
	padding: 0.4em 0.5em;
	border: 1px solid var(--bkw-border);
	border-radius: 6px;
	background: #fff;
	color: var(--bkw-text);
	font-size: 1em;
	font-family: inherit;
}
.bkw-field input:focus, .bkw-field select:focus {
	outline: 2px solid var(--bkw-accent);
	outline-offset: 1px;
}
.bkw-unit { font-size: 0.85em; color: var(--bkw-muted); white-space: nowrap; }
.bkw-field-hint { font-size: 0.75em; color: var(--bkw-muted); }

.bkw-advanced { margin-top: 0.9em; }
.bkw-advanced > summary {
	cursor: pointer;
	font-size: 0.9em;
	font-weight: 600;
	color: var(--bkw-accent-dark);
	padding: 0.3em 0;
}
.bkw-fields-advanced { margin-top: 0.7em; }

/* Auslöser */
.bkw-actions {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.8em;
	margin: 1.1em 0 0 0;
}
.bkw-calc {
	padding: 0.6em 1.4em;
	border: 0;
	border-radius: 6px;
	background: var(--bkw-accent);
	color: #fff;
	font-size: 1em;
	font-weight: 600;
	font-family: inherit;
	cursor: pointer;
	transition: background 0.15s ease;
}
.bkw-calc:hover { background: var(--bkw-accent-dark); }
.bkw-status { font-size: 0.78em; color: var(--bkw-muted); }

/* Ergebnis */
.bkw-result { margin-top: 1.4em; }
.bkw-h4 {
	margin: 1.6em 0 0.5em 0;
	font-size: 1.05em;
	color: var(--bkw-text);
}

.bkw-reco {
	padding: 1.1em 1.3em;
	border: 2px solid var(--bkw-accent);
	border-radius: 10px;
	background: linear-gradient(180deg, #fdfaf2 0%, #fff 100%);
}
.bkw-reco-label {
	font-size: 0.78em;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--bkw-accent-dark);
	font-weight: 700;
}
.bkw-reco-value {
	font-size: 2.2em;
	font-weight: 700;
	line-height: 1.1;
	margin: 0.1em 0;
}
.bkw-reco-range { font-size: 0.95em; color: var(--bkw-muted); }
.bkw-reco-text { margin: 0.7em 0 0 0; font-size: 0.92em; }

.bkw-warn {
	margin-top: 0.9em;
	padding: 0.8em 1em;
	border-left: 4px solid var(--bkw-warn);
	border-radius: 0 6px 6px 0;
	background: var(--bkw-warn-soft);
	font-size: 0.88em;
}
.bkw-warn p { margin: 0 0 0.5em 0; }
.bkw-warn p:last-child { margin-bottom: 0; }

/* Vergleich */
.bkw-compare {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 0.9em;
}
@media (max-width: 780px) { .bkw-compare { grid-template-columns: 1fr; } }

.bkw-card {
	padding: 0.9em 1em;
	border: 1px solid var(--bkw-border);
	border-radius: 8px;
	background: var(--bkw-bg-soft);
}
.bkw-card-mit { border-color: var(--bkw-accent); background: #fdfaf2; }
.bkw-card-delta { border-color: var(--bkw-ok); background: var(--bkw-ok-soft); }
.bkw-card-title {
	font-size: 0.85em;
	font-weight: 700;
	margin-bottom: 0.6em;
	padding-bottom: 0.4em;
	border-bottom: 1px solid var(--bkw-border);
}
.bkw-card dl {
	display: grid;
	grid-template-columns: 1fr auto;
	gap: 0.3em 0.8em;
	margin: 0;
	font-size: 0.88em;
}
.bkw-card dt { color: var(--bkw-muted); margin: 0; }
.bkw-card dd { margin: 0; text-align: right; white-space: nowrap; }
.bkw-card dd strong { font-size: 1.05em; }

/* Diagramme */
.bkw-charts { margin-top: 0.5em; }
.bkw-chart-hint { margin: 0 0 0.6em 0; font-size: 0.83em; color: var(--bkw-muted); }
.bkw-chart {
	width: 100%;
	overflow-x: auto;
	border: 1px solid var(--bkw-border);
	border-radius: 8px;
	background: var(--bkw-bg-soft);
	padding: 0.5em;
}
.bkw-chart svg { display: block; width: 100%; height: auto; min-width: 420px; }
.bkw .bkw-grid { stroke: #dcd8cf; stroke-width: 1; }
.bkw .bkw-axis { font-size: 11px; fill: #666; }
.bkw .bkw-axis-title { font-size: 11px; fill: #666; font-weight: 600; }
.bkw .bkw-line { fill: none; stroke: var(--bkw-accent); stroke-width: 2.5; }
.bkw .bkw-band { fill: rgba(184, 134, 11, 0.13); }
.bkw .bkw-mark { stroke: var(--bkw-accent-dark); stroke-width: 1; stroke-dasharray: 4 3; }
.bkw .bkw-dot { fill: var(--bkw-accent-dark); }
.bkw .bkw-bar-erz { fill: #e3d3a8; }
.bkw .bkw-bar-nutz { fill: var(--bkw-accent); }
.bkw .bkw-bar-verb { fill: #9aa5b1; }

/* Produkte */
.bkw-prod-hint { margin: 0 0 0.8em 0; font-size: 0.85em; color: var(--bkw-muted); }
.bkw-produkte { display: flex; flex-direction: column; gap: 0.7em; }

.bkw-produkt {
	display: flex;
	align-items: stretch;
	gap: 1em;
	padding: 0.9em 1em;
	border: 1px solid var(--bkw-border);
	border-radius: 8px;
	background: #fff;
}
.bkw-produkt.bkw-passt { border-color: var(--bkw-accent); background: #fdfaf2; }
.bkw-produkt.bkw-bestes { border-width: 2px; box-shadow: 0 1px 6px rgba(184, 134, 11, 0.18); }
.bkw-produkt.bkw-passt-nicht { opacity: 0.72; }

.bkw-produkt-bild { flex: 0 0 92px; display: flex; align-items: center; }
.bkw-produkt-bild img { max-width: 100%; height: auto; border-radius: 6px; }
.bkw-produkt-body { flex: 1 1 auto; min-width: 0; }

.bkw-produkt-kopf {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	gap: 0.6em;
}
.bkw-produkt-name { font-weight: 700; font-size: 1.02em; }
.bkw-produkt-badge {
	display: inline-block;
	padding: 0.12em 0.6em;
	border-radius: 999px;
	background: var(--bkw-accent);
	color: #fff;
	font-size: 0.72em;
	font-weight: 700;
	white-space: nowrap;
}
.bkw-passt-nicht .bkw-produkt-badge { background: #9aa5b1; }

.bkw-produkt-fakten {
	display: flex;
	flex-wrap: wrap;
	gap: 0.3em 1em;
	margin-top: 0.3em;
	font-size: 0.86em;
	color: var(--bkw-muted);
}
.bkw-produkt-hinweis { margin: 0.4em 0 0 0; font-size: 0.85em; }
.bkw-produkt-rechnung {
	display: flex;
	flex-wrap: wrap;
	gap: 0.3em 1.2em;
	margin-top: 0.5em;
	padding-top: 0.5em;
	border-top: 1px dashed var(--bkw-border);
	font-size: 0.86em;
}

.bkw-produkt-cta { flex: 0 0 auto; display: flex; align-items: center; }
.bkw-btn {
	display: inline-block;
	padding: 0.55em 1.1em;
	border-radius: 6px;
	background: var(--bkw-accent);
	color: #fff;
	font-size: 0.92em;
	font-weight: 600;
	text-decoration: none;
	white-space: nowrap;
}
.bkw-btn:hover { background: var(--bkw-accent-dark); color: #fff; }
.bkw-btn-off { background: #c7c7c7; cursor: default; }

@media (max-width: 640px) {
	.bkw-produkt { flex-wrap: wrap; }
	.bkw-produkt-cta { width: 100%; }
	.bkw-btn { display: block; text-align: center; width: 100%; }
}

.bkw-produkte-fuss {
	margin-top: 0.9em;
	font-size: 0.78em;
	color: var(--bkw-muted);
}
.bkw-empty { font-size: 0.9em; color: var(--bkw-muted); }

/* Erklärung */
.bkw-info { margin-top: 1.4em; border-top: 1px solid var(--bkw-border); padding-top: 0.8em; }
.bkw-info > summary {
	cursor: pointer;
	font-weight: 600;
	font-size: 0.92em;
	color: var(--bkw-accent-dark);
}
.bkw-info ul { margin: 0.8em 0 0 0; padding-left: 1.2em; font-size: 0.87em; }
.bkw-info li { margin-bottom: 0.5em; }