/*
 * Sudoku Master – Plugin-Stylesheet
 * -----------------------------------------------------------------
 * CSS-Isolierung: JEDE Regel ist an ".sudoku-master-container"
 * gebunden, damit das Theme der Website nicht beeinflusst wird und
 * umgekehrt Theme-Styles die Spiel-Optik möglichst nicht stören.
 * Es wird keine eigene Schriftart geladen – die Typografie wird
 * bewusst vom umgebenden Theme geerbt (font-family: inherit).
 */

.sudoku-master-container {
	/* Design-Tokens, ausschließlich innerhalb des Containers gültig */
	--sm-blue-900: #0b3d91;
	--sm-blue-700: #1d4ed8;
	--sm-blue-600: #2563eb;
	--sm-blue-500: #3b82f6;
	--sm-blue-100: #e8f0fe;
	--sm-blue-50: #f4f8ff;
	--sm-ink: #1f2937;
	--sm-ink-soft: #4b5563;
	--sm-border: #dbe3ef;
	--sm-border-strong: #9fb3d1;
	--sm-white: #ffffff;
	--sm-success: #15803d;
	--sm-success-bg: #ecfdf3;
	--sm-danger: #dc2626;
	--sm-danger-bg: #fef2f2;
	--sm-radius-sm: 6px;
	--sm-radius-md: 10px;
	--sm-radius-lg: 16px;
	--sm-gap: 12px;
	--sm-shadow: 0 1px 2px rgba(16, 33, 66, 0.06), 0 8px 24px rgba(16, 33, 66, 0.06);

	box-sizing: border-box;
	max-width: 640px;
	margin: 0 auto;
	padding: 24px;
	background: var(--sm-white);
	border: 1px solid var(--sm-border);
	border-radius: var(--sm-radius-lg);
	box-shadow: var(--sm-shadow);
	color: var(--sm-ink);
	font-family: inherit;
	line-height: 1.4;
	-webkit-text-size-adjust: 100%;
}

.sudoku-master-container *,
.sudoku-master-container *::before,
.sudoku-master-container *::after {
	box-sizing: border-box;
}

.sudoku-master-container button {
	font-family: inherit;
	font-size: inherit;
	color: inherit;
	cursor: pointer;
}

.sudoku-master-container [hidden] {
	display: none !important;
}

/* ------------------------------------------------------------------
 * Toolbar: Schwierigkeitsauswahl + Statistiken
 * ---------------------------------------------------------------- */

.sudoku-master-container .sm-toolbar {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: var(--sm-gap);
	margin-bottom: 20px;
}

.sudoku-master-container .sm-difficulty {
	display: inline-flex;
	flex-wrap: wrap;
	gap: 6px;
	background: var(--sm-blue-50);
	border: 1px solid var(--sm-border);
	border-radius: var(--sm-radius-md);
	padding: 4px;
}

.sudoku-master-container .sm-diff-btn {
	appearance: none;
	border: 1px solid transparent;
	background: transparent;
	border-radius: calc(var(--sm-radius-md) - 3px);
	padding: 8px 14px;
	font-weight: 500;
	font-size: 0.9rem;
	color: var(--sm-ink-soft);
	transition: background-color 120ms ease, color 120ms ease;
}

.sudoku-master-container .sm-diff-btn:hover {
	background: var(--sm-blue-100);
	color: var(--sm-blue-900);
}

.sudoku-master-container .sm-diff-btn.is-active {
	background: var(--sm-blue-600);
	color: var(--sm-white);
	box-shadow: 0 1px 3px rgba(37, 99, 235, 0.35);
}

.sudoku-master-container .sm-diff-btn:focus-visible,
.sudoku-master-container .sm-btn:focus-visible,
.sudoku-master-container .sm-num:focus-visible,
.sudoku-master-container .sm-cell:focus-visible {
	outline: 2px solid var(--sm-blue-500);
	outline-offset: 2px;
}

.sudoku-master-container .sm-stats {
	display: flex;
	gap: 10px;
}

.sudoku-master-container .sm-stat {
	display: flex;
	flex-direction: column;
	align-items: flex-end;
	background: var(--sm-blue-50);
	border: 1px solid var(--sm-border);
	border-radius: var(--sm-radius-md);
	padding: 6px 14px;
	min-width: 76px;
}

.sudoku-master-container .sm-stat-label {
	font-size: 0.72rem;
	text-transform: uppercase;
	letter-spacing: 0.04em;
	color: var(--sm-ink-soft);
}

.sudoku-master-container .sm-stat-value {
	font-size: 1rem;
	font-weight: 600;
	font-variant-numeric: tabular-nums;
	color: var(--sm-blue-900);
}

.sudoku-master-container .sm-stat-value.sm-is-warning {
	color: var(--sm-danger);
}

/* ------------------------------------------------------------------
 * Spielfeld
 * ---------------------------------------------------------------- */

.sudoku-master-container .sm-board-wrapper {
	position: relative;
	margin: 0 auto 20px;
	max-width: 460px;
}

.sudoku-master-container .sm-board {
	display: grid;
	grid-template-columns: repeat(9, 1fr);
	grid-template-rows: repeat(9, 1fr);
	width: 100%;
	aspect-ratio: 1 / 1;
	background: var(--sm-white);
	border: 2px solid var(--sm-blue-900);
	border-radius: var(--sm-radius-md);
	overflow: hidden;
	user-select: none;
	touch-action: manipulation;
}

.sudoku-master-container .sm-cell {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
	background: var(--sm-white);
	border: 1px solid var(--sm-border);
	font-size: clamp(0.95rem, 3.6vw, 1.3rem);
	font-weight: 500;
	color: var(--sm-blue-900);
	transition: background-color 100ms ease;
}

/* Dezente, aber eindeutige 3x3-Block-Trennlinien */
.sudoku-master-container .sm-cell[data-col="2"],
.sudoku-master-container .sm-cell[data-col="5"] {
	border-right: 2px solid var(--sm-blue-900);
}

.sudoku-master-container .sm-cell[data-col="0"],
.sudoku-master-container .sm-cell[data-col="3"],
.sudoku-master-container .sm-cell[data-col="6"] {
	border-left: 1px solid var(--sm-border);
}

.sudoku-master-container .sm-cell[data-row="2"],
.sudoku-master-container .sm-cell[data-row="5"] {
	border-bottom: 2px solid var(--sm-blue-900);
}

.sudoku-master-container .sm-cell.sm-cell--given {
	color: var(--sm-ink);
	font-weight: 700;
	background: var(--sm-blue-50);
}

.sudoku-master-container .sm-cell.sm-cell--selected {
	background: var(--sm-blue-100);
	box-shadow: inset 0 0 0 2px var(--sm-blue-600);
	z-index: 2;
}

.sudoku-master-container .sm-cell.sm-cell--peer {
	background: #f2f6ff;
}

.sudoku-master-container .sm-cell.sm-cell--same-value {
	background: #dbe8ff;
}

.sudoku-master-container .sm-cell.sm-cell--error {
	color: var(--sm-danger);
	background: var(--sm-danger-bg);
}

.sudoku-master-container .sm-cell.sm-cell--hint {
	animation: sm-hint-pulse 900ms ease;
}

@keyframes sm-hint-pulse {
	0% {
		background: var(--sm-blue-100);
	}
	100% {
		background: var(--sm-blue-50);
	}
}

.sudoku-master-container .sm-cell:not(.sm-cell--given):hover {
	background: #f7faff;
	cursor: pointer;
}

.sudoku-master-container .sm-cell--given {
	cursor: default;
}

/* Notiz-Modus: 3x3-Mini-Raster für Kandidaten innerhalb einer Zelle */
.sudoku-master-container .sm-notes {
	position: absolute;
	inset: 0;
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	grid-template-rows: repeat(3, 1fr);
	padding: 2px;
}

.sudoku-master-container .sm-notes span {
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: clamp(0.5rem, 1.7vw, 0.65rem);
	font-weight: 500;
	color: var(--sm-blue-600);
	line-height: 1;
}

/* Overlay für Sieg / Niederlage / Pause */
.sudoku-master-container .sm-overlay {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(15, 23, 42, 0.45);
	border-radius: var(--sm-radius-md);
	padding: 16px;
	z-index: 5;
}

.sudoku-master-container .sm-overlay-card {
	background: var(--sm-white);
	border-radius: var(--sm-radius-lg);
	border: 1px solid var(--sm-border);
	padding: 24px;
	max-width: 320px;
	width: 100%;
	text-align: center;
	box-shadow: var(--sm-shadow);
}

.sudoku-master-container .sm-overlay-title {
	margin: 0 0 8px;
	font-size: 1.15rem;
	font-weight: 700;
	color: var(--sm-blue-900);
}

.sudoku-master-container .sm-overlay-text {
	margin: 0 0 20px;
	font-size: 0.92rem;
	color: var(--sm-ink-soft);
}

.sudoku-master-container .sm-overlay-actions {
	display: flex;
	flex-direction: column;
	gap: 8px;
}

/* ------------------------------------------------------------------
 * Zahlenauswahl (Numpad)
 * ---------------------------------------------------------------- */

.sudoku-master-container .sm-numpad {
	display: grid;
	grid-template-columns: repeat(10, 1fr);
	gap: 8px;
	max-width: 460px;
	margin: 0 auto 20px;
}

.sudoku-master-container .sm-num {
	appearance: none;
	background: var(--sm-blue-50);
	border: 1px solid var(--sm-border);
	border-radius: var(--sm-radius-sm);
	padding: 10px 0;
	font-size: 1rem;
	font-weight: 600;
	color: var(--sm-blue-900);
	transition: background-color 120ms ease, transform 80ms ease;
}

.sudoku-master-container .sm-num:hover {
	background: var(--sm-blue-100);
}

.sudoku-master-container .sm-num:active {
	transform: scale(0.95);
}

.sudoku-master-container .sm-num.sm-num-erase {
	background: var(--sm-white);
	color: var(--sm-ink-soft);
}

.sudoku-master-container .sm-num:disabled {
	opacity: 0.4;
	cursor: not-allowed;
}

/* ------------------------------------------------------------------
 * Aktionsleiste
 * ---------------------------------------------------------------- */

.sudoku-master-container .sm-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	justify-content: center;
	border-top: 1px solid var(--sm-border);
	padding-top: 18px;
}

.sudoku-master-container .sm-btn {
	appearance: none;
	border-radius: var(--sm-radius-md);
	border: 1px solid var(--sm-border);
	background: var(--sm-white);
	padding: 10px 16px;
	font-weight: 600;
	font-size: 0.88rem;
	display: inline-flex;
	align-items: center;
	gap: 6px;
	color: var(--sm-ink);
	transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}

.sudoku-master-container .sm-btn:hover {
	background: var(--sm-blue-50);
	border-color: var(--sm-border-strong);
}

.sudoku-master-container .sm-btn-icon-glyph {
	font-size: 0.95rem;
	line-height: 1;
}

.sudoku-master-container .sm-btn-primary {
	background: var(--sm-blue-600);
	border-color: var(--sm-blue-600);
	color: var(--sm-white);
}

.sudoku-master-container .sm-btn-primary:hover {
	background: var(--sm-blue-700);
	border-color: var(--sm-blue-700);
}

.sudoku-master-container .sm-btn-secondary {
	background: var(--sm-white);
	border-color: var(--sm-border-strong);
	color: var(--sm-ink);
}

.sudoku-master-container .sm-btn[aria-pressed="true"] {
	background: var(--sm-blue-600);
	border-color: var(--sm-blue-600);
	color: var(--sm-white);
}

.sudoku-master-container .sm-btn:disabled {
	opacity: 0.45;
	cursor: not-allowed;
}

.sudoku-master-container .sm-noscript-hint {
	text-align: center;
	color: var(--sm-danger);
	font-size: 0.85rem;
}

/* ------------------------------------------------------------------
 * Responsive Anpassungen
 * ---------------------------------------------------------------- */

@media (max-width: 600px) {
	.sudoku-master-container {
		padding: 16px;
		border-radius: var(--sm-radius-md);
	}

	.sudoku-master-container .sm-toolbar {
		flex-direction: column;
		align-items: stretch;
	}

	.sudoku-master-container .sm-stats {
		justify-content: space-between;
	}

	.sudoku-master-container .sm-stat {
		align-items: center;
		flex: 1;
	}

	.sudoku-master-container .sm-difficulty {
		justify-content: space-between;
	}

	.sudoku-master-container .sm-diff-btn {
		flex: 1;
		padding: 8px 4px;
		font-size: 0.82rem;
		text-align: center;
	}

	.sudoku-master-container .sm-actions {
		gap: 8px;
	}

	.sudoku-master-container .sm-btn {
		flex: 1 1 calc(50% - 8px);
		justify-content: center;
		padding: 10px 8px;
		font-size: 0.82rem;
	}

	.sudoku-master-container .sm-btn-primary {
		flex-basis: 100%;
	}
}

@media (max-width: 380px) {
	.sudoku-master-container .sm-numpad {
		gap: 5px;
	}

	.sudoku-master-container .sm-num {
		padding: 8px 0;
		font-size: 0.9rem;
	}
}

/* Reduzierte Bewegung respektieren */
@media (prefers-reduced-motion: reduce) {
	.sudoku-master-container .sm-cell.sm-cell--hint {
		animation: none;
	}

	.sudoku-master-container * {
		transition: none !important;
	}
}