.pzk-solver {
	--solver-ink: #111;
	--solver-muted: #6b7280;
	--solver-blue: #205f8f;
	--solver-blue-hover: #174b73;
	--solver-good: #15803d;
	--solver-warn: #9a5b00;
	--solver-bad: #b91c1c;
	--solver-grid: #141617;
	--solver-thin: #555;
	font-family: "Inter", sans-serif;
}

.pzk-solver-stack {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 1.25rem;
}

.pzk-solver-board-wrap {
	width: min(100%, 34rem);
	display: flex;
	justify-content: center;
}

.pzk-solver .sudoku-board {
	width: min(100%, 34rem);
	text-align: center;
	line-height: 0;
	margin: 0 auto;
}

.pzk-solver .sudoku-board br {
	display: none;
}

.pzk-solver .sudoku-board-cell {
	box-sizing: border-box;
	display: inline-block;
	position: relative;
	width: 11.111111%;
	max-width: 11.111111%;
	aspect-ratio: 1 / 1;
	border: 1px solid var(--solver-thin);
	background: #fff;
	vertical-align: top;
}

.pzk-solver [data-board-size="9"].sudoku-board .sudoku-board-cell:nth-of-type(9n+1) {
	border-left-width: 4px;
	border-left-color: var(--solver-grid);
}

.pzk-solver [data-board-size="9"].sudoku-board .sudoku-board-cell:nth-of-type(n):nth-of-type(-n+9) {
	border-top-width: 4px;
	border-top-color: var(--solver-grid);
}

.pzk-solver [data-board-size="9"].sudoku-board .sudoku-board-cell:nth-of-type(3n) {
	border-right-width: 4px;
	border-right-color: var(--solver-grid);
}

.pzk-solver [data-board-size="9"].sudoku-board .sudoku-board-cell:nth-of-type(n+19):nth-of-type(-n+27),
.pzk-solver [data-board-size="9"].sudoku-board .sudoku-board-cell:nth-of-type(n+46):nth-of-type(-n+54),
.pzk-solver [data-board-size="9"].sudoku-board .sudoku-board-cell:nth-of-type(n+73):nth-of-type(-n+81) {
	border-bottom-width: 4px;
	border-bottom-color: var(--solver-grid);
}

.pzk-solver .sudoku-board-cell input {
	appearance: none;
	box-sizing: border-box;
	background: transparent;
	border: 0;
	border-radius: 0;
	color: var(--solver-ink);
	font-family: "Inter", sans-serif;
	font-size: clamp(1.25rem, 4.4vw, 1.95rem);
	font-weight: 600;
	height: 100%;
	line-height: 1;
	max-width: 100%;
	outline: none;
	padding: 0;
	position: relative;
	text-align: center;
	width: 100%;
	z-index: 1;
}

.pzk-solver .sudoku-board-cell input:focus {
	background: rgba(32, 95, 143, 0.09);
	box-shadow: inset 0 0 0 3px #ef4444;
}

.pzk-solver .sudoku-board-cell .highlight-val {
	color: #205f8f;
}

.pzk-solver .sudoku-board-cell .board-cell--error {
	color: var(--solver-bad);
}

.pzk-solver .sudoku-board-cell .candidates {
	bottom: 0;
	display: none;
	font-family: "Inter", sans-serif;
	font-size: clamp(0.48rem, 1.2vw, 0.72rem);
	font-weight: 500;
	left: 0;
	letter-spacing: 0;
	line-height: 1;
	padding: 0.16rem;
	position: absolute;
	right: 0;
	text-align: center;
	top: 0;
	z-index: 0;
}

.pzk-solver .showCandidates .candidates {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	grid-template-rows: repeat(3, minmax(0, 1fr));
	align-items: center;
}

.pzk-solver .sudoku-board .candidates div {
	align-items: center;
	display: flex;
	justify-content: center;
	line-height: 1;
	text-align: center;
	min-width: 0;
}

.pzk-solver .candidate--highlight {
	background-color: #dbeafe;
}

.pzk-solver .candidate--to-remove {
	background-color: var(--solver-bad);
	color: #fff;
}

.pzk-solver-menu {
	width: min(100%, 34rem);
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 1rem;
}

.pzk-solver .status,
.pzk-solver-status {
	color: var(--solver-muted);
	font-size: 0.96rem;
	line-height: 1.35;
	margin: 0;
	text-align: center;
}

.pzk-solver-status.is-ok {
	color: var(--solver-good);
}

.pzk-solver-status.is-warn {
	color: var(--solver-warn);
}

.pzk-solver-status.is-bad {
	color: var(--solver-bad);
}

.pzk-solver .pzk-controls {
	display: flex;
	flex-direction: column;
	gap: 0.75rem;
	align-items: center;
}

.pzk-solver .pzk-control-row {
	display: flex;
	flex-wrap: wrap;
	gap: 0.75rem;
	justify-content: center;
}

.pzk-solver-button,
.pzk-solver .pzk-control-button {
	align-items: center;
	appearance: none;
	background: var(--solver-blue);
	border: 1px solid var(--solver-blue);
	border-radius: 0.25rem;
	color: #fff;
	cursor: pointer;
	display: inline-flex;
	font-size: 0.96rem;
	font-weight: 600;
	gap: 0.5rem;
	justify-content: center;
	line-height: 1.2;
	min-height: 2.85rem;
	min-width: 9.5rem;
	padding: 0.62rem 1rem;
	text-decoration: none;
	transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.pzk-solver-button:hover,
.pzk-solver .pzk-control-button:hover {
	background: var(--solver-blue-hover);
	border-color: var(--solver-blue-hover);
	color: #fff;
	transform: translateY(-1px);
}

.pzk-solver .pzk-control-icon {
	font-size: 0.95rem;
	line-height: 1;
}

.pzk-solver-toggle {
	align-items: center;
	background: #fff;
	border: 1px solid #111;
	border-radius: 0.25rem;
	color: var(--solver-ink);
	cursor: pointer;
	display: inline-flex;
	font-weight: 600;
	gap: 0.5rem;
	min-height: 2.85rem;
	min-width: 9.5rem;
	justify-content: center;
	padding: 0.62rem 1rem;
}

.pzk-solver-toggle input {
	accent-color: var(--solver-blue);
}

@media (max-width: 767.98px) {
	.pzk-solver-board-wrap,
	.pzk-solver .sudoku-board,
	.pzk-solver-menu {
		width: 100%;
	}

	.pzk-solver-button,
	.pzk-solver .pzk-control-button,
	.pzk-solver-toggle {
		min-width: 8.3rem;
	}
}