/**
 * Sudoku Stylesheet for EXS.LV
 */

#sudoku-container {
	padding: 15px;
	background: #f8fafc;
	border-radius: 8px;
}

.sdk-wrapper {
	max-width: 600px;
	margin: 0 auto;
	display: flex;
	flex-direction: column;
	align-items: center;
}

.sdk-toolbar {
	display: flex;
	justify-content: space-between;
	align-items: center;
	width: 100%;
	margin-bottom: 15px;
}

.sdk-diff-selector label {
	font-weight: bold;
	margin-right: 8px;
	color: #334155;
}

.sdk-select {
	padding: 6px 12px;
	border: 1px solid #cbd5e1;
	border-radius: 6px;
	background: #ffffff;
	font-weight: bold;
	color: #0f172a;
	cursor: pointer;
}

.sdk-stats {
	display: flex;
	gap: 10px;
}

.sdk-stat-badge {
	background: #e2e8f0;
	padding: 6px 12px;
	border-radius: 6px;
	font-size: 13px;
	color: #334155;
}

/* 9x9 Sudoku Board */
.sdk-board-wrapper {
	background: #0f172a;
	padding: 4px;
	border-radius: 8px;
	box-shadow: 0 4px 12px rgba(0,0,0,0.15);
	margin-bottom: 15px;
}

.sdk-board {
	display: grid;
	grid-template-columns: repeat(9, 44px);
	grid-template-rows: repeat(9, 44px);
	gap: 1px;
	background: #94a3b8;
	border: 2px solid #0f172a;
	user-select: none;
}

.sdk-cell {
	width: 44px;
	height: 44px;
	background: #ffffff;
	display: flex;
	justify-content: center;
	align-items: center;
	font-size: 20px;
	font-weight: bold;
	color: #0f172a;
	cursor: pointer;
	position: relative;
	transition: background 0.1s, border-color 0.1s;
	box-sizing: border-box;
}

/* Thick 3x3 Block Borders */
.sdk-cell[data-c="2"],
.sdk-cell[data-c="5"] {
	border-right: 3px solid #0f172a !important;
}

.sdk-cell[data-r="2"],
.sdk-cell[data-r="5"] {
	border-bottom: 3px solid #0f172a !important;
}

/* Cell States & Highlights */
.sdk-given {
	background: #f1f5f9;
	color: #0f172a;
	font-weight: 900;
}

.sdk-user {
	color: #2563eb;
}

.sdk-related {
	background: #e0f2fe;
}

.sdk-match {
	background: #bae6fd;
}

.sdk-selected {
	background: #60a5fa !important;
	color: #ffffff !important;
}

.sdk-error {
	background: #fca5a5 !important;
	color: #991b1b !important;
}

/* Pencil Candidate Grid */
.sdk-pencil-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	grid-template-rows: repeat(3, 1fr);
	width: 100%;
	height: 100%;
	padding: 2px;
	box-sizing: border-box;
}

.sdk-p-num {
	font-size: 10px;
	font-weight: 600;
	color: #64748b;
	display: flex;
	justify-content: center;
	align-items: center;
	line-height: 1;
}

/* Action Controls & Numpad */
.sdk-action-bar {
	display: flex;
	gap: 8px;
	flex-wrap: wrap;
	justify-content: center;
	margin-bottom: 15px;
	width: 100%;
}

.sdk-btn {
	padding: 8px 14px;
	font-size: 13px;
	font-weight: bold;
	border-radius: 6px;
	border: 1px solid #cbd5e1;
	background: #ffffff;
	color: #334155;
	cursor: pointer;
	transition: background 0.15s, border-color 0.15s;
}

.sdk-btn-primary {
	background: #3b82f6;
	color: #ffffff;
	border-color: #2563eb;
}

.sdk-btn-primary:hover {
	background: #2563eb;
}

.sdk-btn-secondary.active {
	background: #10b981;
	color: #ffffff;
	border-color: #059669;
}

.sdk-numpad {
	display: flex;
	gap: 6px;
	margin-bottom: 15px;
	width: 100%;
	justify-content: center;
}

.sdk-num-btn {
	width: 44px;
	height: 44px;
	font-size: 18px;
	font-weight: bold;
	border-radius: 8px;
	border: 1px solid #cbd5e1;
	background: #ffffff;
	color: #0f172a;
	cursor: pointer;
	box-shadow: 0 2px 4px rgba(0,0,0,0.05);
	transition: transform 0.08s, background 0.1s;
}

.sdk-num-btn:active {
	transform: scale(0.94);
	background: #e2e8f0;
}

/* Guide Box */
.sdk-guide-box {
	margin-top: 15px;
	padding: 15px;
	background: #ffffff;
	border: 1px solid #e2e8f0;
	border-radius: 8px;
	color: #475569;
	width: 100%;
	box-sizing: border-box;
}

.sdk-guide-box h4 {
	margin: 0 0 10px 0;
	color: #0f172a;
	font-size: 15px;
}

.sdk-guide-box ul {
	margin: 0;
	padding-left: 20px;
}

.sdk-guide-box li {
	margin-bottom: 6px;
	font-size: 13px;
}

/* Responsive Scaling */
@media (max-width: 480px) {
	.sdk-board {
		grid-template-columns: repeat(9, 36px);
		grid-template-rows: repeat(9, 36px);
	}
	.sdk-cell {
		width: 36px;
		height: 36px;
		font-size: 16px;
	}
	.sdk-num-btn {
		width: 36px;
		height: 36px;
		font-size: 16px;
	}
}

/* Dark Mode Overrides */
@media (prefers-color-scheme: dark) {
	#sudoku-container {
		background: #181c24;
	}

	.sdk-diff-selector label {
		color: #e2e8f0;
	}

	.sdk-select {
		background: #252d3a;
		border-color: #3b4658;
		color: #f8fafc;
	}

	.sdk-stat-badge {
		background: #252d3a;
		color: #cbd5e1;
	}

	.sdk-board-wrapper {
		background: #090d16;
	}

	.sdk-board {
		background: #334155;
		border-color: #090d16;
	}

	.sdk-cell {
		background: #1e293b;
		color: #f8fafc;
	}

	.sdk-cell[data-c="2"],
	.sdk-cell[data-c="5"] {
		border-right: 3px solid #090d16 !important;
	}

	.sdk-cell[data-r="2"],
	.sdk-cell[data-r="5"] {
		border-bottom: 3px solid #090d16 !important;
	}

	.sdk-given {
		background: #334155;
		color: #f8fafc;
	}

	.sdk-user {
		color: #60a5fa;
	}

	.sdk-related {
		background: #1e3a8a;
	}

	.sdk-match {
		background: #1d4ed8;
	}

	.sdk-selected {
		background: #3b82f6 !important;
		color: #ffffff !important;
	}

	.sdk-error {
		background: #991b1b !important;
		color: #fca5a5 !important;
	}

	.sdk-p-num {
		color: #94a3b8;
	}

	.sdk-btn {
		background: #252d3a;
		border-color: #3b4658;
		color: #e2e8f0;
	}

	.sdk-num-btn {
		background: #252d3a;
		border-color: #3b4658;
		color: #f8fafc;
	}

	.sdk-guide-box {
		background: #1e2430;
		border-color: #2e3848;
		color: #cbd5e1;
	}

	.sdk-guide-box h4 {
		color: #38bdf8;
	}
}