@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

:root {
	--bg-primary: #1a1a1a;
	--bg-card: #242424;
	--bg-hover: #2e2e2e;
	--border-subtle: rgba(255, 255, 255, 0.08);
	--text-primary: #e0e0e0;
	--text-secondary: #999;
	--text-muted: #666;
	--white-eval: #e0e0e0;
	--black-eval: #2a2a2a;
	--square-light: #f0d9b5;
	--square-dark: #b58863;
	--font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
	--font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

body {
	background-color: var(--bg-primary);
	font-family: var(--font-sans);
	color: var(--text-primary);
	min-height: 100vh;
	overflow: hidden;
}

/* ===== APP LAYOUT ===== */
.app-layout {
	display: flex;
	justify-content: center;
	align-items: center;
	height: 100vh;
	gap: 24px;
	padding: 24px;
}

/* ===== PANELS (shared) ===== */
.info-panel,
.moves-panel {
	width: 260px;
	height: 480px;
	background: var(--bg-card);
	border: 1px solid var(--border-subtle);
	border-radius: 12px;
	display: flex;
	flex-direction: column;
	overflow: hidden;
}

.panel-section {
	padding: 16px;
	border-bottom: 1px solid var(--border-subtle);
}

.panel-section:last-child {
	border-bottom: none;
}

.section-header {
	display: flex;
	align-items: center;
	gap: 8px;
	font-size: 12px;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--text-secondary);
	margin-bottom: 12px;
}

.section-icon {
	font-size: 14px;
}

/* ===== EVALUATION ===== */
.eval-display {
	display: flex;
	align-items: center;
	gap: 12px;
	margin-bottom: 8px;
}

.eval-bar-container {
	flex: 1;
	height: 24px;
	background: var(--black-eval);
	border-radius: 4px;
	overflow: hidden;
	position: relative;
	border: 1px solid var(--border-subtle);
}

.eval-bar-fill {
	height: 100%;
	width: 50%;
	background: var(--white-eval);
	border-radius: 3px 0 0 3px;
	transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
	position: relative;
}

.eval-value {
	font-family: var(--font-mono);
	font-size: 18px;
	font-weight: 700;
	min-width: 60px;
	text-align: right;
	color: var(--text-primary);
}

.eval-label {
	font-size: 12px;
	color: var(--text-muted);
	text-align: center;
}

/* ===== ENGINE STATS ===== */
.stat-row {
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 6px 0;
}

.stat-row + .stat-row {
	border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.stat-label {
	font-size: 13px;
	color: var(--text-secondary);
}

.stat-value {
	font-family: var(--font-mono);
	font-size: 13px;
	font-weight: 500;
	color: var(--text-primary);
}

/* ===== TURN INDICATOR ===== */
.status-section {
	padding: 12px 16px;
}

.turn-indicator {
	display: flex;
	align-items: center;
	gap: 10px;
	font-size: 14px;
	font-weight: 500;
	color: var(--text-primary);
}

.turn-dot {
	width: 12px;
	height: 12px;
	border-radius: 50%;
	border: 1px solid var(--border-subtle);
}

.white-dot {
	background: var(--white-eval);
}

.black-dot {
	background: #444;
}

/* ===== BOARD ===== */
.board-wrapper {
	flex-shrink: 0;
}

.container {
	display: flex;
	justify-content: center;
	align-items: center;
}

#board {
	display: grid;
	grid-template-columns: repeat(8, 60px);
	grid-template-rows: repeat(8, 60px);
	border-radius: 2px;
	overflow: hidden;
	box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.square {
	width: 60px;
	height: 60px;
	display: flex;
	justify-content: center;
	align-items: center;
	background-repeat: no-repeat;
	position: relative;
}

.piece {
	width: 100%;
	height: 100%;
	background-repeat: no-repeat;
	background-size: 360px 120px;
	overflow: hidden;
	z-index: 20;
	display: block;
}

.highlight::before {
	content: "";
	position: absolute;
	width: 18px;
	height: 18px;
	left: 50%;
	top: 50%;
	transform: translate(-50%, -50%);
	border-radius: 50%;
	background: rgba(0, 0, 0, 0.28);
	pointer-events: none;
}

.encircle::before {
	content: "";
	position: absolute;
	width: 59px;
	height: 59px;
	left: 50%;
	top: 50%;
	transform: translate(-50%, -50%);
	border-radius: 50%;
	background: radial-gradient(
		circle,
		rgba(0, 0, 0, 0.06) 0%,
		rgba(0, 0, 0, 0.08) 45%,
		rgba(0, 0, 0, 0.16) 75%,
		rgba(0, 0, 0, 0.2) 100%
	);
	pointer-events: none;
	z-index: 1;
}

.last-move::after {
	content: "";
	position: absolute;
	width: 100%;
	height: 100%;
	left: 0;
	top: 0;
	background-color: rgba(255, 255, 0, 0.3);
	pointer-events: none;
	z-index: 3;
}

@keyframes red-flash {
	0%, 100% { background-color: transparent; }
	20%, 50% { background-color: rgba(255, 0, 0, 0.3); }
}

@keyframes shake {
	0%, 100% { transform: translateX(0); }
	20% { transform: translateX(-2px); }
	40% { transform: translateX(2px); }
	60% { transform: translateX(-1px); }
	80% { transform: translateX(1px); }
}

.wrong-selection {
	animation:
		shake 0.4s ease-in-out,
		red-flash 0.4s ease-in-out;
}

.light {
	background-color: var(--square-light);
}
.dark {
	background-color: var(--square-dark);
}

/* ===== MOVE HISTORY ===== */
.moves-panel .panel-section {
	display: flex;
	flex-direction: column;
	flex: 1;
	overflow: hidden;
	border-bottom: none;
}

.moves-list {
	flex: 1;
	overflow-y: auto;
	overflow-x: hidden;
	scrollbar-width: thin;
	scrollbar-color: var(--bg-hover) transparent;
}

.moves-list::-webkit-scrollbar {
	width: 4px;
}

.moves-list::-webkit-scrollbar-track {
	background: transparent;
}

.moves-list::-webkit-scrollbar-thumb {
	background: var(--bg-hover);
	border-radius: 4px;
}

.moves-placeholder {
	font-size: 13px;
	color: var(--text-muted);
	text-align: center;
	padding: 40px 0;
	font-style: italic;
}

.move-row {
	display: grid;
	grid-template-columns: 32px 1fr 1fr;
	gap: 0;
	align-items: center;
	font-family: var(--font-mono);
	font-size: 13px;
	border-radius: 4px;
	transition: background 0.15s ease;
}

.move-row:hover {
	background: var(--bg-hover);
}

.move-number {
	color: var(--text-muted);
	font-size: 11px;
	text-align: center;
	padding: 6px 2px;
}

.move-white,
.move-black {
	padding: 6px 8px;
	border-radius: 4px;
	cursor: default;
}

.move-white {
	color: var(--text-primary);
}

.move-black {
	color: var(--text-secondary);
}

.move-white:hover,
.move-black:hover {
	background: rgba(255, 255, 255, 0.06);
	color: #fff;
}

/* ===== PROMOTION MODAL ===== */
#promotion-modal {
	display: none;
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background-color: rgba(0, 0, 0, 0.6);
	backdrop-filter: blur(4px);
	z-index: 1000;
}

#promotion-options {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	display: flex;
	gap: 10px;
	background: var(--bg-card);
	border: 1px solid var(--border-subtle);
	padding: 20px;
	border-radius: 12px;
	box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

.promotion-piece {
	width: 60px;
	height: 60px;
	cursor: pointer;
	border-radius: 6px;
	transition: background 0.15s ease;
}

.promotion-piece:hover {
	background: var(--bg-hover);
}

/* ===== GAME OVER MODAL ===== */
.game-over-modal {
	position: fixed;
	inset: 0;
	display: none;
	justify-content: center;
	align-items: center;
	background: rgba(0, 0, 0, 0.6);
	backdrop-filter: blur(6px);
	z-index: 1000;
}

.game-over-card {
	width: 360px;
	padding: 32px;
	border-radius: 12px;
	background: var(--bg-card);
	border: 1px solid var(--border-subtle);
	text-align: center;
	box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
	animation: modal-enter 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modal-enter {
	from {
		opacity: 0;
		transform: scale(0.9) translateY(20px);
	}
	to {
		opacity: 1;
		transform: scale(1) translateY(0);
	}
}

.game-over-card h1 {
	font-size: 28px;
	font-weight: 700;
	margin-bottom: 8px;
	color: var(--text-primary);
}

.game-over-card p {
	margin-bottom: 28px;
	font-size: 16px;
	color: var(--text-secondary);
}

.game-over-buttons {
	display: flex;
	gap: 12px;
	justify-content: center;
}

.btn {
	padding: 10px 24px;
	font-size: 14px;
	font-weight: 600;
	font-family: var(--font-sans);
	border: none;
	border-radius: 8px;
	cursor: pointer;
	transition: all 0.2s ease;
}

.btn-primary {
	background: #fff;
	color: #1a1a1a;
}

.btn-primary:hover {
	background: #e0e0e0;
	transform: translateY(-1px);
}

.btn-secondary {
	background: var(--bg-hover);
	color: var(--text-primary);
	border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
	background: rgba(255, 255, 255, 0.08);
	transform: translateY(-1px);
}

/* ===== THINKING INDICATOR ===== */
.thinking-badge {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	padding: 4px 10px;
	background: rgba(255, 255, 255, 0.06);
	border: 1px solid var(--border-subtle);
	border-radius: 20px;
	font-size: 12px;
	color: var(--text-secondary);
	animation: thinking-pulse 1.5s ease-in-out infinite;
}

@keyframes thinking-pulse {
	0%, 100% { opacity: 0.7; }
	50% { opacity: 1; }
}

.thinking-dots span {
	display: inline-block;
	width: 4px;
	height: 4px;
	background: var(--text-secondary);
	border-radius: 50%;
	animation: dot-bounce 1.4s ease-in-out infinite;
}

.thinking-dots span:nth-child(2) { animation-delay: 0.2s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dot-bounce {
	0%, 80%, 100% { transform: translateY(0); }
	40% { transform: translateY(-4px); }
}

/* ===== VIEW ALL LINK ===== */
.view-all-link {
	display: block;
	text-align: right;
	font-size: 11px;
	color: var(--text-muted);
	cursor: pointer;
	margin-top: 8px;
	transition: color 0.15s ease;
}

.view-all-link:hover {
	color: var(--text-primary);
}

/* ===== TIMING STATS MODAL ===== */
.timing-modal {
	position: fixed;
	inset: 0;
	display: none;
	justify-content: center;
	align-items: center;
	background: rgba(0, 0, 0, 0.6);
	backdrop-filter: blur(6px);
	z-index: 1000;
}

.timing-card {
	width: 440px;
	max-height: 80vh;
	background: var(--bg-card);
	border: 1px solid var(--border-subtle);
	border-radius: 12px;
	display: flex;
	flex-direction: column;
	overflow: hidden;
	box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
	animation: modal-enter 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.timing-header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 16px 20px;
	border-bottom: 1px solid var(--border-subtle);
	font-size: 14px;
	font-weight: 600;
	color: var(--text-primary);
}

.timing-close {
	background: none;
	border: none;
	color: var(--text-muted);
	font-size: 16px;
	cursor: pointer;
	padding: 4px 8px;
	border-radius: 4px;
	transition: all 0.15s ease;
}

.timing-close:hover {
	color: var(--text-primary);
	background: var(--bg-hover);
}

.timing-body {
	padding: 20px;
	overflow-y: auto;
	scrollbar-width: thin;
	scrollbar-color: var(--bg-hover) transparent;
}

/* Stats grid — 2x3 */
.timing-stats-grid {
	display: grid;
	grid-template-columns: 1fr 1fr 1fr;
	gap: 10px;
	margin-bottom: 20px;
}

.timing-stat-card {
	background: var(--bg-primary);
	border: 1px solid var(--border-subtle);
	border-radius: 8px;
	padding: 12px;
	text-align: center;
}

.timing-stat-label {
	font-size: 11px;
	font-weight: 500;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--text-muted);
	margin-bottom: 4px;
}

.timing-stat-value {
	font-family: var(--font-mono);
	font-size: 16px;
	font-weight: 700;
	color: var(--text-primary);
}

/* Individual timings list */
.timing-list-header {
	font-size: 12px;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--text-muted);
	margin-bottom: 8px;
}

.timing-list {
	max-height: 200px;
	overflow-y: auto;
	scrollbar-width: thin;
	scrollbar-color: var(--bg-hover) transparent;
}

.timing-list-row {
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 6px 8px;
	border-radius: 4px;
	font-family: var(--font-mono);
	font-size: 13px;
	transition: background 0.1s ease;
}

.timing-list-row:hover {
	background: var(--bg-hover);
}

.timing-list-move {
	color: var(--text-secondary);
}

.timing-list-time {
	color: var(--text-primary);
	font-weight: 500;
}

.timing-empty {
	color: var(--text-muted);
	font-size: 13px;
	text-align: center;
	padding: 20px 0;
	font-style: italic;
}