/* Global Settings & CSS Variables */
:root {
  --bg-primary: #0a0f1d;
  --bg-secondary: #111827;
  --bg-card: rgba(31, 41, 55, 0.45);
  --border-color: rgba(255, 255, 255, 0.08);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  
  --primary-color: #6366f1; /* Indigo */
  --primary-hover: #4f46e5;
  --accent-color: #38bdf8; /* Sky blue */
  --accent-green: #10b981; /* Emerald */
  
  /* Board Colors */
  --board-light: #f0d9b5;
  --board-dark: #b58863;
  --board-border: #8b5a2b;
  --board-coordinate: rgba(0, 0, 0, 0.6);
  
  --font-main: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --transition-speed: 0.25s;
  --shadow-premium: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
  --glass-blur: blur(12px);
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(at 0% 0%, hsla(253, 16%, 7%, 1) 0, transparent 50%), 
    radial-gradient(at 50% 0%, hsla(225, 39%, 30%, 0.15) 0, transparent 50%),
    radial-gradient(at 100% 0%, hsla(260, 80%, 40%, 0.08) 0, transparent 40%);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Layout Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 1.5rem;
  max-width: 1600px;
  margin: 0 auto;
  width: 100%;
  flex-grow: 1;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-premium);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-icon {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.logo-text h1 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.1;
}

.logo-text h1 span {
  color: var(--accent-color);
  background: linear-gradient(to right, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-text p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.header-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: rgba(0, 0, 0, 0.25);
  padding: 0.5rem 1rem;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.green {
  background-color: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 340px 1fr 380px;
  gap: 1.5rem;
  flex-grow: 1;
  margin-bottom: 1.5rem;
  align-items: stretch;
}

/* Panels */
.panel {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-premium);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-color var(--transition-speed);
}

.panel:hover {
  border-color: rgba(99, 102, 241, 0.2);
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.1);
}

.panel-header i {
  color: var(--accent-color);
  font-size: 1.1rem;
}

.panel-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.panel-body {
  padding: 1.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.panel-body.scrollable-y {
  overflow-y: auto;
  max-height: calc(100vh - 220px);
}

.panel-divider {
  border: 0;
  height: 1px;
  background: var(--border-color);
  margin: 0.5rem 0;
}

/* Forms & Inputs */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-row {
  display: flex;
  gap: 1rem;
}

.form-group.half {
  flex: 1;
}

label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
}

.input-wrapper, .select-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper i, .select-wrapper i {
  position: absolute;
  left: 1rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  pointer-events: none;
}

input[type="text"], select {
  width: 100%;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 0.95rem;
  transition: all var(--transition-speed);
  outline: none;
}

input[type="text"]:focus, select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  background: rgba(0, 0, 0, 0.4);
}

/* Select wrapper styling for custom arrow */
.select-wrapper::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  right: 1rem;
  color: var(--text-secondary);
  font-size: 0.8rem;
  pointer-events: none;
}

select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 2.5rem;
}

/* Checkbox group styling */
.checkbox-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  background: rgba(0, 0, 0, 0.15);
  padding: 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--border-color);
}

.checkbox-container {
  display: flex;
  align-items: center;
  position: relative;
  padding-left: 28px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-primary);
  user-select: none;
  font-weight: 500;
}

.checkbox-container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkmark {
  position: absolute;
  top: 0;
  left: 0;
  height: 18px;
  width: 18px;
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  transition: all var(--transition-speed);
}

.checkbox-container:hover input ~ .checkmark {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--primary-color);
}

.checkbox-container input:checked ~ .checkmark {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
  display: block;
}

.checkbox-container .checkmark:after {
  left: 6px;
  top: 2px;
  width: 4px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-speed);
  border: none;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  color: #fff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-icon {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: 8px;
  padding: 0;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent-color);
}

.btn-icon.active {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--primary-color);
  color: var(--accent-color);
}

/* Board Header Controls */
.board-controls {
  margin-left: auto;
  display: flex;
  gap: 0.5rem;
}

/* Statistics Widgets */
.stats-section h3 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.stat-card {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.25rem;
}

.stat-card.span-2 {
  grid-column: span 2;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.5px;
  font-family: var(--font-main);
}

.stat-comparison {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-top: 0.25rem;
}

.stat-subtext {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Loader Styling */
.loader-container {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  margin-top: 0.5rem;
}

.loader-container.hidden {
  display: none;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  border-top-color: var(--accent-color);
  animation: spin 1s linear infinite;
  flex-shrink: 0;
}

.loader-text {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex-grow: 1;
}

.loader-text span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
}

.progress-bar-bg {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
  width: 100%;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  width: 0%;
  transition: width 0.1s ease;
  border-radius: 3px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Center Panel: Chessboard Area */
.board-container-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  height: 100%;
}

.board-wrapper {
  position: relative;
  width: 100%;
  max-width: 500px;
  aspect-ratio: 1 / 1;
  background: var(--board-border);
  padding: 12px;
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.chessboard {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  width: 100%;
  height: 100%;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
}

.board-square {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  cursor: pointer;
  aspect-ratio: 1 / 1;
}

/* Board Square Colors */
.board-square.light {
  background-color: var(--board-light);
}

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

/* Chess Coordinates */
.board-square .coordinate {
  position: absolute;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--board-coordinate);
  pointer-events: none;
  opacity: 0.7;
}

.board-square .coordinate.rank {
  left: 4px;
  top: 4px;
}

.board-square .coordinate.file {
  right: 4px;
  bottom: 4px;
}

/* Heat Overlay */
.heat-overlay {
  position: absolute;
  top: 4%;
  left: 4%;
  right: 4%;
  bottom: 4%;
  border-radius: 4px;
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 1;
}

/* Hover effects */
.board-square:hover {
  z-index: 5;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.3);
}

.board-square:hover .heat-overlay {
  transform: scale(1.05);
  box-shadow: 0 0 10px currentColor;
}

/* Selection State */
.board-square.selected {
  z-index: 4;
  box-shadow: inset 0 0 0 3px var(--accent-color) !important;
}

/* Ghost outline for selected piece on squares */
.board-square::after {
  content: '';
  position: absolute;
  width: 50%;
  height: 50%;
  opacity: 0;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  pointer-events: none;
  z-index: 2;
  transition: opacity 0.2s ease;
}

/* Piece Selector Tabs */
.piece-selector-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  background: rgba(0, 0, 0, 0.2);
  padding: 0.5rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  width: 100%;
  max-width: 500px;
}

.piece-tab {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0.6rem 0.25rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.piece-tab i {
  font-size: 1.2rem;
}

.piece-tab span {
  font-size: 0.7rem;
  font-weight: 600;
}

.piece-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.piece-tab.active {
  color: #fff;
  background: var(--primary-color);
  box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}

/* Right Panel: Insights & Square Inspector */
.inspector-card {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  min-height: 180px;
  display: flex;
  flex-direction: column;
}

.inspector-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: var(--text-secondary);
  text-align: center;
  height: 100%;
  flex-grow: 1;
}

.inspector-empty i {
  font-size: 2rem;
  opacity: 0.4;
  color: var(--accent-color);
}

.inspector-empty p {
  font-size: 0.85rem;
  max-width: 200px;
  line-height: 1.4;
}

.inspector-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  height: 100%;
  flex-grow: 1;
}

.inspector-header-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.square-badge {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: #fff;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  box-shadow: 0 4px 10px rgba(99, 102, 241, 0.25);
}

.inspect-totals {
  display: flex;
  flex-direction: column;
}

.inspect-totals span:first-child {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

.inspect-totals .subtext {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.games-list-section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-grow: 1;
}

.games-list-section h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  font-weight: 600;
  letter-spacing: 0.5px;
}

.games-scroll {
  max-height: 250px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-right: 0.25rem;
}

.game-item-row {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-speed);
}

.game-item-row:hover {
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateX(2px);
}

.game-details {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.game-players {
  font-size: 0.85rem;
  font-weight: 600;
}

.game-players span {
  color: var(--text-secondary);
  font-weight: 400;
  margin: 0 0.25rem;
}

.game-meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  gap: 0.5rem;
}

.game-meta span.win {
  color: var(--accent-green);
  font-weight: 600;
}

.game-meta span.loss {
  color: #ef4444;
  font-weight: 600;
}

.game-link-icon {
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: color var(--transition-speed);
}

.game-item-row:hover .game-link-icon {
  color: var(--accent-color);
}

/* Distribution Chart styling */
.chart-container-wrapper h3 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.chart-box {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem;
  height: 220px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Footer styling */
.app-footer {
  text-align: center;
  padding: 1.5rem 0;
  color: var(--text-secondary);
  font-size: 0.8rem;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

/* Utilities */
.hidden {
  display: none !important;
}

/* Responsive adjustments */
@media (max-width: 1200px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .panel-body.scrollable-y {
    max-height: none;
  }
  
  .app-container {
    padding: 1rem;
  }
  
  .board-wrapper {
    max-width: 450px;
  }
}