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

:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-panel: #0f3460;
  --text-primary: #eee;
  --text-secondary: #aaa;
  --accent-primary: #e94560;
  --accent-secondary: #00adb5;
  --player1-color: #4ecca3;
  --player2-color: #e94560;
  --player3-color: #f9ed69;
  --player4-color: #00adb5;
  --blocked-color: #2a2a4a;
  --empty-color: #3a5a6a;
  --highlight-color: rgba(255, 255, 255, 0.3);
  --selected-color: rgba(233, 69, 96, 0.5);
  --target-color: rgba(78, 204, 163, 0.5);
  --hex-stroke: #1a1a2e;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow: hidden;
}

/* Start Screen */
.start-screen {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: var(--bg-primary);
}

.start-panel {
  background: var(--bg-secondary);
  padding: 40px;
  border-radius: 12px;
  text-align: center;
  max-width: 450px;
  width: 90%;
  border: 2px solid var(--accent-primary);
}

.start-panel h1 {
  font-size: 2.5rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 4px;
  margin-bottom: 5px;
}

.start-panel .subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

.setup-section {
  text-align: left;
}

.setup-section h3 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.setup-group {
  margin-bottom: 20px;
}

.setup-group label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.setup-group select {
  width: 100%;
  padding: 10px;
  background: var(--bg-panel);
  border: 1px solid var(--accent-secondary);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.player-type-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  padding: 8px;
  background: var(--bg-panel);
  border-radius: 6px;
}

.player-type-row span {
  font-size: 0.85rem;
  color: var(--text-primary);
}

.player-type-row select {
  width: 120px;
  padding: 6px;
  background: var(--bg-primary);
  border: 1px solid var(--accent-secondary);
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 0.85rem;
}

.btn-large {
  width: 100%;
  padding: 15px;
  font-size: 1rem;
  margin-top: 10px;
}

.game-screen {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.game-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Header */
.game-header {
  background: var(--bg-secondary);
  padding: 10px 20px;
  text-align: center;
  border-bottom: 2px solid var(--accent-primary);
}

.game-header h1 {
  font-size: 1.8rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 4px;
}

.subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Game Area */
.game-area {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Side Panels */
.side-panel {
  width: 220px;
  background: var(--bg-secondary);
  padding: 15px;
  display: flex;
  flex-direction: column;
  gap: 15px;
  overflow-y: auto;
}

.left-panel {
  border-right: 1px solid var(--bg-panel);
}

.right-panel {
  border-left: 1px solid var(--bg-panel);
}

/* Player Cards */
.player-card {
  background: var(--bg-panel);
  border-radius: 8px;
  padding: 12px;
  border-left: 4px solid transparent;
  transition: all 0.3s ease;
  margin-bottom: 10px;
}

.player-card.active {
  box-shadow: 0 0 15px rgba(233, 69, 96, 0.4);
}

.player-1 {
  border-left-color: #4ecca3;
}

.player-1.active {
  background: linear-gradient(135deg, var(--bg-panel), rgba(78, 204, 163, 0.1));
}

.player-2 {
  border-left-color: #e94560;
}

.player-2.active {
  background: linear-gradient(135deg, var(--bg-panel), rgba(233, 69, 96, 0.1));
}

.player-3 {
  border-left-color: #f9ed69;
}

.player-3.active {
  background: linear-gradient(135deg, var(--bg-panel), rgba(249, 237, 105, 0.1));
}

.player-4 {
  border-left-color: #00adb5;
}

.player-4.active {
  background: linear-gradient(135deg, var(--bg-panel), rgba(0, 173, 181, 0.1));
}

.player-card.ai-controlled {
  opacity: 0.8;
}

.player-card.ai-controlled::after {
  content: 'AI';
  position: absolute;
  top: 5px;
  right: 8px;
  font-size: 0.7rem;
  background: var(--accent-secondary);
  padding: 2px 6px;
  border-radius: 4px;
}

.player-card h3 {
  font-size: 1rem;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.player-stats {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

.stat-label {
  color: var(--text-secondary);
}

.stat-value {
  font-weight: bold;
  color: var(--text-primary);
}

/* Game Info */
.game-info {
  background: var(--bg-panel);
  border-radius: 8px;
  padding: 12px;
}

.game-info h3 {
  font-size: 0.9rem;
  margin-bottom: 10px;
  color: var(--text-secondary);
}

.info-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  padding: 4px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.info-item:last-child {
  border-bottom: none;
}

/* Buttons */
.btn {
  padding: 10px 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all 0.2s ease;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent-primary);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: #ff6b6b;
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-panel);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--accent-secondary);
}

.btn-action {
  background: var(--accent-secondary);
  color: white;
  flex: 1;
}

.btn-action:hover:not(:disabled) {
  background: #00cec9;
}

/* Actions Panel */
.actions-panel {
  background: var(--bg-panel);
  border-radius: 8px;
  padding: 12px;
}

.actions-panel h3 {
  font-size: 0.9rem;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.instruction {
  font-size: 0.8rem;
  color: var(--text-primary);
  margin-bottom: 12px;
  min-height: 40px;
}

/* Selected Cell Info */
.selected-cell-info {
  background: var(--bg-panel);
  border-radius: 8px;
  padding: 12px;
  margin-top: 10px;
}

.selected-cell-info h3 {
  font-size: 0.9rem;
  margin-bottom: 10px;
  color: var(--text-secondary);
}

.cell-stats {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cell-stats .stat {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

.action-buttons {
  display: flex;
  gap: 8px;
}

/* Battle Log */
.battle-log {
  background: var(--bg-panel);
  border-radius: 8px;
  padding: 12px;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 200px;
}

.battle-log h3 {
  font-size: 0.9rem;
  margin-bottom: 10px;
  color: var(--text-secondary);
}

.log-entries {
  flex: 1;
  overflow-y: auto;
  font-size: 0.75rem;
  font-family: 'Consolas', monospace;
}

.log-entry {
  padding: 4px 6px;
  margin-bottom: 4px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 4px;
  border-left: 3px solid var(--accent-secondary);
}

.log-entry.attack {
  border-left-color: var(--accent-primary);
}

.log-entry.victory {
  border-left-color: var(--player1-color);
}

.log-entry.defeat {
  border-left-color: var(--player2-color);
}

/* Canvas Container */
.canvas-container {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
  min-width: 600px;
  min-height: 600px;
}

#game-canvas {
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  display: block;
}

.canvas-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(26, 26, 46, 0.95);
  padding: 30px 50px;
  border-radius: 12px;
  border: 2px solid var(--accent-primary);
  display: none;
  z-index: 10;
}

.canvas-overlay.visible {
  display: block;
}

#overlay-message {
  font-size: 1.5rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 3px;
}

/* Footer */
.game-footer {
  background: var(--bg-secondary);
  padding: 8px 20px;
  text-align: center;
  border-top: 1px solid var(--bg-panel);
}

.game-footer p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-panel);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-secondary);
}

/* Responsive */
@media (max-width: 1200px) {
  .side-panel {
    width: 180px;
  }
}

@media (max-width: 900px) {
  .game-area {
    flex-direction: column;
  }
  
  .side-panel {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
  }
  
  .canvas-container {
    min-height: 400px;
  }
}