:root {
  --bg-color: #78350F;
  --surface-color: #92400E;
  --primary-color: #F59E0B;
  --secondary-color: #FBBF24;
  --accent-color: #FDE68A;
  --text-color: #FFFFFF;
  --border-radius: 8px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.container {
  width: 100%;
  max-width: 1200px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

header {
  text-align: center;
  margin-bottom: 20px;
}

h1 {
  font-size: 2.5rem;
  color: var(--primary-color);
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

#status-display {
  font-size: 1.2rem;
  margin-top: 10px;
  font-weight: bold;
  color: var(--secondary-color);
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 30px;
}

@media (min-width: 768px) {
  main {
    flex-direction: row;
    justify-content: center;
    align-items: flex-start;
  }
}

.game-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 600px;
}

.captured-pieces {
  height: 30px;
  width: 100%;
  display: flex;
  gap: 5px;
  align-items: center;
  justify-content: flex-start;
  min-height: 30px;
}

.game-board-container {
  background-color: var(--surface-color);
  padding: 10px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  aspect-ratio: 1 / 1;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 4px;
}

aside.controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
  max-width: 400px;
  background-color: var(--surface-color);
  padding: 20px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

label {
  font-weight: bold;
  color: var(--accent-color);
}

select {
  padding: 10px;
  border-radius: var(--border-radius);
  border: none;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-color);
  font-size: 1rem;
}

select:focus {
  outline: 2px solid var(--primary-color);
}

.btn {
  padding: 12px 20px;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: transform 0.1s, opacity 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn:active {
  transform: scale(0.98);
}

.btn:hover {
  opacity: 0.9;
}

.btn.primary {
  background-color: var(--primary-color);
  color: #000;
}

.btn.secondary {
  background-color: var(--secondary-color);
  color: #000;
}

.btn.accent {
  background-color: var(--accent-color);
  color: #000;
}

.pgn-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pgn-container h3 {
  color: var(--accent-color);
  font-size: 1.1rem;
}

textarea {
  width: 100%;
  height: 150px;
  padding: 10px;
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background-color: rgba(0, 0, 0, 0.2);
  color: var(--text-color);
  font-family: monospace;
  font-size: 0.9rem;
  resize: vertical;
}

textarea:focus {
  outline: 1px solid var(--primary-color);
}

footer {
  text-align: center;
  font-size: 0.8rem;
  opacity: 0.7;
  margin-top: 20px;
}