:root {
  --light: #ecdab9;
  --dark: #ae8a68;
  --select: rgba(40, 120, 220, 0.55);
  --target: rgba(40, 180, 90, 0.55);
  --last: rgba(240, 200, 60, 0.45);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: #22211f;
  color: #eee;
  display: flex;
  justify-content: center;
}

main { padding: 1.5rem; max-width: 980px; }

header h1 { margin: 0 0 0.2rem; }
header p { margin: 0 0 1rem; color: #aaa; }

.layout { display: flex; gap: 1.5rem; flex-wrap: wrap; }

#board {
  display: grid;
  grid-template-columns: repeat(8, minmax(40px, 72px));
  grid-template-rows: repeat(8, minmax(40px, 72px));
  border: 4px solid #111;
  user-select: none;
}

.square {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

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

.square img { width: 88%; height: 88%; pointer-events: none; }

.square.selected::after,
.square.target::after,
.square.last::after {
  content: "";
  position: absolute;
  inset: 0;
}
.square.selected::after { background: var(--select); }
.square.target::after { background: var(--target); border-radius: 50%; margin: 32%; }
.square.target.occupied::after { border-radius: 0; margin: 0; opacity: 0.6; }
.square.last::after { background: var(--last); }

aside {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  min-width: 240px;
  flex: 1;
}

#status { font-size: 1.1rem; min-height: 1.4em; }

.controls { display: flex; gap: 0.6rem; flex-wrap: wrap; align-items: center; }
.controls label { color: #bbb; font-size: 0.9rem; }
.controls select { margin-left: 0.3rem; }

button {
  background: #444;
  color: #eee;
  border: 1px solid #666;
  border-radius: 6px;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
}
button:hover { background: #555; }

#moves {
  background: #1a1918;
  border-radius: 6px;
  padding: 0.7rem;
  min-height: 8rem;
  max-height: 18rem;
  overflow-y: auto;
  margin: 0;
  font-size: 0.9rem;
}

#fen { color: #888; font-size: 0.75rem; word-break: break-all; }