body { font-family: system-ui, Arial, sans-serif; margin: 1rem; background:#111; color:#eee; }
#app { max-width: 1000px; margin: 0 auto; }
.controls { margin-bottom: 1rem; display:flex; gap:0.5rem; flex-wrap:wrap; }
button { background:#2d6ae0; color:#fff; border:none; padding:0.6rem 1rem; border-radius:4px; cursor:pointer; }
button:hover { background:#2158b9; }
input { padding:0.6rem; background:#222; color:#eee; border:1px solid #444; border-radius:4px; }
#boardContainer { margin: 1rem 0; }
#info { font-size:0.9rem; line-height:1.4; }
#status { font-weight:600; }
#message { color:#ff6b6b; font-weight:600; }