* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #2b2b2b;
  color: #eee;
  display: flex;
  justify-content: center;
  padding: 24px 12px;
  user-select: none;
}
.wrap { text-align: center; }
h1 { font-size: 26px; margin-bottom: 12px; }
.badge {
  font-size: 13px;
  background: #c0392b;
  padding: 3px 10px;
  border-radius: 12px;
  vertical-align: middle;
}
.info { margin-bottom: 10px; height: 22px; }
#status { font-size: 16px; }
#thinking { margin-left: 14px; color: #f1c40f; animation: blink 1s infinite; }
.hidden { visibility: hidden; }
@keyframes blink { 50% { opacity: .3; } }
.board-wrap {
  display: inline-block;
  background: #e3b96f;
  padding: 0;
  border-radius: 6px;
  box-shadow: 0 6px 24px rgba(0,0,0,.5);
}
canvas { display: block; cursor: pointer; border-radius: 6px; }
.controls { margin-top: 14px; }
button {
  background: #444;
  color: #eee;
  border: 1px solid #666;
  border-radius: 6px;
  padding: 8px 16px;
  margin: 0 5px;
  font-size: 14px;
  cursor: pointer;
  transition: background .15s;
}
button:hover { background: #555; }