* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  background: #efe9dd;
  color: #333;
}

.app {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  padding: 24px;
  max-width: 1000px;
  margin: 0 auto;
  align-items: flex-start;
}

.board-area {
  flex: 1 1 520px;
}

canvas {
  width: 100%;
  max-width: 640px;
  aspect-ratio: 1 / 1;
  display: block;
  border-radius: 8px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
  cursor: pointer;
  background: #d8a860;
}

.panel {
  flex: 0 0 220px;
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

h1 {
  font-size: 22px;
  margin: 0;
}

.status {
  font-size: 15px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #f3ede2;
  min-height: 42px;
  display: flex;
  align-items: center;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: #666;
}

select {
  font: inherit;
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: #fff;
  color: #333;
}

button {
  font: inherit;
  padding: 10px;
  border: none;
  border-radius: 8px;
  background: #8c5a2b;
  color: #fff;
  cursor: pointer;
}

button:hover {
  background: #a06a34;
}

.hint {
  font-size: 12px;
  color: #999;
  margin: 0;
  line-height: 1.6;
}