:root {
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: #f2efe7;
  color: #2f2a24;
}

.app {
  padding: 20px;
  border-radius: 14px;
  background: #fffaf2;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
  text-align: center;
  width: min(96vw, 700px);
  box-sizing: border-box;
}

h1 {
  margin: 0 0 8px;
}

.status {
  margin: 0 0 10px;
  font-size: 1rem;
  font-weight: 600;
}

.controls {
  margin-bottom: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

select,
button {
  border: none;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.95rem;
}

select {
  border: 1px solid #b6976d;
  background: #fff;
  color: #2f2a24;
}

button {
  background: #6b4e2f;
  color: #fff;
  cursor: pointer;
}

button:hover {
  background: #7d5b35;
}

canvas {
  border: 2px solid #7b5a2e;
  border-radius: 6px;
  background: #deb977;
  max-width: min(90vw, 600px);
  height: auto;
}

.hint {
  margin-top: 10px;
  color: #5a534a;
}