:root {
  --accent: #cc0000;
  --muted: #666;
}

* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial;
  background: #fafafa;
  color: #222;
  padding: 24px;
}

.container {
  max-width: 980px;
  margin: 0 auto;
}
h1 {
  margin: 0 0 8px;
}
.lead {
  color: var(--muted);
  margin-bottom: 12px;
}

.game-area {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
#basecanvas {
  background: #fff;
  border: 2px solid #e6e6e6;
  border-radius: 6px;
  outline: none;
}
#basecanvas:focus {
  box-shadow: 0 0 0 4px rgba(204, 0, 0, 0.08);
}

.info {
  min-width: 120px;
  font-size: 14px;
}
.info > div {
  margin-bottom: 10px;
}
button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
}
.notes {
  margin-top: 16px;
  padding: 12px;
  background: #fff;
  border-radius: 6px;
  border: 1px solid #eee;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.03);
}