:root {
  --bg: #ffffff;
  --ink: #555555;
  --line: #d9d9d9;
  --strong: #444444;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", Arial, sans-serif;
}

.wrap {
  width: min(980px, 94vw);
  margin: 40px auto;
}

.lead {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--strong);
}

.parent-links {
  margin: 0 0 16px;
  font-size: 0.95rem;
}

.parent-links a {
  color: var(--strong);
}

.game-shell {
  border: 1px solid var(--line);
  padding: 8px;
  background: #fff;
}

.scoreboard {
  text-align: right;
  margin: 0 2px 6px;
  font-family: "Courier New", monospace;
  letter-spacing: 0.08em;
  color: #666666;
  font-size: 1rem;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: #fff;
}

.callout {
  margin: 8px 2px 0;
  font-size: 0.83rem;
  color: #7a7a7a;
}

@media (max-width: 700px) {
  .wrap {
    margin: 20px auto;
  }

  .lead {
    font-size: 1rem;
  }

  .scoreboard {
    font-size: 0.92rem;
  }
}