:root {
  --page: #f4f4f1;
  --frame: #ffffff;
  --frame-edge: #d7d7d2;
  --track: #f2f2f2;
  --track-edge: #c8c8c3;
  --text: #303030;
  --muted: #7e7e7a;
  --accent: #222222;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: var(--page);
  color: var(--text);
  font-family:
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    system-ui,
    sans-serif;
}

button {
  font: inherit;
}

.page {
  width: min(100%, 1780px);
  margin: 0 auto;
  padding: 72px 24px 64px;
}

.hero {
  text-align: center;
  margin-bottom: 34px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(34px, 4vw, 56px);
  font-weight: 700;
  letter-spacing: 0;
}

.hero p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: clamp(16px, 1.8vw, 24px);
}

.game-card {
  padding: 34px;
  border: 1px solid var(--frame-edge);
  border-radius: 20px;
  background: var(--frame);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.06);
}

.game-frame {
  position: relative;
  width: min(100%, 1620px);
  aspect-ratio: 16 / 8;
  margin: 0 auto;
  border: 4px solid var(--track-edge);
  border-radius: 6px;
  overflow: hidden;
  background: var(--track);
}

#gameCanvas {
  display: block;
  width: 100%;
  height: 100%;
  background: #f8f8f6;
}

.scoreboard {
  position: absolute;
  top: 22px;
  right: 24px;
  z-index: 2;
  text-align: right;
  color: #6f6f6a;
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 600;
  line-height: 1.45;
  pointer-events: none;
}

.scoreboard p {
  margin: 0;
}

.scoreboard strong {
  color: #4a4a46;
  font-weight: 700;
}

.overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  place-items: center;
  background: rgba(248, 248, 246, 0.8);
}

.overlay.is-hidden {
  display: none;
}

.overlay-panel {
  text-align: center;
  padding: 24px 32px;
}

.overlay-panel h2 {
  margin: 0;
  font-size: clamp(28px, 3vw, 42px);
  color: #383835;
}

.overlay-panel p {
  max-width: 520px;
  margin: 14px auto 0;
  color: var(--muted);
  font-size: clamp(15px, 1.5vw, 20px);
  line-height: 1.6;
}

.overlay-panel button {
  margin-top: 20px;
  min-width: 120px;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid #333;
  border-radius: 999px;
  background: #2e2e2c;
  color: #fff;
  cursor: pointer;
}

.overlay-panel button:hover {
  background: #20201f;
}

@media (max-width: 900px) {
  .page {
    padding: 34px 12px 28px;
  }

  .game-card {
    padding: 14px;
    border-radius: 14px;
  }

  .game-frame {
    width: 100%;
  }

  .scoreboard {
    top: 14px;
    right: 14px;
    font-size: 18px;
  }
}