:root {
  color-scheme: light;
}

* {
  box-sizing: border-box;
  font-family: "SF Pro Text", "Noto Sans TC", system-ui, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #a5d8ff, #d0ebff 60%, #ffe8cc);
  color: #1f2937;
}

.game-wrap {
  text-align: center;
  padding: 16px;
}

h1 {
  margin: 0 0 10px;
  font-size: 1.8rem;
}

canvas {
  border: 3px solid #1f2937;
  border-radius: 10px;
  background: #87ceeb;
  width: min(90vw, 420px);
  height: auto;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.hud {
  margin-top: 10px;
  font-size: 0.95rem;
}

button {
  margin-top: 8px;
  border: 0;
  background: #1f2937;
  color: #fff;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  background: #111827;
}