:root {
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(circle at top, #eaf7ff, #d4ebf8 50%, #c1e0f0);
  color: #183042;
}

.wrapper {
  width: min(1024px, 95vw);
  text-align: center;
  padding-bottom: 1.5rem;
}

h1 {
  margin: 0.4rem 0 0.2rem;
}

.subtitle {
  margin-top: 0;
  opacity: 0.85;
}

canvas {
  width: 100%;
  max-width: 960px;
  border-radius: 14px;
  border: 2px solid #2f4858;
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.18);
  background: #fff;
  touch-action: none;
}

.controls {
  margin: 0.8rem auto 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  font-size: 0.95rem;
}

kbd {
  font: inherit;
  padding: 0.1rem 0.35rem;
  border: 1px solid #7e9db1;
  border-bottom-width: 2px;
  border-radius: 4px;
  background: #fff;
}

.touch-controls {
  margin-top: 0.75rem;
  display: flex;
  justify-content: center;
  gap: 0.6rem;
}

button,
.touch-controls button {
  border: none;
  background: #1f5f80;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 10px;
  padding: 0.55rem 0.95rem;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.16);
}

button:active {
  transform: translateY(1px);
}

.leaderboard {
  max-width: 540px;
  margin: 1rem auto 0;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid #8cb6cd;
  border-radius: 12px;
  padding: 0.8rem 1rem;
  text-align: left;
}

.leaderboard h2 {
  margin: 0.2rem 0 0.6rem;
  text-align: center;
}

.score-form {
  display: flex;
  gap: 0.5rem;
}

.score-form input {
  flex: 1;
  border: 1px solid #7e9db1;
  border-radius: 8px;
  padding: 0.5rem 0.65rem;
  font-size: 1rem;
}

#leaderboard-list {
  margin: 0.6rem 0 0;
  padding-left: 1.4rem;
}

#leaderboard-list li {
  padding: 0.2rem 0;
}

.score-message {
  min-height: 1.1rem;
  margin: 0.5rem 0 0;
  color: #0e4460;
  font-size: 0.92rem;
}

@media (min-width: 900px) {
  .touch-controls {
    display: none;
  }
}