* {
  margin: 0;
  padding: 0;
}

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #bfe8ff;
}

#game {
  display: block;
  width: 100vw;
  height: 100vh;
}

#settings-btn {
  position: fixed;
  top: 14px;
  right: 14px;
  width: 56px;
  height: 56px;
  font-size: 30px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  cursor: pointer;
}

#settings-btn:hover {
  background: #fff;
}

#settings-panel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(360px, 85vw);
  padding: 24px 28px;
  background: #fffef5;
  border-radius: 24px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
  font-family: 'Comic Sans MS', 'Chalkboard SE', sans-serif;
  color: #444;
}

#settings-panel.hidden {
  display: none;
}

#settings-panel h2 {
  margin-bottom: 16px;
  text-align: center;
}

#settings-panel label {
  display: block;
  margin-bottom: 18px;
  font-size: 17px;
}

#settings-panel input[type='range'] {
  display: block;
  width: 100%;
  margin-top: 6px;
  accent-color: #66bb6a;
}

.settings-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.settings-buttons button {
  padding: 10px 26px;
  font-size: 17px;
  font-family: inherit;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  background: #e0e0e0;
}

#settings-close {
  background: #66bb6a;
  color: #fff;
}