* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 16px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px; 
}

#controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

#buttons-container {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  min-height: 60vh;
}

.game-button {
  width: 10em;
  height: 5em;

  border: 2px solid #555;
  font-size: 20px;
  font-weight: 700;
  color: black;

  display: flex;
  align-items: center;
  justify-content: center;

  padding: 0;
  cursor: pointer;
}

.game-button:disabled {
  cursor: not-allowed;
  opacity: 0.9;
}

#message {
  margin-top: 12px;
  font-weight: 700;
}

.game-button.row-mode {
  position: relative;
  left: 0;
  top: 0;
}

.game-button.window-mode {
  position: fixed;
}