body {
  background: linear-gradient(135deg, #89f7fe, #66a6ff);
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
  font-family: Arial, sans-serif;
  flex-direction: column; /* stack everything vertically */
}

/* Big counter number */
#counter {
  font-size: 6em;
  font-weight: bold;
  color: #333;
  margin-bottom: 30px; /* space between number and buttons */
  text-align: center;
}

/* Buttons container */
.buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-bottom: 20px;
}

/* Buttons style */
button {
  padding: 12px 20px;
  font-size: 1.2em;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.2s;
}

button:hover {
  opacity: 0.85;
  transform: scale(1.05);
}

/* Specific button colors */
#increase { background: #4CAF50; color: white; }
#decrease { background: #f44336; color: white; }
#restart  { background: #555; color: white; }

footer {
  margin-top: 15px;
  color: #555;
  font-size: 0.9em;
}