.addon-box {
  background: #f8f9fb;
  padding: 20px;
  margin-top: 20px;
  margin-bottom: 50px;
  border-radius: 12px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.addon-box h3 {
  font-size: 18px;
  margin-bottom: 15px;
  font-weight: 600;
  color: #1d1d1f;
}

.addon-option {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
  font-size: 16px;
  padding: 12px 15px;
  border: 2px solid #0051ff;
  border-radius: 8px;
  background: white;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
}

.addon-option:hover {
  background: #f0f5ff;
}

.addon-option:active {
  background: #e0ebff;
}

.addon-option input[type="checkbox"] {
  margin-right: 10px;
  transform: scale(1.3);
}

.button.alt {
  background: #0051ff;
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease-in-out;
}

.button.alt:hover {
  background: #003fcc;
}