@viewport {
  min-width: 640px;
  max-width: 800px;
}

@viewport {
min-width: 640px;
max-width: 800px;
}

@viewport{
  min-width: 640px;
  max-width: 800px;
}

@viewport  {
  min-width: 640px;
  max-width: 800px;
}

@viewport
{
  min-width: 640px;
  max-width: 800px;
}

@viewport

{
  min-width: 640px;
  max-width: 800px;
}