iframe { border: none; width: 100%; height: 500px; } @media (min-width: 1024px) { .content_viewport { border: 0px none; height: 900px; width: 100%; } } @media (max-width: 1023px) { .content_viewport { border: 0px none; height: 900px; width: 100%; } } @media (min-width: 768px) { .content_viewport { border: 0px none; height: 900px; width: 100%; } }