.container max-width: 1200px; margin: 0 auto; padding: 20px; h1, h2, h3, h4 color: #1a73e8; img width: 50%; display: block; margin: 20px auto; border-radius: 10px; video display: block; margin: 20px auto; max-width: 100%; border-radius: 10px; button background-color: #1a73e8; color: white; padding: 15px 25px; border: none; border-radius: 5px;