.center {text-align: center} .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; } .strong {font-weight: bold;} .italic {font-style: italic;} .serif {font-family: serif;} .sans {font-family: sans-serif;} .big {font-size: 1.5em;} .small {font-size: .75em;} .offset { margin: 1em; padding: 1.5em; border: black 1px solid; } img { padding: 0; margin: 0; max-width: 100%; max-height: 100%; column-count: 1; break-inside: avoid; oeb-column-number: 1; }