/* Preserve Charly's 1280 x 720 composition at every presentation size. */
html, body { width: 100%; height: 100%; overflow: hidden; }
body { background: #f5f6fa; }
.presentation-screen { position: absolute; width: 1280px; height: 720px; left: 50%; top: 50%; margin-left: -640px; margin-top: -360px; transform: scale(var(--presentation-scale, 1)); transform-origin: center; }
@media print { .presentation-screen { position: static; margin: 0; transform: none; } }