/* Resize to fill its container div's width */
.img-maxwidth {
max-width: 100%;
height: auto;
}
/* Dark background for light images with transparent backgrounds */
.img-bgblack {
background-color: black;
}
/* Convert images to greyscale */
.img-grayscale,
.img-greyscale {
filter: grayscale(100%);
}
