.ah-grayscale {
    filter: grayscale(100%);
}
.ah-contrast {
    filter: contrast(200%);
}
.ah-underline a {
    text-decoration: underline !important;
}
.ah-dyslexia {
    font-family: 'OpenDyslexic', Arial, sans-serif;
}
.ah-hidden { display: none !important; }