body {
    font-size: 19px;
    position: relative;
    line-height: 1.6;
    font-family: 'Avenir', -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Helvetica Neue", Arial, sans-serif;
    text-transform: none;
    color: #222;
    hyphens: auto;
    margin: 0;
}

@media screen and (max-width: 480px) {
    body {
        font-size: 15px;
    }
}

@media (max-width: 1280px) {
    body {
        font-size: 18px;
    }
}

.tab-content img {
    display: block;
    margin-left: auto;
    margin-right: auto;
    max-width: 100%;
    /* max-height: 100%; */
}

.highlight {
    background-color: yellow;
}

pre {
    background: aliceblue;
}

mark {
    background: orange;
    color: black;
}

.visited {
    color: rgb(204, 190, 192);
    background-color: transparent;
    text-decoration: none;
}

iframe {
    max-width: 90%;
    display: flex;
    align-items: center;
    justify-content: center;
}

video {
    max-width: 90%;
}

.pageContent {
    margin-top: 20px;
    border: 1px outset green;
    text-align: left;
    word-wrap: break-word;
    padding: 8px;
}

body {
    margin-bottom: 100px;
}

footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 100px;
}


/* The switch - the box around the slider */

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}


/* Hide default HTML checkbox */

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}


/* The slider */

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    -webkit-transition: .4s;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    -webkit-transition: .4s;
    transition: .4s;
}

input:checked+.slider {
    background-color: #2196F3;
}

input:focus+.slider {
    box-shadow: 0 0 1px #2196F3;
}

input:checked+.slider:before {
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    transform: translateX(26px);
}


/* Rounded sliders */

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}