SingleFile/extension/ui/pages/help.css

body {
    background-color: #eee;
}

body>div {
    position: relative;
    background-color: #fff;
    font-family: sans-serif;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    border-width: 1px;
    border-style: solid;
    border-radius: 8px;
    padding-left: 10px;
    padding-right: 10px;
    padding-bottom: 20px;
    text-align: justify;
    box-shadow: #888 2px 2px 2px;
}

div>iframe {
    margin-top: 30px;
    margin-left: auto;
    margin-right: auto;
    display: block;
    margin-left: auto;
}

.option {
    font-size: 1.1em;
    font-style: normal;
    font-family: sans-serif;
    color: graytext;
}

.notice {
    font-style: italic;
    font-family: serif;
    font-size: 1.1em;
}

ol {
    -webkit-padding-start: 30px;
    margin: 0px;
    padding-right: 10px;
}

ol>li {
    padding-top: 2em;
}

a[id] {
    font-weight: bold;
}

ol>li>ul>li {
    padding-top: .5em;
}

.icon {
    height: 1em;
}

#titleIcon {
    width: 1.2em;
    height: 1.2em;
}

#title {
    padding-left: .3em;
    vertical-align: top;
}

#titleBorder {
    margin-top: 10px;
    padding-left: 10px;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

#index {
    padding-left: 10px;
    font-size: .9em;
}

h2,
h4 {
    padding-left: .3em;
    margin-bottom: 0px;
}

li {
    line-height: 1.5em;
}

#logo-html5 {
    position: absolute;
    right: 0px;
    bottom: 20px;
}

.availability {
    font-size: 11pt;
}

code {
    font-size: 1.1em;
}

kbd,
.key {
    display: inline;
    display: inline-block;
    min-width: 1em;
    padding: .2em .3em;
    font: normal .85em/1 "Lucida Grande", Lucida, Arial, sans-serif;
    text-align: center;
    text-decoration: none;
    -moz-border-radius: .3em;
    -webkit-border-radius: .3em;
    border-radius: .3em;
    border: none;
    cursor: default;
    -moz-user-select: none;
    -webkit-user-select: none;
    user-select: none;
}

kbd[title],
.key[title] {
    cursor: help;
}

kbd,
kbd.dark,
.dark-keys kbd,
.key,
.key.dark,
.dark-keys .key {
    background: rgb(80, 80, 80);
    background: -moz-linear-gradient(top, rgb(60, 60, 60), rgb(80, 80, 80));
    background: -webkit-gradient(linear, left top, left bottom, from(rgb(60, 60, 60)), to(rgb(80, 80, 80)));
    color: rgb(250, 250, 250);
    text-shadow: -1px -1px 0 rgb(70, 70, 70);
    -moz-box-shadow: inset 0 0 1px rgb(150, 150, 150), inset 0 -.05em .4em rgb(80, 80, 80), 0 .1em 0 rgb(30, 30, 30), 0 .1em .1em rgba(0, 0, 0, .3);
    -webkit-box-shadow: inset 0 0 1px rgb(150, 150, 150), inset 0 -.05em .4em rgb(80, 80, 80), 0 .1em 0 rgb(30, 30, 30), 0 .1em .1em rgba(0, 0, 0, .3);
    box-shadow: inset 0 0 1px rgb(150, 150, 150), inset 0 -.05em .4em rgb(80, 80, 80), 0 .1em 0 rgb(30, 30, 30), 0 .1em .1em rgba(0, 0, 0, .3);
}

kbd.light,
.light-keys kbd,
.key.light,
.light-keys .key {
    background: rgb(250, 250, 250);
    background: -moz-linear-gradient(top, rgb(210, 210, 210), rgb(255, 255, 255));
    background: -webkit-gradient(linear, left top, left bottom, from(rgb(210, 210, 210)), to(rgb(255, 255, 255)));
    color: rgb(50, 50, 50);
    text-shadow: 0 0 2px rgb(255, 255, 255);
    -moz-box-shadow: inset 0 0 1px rgb(255, 255, 255), inset 0 0 .4em rgb(200, 200, 200), 0 .1em 0 rgb(130, 130, 130), 0 .11em 0 rgba(0, 0, 0, .4), 0 .1em .11em rgba(0, 0, 0, .9);
    -webkit-box-shadow: inset 0 0 1px rgb(255, 255, 255), inset 0 0 .4em rgb(200, 200, 200), 0 .1em 0 rgb(130, 130, 130), 0 .11em 0 rgba(0, 0, 0, .4), 0 .1em .11em rgba(0, 0, 0, .9);
    box-shadow: inset 0 0 1px rgb(255, 255, 255), inset 0 0 .4em rgb(200, 200, 200), 0 .1em 0 rgb(130, 130, 130), 0 .11em 0 rgba(0, 0, 0, .4), 0 .1em .11em rgba(0, 0, 0, .9);
}

@media (max-width:800px) {
    body {
        background-color: white;
        margin: 0px;
    }
    body>div {
        border-width: 0px;
    }
    ol {
        padding-left: 20px;
    }
    ul {
        padding-left: 10px;
    }
}