iBooks's default CSS

user_stylesheet_base.css.tmpl

@namespace epub "http://www.idpf.org/2007/ops";
@namespace svg "http://www.w3.org/2000/svg";

/* Hide soundtrack <audio> tags from ever showing up */
audio[epub|type~="ibooks:soundtrack"] {
  display: none !important;
  /* display: none; doesn't seem to actually work for some reason, so hide it another way */
  height: 0 !important;
}

user_stylesheet_flowable.css.tmpl

{{embed base}}

{{range fonts}}
{{range .}}
@font-face {
  font-family: iBooks_{{.$parent.$key}};
  src: local('{{.}}');
  font-weight: {{.$key}};
}
{{end range .}}
{{end range fonts}}

.calibre > div, .calibre1 > div {
  position: static !important;
}

/* Themes */
{{range themes}}

/* gaiji support */
{{if $parent.respectImageSizeSelector}}
    {{if $parent.respectImageSizeSelectorIsGaiji}}
        {{if css_gaijiImageFilter}}
        :root[__ibooks_internal_theme={{.css_themeIdentifier}}] img{{.$parent.respectImageSizeSelector}} {
            -webkit-filter: {{.css_gaijiImageFilter}};
            {{if ! css_themeShouldInvertContent}}
            background-color: transparent !important;
            {{end css_themeShouldInvertContent}}
        }
        {{end css_gaijiImageFilter}}
    {{end respectImageSizeSelectorIsGaiji}}
{{end respectImageSizeSelector}}


/* content body */
{{if css_themeShouldInvertContent}}
    :root[__ibooks_internal_theme={{.css_themeIdentifier}}] {
    background-color: {{.css_themeContentBackgroundColor}} !important;
    }
    :root[__ibooks_internal_theme={{.css_themeIdentifier}}] * {
    background-color: transparent !important;
    color: {{.css_themeContentTextColor}} !important;
    }
    :root[__ibooks_internal_theme={{.css_themeIdentifier}}] svg|text {
    fill: {{.css_themeContentTextColor}} !important;
    stroke: none !important;
    }
{{else}}
    /* apply body styles to the root too in case the document has no body */
    :root[__ibooks_internal_theme={{.css_themeIdentifier}}],
    :root[__ibooks_internal_theme={{.css_themeIdentifier}}] body {
    background-color: {{.css_themeContentBackgroundColor}};
    color: {{.css_themeContentTextColor}};
    }
{{end css_themeShouldInvertContent}}

/* Links - colors from theme */
:root[__ibooks_internal_theme={{.css_themeIdentifier}}] a {
color: #{{.css_themeLinkColor}};
}
:root[__ibooks_internal_theme={{.css_themeIdentifier}}] a:link,
:root[__ibooks_internal_theme={{.css_themeIdentifier}}] a:visited,
:root[__ibooks_internal_theme={{.css_themeIdentifier}}] a:link *,
:root[__ibooks_internal_theme={{.css_themeIdentifier}}] a:visited * {
color: #{{.css_themeLinkColor}} !important;
}
:root[__ibooks_internal_theme={{.css_themeIdentifier}}] a:active,
:root[__ibooks_internal_theme={{.css_themeIdentifier}}] a:active * {
color: #{{.css_themeLinkColor}} !important;
}
{{end range themes}}
/* End Themes */

html {
  -webkit-touch-callout: none;
  margin: 0 !important;
  padding: 0 !important;
{{if style}}
{{if useColumns}}
  -webkit-column-width: {{.pageWidth}}px;
  -webkit-column-gap: {{.gutter}}px;
  width: {{.width}}px;
  height: {{.pageHeight}}px;
{{else}}
  width: auto !important;
  height: auto !important;
{{end useColumns}}
{{end style}}
  -webkit-line-box-contain: block glyphs replaced;
}

body {
  padding: 0 0 !important;
  overflow: hidden;
  text-align: {{.justification}};
  
  -webkit-locale: '{{.language}}';
  -webkit-hyphens: {{.hyphens}};
  -webkit-hyphenate-character: '-';
  -webkit-hyphenate-limit-before: 3;
  -webkit-hyphenate-limit-after: 3;
  -webkit-hyphenate-limit-lines: 2;
  text-rendering: {{.textRendering}};

{{if isJapanese}}
  /* <rdar://problem/12986020> Turn on break-word by default for Japanese */
  word-wrap: break-word;
  -webkit-line-box-contain: block inline replaced;
  line-break: strict;
  -webkit-line-break: strict;
{{end isJapanese}}

{{if isChinese}}
    font-family: {{.defaultChineseFont}};
{{end isChinese}}
}

/* margins */
{{if isScrollMode}}
{{if scrollModeIsHorizontal}}
/* unpaginated and paginated horizontal scroll */
body {
  /* left and right margins of chapters, also gaps for paginated content */
  margin: 0 40px !important;
}
:root[__ibooks_writing_mode^="vertical-"] body {
  /* unpaginated vertical text needs to be constrained */
  height: {{.pageHeight}}px !important;
}

{{else}}
/* unpaginated vertical scroll */
:root[__ibooks_writing_mode^="horizontal-"] body {
  {{if isPhone}}
  margin: 100px 0 50px 0 !important; /* iPhone */
  {{else }}
  {{if isMac}}
  margin: 0 0 0 0 !important; /* OS X */
  {{else}}
  margin: 220px 0 100px 0 !important; /* iPad */
  {{end isMac}}
  {{end isPhone}}
}
/* paginated vertical scroll; top/bottom margin is per-page */
:root[__ibooks_writing_mode^="vertical-"] body {
  margin: 60px 0 !important;
}
{{end scrollModeIsHorizontal}}
{{else}}
/* book mode */
body {
  -webkit-margin-start: 0px !important;
  -webkit-margin-end: 0px !important;
  -webkit-margin-before: 0 !important;
  -webkit-margin-after: 0 !important;
}
{{end isScrollMode}}

parsererror { white-space: normal !important; }

a { text-decoration: none; }
pre { white-space: pre-wrap; }
@page { margin: 0 0 !important; }
table,ol,il { text-align: -webkit-auto; }
h1,h2,h3,h4,h5,h6 {
{{if isJapanese}}
  /* <rdar://problem/13070417> don't set text-align */
{{else}}
  text-align: -webkit-auto;
{{end isJapanese}}
  text-rendering: optimizelegibility;
}

/* Begin Ted */
img {
  max-height: 95% !important;
  max-width: 100% !important;
  box-sizing: border-box;
  object-fit: contain;
  page-break-inside: avoid;
}

svg {
  max-height: 95% !important;
  max-width: 100% !important;
  box-sizing: border-box;
  object-fit: contain;
  page-break-inside: avoid;
}

audio {
  max-height: 95% !important;
  max-width: 100% !important;
  box-sizing: border-box;
  object-fit: contain;
  page-break-inside: avoid;
}

video {
  max-height: 95% !important;
  max-width: 100% !important;
  box-sizing: border-box;
  object-fit: contain;
  page-break-inside: avoid;
}
/* End Ted */

/* Divs are also used to size images so make sure the authors get what they intended */
/* which is for the images boxed in them to be completely visible on screen */
div {
    max-width: 100%;
}

aside[epub|type~="footnote"] {
  display: none !important;
}

{{if style}}
td {
  max-width: {{.tdClamp}}px !important;
}

{{if fontFamily}}
body {
  line-height: {{.lineHeight}};
  font-family: 'iBooks_{{.fontFamily}}'{{range fontFallbacks}}, '{{.}}'{{end}} !important;
}
math {
  font-family: STIXGeneral, Symbol, 'iBooks_{{.fontFamily}}'{{range fontFallbacks}}, '{{.}}'{{end}} !important;
}
{{end fontFamily}}
{{end style}}

ruby > rt, ruby > rp {
    -webkit-user-select: none;
}

/* centering hack to support Calibre-generated vertical centered documents */
:root:not([__ibooks_has_multiple_pages]) *[__ibooks_centering_hack^="horizontal-"] {
  min-width: {{.pageWidth}}px;
}
:root:not([__ibooks_has_multiple_pages]) *[__ibooks_centering_hack^="vertical-"] {
  min-height: {{.pageHeight}}px;
}

/* fix documents that abuse inline-block */
:root[__ibooks_has_multiple_pages] *[__ibooks_has_inline_block] {
  display: block !important;
}

/* fix writing mode */
:root[__ibooks_has_multiple_pages] span[__ibooks_has_inline_block] {
  -webkit-writing-mode: inherit !important;
}

/* allow breaking of words on headers and anchors as they tend to be larger font size or contain longer words */
a, h1, h2, h3, h4, h5, h6 {
  word-break: break-word !important;
}

/* forced font overrides */
{{if fontFamily}}
p[__ibooks_font_override], span[__ibooks_font_override], div[__ibooks_font_override] 
{ 
  font-family: 'iBooks_{{.fontFamily}}'{{range fontFallbacks}}, '{{.}}'{{end}} !important;
}
/* forced justification */
p[__ibooks_align_override], span[__ibooks_align_override], div[__ibooks_align_override] 
{ 
  text-align: {{.justification}} !important;
}
{{end fontFamily}}

* { -webkit-font-smoothing: subpixel-antialiased }

user_stylesheet_picturebook.css.tmpl

{{embed base}}

html {
  -webkit-touch-callout: none;
  position: relative;
}

.-epub-media-overlay-active{
    color: rgb(40, 84, 153);
}

.hoverHand{
    cursor: pointer;
}

body {
    overflow:hidden;
}