HackMD/public/css/slide.css

.reveal,
.reveal h1,
.reveal h2,
.reveal h3,
.reveal h4,
.reveal h5,
.reveal h6 {
    font-family: "Helvetica Neue", Helvetica, Arial, "Microsoft JhengHei", Meiryo, "ＭＳ ゴシック", "MS Gothic", sans-serif;
    text-transform: none;
}

.reveal pre,
.reveal code {
    font-family: "Source Code Pro", Consolas, monaco, "Microsoft JhengHei", Meiryo, "ＭＳ ゴシック", "MS Gothic", monospace;
    letter-spacing: 0.025em;
    line-height: 1.25;
    -webkit-overflow-scrolling: touch;
}

.vimeo,
.youtube {
    position: relative !important;
    cursor: pointer;
    display: table;
    width: 100% !important;
    text-align: center;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: contain;
    background-color: black;
    overflow: hidden;
    font-size: 24px !important;
}


/* youtube always use 16:9 aspect ratio video */

.vimeo,
.youtube {
    position: relative;
    width: 100%;
    padding-bottom: 56.25% !important;
}

.vimeo > img,
.youtube > img {
    max-width: 100%;
    max-height: 100%;
    margin: 0 !important;
    border: 0 !important;
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
}

.vimeo > iframe,
.youtube > iframe {
    max-width: 100%;
    max-height: 100%;
}

.slideshare .inner,
.speakerdeck .inner {
    padding-bottom: 62% !important;
}

.pdfobject {
    height: 85vh !important;
}

.task-list-item-checkbox {
    font-size: inherit;
    height: 1em;
    margin: 0.2em 0 0.2em -0.65em !important;
}

pre code .wrapper {
    display: -webkit-inline-flex;
    display: -moz-inline-flex;
    display: -ms-inline-flex;
    display: -o-inline-flex;
    display: inline-flex;
}

pre code .gutter {
    float: left;
    overflow: hidden;
    -webkit-user-select: none;
    user-select: none;
}

pre code .gutter.linenumber {
    text-align: right;
    position: relative;
    display: inline-block;
    cursor: default;
    z-index: 4;
    padding: 0 8px 0 0;
    min-width: 20px;
    box-sizing: content-box;
    color: #afafaf !important;
    border-right: 3px solid #6ce26c !important;
}

pre code .gutter.linenumber > span:before {
    content: attr(data-linenumber);
}

pre code .code {
    float: left;
    margin: 0 0 0 16px;
}

.gist .line-numbers {
    border-left: none;
    border-top: none;
    border-bottom: none;
}

.gist .line-data {
    border: none;
}

.gist table {
    border-spacing: 0;
    border-collapse: inherit !important;
}

code[data-gist-id] {
    background: none;
    padding: 0;
}

code[data-gist-id]:before {
    content: ''
}

code[data-gist-id]:after {
    content: ''
}

.alert {
    border-radius: 4px;
}

.alert h4 {
    margin-top: 0;
    color: inherit;
}

.alert > p {
    padding: 5px !important;
}

.alert-success {
    color: #3c763d;
    background-color: #dff0d8;
    border-color: #d6e9c6;
}

.alert-success hr {
    border-top-color: #c9e2b3;
}

.alert-success .alert-link {
    color: #2b542c;
}

.alert-info {
    color: #31708f;
    background-color: #d9edf7;
    border-color: #bce8f1;
}

.alert-info hr {
    border-top-color: #a6e1ec;
}

.alert-info .alert-link {
    color: #245269;
}

.alert-warning {
    color: #8a6d3b;
    background-color: #fcf8e3;
    border-color: #faebcc;
}

.alert-warning hr {
    border-top-color: #f7e1b5;
}

.alert-warning .alert-link {
    color: #66512c;
}

.alert-danger {
    color: #a94442;
    background-color: #f2dede;
    border-color: #ebccd1;
}

.alert-danger hr {
    border-top-color: #e4b9c0;
}

.alert-danger .alert-link {
    color: #843534;
}

pre.flow-chart,
pre.sequence-diagram,
pre.graphviz,
pre.mermaid {
    text-align: center;
    background-color: white;
    border-radius: 0;
    white-space: inherit;
}

pre.flow-chart > code,
pre.sequence-diagram > code,
pre.graphviz > code,
pre.mermaid > code {
    text-align: left;
}

pre.flow-chart > svg,
pre.sequence-diagram > svg,
pre.graphviz > svg,
pre.mermaid > svg {
    max-width: 100%;
    height: 100%;
}

.emoji {
    margin: 0 !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    margin-bottom: -.25em !important;
}

.reveal .slides, .reveal .backgrounds, .reveal.overview {
    transform-style: preserve-3d;
}

.reveal .slides > section,
.reveal .slides > section > section {
    transform-style: flat;
}