zulip/static/styles/rendered_markdown.scss

.rendered_markdown {
    /* The default top/bottom margins for paragraphs are small, to make sure
       they look nice next to blockquotes, lists, etc. */
    p {
        margin: 3px 0px 3px 0px;
    }

    /* The spacing between two paragraphs is significantly larger.  We
       arrange things so that this spacing matches the spacing between
       paragraphs in two consecutive 1-line messages. */
    p + p {
        margin-top: 10px;
    }

    /* Ensure bulleted lists are nicely centered in 1-line messages */
    ul {
        margin: 2px 0 5px 20px;
    }

    /* Swap the left and right margins of bullets for Right-To-Left languages */
    &.rtl ul {
        margin-right: 20px;
        margin-left: 0;
    }

    /* Ensure ordered lists are nicely centered in 1-line messages */
    ol {
        margin: 2px 0 5px 20px;
    }

    /* Swap the left and right margins of ordered list for Right-To-Left languages */
    &.rtl ol {
        margin-right: 8px;
        margin-left: 0;
    }

    /* Reduce top-margin when a paragraph is followed by an ordered or bulleted list */
    p + ul,
    p + ol {
        margin-top: -3px;
    }

    /* Headings: We need to make sure our headings are less prominent than our sender names styling. */
    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        font-size: 14px;
        font-weight: 600;
        line-height: 1.4;
        margin-top: 0px;
        margin-bottom: 5px;
        text-decoration: underline;
    }

    /* Formatting for blockquotes */
    blockquote {
        padding-left: 5px;
        margin-left: 10px;
        margin-top: 5px;
        margin-bottom: 6px;
        border-left-color: hsl(0, 0%, 87%);

        p {
            line-height: inherit;
            font-size: inherit;
        }
    }

    &.rtl blockquote {
        padding-left: unset;
        padding-right: 5px;
        margin-left: unset;
        margin-right: 10px;
        border-left: unset;
        border-right: 5px solid hsl(0, 0%, 87%);
    }

    /* Formatting for markdown tables */
    table {
        padding-right: 10px;
        margin: 5px 5px 5px 5px;
        width: 99%;
    }

    thead {
        background-color: hsl(0, 0%, 93%);
    }

    tr {
        display: table-row;
        vertical-align: inherit;
    }

    tr th {
        border: 1px solid hsl(0, 0%, 80%);
        padding: 4px;
        text-align: left;
    }

    tr td {
        border: 1px solid hsl(0, 0%, 80%);
        padding: 4px;
    }

    /* Emoji; sized to be easily understood while not overwhelming text. */
    .emoji {
        height: 20px;
        width: 20px;
    }

    /* Mentions and alert words */
    .user-mention-me :not(.silent) {
        background-color: hsl(112, 88%, 87%);
    }

    .user-group-mention,
    .user-mention {
        background-color: hsl(0, 0%, 93%);
        border-radius: 3px;
        padding: 0 0.2em;
        box-shadow: 0px 0px 0px 1px hsl(0, 0%, 80%);
        margin-right: 2px;
        margin-left: 2px;
        white-space: nowrap;
        background: linear-gradient(to bottom, hsla(0, 0%, 0%, 0.1) 0%, hsla(0, 0%, 0%, 0.0) 100%);
        display: inline-block;
        margin-bottom: 1px;
    }

    .alert-word {
        background-color: hsla(102, 85%, 57%, 0.5);
    }

    .message_body_gravatar {
        width: 20px;
        height: 20px;
        margin: 2px 2px 2px 0px;
        vertical-align: text-bottom;
    }

    /* Highlighting for message edit history */
    .highlight_text_inserted {
        color: hsl(122, 72%, 30%);
        background-color: hsl(120, 64%, 95%);
    }

    .highlight_text_deleted {
        color: hsl(0, 100%, 50%);
        text-decoration: line-through;
        background-color: hsl(7, 90%, 92%);
        word-break: break-all;
    }

    /* LaTeX styling */
    .katex-display {
        margin: 0em 0;
    }

    .tex-error {
        color: hsl(0, 0%, 50%);
    }

    /* CSS for message content widgets */
    table.tictactoe {
        width: 80px;
        margin-left: 0px;
    }

    td.tictactoe {
        width: 15px;
        border: none;
        padding: 2px;
    }

    button.tictactoe-square {
        background-color: hsl(156, 30%, 62%);
        width: 40px;
        height: 40px;
        border: none;
        border-radius: 3px;
        font-size: 25px;
        color: hsl(0, 0%, 100%);
    }

    button.tictactoe-square:hover {
        background-color: hsl(155, 5%, 53%);
    }

    button.tictactoe-square:disabled {
        background-color: hsl(156, 33%, 81%);
    }

    /* embedded link previews */
    .message_inline_image_title {
        font-weight: bold;
    }

    .twitter-image,
    .message_inline_image {
        position: relative;
        margin-bottom: 5px;
        margin-left: 5px;
        height: 100px;
        display: block !important;
        border: none !important;
    }

    &.rtl .twitter-image,
    &.rtl .message_inline_image {
        margin-left: unset;
        margin-right: 5px;
    }

    .twitter-tweet {
        border: 1px solid hsl(0, 0%, 87%);
        padding: .5em .75em;
        margin-bottom: 0.25em;
        word-break: break-word;
        min-height: 48px;
    }

    .twitter-avatar {
        float: left;
        width: 48px;
        height: 48px;
        margin-right: .75em;
    }

    .message_inline_ref {
        margin-bottom: 5px;
        margin-left: 5px;
        height: 50px;
        display: block !important;
        border: none !important;
    }

    &.rtl .message_inline_ref {
        margin-left: unset;
        margin-right: 5px;
    }

    .twitter-image img,
    .message_inline_image img,
    .message_inline_ref img {
        height: auto;
        max-height: 100%;
        float: left;
        margin-right: 10px;
    }

    .message_inline_image img {
        cursor: zoom-in;
    }

    .youtube-video img,
    .vimeo-video img,
    .embed-video img {
        cursor: pointer;
    }

    &.rtl .twitter-image img,
    &.rtl .message_inline_image img,
    &.rtl .message_inline_ref img {
        float: right;
        margin-right: unset;
        margin-left: 10px;
    }

    li .message_inline_image img {
        float: none;
    }

    .youtube-video .fa-play::before,
    .embed-video .fa-play::before {
        position: absolute;
        margin: var(--margin-top, 32px) 0 0 var(--margin-left, 45px);
        padding: 5px 8px 5px 10px;
        font-size: 12px;
        border-radius: 4px;
        background-color: hsl(0, 0%, 0%);
        color: hsl(0, 0%, 100%);
        opacity: 0.7;
        top: 0;
        left: 0;
    }

    .message_embed {
        display: block;
        position: relative;
        margin: 5px 0px;
        border: none;
        border-left: 3px solid hsl(0, 0%, 93%);
        height: 80px;
        padding: 5px;
        z-index: 1;
        text-shadow: hsla(0, 0%, 0%, 0.01) 0 0 1px;

        .message_embed_title {
            padding-top: 0px;
            /* to remove the spacing that the font has from the top of the container. */
            margin-top: -5px;

            font-size: 1.2em;
            line-height: normal;
        }

        .message_embed_description {
            position: relative;
            max-width: 500px;
            margin-top: 3px;

            /* to put it below the container gradient. */
            z-index: -1;
        }

        .message_embed_image {
            display: inline-block;
            width: 70px;
            height: 70px;
            background-size: cover;
            background-position: center;
        }

        .data-container {
            position: relative;
            padding: 0px 5px;
            display: inline-block;
            vertical-align: top;
            max-width: calc(100% - 115px);
            max-height: 80px;
            overflow: hidden;
        }

        .data-container div {
            display: block;
            border: none;
        }

        .data-container::after {
            content: " ";
            position: absolute;
            width: 100%;
            height: 10%;
            bottom: 0;

            background: linear-gradient(0deg, hsl(0, 0%, 100%), transparent 100%);
        }
    }

    &.rtl .message_embed {
        border-left: unset;
        border-right: 3px solid hsl(0, 0%, 93%);
    }

    .message_embed > * {
        display: inherit;
        padding: 5px;
        border: none;
    }
}

@media (max-width: 600px) {
    .rendered_markdown .message_embed {
        height: auto;

        .message_embed_image {
            width: 100%;
            height: 100px;
        }

        .data-container {
            display: block;
            max-width: 100%;
            margin-top: 10px;
        }
    }
}

/* Inline and block code.

TODO: It is likely that this CSS can and should be moved into the
rendered_markdown block; we just need to do further analysis to
confirm doing so won't break anything. */

code {
    /* 12/14 em, so bootstrap's default 12 px,
       when body is the default 14 px */
    font-size: 0.857em;
    unicode-bidi: embed;
    direction: ltr;
}

.rendered_markdown code {
    white-space: pre-wrap;
    padding: 0px 4px;
    background-color: hsl(0, 0%, 100%);
}

.codehilite {
    display: block !important;
    border: none !important;
    background: none !important;
}

pre {
    direction: ltr;
    /* code block text is a bit smaller than normal text */
    font-size: 0.8em;
    line-height: 1.4;
    white-space: pre;
    overflow-x: auto;
    word-wrap: normal;
    /* Bootstrap's default here is top: 0px, bottom: 10px */
    margin-top: 5px;
    margin-bottom: 5px;
    /* Bootstrap's default here is 9.5 on all sides */
    padding-top: 5px;
    padding-bottom: 3px;
    padding-left: 7px;
    padding-right: 7px;
}

.rendered_markdown pre code {
    font-size: inherit;
    padding: 0;
    white-space: inherit;
}

/* Ensure the horizontal scrollbar is visible on Mac */
pre::-webkit-scrollbar {
    height: 8px;

    background-color: hsla(0, 0%, 0%, 0.05);
}

pre::-webkit-scrollbar-thumb {
    background-color: hsla(0, 0%, 0%, 0.3);
    border-radius: 20px;

    transition: all 0.2s ease;
}

pre::-webkit-scrollbar-thumb:hover {
    background-color: hsla(0, 0%, 0%, 0.6);
}

pre code {
    overflow-x: scroll;
    white-space: pre;
}

/* Style inline code inside a link
   to look more like a normal link */
a code {
    color: hsl(200, 100%, 40%);
    border-color: hsl(200, 100%, 40%);
}

a:hover code {
    color: hsl(200, 100%, 25%);
    border-color: hsl(200, 100%, 25%);
}

/* Search highlight used in both topics and rendered_markdown */
.highlight {
    background-color: hsl(51, 94%, 74%);
}