index.css

/* Based on the html5-boilerplate https://github.com/h5bp/html5-boilerplate/blob/master/dist/css/main.css */
html {
    color: #222;
    font-size: 1em;
    line-height: 1.4;
}

::selection {
    background: #b3d4fc;
    text-shadow: none;
}

hr {
    display: block;
    height: 1px;
    border: 0;
    border-top: 1px solid #ccc;
    margin: 1em 0;
    padding: 0;
}

audio,
canvas,
iframe,
img,
svg,
video {
    vertical-align: middle;
}

/*
 * Remove default fieldset styles.
 */

fieldset {
    border: 0;
    margin: 0;
    padding: 0;
}

/*
 * Allow only vertical resizing of textareas.
 */

textarea {
    resize: vertical;
}

/* ==========================================================================
   Browser Upgrade Prompt
   ========================================================================== */

.browserupgrade {
    margin: 0.2em 0;
    background: #ccc;
    color: #000;
    padding: 0.2em 0;
}

/* ==========================================================================
   Author's custom styles
   ========================================================================== */

/* ==========================================================================
   Helper classes
   ========================================================================== */

/*
 * Hide visually and from screen readers
 */

.hidden {
    display: none !important;
}

/*
* Hide only visually, but have it available for screen readers:
* https://snook.ca/archives/html_and_css/hiding-content-for-accessibility
*
* 1. For long content, line feeds are not interpreted as spaces and small width
*    causes content to wrap 1 word per line:
*    https://medium.com/@jessebeach/beware-smushed-off-screen-accessible-text-5952a4c2cbfe
*/

.sr-only {
    border: 0;
    clip: rect(0, 0, 0, 0);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    white-space: nowrap;
    width: 1px;
    /* 1 */
}

/*
* Extends the .sr-only class to allow the element
* to be focusable when navigated to via the keyboard:
* https://www.drupal.org/node/897638
*/

.sr-only.focusable:active,
.sr-only.focusable:focus {
    clip: auto;
    height: auto;
    margin: 0;
    overflow: visible;
    position: static;
    white-space: inherit;
    width: auto;
}

/*
* Hide visually and from screen readers, but maintain layout
*/

.invisible {
    visibility: hidden;
}

/*
* Clearfix: contain floats
*
* For modern browsers
* 1. The space content is one way to avoid an Opera bug when the
*    `contenteditable` attribute is included anywhere else in the document.
*    Otherwise it causes space to appear at the top and bottom of elements
*    that receive the `clearfix` class.
* 2. The use of `table` rather than `block` is only necessary if using
*    `:before` to contain the top-margins of child elements.
*/

.clearfix:before,
.clearfix:after {
    content: " ";
    /* 1 */
    display: table;
    /* 2 */
}

.clearfix:after {
    clear: both;
}

/* ==========================================================================
   EXAMPLE Media Queries for Responsive Design.
   These examples override the primary ('mobile first') styles.
   Modify as content requires.
   ========================================================================== */

@media only screen and (min-width: 35em) {
    /* Style adjustments for viewports that meet the condition */
}

@media print,
(-webkit-min-device-pixel-ratio: 1.25),
(min-resolution: 1.25dppx),
(min-resolution: 120dpi) {
    /* Style adjustments for high resolution devices */
}

/* ==========================================================================
   Print styles.
   Inlined to avoid the additional HTTP request:
   https://www.phpied.com/delay-loading-your-print-css/
   ========================================================================== */

@media print {
    *,
    *:before,
    *:after {
        background: transparent !important;
        color: #000 !important;
        /* Black prints faster */
        box-shadow: none !important;
        text-shadow: none !important;
    }

    a,
    a:visited {
        text-decoration: underline;
    }

    a[href]:after {
        content: " (" attr(href) ")";
    }

    abbr[title]:after {
        content: " (" attr(title) ")";
    }

    /*
       * Don't show links that are fragment identifiers,
       * or use the `javascript:` pseudo protocol
       */
    a[href^="#"]:after,
    a[href^="javascript:"]:after {
        content: "";
    }

    pre {
        white-space: pre-wrap !important;
    }

    pre,
    blockquote {
        border: 1px solid #999;
        page-break-inside: avoid;
    }

    /*
       * Printing Tables:
       * https://web.archive.org/web/20180815150934/http://css-discuss.incutio.com/wiki/Printing_Tables
       */
    thead {
        display: table-header-group;
    }

    tr,
    img {
        page-break-inside: avoid;
    }

    p,
    h2,
    h3 {
        orphans: 3;
        widows: 3;
    }

    h2,
    h3 {
        page-break-after: avoid;
    }
}

h1, h2, h3, h4, p, span, strong, li, body {
    font-family: sans-serif;
}

/*Based on https://hackernoon.com/making-your-links-look-pretty-with-css-practicum-by-yandex-ve8o3377 and https://css-tricks.com/styling-underlines-web/ */
a {
    color: #0f7afc;
    text-decoration: none;
    border-bottom: 1px solid;
    border-bottom-color: rgba(15, 122, 252, 0.2);
}

a:hover {
    color: #cf0000;
    border-bottom-color: rgba(208, 64, 0, 0.2);
}

a:visited {
    color: #800080;
    border-bottom-color: rgba(128, 0, 128, 0.2);
}

body {
    background-color: #eee;
}

.bookmarklet {
    font-weight: bold;
}

img[alt="Google Vision Example"] { height: auto; width: 550px; }