/* LAYOUT */

body {
    margin: 0 1em;
    overflow-x: hidden;
    min-width: 280px;
}
#bkgnd {
    z-index: -1;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}
.container {
    padding-bottom: 1em;
    margin-top: 1em;
    margin-bottom: 1em;
    border-radius: 1em;
}




/* FONTS */

body {
    font-family: 'Ubuntu', sans-serif;
}
pre, tt, code, kbd, samp, var {
    font-family: 'Ubuntu Mono', monospace;
}




/* COLOURS */

.container {
    background: #fff;
}
h1, h2, .h1, .h2 {
    color: #993300;
    filter: hue-rotate(0) saturate(200%);
}
a,
nav .burger {
    color: #993300;
    filter: hue-rotate(0) saturate(200%);
    transition: filter 1s;
}
a:hover,
nav .burger:hover {
    color: #993300; /* override bootstrap */
    filter: hue-rotate(-90deg) saturate(100%);
}
h1, h2, .h1, .h2 {
    animation-duration: 30s;
    animation-iteration-count: infinite;
    animation-name: textcolor-1;
}
@keyframes textcolor-1 {
    0%   { filter: hue-rotate(0) saturate(200%) }

    20%  { filter: hue-rotate(0) saturate(150%) }
    25%  { filter: hue-rotate(-45deg) saturate(150%) }

    45%  { filter: hue-rotate(-45deg) saturate(400%) }
    50%  { filter: hue-rotate(0) saturate(400%) }

    70%  { filter: hue-rotate(0) saturate(150%) }
    75%  { filter: hue-rotate(15deg) saturate(150%) }

    95%  { filter: hue-rotate(15deg) saturate(200%) }
    100% { filter: hue-rotate(0) saturate(200%) }
}





/* TYPOGRAPHY */

h1, h2, .h1, .h2 {
    font-weight: bold;
}
h1, h2, .h1, .h2 {
    padding-top: 2em; /* headed does not obliterate heading after #link click */
}
h3, h4, .h3, .h4 {
    margin-top: 1em;
}




/* HEADER */

header {
    z-index: 1;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 55px;
    background: #fff;
    transition: opacity 1s, visibility 1s 0s;
}
body.at-top header {
    opacity: 0;
    visibility: hidden;
}
header .logo-wrap {
    display: block;
}
header a.logo-wrap:hover {
    filter: none; /* override hue-rotate(-90deg) */
}

header .logo-wrap >span {
    position: absolute;
    overflow: hidden;
    transform-origin: top left;
}
#logo-image {
    top: 4px;
    left: 4px;
    width: 700px;
    height: 700px;
    transform: scale(0.0625, 0.0625);
    backface-visibility: hidden;
    padding: 2px;
}
#logo-image .logo {
    margin: -130px 0 0 -250px;
}
#logo-text {
    top: 10px;
    left: 50px;
    width: 900px;
    height: 150px;
    transform: scale(0.2, 0.2);
}
#logo-text .logo {
    margin: -820px 0 0 -190px;
}
nav {
    float: right;
    padding-right: 0.2em;
}
nav .burger {
    position: fixed;
    display: none;
    top: -10px;
    right: 7px;
    padding: 0 0.2em;
    font-size: 48px;
    line-height: 8px;
    color: #993300;
    cursor: pointer;
}
nav a {
    display: inline-block;
    padding: 0.9em 0.5em;
    background: #fff;
}
@media screen and (max-width: 540px) {
    nav {
        overflow: visible;
        height: 400px;
        transition: height 0.5s 0s;
    }
    body.show-burger nav {
        overflow: hidden;
        height: 50px;
    }
    nav .burger {
        display: block;
    }
    nav a:first-of-type {
        margin-top: 3em;
    }
    nav a {
        display: block;
        transform: translate(2em,0);
        transition: transform 0.5s, filter 0.5s;
        padding: 0.5em 5em 0.5em 1.5em;
    }
    body.show-burger nav a {
        transform: translate(10em,0);
    }
}




/* HOMEPAGE INTRO */

#intro {
    text-align: center;
    padding-top: 2px;
}
#intro .logo {
    display: block;
    width: 60%;
    min-width: 260px;
    height: auto;
    margin-left: auto;
    margin-right: auto;
    opacity: 0;
    visibility: hidden;
    outline: 2px solid #fff; /* prevent occasional background appearing at edges */
    outline-offset: -1px;
    transition: opacity 1s, visibility 1s 0s;
}
body.at-top #intro .logo {
    opacity: 1;
    visibility: visible;
}
#intro h2 {
    padding-top: 0;
}
@media screen and (max-width: 767px) {
    #intro h2 { font-size: 1.5em; }
    #intro h4 { font-size: 1.2em; }
}




/* HOMEPAGE MAIN */

#main {
    max-width: 55em;
    margin-left: auto;
    margin-right: auto;
}




/* TIDY GH */
.octicon-link {
    display: none;
}
div.highlight {
    font-size: 1.25em;
    padding: 0.5em;
    background: #eee;
    border-radius: 0.5em;
}
div.highlight pre {
    overflow-x: scroll;
}
code {
    font-size: 1em;
    padding: 0.1em 0.3em 0.2em;
    background: #eee;
    color: #000;
    border-radius: 0.15em;
}
pre .pl-k   { color:#d73a49 } /* reserved words and punctution */
pre .pl-c1  { color:#005cc5 } /* variables */
pre .pl-cce { color:#d73a49 } /* escaped string */
pre .pl-c   { color:#6a737d } /* comment */
pre .pl-en  { color:#6f42c1 } /* JS Objects */
@media screen and (max-width: 991px) {
    div.highlight { font-size: 1em; }
}
@media screen and (max-width: 767px) {
    div.highlight { font-size: 0.8em; }
}




/* BACKGROUND */

#bkgnd,
header .logo-wrap >span,
#intro .logo {
    background:
      radial-gradient(
        ellipse at 0% 25%
        , #993300 25%, transparent 70%, #993300 75%, transparent 80%
      ),
      radial-gradient(
        ellipse at 100% 75%
        , #85279f 25%, #000 70%, #85279f 75%, #000 80%
      );
    background-size: 100% 100%;
}
#bkgnd {
    filter: hue-rotate(-30deg) saturate(100%);
    background-size: 250% 100%;
}
header .logo-wrap >span,
#intro .logo {
    filter: hue-rotate(0) saturate(200%);
    animation-duration: 30s;
    animation-iteration-count: infinite;
    animation-name: abstract-1;
}
@keyframes abstract-1 {
    0%   { filter: hue-rotate(0) saturate(200%); background-size: 100% 100% }

    20%  { filter: hue-rotate(0) saturate(150%) }
    25%  { filter: hue-rotate(-45deg) saturate(150%) }

    45%  { filter: hue-rotate(-45deg) saturate(400%) }
    50%  { filter: hue-rotate(0) saturate(400%); background-size: 100% 300% }

    70%  { filter: hue-rotate(0) saturate(150%) }
    75%  { filter: hue-rotate(15deg) saturate(150%) }

    95%  { filter: hue-rotate(15deg) saturate(200%) }
    100% { filter: hue-rotate(0) saturate(200%); background-size: 100% 100% }
}




/* UTILITY */

.hid {
    display: none;
}
.nopad {
    padding: 0 !important;
    margin: 0 !important;
}
.rr {
    text-align: right;
}