.table th:not([align]) {
    text-align: left;
}

hr {
    
    margin-top: 0.5em;
    margin-bottom: 0.5em;
    margin-left: auto;
    margin-right: auto;
    border-style: double;
    border-width: 1px;
  }

ul {
    white-space: nowrap;
  }
  
ul, li {
list-style: none;
display: inline;
position:relative;
}

/* Create two equal columns that floats next to each other */
.column {
    float: left;
    width: 50%;  }
  
/* Clear floats after the columns */
.row:after {
    content: "";
    display: table;
    clear: both;
}


 


.video {
    min-height: 6rem;
    /* border: 1px dashed red; */
}
/* .video:nth-child(4n),
.video:nth-child(5n),
.video:nth-child(6n) {
    min-height: 3rem;
    /* border: 1px dashed orange; */
} */ */

.center {
    display: block;
    margin-left: auto;
    margin-right: auto;
    /* width: 35%; */
  }

author {
    margin-right: 10px;
    margin-left: 10px;
}

/* ai-arxiv:before {
    content: "\e974";
} */

.main-container {
    max-width: 2000px;
    margin-left: auto;
    margin-right: auto;
}

project-icons {
    float: left;
    position: relative;
    display: block;
    margin-right: 100px;
}

code {
    color: inherit;
    background-color: rgba(0, 0, 0, 0.04);
}

img {
    max-width: 100%;
}

img.logo {
    float: left;
    padding-left: 30px;
    margin-left: 30px;
}

p.paragraph {
    text-align: justify;
    text-justify: inter-word;

}


.tabbed-pane {
    padding-top: 12px;
}

.html-widget {
    margin-bottom: 20px;
}

button.code-folding-btn:focus {
    outline: none;
}

summary {
    display: list-item;
}


/* padding for bootstrap navbar */
body {
    padding-top: 52px;
    padding-bottom: 40px;
}

/* offset scroll position for anchor links (for fixed navbar)  */
.section h1 {
    padding-top: 57px;
    margin-top: -57px;
}

.section h2 {
    padding-top: 57px;
    margin-top: -57px;
}

.section h3 {
    padding-top: 57px;
    margin-top: -57px;
}

.section h4 {
    padding-top: 57px;
    margin-top: -57px;
}

.section h5 {
    padding-top: 57px;
    margin-top: -57px;
}

.section h6 {
    padding-top: 57px;
    margin-top: -57px;
}


.toc-content {
    padding-left: 10px;
    padding-right: 40px;
}


a.button,
button {
    display: inline-block;
    padding: 5px;
    font-family: 'lucida grande', tahoma, verdana, arial, sans-serif;
    font-size: 12px;
    color: #3C3C3D;
    text-shadow: 1px 1px 0 #FFFFFF;
    background: #ECECEC url('../images/css3buttons_backgrounds.png') 0 0 no-repeat;
    white-space: nowrap;
    overflow: visible;
    cursor: pointer;
    text-decoration: none;
    border: 1px solid #CACACA;
    -webkit-border-radius: 2px;
    -moz-border-radius: 2px;
    border-radius: 2px;
    outline: none;
    position: relative;
    zoom: 1;
    line-height: 1.11;
    *display: inline;
    *vertical-align: middle;
}

button {
    margin-left: 0;
    margin-right: 0;
    *padding: 5px 5px 3px 5px;
}

a.button {
    -moz-user-select: none;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

button::-moz-focus-inner {
    border: 0;
    padding: 0px;
}

a.button.primary,
button.primary {
    font-weight: bold
}

button:focus,
a.button:hover,
button:hover {
    color: #FFFFFF;
    border-color: #388AD4;
    text-decoration: none;
    text-shadow: -1px -1px 0 rgba(0, 0, 0, 0.3);
    background-position: 0 -40px;
    background-color: #2D7DC5;
}

a.button:active,
button:active,
a.button.active,
button.active {
    background-position: 0 -81px;
    border-color: #347BBA;
    background-color: #0F5EA2;
    color: #FFFFFF;
    text-shadow: none;
}

a.button:active,
button:active {
    top: 1px
}

a.button.negative:hover,
button.negative:hover {
    color: #FFFFFF;
    background-position: 0 -121px;
    background-color: #D84743;
    border-color: #911D1B;
}

a.button.negative:active,
button.negative:active,
a.button.negative.active,
button.negative.active {
    background-position: 0 -161px;
    background-color: #A5211E;
    border-color: #911D1B;
}

a.button.positive:hover,
button.positive:hover {
    background-position: 0 -280px;
    background-color: #96ED89;
    border-color: #45BF55;
}

a.button.positive:active,
button.positive:active,
a.button.positive.active,
button.positive.active {
    background-position: 0 -320px;
    background-color: #45BF55;
}

a.button.pill,
button.pill {
    -webkit-border-radius: 19px;
    -moz-border-radius: 19px;
    border-radius: 19px;
    padding: 5px 10px 4px 10px;
    *padding: 4px 10px;
}

a.button.left,
button.left {
    -webkit-border-bottom-right-radius: 0px;
    -webkit-border-top-right-radius: 0px;
    -moz-border-radius-bottomright: 0px;
    -moz-border-radius-topright: 0px;
    border-bottom-right-radius: 0px;
    border-top-right-radius: 0px;
    margin-right: 0px;
    border-right: none;
}



a.button.middle,
button.middle {
    margin-right: 0px;
    margin-left: 0px;
    -webkit-border-radius: 0px;
    -moz-border-radius: 0px;
    border-radius: 0px;
    border-right: none;
}

a.button.right,
button.right {
    -webkit-border-bottom-left-radius: 0px;
    -webkit-border-top-left-radius: 0px;
    -moz-border-radius-bottomleft: 0px;
    -moz-border-radius-topleft: 0px;
    border-top-left-radius: 0px;
    border-bottom-left-radius: 0px;
    margin-left: 0px;
}

a.button.left:active,
button.left:active,
a.button.middle:active,
button.middle:active,
a.button.right:active,
button.right:active {
    top: 0px
}

a.button.big,
button.big {
    font-size: 16px;
    padding-left: 14px;
    padding-right: 17px;
}

button.big {
    *padding: 4px 17px 2px 17px;
}

a.button span.icon,
button span.icon {
    display: inline-block;
    width: 14px;
    height: 12px;
    margin: auto 7px auto auto;
    position: relative;
    top: 0;
    *top: 0px;
    background-image: url('../images/css3buttons_icons.png');
    background-repeat: no-repeat;
}

a.big.button span.icon,
button.big span.icon {
    top: 0px
}

a.button span.icon.book,
button span.icon.book {
    background-position: 0 0
}

a.button:hover span.icon.book,
button:hover span.icon.book {
    background-position: 0 -15px
}

a.button span.icon.calendar,
button span.icon.calendar {
    background-position: 0 -30px
}

a.button:hover span.icon.calendar,
button:hover span.icon.calendar {
    background-position: 0 -45px
}

a.button span.icon.chat,
button span.icon.chat {
    background-position: 0 -60px
}

a.button:hover span.icon.chat,
button:hover span.icon.chat {
    background-position: 0 -75px
}

a.button span.icon.check,
button span.icon.check {
    background-position: 0 -90px
}

a.button:hover span.icon.check,
button:hover span.icon.check {
    background-position: 0 -103px
}

a.button span.icon.clock,
button span.icon.clock {
    background-position: 0 -116px
}

a.button:hover span.icon.clock,
button:hover span.icon.clock {
    background-position: 0 -131px
}

a.button span.icon.cog,
button span.icon.cog {
    background-position: 0 -146px
}

a.button:hover span.icon.cog,
button:hover span.icon.cog {
    background-position: 0 -161px
}

a.button span.icon.comment,
button span.icon.comment {
    background-position: 0 -176px
}

a.button:hover span.icon.comment,
button:hover span.icon.comment {
    background-position: 0 -190px
}

a.button span.icon.cross,
button span.icon.cross {
    background-position: 0 -204px
}

a.button:hover span.icon.cross,
button:hover span.icon.cross {
    background-position: 0 -219px
}

a.button span.icon.downarrow,
button span.icon.downarrow {
    background-position: 0 -234px
}

a.button:hover span.icon.downarrow,
button:hover span.icon.downarrow {
    background-position: 0 -249px
}

a.button span.icon.fork,
button span.icon.fork {
    background-position: 0 -264px
}

a.button:hover span.icon.fork,
button:hover span.icon.fork {
    background-position: 0 -279px
}

a.button span.icon.heart,
button span.icon.heart {
    background-position: 0 -294px
}

a.button:hover span.icon.heart,
button:hover span.icon.heart {
    background-position: 0 -308px
}

a.button span.icon.home,
button span.icon.home {
    background-position: 0 -322px
}

a.button:hover span.icon.home,
button:hover span.icon.home {
    background-position: 0 -337px
}

a.button span.icon.key,
button span.icon.key {
    background-position: 0 -352px
}

a.button:hover span.icon.key,
button:hover span.icon.key {
    background-position: 0 -367px
}

a.button span.icon.leftarrow,
button span.icon.leftarrow {
    background-position: 0 -382px
}

a.button:hover span.icon.leftarrow,
button:hover span.icon.leftarrow {
    background-position: 0 -397px
}

a.button span.icon.lock,
button span.icon.lock {
    background-position: 0 -412px
}

a.button:hover span.icon.lock,
button:hover span.icon.lock {
    background-position: 0 -427px
}

a.button span.icon.loop,
button span.icon.loop {
    background-position: 0 -442px
}

a.button:hover span.icon.loop,
button:hover span.icon.loop {
    background-position: 0 -457px
}

a.button span.icon.magnifier,
button span.icon.magnifier {
    background-position: 0 -472px
}

a.button:hover span.icon.magnifier,
button:hover span.icon.magnifier {
    background-position: 0 -487px
}

a.button span.icon.mail,
button span.icon.mail {
    background-position: 0 -502px
}

a.button:hover span.icon.mail,
button:hover span.icon.mail {
    background-position: 0 -514px
}

a.button span.icon.move,
button span.icon.move {
    background-position: 0 -526px
}

a.button:hover span.icon.move,
button:hover span.icon.move {
    background-position: 0 -541px
}

a.button span.icon.pen,
button span.icon.pen {
    background-position: 0 -556px
}

a.button:hover span.icon.pen,
button:hover span.icon.pen {
    background-position: 0 -571px
}

a.button span.icon.pin,
button span.icon.pin {
    background-position: 0 -586px
}

a.button:hover span.icon.pin,
button:hover span.icon.pin {
    background-position: 0 -601px
}

a.button span.icon.plus,
button span.icon.plus {
    background-position: 0 -616px
}

a.button:hover span.icon.plus,
button:hover span.icon.plus {
    background-position: 0 -631px
}

a.button span.icon.reload,
button span.icon.reload {
    background-position: 0 -646px
}

a.button:hover span.icon.reload,
button:hover span.icon.reload {
    background-position: 0 -660px
}

a.button span.icon.rightarrow,
button span.icon.rightarrow {
    background-position: 0 -674px
}

a.button:hover span.icon.rightarrow,
button:hover span.icon.rightarrow {
    background-position: 0 -689px
}

a.button span.icon.rss,
button span.icon.rss {
    background-position: 0 -704px
}

a.button:hover span.icon.rss,
button:hover span.icon.rss {
    background-position: 0 -719px
}

a.button span.icon.tag,
button span.icon.tag {
    background-position: 0 -734px
}

a.button:hover span.icon.tag,
button:hover span.icon.tag {
    background-position: 0 -749px
}

a.button span.icon.trash,
button span.icon.trash {
    background-position: 0 -764px
}

a.button:hover span.icon.trash,
button:hover span.icon.trash {
    background-position: 0 -779px
}

a.button span.icon.unlock,
button span.icon.unlock {
    background-position: 0 -794px
}

a.button:hover span.icon.unlock,
button:hover span.icon.unlock {
    background-position: 0 -809px
}

a.button span.icon.uparrow,
button span.icon.uparrow {
    background-position: 0 -824px
}

a.button:hover span.icon.uparrow,
button:hover span.icon.uparrow {
    background-position: 0 -839px
}

a.button span.icon.user,
button span.icon.user {
    background-position: 0 -854px
}

a.button:hover span.icon.user,
button:hover span.icon.user {
    background-position: 0 -869px
}

a {
    position: relative;
    display: inline-block;
    transition: .3s;
    text-decoration: none;
}

a::after,
a::before {
    position: absolute;
    left: 0;
    content: '';
    width: 100%;
    height: 1px;
    background-color: green;
    opacity: 0;
    transition: .3s;
}

a:hover::before {
    top: 0;
    opacity: 1;
}

a:hover::after {
    bottom: 0;
    opacity: 1;
}

a:hover {
    color: green;
}

* {
    box-sizing: border-box;
}

th {
    text-align: left;
}

table {
    width: 60%;
    border: none;
}


body {
    color: #555;
    margin: 0 auto;
    max-width: 75em;
    font-family: "Helvetica", "Arial", sans-serif;
    line-height: 1.5;
    padding: 2em 1em;
}


.desc {
    padding-right: 25px;
    padding-left: 25px;
    font-family: Roboto, sans-serif;
    font-size: 16px;
    line-height: 22px;
    font-weight: 300;
    text-align: justify;
}

h1.title_heading {
    margin-top: 0;
    margin-bottom: 0;
    font-family: 'Varela Round', sans-serif;
    color: #4d4d4d;
    font-size: 50px;
    line-height: 65px;
    font-weight: 700;
    letter-spacing: 4px;
}

h1 {
    /* font-family: Lato, sans-serif; */
    font-size: 2.5em
}

h2 {
    font-size: 2em;
}

h3 {
    font-size: 1.5em
}

h2,
h3 {
    margin-top: 1.5em;
}

h1,
h2,
strong {
    color: #333;
}

code,
pre {
    background: #eee;
}

code {
    padding: 2px 4px;
    vertical-align: text-bottom;
}

pre {
    border-left: 2px solid #bbb;
    padding: 1em;
}

a {
    color: #f56a6a;
}

blockquote,
q {
    border-left: solid 4px #bbb;
    font-style: italic;
    margin: 0 0 2em 0;
    padding: 0.5em 0 0.5em 2em;
}

blockquote::before,
blockquote::after,
q::before,
q::after {
    content: '';
    content: none;
}

video {
    width: 100%;
    object-fit: fill; // use "cover" to avoid distortion
    position: absolute;
}