chore: import upstream snapshot with attribution

static/plugins/scrollup/css/labs.css

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+/* ----------------------------------------
+    Labs page main styles
+---------------------------------------- */
+
+* {
+    -webkit-box-sizing: border-box;
+    -moz-box-sizing: border-box;
+    box-sizing: border-box;
+}
+
+pre {
+    margin: 0;
+    overflow: scroll;
+    background-color: #eee;
+
+    padding: 10px;
+    -webkit-border-radius: 6px;
+    -moz-border-radius: 6px;
+    border-radius: 6px;
+}
+
+pre .cmt { /* pre comment */
+    color: #aaa;
+}
+
+pre .opt { /* pre option */
+    font-weight: bold;
+}
+
+pre .val { /* pre value */
+    font-style: italic;
+}
+
+code {
+    background-color: #eee;
+    color: #333;
+    display: inline-block;
+    padding: 1px 5px;
+}
+
+body {
+    font: 1em/1.8 "Helvetica Neue", Helvetica, Arial, sans-serif;
+    color: #121212;
+    margin: 0;
+    padding: 0;
+}
+
+a {
+    color: #F66169;
+    text-decoration: none;
+}
+
+h2 {
+    margin-top: 2.5em;
+    padding-bottom: .2em;
+    border-bottom: 1px solid #eee;
+}
+
+p {
+    color: #666;
+}
+
+.container {
+    width: 80%;
+    max-width: 620px;
+    margin: auto;
+}
+
+.header {
+    width: 100%;
+    height: 60px;
+    line-height: 60px;
+    background-color: #222;
+    color: #fff;
+    border-bottom: #F66169 3px solid;
+}
+
+.logo {
+    width: 120px;
+    float: left;
+    margin-left: 30px;
+    color: #FAEFDE;
+    font-weight: bold;
+    -webkit-transition: all 200ms ease-out;
+    -moz-transition: all 200ms ease-out;
+    -o-transition: all 200ms ease-out;
+    transition: all 200ms ease-out;
+}
+
+.logo:hover {
+    color: #fff;
+}
+
+.view-article {
+    display: block;
+    text-align: center;
+    background-color: #F66169;
+    color: #FAEFDE;
+    width: 120px;
+    height: 40px;
+    line-height: 40px;
+    font-weight: bold;
+    float: right;
+    margin-right: 30px;
+    margin-top: 8px;
+    -webkit-border-radius: 6px;
+    -moz-border-radius: 6px;
+    border-radius: 6px;
+    -webkit-transition: all 200ms ease-out;
+    -moz-transition: all 200ms ease-out;
+    -o-transition: all 200ms ease-out;
+    transition: all 200ms ease-out;
+}
+
+.view-article:hover {
+    color: #111;
+    background-color: #fff;
+}
+
+.light {
+    color: #ccc;
+    font-size: 14px;
+}
+
+
+
+/* ----------------------------------------
+    Lab specific: scrollUp
+---------------------------------------- */
+
+.themes {
+    padding: 0;
+    margin: 0;
+    margin-bottom: 20px;
+    float: left;
+    width: 100%;
+}
+
+.themes li {
+    text-align: center;
+    display: block;
+    float: left;
+    width: 22%;
+    margin-left: 4%;
+}
+
+.themes li.first {
+    margin-left: 0;
+}
+
+.themes li a {
+    display: block;
+    padding: 10px;
+    background-color: #444;
+    -webkit-border-radius: 6px;
+    -moz-border-radius: 6px;
+    border-radius: 6px;
+    color: #eee;
+    -webkit-transition: all 200ms ease-out;
+    -moz-transition: all 200ms ease-out;
+    -o-transition: all 200ms ease-out;
+    transition: all 200ms ease-out;
+}
+
+.themes li a:hover,
+.themes li a.active {
+    background-color: #F66169;
+    color: #FAEFDE;
+}
+
+#toggleActive {
+    padding: 10px;
+    width: 100%;
+    text-align: center;
+    display: inline-block;
+    background-color: #444;
+    color: #eee;
+    font-size: 14px;
+    cursor: pointer;
+    -webkit-transition: all 200ms ease-out;
+    -moz-transition: all 200ms ease-out;
+    -o-transition: all 200ms ease-out;
+    transition: all 200ms ease-out;
+    -webkit-border-radius: 6px;
+    -moz-border-radius: 6px;
+    border-radius: 6px;
+}
+
+#toggleActive.active {
+    background-color: #F66169;
+    color: #FAEFDE;
+}
+
+#scrollUp-active {
+    display: none;
+}

static/plugins/scrollup/css/themes/image.css

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+/* Image style */
+#scrollUp {
+    background-image: url("../../img/top.png");
+    bottom: 20px;
+    right: 20px;
+    width: 38px;    /* Width of image */
+    height: 38px;   /* Height of image */
+}

static/plugins/scrollup/css/themes/link.css

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+/* Text link style */
+#scrollUp {
+    bottom: 20px;
+    right: 20px;
+}

static/plugins/scrollup/css/themes/pill.css

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+/* Pill style */
+#scrollUp {
+    bottom: 20px;
+    right: 20px;
+    background-color: #555;
+    color: #fff;
+    font-size: 12px;
+    font-family: sans-serif;
+    text-decoration: none;
+    opacity: .9;
+    padding: 10px 20px;
+    -webkit-border-radius: 16px;
+    -moz-border-radius: 16px;
+    border-radius: 16px;
+    -webkit-transition: background 200ms linear;
+    -moz-transition: background 200ms linear;
+    -o-transition: background 200ms linear;
+    transition: background 200ms linear;
+    -webkit-backface-visibility: hidden;
+}
+
+#scrollUp:hover {
+    background-color: #000;
+}

static/plugins/scrollup/css/themes/tab.css

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+/* Tab style */
+#scrollUp {
+    bottom: 0;
+    right: 30px;
+    width: 70px;
+    height: 70px;
+    margin-bottom: -10px;
+    padding: 10px 5px;
+    font: 14px/20px sans-serif;
+    text-align: center;
+    text-decoration: none;
+    text-shadow: 0 1px 0 #fff;
+    color: #828282;
+    -webkit-box-shadow: 0 0 2px 1px rgba(0, 0, 0, 0.2);
+    -moz-box-shadow: 0 0 2px 1px rgba(0, 0, 0, 0.2);
+    box-shadow: 0 0 2px 1px rgba(0, 0, 0, 0.2);
+    background-color: #E6E6E6;
+    background-image: -moz-linear-gradient(top, #EBEBEB, #DEDEDE);
+    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#EBEBEB), to(#DEDEDE));
+    background-image: -webkit-linear-gradient(top, #EBEBEB, #DEDEDE);
+    background-image: -o-linear-gradient(top, #EBEBEB, #DEDEDE);
+    background-image: linear-gradient(to bottom, #EBEBEB, #DEDEDE);
+    background-repeat: repeat-x;
+    -webkit-transition: margin-bottom 150ms linear;
+    -moz-transition: margin-bottom 150ms linear;
+    -o-transition: margin-bottom 150ms linear;
+    transition: margin-bottom 150ms linear;
+}
+
+#scrollUp:hover {
+    margin-bottom: 0;
+}