first commit

media/com_installer/css/installer.css

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+/**
+ * @copyright   (C) 2017 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+#loading {
+  position: fixed;
+  overflow: hidden;
+  background-color: rgba(255, 255, 255, .8);
+  background-image: url("../../system/images/ajax-loader.gif?v=144b8c");
+  background-repeat: no-repeat;
+  background-position: center center;
+  opacity: .8;
+}
+
+#dragarea {
+  box-sizing: border-box;
+  width: 100%;
+  padding: 5% 0;
+  background-color: var(--body-bg);
+  border: 1px dashed #999;
+  transition: all .2s ease 0s;
+}
+
+#upload-icon {
+  width: auto;
+  height: auto;
+  margin: 0;
+  font-size: 48px;
+  line-height: 175%;
+  color: #999;
+  transition: all .2s;
+}
+
+#dragarea.hover {
+  background-color: #eee;
+  border-color: #666;
+}
+
+#dragarea.hover #upload-icon,
+#dragarea p.lead {
+  color: #666;
+}
+
+@media (prefers-color-scheme: dark) {
+  #dragarea p.lead {
+    color: #999;
+  }
+}
+
+.upload-progress, .install-progress {
+  width: 50%;
+  margin: 5px auto;
+}
+
+/* Default transition (.3s) is too slow, progress will not run to 100% */
+.upload-progress .progress .bar {
+  /* stylelint-disable */
+  -webkit-transition: width .1s;
+  -moz-transition: width .1s;
+  -o-transition: width .1s;
+  /* stylelint-enable */
+  transition: width .1s;
+}
+
+#dragarea[data-state=pending] .upload-progress {
+  display: none;
+}
+
+#dragarea[data-state=pending] .install-progress {
+  display: none;
+}
+
+#dragarea[data-state=uploading] .install-progress {
+  display: none;
+}
+
+#dragarea[data-state=uploading] .upload-actions {
+  display: none;
+}
+
+#dragarea[data-state=installing] .upload-progress {
+  display: none;
+}
+
+#dragarea[data-state=installing] .upload-actions {
+  display: none;
+}