init

user/plugins/problems/scss/_progress.scss

@@ -0,0 +1,45 @@
+// Progress
+// Credit: https://css-tricks.com/html5-progress-element/
+.progress {
+  appearance: none;
+  background: $bg-color-dark;
+  border: 0;
+  border-radius: $border-radius;
+  color: $primary-color;
+  height: $unit-1;
+  position: relative;
+  width: 100%;
+
+  &::-webkit-progress-bar {
+    background: transparent;
+    border-radius: $border-radius;
+  }
+
+  &::-webkit-progress-value {
+    background: $primary-color;
+    border-radius: $border-radius;
+  }
+
+  &::-moz-progress-bar {
+    background: $primary-color;
+    border-radius: $border-radius;
+  }
+
+  &:indeterminate {
+    animation: progress-indeterminate 1.5s linear infinite;
+    background: $bg-color-dark linear-gradient(to right, $primary-color 30%, $bg-color-dark 30%) top left / 150% 150% no-repeat;
+
+    &::-moz-progress-bar {
+      background: transparent;
+    }
+  }
+}
+
+@keyframes progress-indeterminate {
+  0% {
+    background-position: 200% 0;
+  }
+  100% {
+    background-position: -200% 0;
+  }
+}