diff --git a/xmodule/assets/LTIBlockDisplay.scss b/xmodule/assets/LTIBlockDisplay.scss
deleted file mode 100644
index ea92202df2ad..000000000000
--- a/xmodule/assets/LTIBlockDisplay.scss
+++ /dev/null
@@ -1,3 +0,0 @@
-.xmodule_display.xmodule_LTIBlock {
-  @import "lti/lti.scss";
-}
diff --git a/xmodule/assets/lti/_lti.scss b/xmodule/assets/lti/_lti.scss
deleted file mode 100644
index 4bd2c41317f5..000000000000
--- a/xmodule/assets/lti/_lti.scss
+++ /dev/null
@@ -1,65 +0,0 @@
-@import 'bourbon/bourbon';
-@import 'lms/theme/variables';
-@import 'bootstrap/scss/variables';
-@import 'lms/theme/variables-v1';
-@import 'base/mixins';
-
-h2.problem-header {
-  display: inline-block;
-}
-
-div.problem-progress {
-  display: inline-block;
-  padding-left: ($baseline/4);
-  color: #666;
-  font-weight: 100;
-  font-size: em(16);
-}
-
-
-div.lti {
-  // align center
-  margin: 0 auto;
-
-  .wrapper-lti-link {
-    @include font-size(14);
-
-    background-color: $sidebar-color;
-    padding: $baseline;
-
-    .lti-link {
-      margin-bottom: 0;
-      text-align: right;
-
-      .link_lti_new_window {
-        @extend .gray-button;
-
-        @include font-size(13);
-        @include line-height(14);
-      }
-    }
-  }
-
-  form.ltiLaunchForm {
-    display: none;
-  }
-
-  iframe.ltiLaunchFrame {
-    width: 100%;
-    height: 800px;
-    display: block;
-    border: 0px;
-  }
-
-  h4.problem-feedback-label {
-    font-weight: 100;
-    font-size: em(16);
-    font-family: "Source Sans", "Open Sans", Verdana, Geneva, sans-serif, sans-serif;
-  }
-
-  div.problem-feedback {
-    margin-top: ($baseline/4);
-    margin-bottom: ($baseline/4);
-
-  }
-}
diff --git a/xmodule/lti_block.py b/xmodule/lti_block.py
index 55f940b381c2..e7c173075b4e 100644
--- a/xmodule/lti_block.py
+++ b/xmodule/lti_block.py
@@ -84,7 +84,7 @@
 )
 from xmodule.lti_2_util import LTI20BlockMixin, LTIError
 from xmodule.raw_block import EmptyDataRawMixin
-from xmodule.util.builtin_assets import add_webpack_js_to_fragment, add_sass_to_fragment
+from xmodule.util.builtin_assets import add_webpack_js_to_fragment, add_css_to_fragment
 from xmodule.xml_block import XmlMixin
 from xmodule.x_module import (
     ResourceTemplates,
@@ -524,7 +524,7 @@ def student_view(self, _context):
         """
         fragment = Fragment()
         fragment.add_content(self.runtime.service(self, 'mako').render_lms_template('lti.html', self.get_context()))
-        add_sass_to_fragment(fragment, 'LTIBlockDisplay.scss')
+        add_css_to_fragment(fragment, 'LTIBlockDisplay.css')
         add_webpack_js_to_fragment(fragment, 'LTIBlockDisplay')
         shim_xmodule_js(fragment, 'LTI')
         return fragment
diff --git a/xmodule/static/css-builtin-blocks/LTIBlockDisplay.css b/xmodule/static/css-builtin-blocks/LTIBlockDisplay.css
new file mode 100644
index 000000000000..294dfc9a832b
--- /dev/null
+++ b/xmodule/static/css-builtin-blocks/LTIBlockDisplay.css
@@ -0,0 +1,62 @@
+@import url("https://fonts.googleapis.com/css?family=Open+Sans:300,400,400i,600,700");
+
+.xmodule_display.xmodule_LTIBlock {
+    /* stylelint-disable-line */
+    /* stylelint-disable-line */
+    /* stylelint-disable-line */
+    /* stylelint-disable-line */
+}
+
+.xmodule_display.xmodule_LTIBlock h2.problem-header {
+    display: inline-block;
+}
+
+.xmodule_display.xmodule_LTIBlock div.problem-progress {
+    display: inline-block;
+    padding-left: calc((var(--baseline)/4));
+    color: #666;
+    font-weight: 100;
+    font-size: 1em;
+}
+
+.xmodule_display.xmodule_LTIBlock div.lti {
+    margin: 0 auto;
+}
+
+.xmodule_display.xmodule_LTIBlock div.lti .wrapper-lti-link {
+    font-size: 14px;
+    background-color: var(--sidebar-color);
+    padding: var(--baseline);
+}
+
+.xmodule_display.xmodule_LTIBlock div.lti .wrapper-lti-link .lti-link {
+    margin-bottom: 0;
+    text-align: right;
+}
+
+.xmodule_display.xmodule_LTIBlock div.lti .wrapper-lti-link .lti-link .link_lti_new_window {
+    font-size: 13px;
+    line-height: 20.72px;
+}
+
+.xmodule_display.xmodule_LTIBlock div.lti form.ltiLaunchForm {
+    display: none;
+}
+
+.xmodule_display.xmodule_LTIBlock div.lti iframe.ltiLaunchFrame {
+    width: 100%;
+    height: 800px;
+    display: block;
+    border: 0px;
+}
+
+.xmodule_display.xmodule_LTIBlock div.lti h4.problem-feedback-label {
+    font-weight: 100;
+    font-size: 1em;
+    font-family: "Source Sans", "Open Sans", Verdana, Geneva, sans-serif, sans-serif;
+}
+
+.xmodule_display.xmodule_LTIBlock div.lti div.problem-feedback {
+    margin-top: calc((var(--baseline)/4));
+    margin-bottom: calc((var(--baseline)/4));
+}