Adding font files

src/base/_btn.scss

@@ -1,4 +1,4 @@
-.btn {
+.btn-flat {
     position: relative;
     color: black;
     border: 0;
@@ -9,6 +9,10 @@
     transition: .05s background-color linear;
 }
 
+.btn {
+    @extend .btn-flat;
+}
+
 .btn-primary {
     background: $primary !important;
     color: $on-primary !important;
@@ -37,6 +41,17 @@
     }
 }
 
+.btn-icon {
+    background-color: unset !important;
+    border: 0 !important;
+    box-shadow: unset !important;
+
+    >svg {
+        height: 1.5rem;
+        width: 1.5rem;
+    }
+}
+
 .fab {
     border-radius: 50%;
     width: 2.5rem;