Use stylelint

src/components/attachment/attachment.scss

@@ -1,4 +1,4 @@
-@import '../../_variables.scss';
+@import "../../variables";
 
 .Attachment {
   display: inline-flex;
@@ -102,14 +102,13 @@
     padding-top: 0.5em;
   }
 
-
   .play-icon {
     position: absolute;
     font-size: 64px;
     top: calc(50% - 32px);
     left: calc(50% - 32px);
-    color: rgba(255, 255, 255, 0.75);
-    text-shadow: 0 0 2px rgba(0, 0, 0, 0.4);
+    color: rgb(255 255 255 / 75%);
+    text-shadow: 0 0 2px rgb(0 0 0 / 40%);
 
     &::before {
       margin: 0;
@@ -135,18 +134,32 @@
       margin-left: 0.5em;
       font-size: 1.25em;
       // TODO: theming? hard to theme with unknown background image color
-      background: rgba(230, 230, 230, 0.7);
+      background: rgb(230 230 230 / 70%);
 
       .svg-inline--fa {
-        color: rgba(0, 0, 0, 0.6);
+        color: rgb(0 0 0 / 60%);
       }
 
       &:hover .svg-inline--fa {
-        color: rgba(0, 0, 0, 0.9);
+        color: rgb(0 0 0 / 90%);
       }
     }
   }
 
+  &.-contain-fit {
+    img,
+    canvas {
+      object-fit: contain;
+    }
+  }
+
+  &.-cover-fit {
+    img,
+    canvas {
+      object-fit: cover;
+    }
+  }
+
   .oembed-container {
     line-height: 1.2em;
     flex: 1 0 100%;
@@ -160,8 +173,9 @@
 
     .image {
       flex: 1;
+
       img {
-        border: 0px;
+        border: 0;
         border-radius: 5px;
         height: 100%;
         object-fit: cover;
@@ -172,9 +186,10 @@
       flex: 2;
       margin: 8px;
       word-break: break-all;
+
       h1 {
         font-size: 1rem;
-        margin: 0px;
+        margin: 0;
       }
     }
   }
@@ -251,18 +266,4 @@
   &.-loading {
     cursor: progress;
   }
-
-  &.-contain-fit {
-    img,
-    canvas {
-      object-fit: contain;
-    }
-  }
-
-  &.-cover-fit {
-    img,
-    canvas {
-      object-fit: cover;
-    }
-  }
 }