diff --git a/css/apps/viewer.scss b/css/apps/viewer.scss
index e324f34..4897709 100644
--- a/css/apps/viewer.scss
+++ b/css/apps/viewer.scss
@@ -35,6 +35,8 @@
                 background-color: var(--nmc-color-regular);
                 border-radius: var(--border-radius-pill);
                 display: flex;
+                align-items: center;
+                justify-content: center;
                 width: 48px;
                 height: 48px;
 
@@ -53,8 +55,6 @@
 
             button.play-pause-icons {
                 margin: calc((var(--header-height) - var(--clickable-area-large)) / 2);
-                padding-left: 0.75rem;
-                padding-right: 0.75rem;
 
                 & > span.material-design-icon {
                     margin: 0;
@@ -62,11 +62,7 @@
 
                 svg.progress-ring {
                     width: 48px;
-                    height: 44px;
-                    circle {
-                        cx: 22;
-                        cy: 22;
-                    }
+                    height: 48px;
                 }
             }