diff -u b/core/modules/quickedit/css/quickedit.icons.theme.css b/core/modules/quickedit/css/quickedit.icons.theme.css
--- b/core/modules/quickedit/css/quickedit.icons.theme.css
+++ b/core/modules/quickedit/css/quickedit.icons.theme.css
@@ -44,9 +44,6 @@
   left: 0.5em;
   right: auto;
 }
-button.quickedit-icon {
-  font-size: 1em;
-}
 .quickedit-icon--pencil {
   margin-left: 0.5em;
   padding-left: 1.5em;
diff -u b/core/modules/quickedit/css/quickedit.module.css b/core/modules/quickedit/css/quickedit.module.css
--- b/core/modules/quickedit/css/quickedit.module.css
+++ b/core/modules/quickedit/css/quickedit.module.css
@@ -15,9 +15,6 @@
   position: relative;
   cursor: pointer;
 }
-.quickedit-editable:focus {
-  outline: none;
-}
 
 /**
  * Highlighted (hovered) editable.
@@ -85,7 +82,6 @@
 .quickedit-toolbar__container {
   max-width: 100%;
   position: absolute;
-  max-width: 320px;
   width: 320px;
   z-index: 100;
 }
diff -u b/core/modules/quickedit/css/quickedit.theme.css b/core/modules/quickedit/css/quickedit.theme.css
--- b/core/modules/quickedit/css/quickedit.theme.css
+++ b/core/modules/quickedit/css/quickedit.theme.css
@@ -8,6 +8,7 @@
  */
 .quickedit-editable {
   box-shadow: 0 0 0 2px #74b7ff;
+  outline: none;
 }
 
 /**
@@ -209,7 +210,7 @@
   -webkit-transition: opacity 0.1s ease;
   transition: opacity 0.1s ease;
 }
-.quickedit-button[aria-hidden="true"] {
+[aria-hidden="true"].quickedit-button {
   visibility: hidden;
   opacity: 0;
 }
@@ -221,12 +222,6 @@
   margin-right: 0.25em;
 }
 /* Button with icons. */
-.quickedit-button:hover,
-.quickedit-button:active {
-  /*background-color: #c8c8c8;*/
-  /*border: 1px solid #a0a0a0;*/
-  /*color: #2e2e2e;*/
-}
 .quickedit-button--cancel {
   background-color: transparent;
   border: 1px solid transparent;