diff --git a/make_post_sell/static/css/common.css b/make_post_sell/static/css/common.css
index 48f086b..553c392 100644
--- a/make_post_sell/static/css/common.css
+++ b/make_post_sell/static/css/common.css
@@ -727,22 +727,30 @@ pre, code {
 }
 
 .mps-button {
+    /* Normalize so <button>, <a>, and <input type=submit> with this
+       class render identically — without these, <button> elements
+       inherit UA line-height/box-sizing and render squished. */
+    -webkit-appearance: none;
+    appearance: none;
+    box-sizing: border-box;
     border: 2px solid transparent;
     border-radius: var(--radius-sm, 4px);
     color: white;
     background-color: #D4D0C8;
     display: inline-block;
+    font-family: inherit;
     font-size: var(--text-sm, 14px);
     font-weight: var(--weight-bold, bold);
+    line-height: 1.4;
     min-width: 100%;
     margin-top: var(--space-1, 4px);
     margin-bottom: var(--space-1, 4px);
-    padding-top: 14px;
-    padding-bottom: 14px;
+    padding: 12px 16px;
     text-align: center;
     text-decoration: none;
     white-space: nowrap;
     cursor: pointer;
+    vertical-align: middle;
 }
 
 [data-theme="dark"] .mps-button {