diff --git a/src/styles.css b/src/styles.css
index 082a1a6..8d4f558 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -80,6 +80,7 @@ button {
   background-color: #ffffff;
   transition: border-color 0.25s;
   box-shadow: 0 2px 2px rgba(0, 0, 0, 0.2);
+  box-sizing: border-box;
 }
 
 div {
@@ -440,7 +441,7 @@ button {
 }
 
 #newFileDialog .dialog-input {
-  width: calc(100% - 20px);
+  width: 100%;
   padding: 8px;
   margin: 5px 0;
   border: 1px solid #aaa;
@@ -492,7 +493,7 @@ button {
 }
 
 
-@media (prefers-color-scheme: dank) {
+@media (prefers-color-scheme: dark) {
   :root {
     color: #f6f6f6;
     background-color: #2f2f2f;