diff --git a/index.php b/index.php
index 41c17fe..85f509d 100644
--- a/index.php
+++ b/index.php
@@ -6,7 +6,9 @@
         <link rel="stylesheet" href="style.css">
         <style>
             #center {
+                width: 100%;
                 max-width: 900px;
+                min-width: 720px;
                 margin: auto;
                 display: flex;
                 gap: 10px;
@@ -28,7 +30,6 @@
 
             input[type=submit] {
                 float: right;
-                width: 100px;
                 background: var(--accent);
                 color: white;
                 font-weight: 600;