diff --git a/templates/index.html b/templates/index.html
index a479ca1..87fed01 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -107,9 +107,7 @@ body {
     background: var(--primary);
     color: white;
     border: none;
-    padding: 0.8em 1.5em;
     border-radius: 8px;
-    font-size: 1em;
     cursor: pointer;
     transition: background-color 0.2s;
     font-weight: 500;
@@ -117,6 +115,9 @@ body {
     max-width: 480px;
     min-height: 44px;
     min-width: 44px;
+    padding: 1em 1.2em;
+    font-size: 1.1em;
+    font-weight: bold;
 }
 
 .calculator-btn:hover {
@@ -205,14 +206,15 @@ body {
 
 .calc-btn {
     padding: 0.7em;
-    font-size: 1em;
+    font-size: 1.1em !important;
+    font-family: 'Segoe UI', Arial, sans-serif !important;
     border: 2px solid #374151;
     background: #f9fafb;
     color: #111827;
     border-radius: 8px;
     cursor: pointer;
     transition: all 0.2s;
-    font-weight: 600;
+    font-weight: 600 !important;
     min-width: 44px;
     min-height: 44px;
     display: flex;
@@ -714,7 +716,10 @@ button:focus, .accordion-header:focus {
     
     .calc-btn {
         padding: 0.6em;
-        font-size: 1em;
+        font-size: 1.1em;
+        padding: 1em 1.2em;
+        font-weight: 600;
+        /* font-family: 'Segoe UI', Arial, sans-serif; */
         min-width: 44px;
         min-height: 44px;
     }