fix broken and deprecated CSS

speak property is deprecated 

broken display properties which was useless

css/style.css

@@ -122,7 +122,6 @@ sup {
     font-family: "stack-icons";
     font-style: normal;
     font-weight: normal;
-    speak: never;
     display: inline-block;
     text-decoration: inherit;
     text-align: center;
@@ -1147,7 +1146,6 @@ header .container {
 
 #download .container:before {
     content: 'download';
-    display; block;
     color: gainsboro;
     font-family: 'Noto Sans', sans-serif;
     font-weight: 700;
@@ -1299,7 +1297,6 @@ header .container {
 
 #features .container:before {
     content: 'features';
-    display; block;
     color: gainsboro;
     font-family: 'Noto Sans', sans-serif;
     font-weight: 700;
@@ -1499,7 +1496,6 @@ header .container {
 
 #support .container:before {
     content: 'support';
-    display; block;
     color: gainsboro;
     font-family: 'Noto Sans', sans-serif;
     font-weight: 700;

index.html

@@ -65,7 +65,7 @@ permalink: /index.html
                 </div>
                 <div class="card col feature-icon">
                     <img src="/img/android-sys.svg">
-                    <h3>Stack as Android APK</h3>
+                    <h3>Stack on Android APK</h3>
                     <p>For advanced users, Stack Wallet is available on Android APK.</p>
                     <a href="https://github.com/cypherstack/stack_wallet/releases/latest">
                         Download Stack
@@ -214,7 +214,7 @@ permalink: /index.html
                             <p>Custom made backup capabilities mean you can safely and securely restore ALL of yours wallets in two easy steps.</p>
                         </div>
                         <div class="col">
-                            <p>Save multiple cryptocurrency addresses under one contact and assign an emoji.</p>
+                            <p>Save multiple cryptocurrency addresses under one contact and assign an emoji</p>
                         </div>
                         <div class="col">
                             <p>Testnet support: Most coins we support come with their testnet alternatives also. Simply enter advanced mode.</p>