button style fix

web/layouts/index.html

@@ -48,9 +48,9 @@
                 <a class="button" href="{{$link_linux64_no_install}}">{{ printf (i18n "archive") (i18n "bit_64") }}
                     ({{ i18n "no_install" }})</a></p>
             <h2>Linux (Qt5)</h2>
-            <p><a class="btn btn-dark" href="{{$link_linux64_qt5_deb}}">Qt5 {{ printf (i18n "deb_package") (i18n "bit_64") }}
+            <p><a class="button" href="{{$link_linux64_qt5_deb}}">Qt5 {{ printf (i18n "deb_package") (i18n "bit_64") }}
                     </a>
-                <a class="btn btn-dark" href="{{$link_linux64_qt5_no_install}}">Qt5 {{ printf (i18n "archive") (i18n "bit_64") }}
+                <a class="button" href="{{$link_linux64_qt5_no_install}}">Qt5 {{ printf (i18n "archive") (i18n "bit_64") }}
                     ({{ i18n "no_install" }})</a></p>
             <h2>Rpi</h2>
             <p><a class="button" href="{{$link_rpi32_deb}}">{{ printf (i18n "deb_package") (i18n "bit_32") }}