fix size font mobile

web/app/themes/la_mine/src/assets/scss/components/_hero.scss

@@ -28,16 +28,24 @@
             color: $colorWhite;
             h1{
                 text-transform: uppercase;
-                font-size: 3rem;
+                font-size: 2rem;
                 line-height: 1.2;
                 font-family: 'millimetre-regular';
+                @media screen and (min-width: 576px) {
+                    font-size: 3rem;
+                    line-height : 1.2;
+                }
             }
             h2{
                 font-family: 'Fantasque-Sans-Mono';
                 font-weight: bold;
                 font-style: italic;
-                font-size: 2.5rem;
+                font-size: 1.5rem;
                 line-height: 1.25;
+                @media screen and (min-width: 576px) {
+                    font-size: 2.5rem;
+                    line-height: 1.25;
+                }
             }
             @media screen and (min-width: 576px) {
                 & > * {