responsive design

sass/header.scss

@@ -9,9 +9,15 @@ nav {
         align-items: center;
         gap: 2rem;
     }
+
     .nav-right > a {
         display: flex;
     }
+
+    .nav-btn {
+        display: none;
+    }
+
     a {
         text-decoration: none;
         font-size: 1.5rem;
@@ -26,4 +32,30 @@ nav {
     .nav-left img {
         height: 4rem;
     }
+}
+
+@media only screen and (max-width: 768px) {
+    nav {
+        flex-wrap: wrap;
+    }
+    .nav-right {
+        display: none !important;
+    }
+    .mobile-visible {
+        display: flex !important;
+        flex-direction: column;
+        justify-content: center;
+        width: 100%;
+        margin-top: 2rem;
+    }
+
+    .nav-btn {
+        display: flex !important;
+        align-items: center;
+
+        img {
+            height: 3rem;
+            cursor: pointer;
+        }
+    }
 }

sass/main.scss

@@ -16,6 +16,8 @@ main {
         padding: 2rem;
         background-color: var(--clr-cards);
         border-radius: 15px;
+        position: sticky;
+        top: 0;
 
         section#vstupenky-wrapper {
             display: flex;
@@ -75,3 +77,54 @@ main {
         }
     }
 }
+
+@media only screen and (max-width: 500px) {
+    #vstupenky-wrapper {
+        width: 100vw !important;
+    }
+    .vstupenky {
+        font-size: 1.5rem !important;
+    }
+}
+ /* Extra small devices (phones, 600px and down) */
+@media only screen and (max-width: 600px) {
+    aside, main section#news {
+        width: 95vw !important;
+    }
+    body {
+        background-color: red;
+    }
+}
+
+/* Small devices (portrait tablets and large phones, 600px and up) */
+@media only screen and (min-width: 600px) and (max-width: 768px) {
+    aside, main section#news {
+        width: 90vw !important;
+    }
+}
+
+
+/* Medium devices (landscape tablets, 768px and up) */
+@media only screen and (min-width: 768px) and (max-width: 992px) {
+    
+    aside, main section#news {
+        width: 60vw !important;
+    } 
+}
+
+/* Large devices (laptops/desktops, 992px and up) */
+@media only screen and (max-width: 992px) {
+main {
+        flex-direction: column;
+        align-items: center;
+    }
+    .aside-wrapper {
+        order: -1;
+    }
+
+}
+
+/* Extra large devices (large laptops and desktops, 1200px and up) */
+@media only screen and (max-width: 1200px) {
+
+}