give a static height to the page header

Signed-off-by: ngn <ngn@ngn.tf>

app/src/components/header.svelte

@@ -17,10 +17,11 @@
     justify-content: space-between;
     align-items: end;
     background: var(--transparent);
+    height: 250px;
   }
 
   header div {
-    padding: 100px 40px 10px 40px;
+    padding: 0 40px 10px 40px;
     color: var(--color);
     font-size: var(--size-6);
     font-family:
@@ -50,10 +51,20 @@
 
   header img {
     width: 220px;
-    padding: 50px 50px 0 50px;
+    padding: 0 50px;
   }
 
   @media only screen and (max-width: 900px) {
+    header {
+      height: 180px;
+      justify-content: center;
+      align-items: center;
+    }
+
+    header div {
+      padding: 30px 20px 20px 20px;
+    }
+
     header img {
       display: none;
     }