navbar fixes

src/components/Button.svelte

@@ -1,8 +1,10 @@
 <script>
+  // Handler and presentation props
   export let onClick = () => {};
+  export let border = false;
 </script>
 
-<button onclick={onClick} class="btn">
+<button onclick={onClick} class="btn" class:borderless={!border} {...$$restProps}>
   <slot />
 </button>
 
@@ -12,15 +14,18 @@
     color: var(--black);
     border-radius: 8px;
     border: 1.5px solid transparent;
-    border-color: var(--orange);
     padding: 0.6em 1.2em;
     font-weight: 500;
     cursor: pointer;
     display: flex;
     align-items: center;
-    justify-content: center;
     gap: 0.5em;
   }
+
+  .btn:not(.borderless) {
+    border-color: var(--orange);
+  }
+
   .btn:hover {
     background: var(--orange);
   }