Set logged-out profile icon to white

index.html

@@ -227,12 +227,21 @@
             <button
               id="loginButton"
               class="btn focus-ring h-12 w-12 rounded-full p-0"
+              aria-label="Open login modal"
             >
-              <img
-                src="assets/svg/default-profile.svg"
-                alt="Profile Icon"
-                class="h-9 w-9 rounded-full object-cover"
-              />
+              <svg
+                class="h-9 w-9"
+                viewBox="0 0 24 24"
+                role="presentation"
+                focusable="false"
+                aria-hidden="true"
+              >
+                <path
+                  d="M12 0C5.373 0 0 5.373 0 12s5.373 12 12 12 12-5.373 12-12S18.627 0 12 0Zm0 22c-3.123 0-5.914-1.441-7.749-3.69.259-.588.783-.995 1.867-1.246 2.244-.518 4.459-.981 3.393-2.945C6.356 8.299 8.612 5 12 5s4.366 3.177 1.489 9.119c-1.035 1.952 1.1 2.416 3.393 2.945 1.082.25 1.61.655 1.871 1.241C17.917 20.558 15.125 22 12 22Z"
+                  fill="currentColor"
+                  fill-rule="nonzero"
+                />
+              </svg>
             </button>
 
             <!-- Upload Button (hidden by default) -->