style: use full login screen palette for icon

images/user_icon.svg

@@ -1,7 +1,14 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" role="img" aria-label="Zaloguj do serwera poczty">
-  <rect x="2" y="2" width="20" height="20" rx="5" fill="#00689c"/>
-  <path d="M5 8.25a2 2 0 0 1 2-2h10a2 2 0 0 1 2 2v7.5a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2z" fill="#2c8ec4"/>
-  <path d="M6.5 8.5 12 12.35 17.5 8.5" fill="none" stroke="#ffffff" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"/>
-  <path d="M7 16h10" fill="none" stroke="#ffffff" stroke-width="1.5" stroke-linecap="round" opacity=".75"/>
-  <path d="M15.5 12h4.25m-1.55-1.55L19.75 12l-1.55 1.55" fill="none" stroke="#ff8a2a" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+  <defs>
+    <linearGradient id="mxLoginGradient" x1="2" y1="2" x2="22" y2="22" gradientUnits="userSpaceOnUse">
+      <stop offset="0" stop-color="#6670d6"/>
+      <stop offset=".52" stop-color="#4f96c8"/>
+      <stop offset="1" stop-color="#2ec4b6"/>
+    </linearGradient>
+  </defs>
+  <rect x="2" y="2" width="20" height="20" rx="5" fill="url(#mxLoginGradient)"/>
+  <path d="M5 8.25a2 2 0 0 1 2-2h9.25a2 2 0 0 1 2 2v7.5a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2z" fill="#ffffff"/>
+  <path d="M6.4 8.85 11.65 12.35 16.9 8.85" fill="none" stroke="#2f95c8" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M7.25 15.55h7.4" fill="none" stroke="#2f95c8" stroke-width="1.35" stroke-linecap="round" opacity=".55"/>
+  <path d="M14.75 12h4.8m-1.7-1.7 1.7 1.7-1.7 1.7" fill="none" stroke="#ff8a00" stroke-width="2.1" stroke-linecap="round" stroke-linejoin="round"/>
 </svg>