Add Login.css and wire up styles

Author: Uttam Singh

frontend/src/pages/Login.css

@@ -0,0 +1,15 @@
+/* Login page styling */
+body { background-color: #f5f9ff; font-family: "Segoe UI", Arial, sans-serif; }
+.login-card {
+  background: #fff; padding: 30px; border-radius: 12px;
+  box-shadow: 0 2px 10px rgba(0,0,0,0.08); width: 320px; text-align: center;
+}
+.login-input {
+  width: 100%; padding: 10px; margin-bottom: 14px;
+  border: 1px solid #d9d9d9; border-radius: 8px;
+}
+.login-button {
+  width: 100%; padding: 10px; border: 0; border-radius: 8px;
+  background:#0047AB; color:#fff; cursor:pointer;
+}
+.login-button:hover { background:#003580; }