feat: Secure SMS verification with Redis (Predis)

- Added Predis library for Redis connection (no PHP extension required)
- Server-side SMS code generation and storage in Redis
- Rate limiting and brute-force protection
- Integration with n8n webhook for SMS sending
- Environment variables moved to .env file
- Fixed policy verification endpoint
- Added file-based fallback if Redis unavailable

old/css/custom.css

@@ -0,0 +1,62 @@
+form {
+    width: 700px;
+    margin: 0 auto;
+    padding: 40px 0;
+}
+
+fieldset {
+    border: 1px solid #d1d1d1;
+    padding: 20px;
+    border-radius: 3px;
+}
+
+[haserror="yes"] {
+    border: 2px solid tomato !important;
+}
+
+fieldset.constant {
+    display: none;
+}
+
+fieldset.hidden {
+    display: none;
+}
+
+.sum_removing {
+    display: none;
+}
+
+.error-message {
+    color: tomato;
+}
+
+.claim_additional {
+    display: none;
+}
+
+#tour-product,
+#tour-accomodation,
+#tour-transportation,
+#tour-other {
+    display: none;
+}
+
+.autocomplete {
+    padding: 10px 10px 10px 10px;
+    border: 1px solid #f3f3f3;
+    display: none;
+}
+
+.autocomplete.active {
+    display: block;
+}
+
+.autocomplete__item {
+    padding: 2px;
+    font-weight: 400;
+}
+
+.autocomplete__item:hover {
+    cursor: pointer;
+    background-color: #f3f3f3;
+}