Implement Turnstile captcha for petition signing and add tweet prompt modal

Frontend/style.css

@@ -332,3 +332,121 @@ body {
         width: 100%;
     }
 }
+
+/* Tweet Modal Styles */
+.modal {
+    display: none;
+    position: fixed;
+    z-index: 1000;
+    left: 0;
+    top: 0;
+    width: 100%;
+    height: 100%;
+    background-color: rgba(0, 0, 0, 0.5);
+    animation: fadeIn 0.3s ease;
+}
+
+.modal.show {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+}
+
+.modal-content {
+    background-color: white;
+    padding: 40px;
+    border-radius: 12px;
+    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
+    max-width: 500px;
+    width: 90%;
+    position: relative;
+    animation: slideIn 0.3s ease;
+}
+
+.close-modal {
+    position: absolute;
+    top: 15px;
+    right: 20px;
+    font-size: 28px;
+    font-weight: bold;
+    color: #999;
+    cursor: pointer;
+    transition: color 0.3s ease;
+}
+
+.close-modal:hover {
+    color: #333;
+}
+
+.modal-content h2 {
+    font-size: 24px;
+    color: #222;
+    margin-bottom: 15px;
+}
+
+.modal-content p {
+    font-size: 16px;
+    color: #666;
+    margin-bottom: 25px;
+    line-height: 1.6;
+}
+
+.modal-buttons {
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
+    align-items: center;
+    width: 100%;
+}
+
+.modal-buttons button {
+    width: 100%;
+    max-width: 300px;
+    justify-content: center;
+}
+
+.modal-buttons .btn-primary {
+    background-color: #1DA1F2;
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
+
+.modal-buttons .btn-primary:hover {
+    background-color: #1a91da;
+}
+
+.modal-buttons .btn-primary i {
+    font-size: 18px;
+}
+
+@keyframes fadeIn {
+    from {
+        opacity: 0;
+    }
+    to {
+        opacity: 1;
+    }
+}
+
+@keyframes slideIn {
+    from {
+        transform: translateY(-50px);
+        opacity: 0;
+    }
+    to {
+        transform: translateY(0);
+        opacity: 1;
+    }
+}
+
+@media (max-width: 768px) {
+    .modal-content {
+        padding: 30px 20px;
+        max-width: 90%;
+    }
+
+    .modal-content h2 {
+        font-size: 20px;
+    }
+}