Improve subscription UI with large tier buttons

- Replace dropdown tier selection with attractive visual buttons
- Add tier-button CSS with hover effects and selection states
- Remove 'or pay by card' divider from subscription form for cleaner UI
- Update JavaScript to handle tier button selection events
- Fix Stripe module import conflict by renaming stripe directory to stripe_config
- Add responsive grid layout for tier buttons on mobile devices

static/css/styles.css

@@ -842,3 +842,169 @@ button {
   cursor: pointer;
 }
 #result { margin-top: 12px; min-height: 20px; }
+
+/* Payment Type Tabs */
+.payment-type-tabs {
+  display: flex;
+  margin-bottom: 24px;
+  border-radius: 12px;
+  overflow: hidden;
+  border: 1px solid var(--border-color);
+}
+
+.tab-button {
+  flex: 1;
+  padding: 12px 16px;
+  border: none;
+  background: var(--bg-secondary);
+  color: var(--text-secondary);
+  cursor: pointer;
+  font-size: 14px;
+  font-weight: 500;
+  transition: all 0.2s ease;
+}
+
+.tab-button.active {
+  background: var(--accent);
+  color: white;
+}
+
+.tab-button:hover:not(.active) {
+  background: var(--border-color);
+  color: var(--text-primary);
+}
+
+/* Payment Forms */
+.payment-form {
+  display: none;
+}
+
+.payment-form.active {
+  display: block;
+}
+
+/* Subscription specific styles */
+#subscription-form select {
+  margin-bottom: 16px;
+}
+
+#subscription-form input[type="email"] {
+  margin-bottom: 16px;
+}
+
+/* Subscription result styling */
+#subscription-result {
+  margin-top: 16px;
+  padding: 12px;
+  border-radius: 8px;
+  font-weight: 500;
+}
+
+/* Tier Button Styling */
+.tier-buttons {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+  gap: 16px;
+  margin: 20px 0;
+}
+
+.tier-button {
+  background: var(--bg-secondary);
+  border: 2px solid var(--border-color);
+  border-radius: 16px;
+  padding: 24px 20px;
+  text-align: center;
+  cursor: pointer;
+  transition: all 0.3s ease;
+  position: relative;
+  overflow: hidden;
+}
+
+.tier-button:hover {
+  border-color: var(--accent);
+  background: var(--bg-input);
+  transform: translateY(-2px);
+  box-shadow: 0 8px 25px var(--shadow);
+}
+
+.tier-button.selected {
+  border-color: var(--accent);
+  background: var(--accent);
+  color: white;
+  transform: translateY(-2px);
+  box-shadow: 0 8px 25px var(--shadow);
+}
+
+.tier-button.selected .tier-description {
+  color: rgba(255, 255, 255, 0.9);
+}
+
+.tier-icon {
+  font-size: 32px;
+  margin-bottom: 8px;
+}
+
+.tier-name {
+  font-size: 20px;
+  font-weight: 600;
+  margin-bottom: 4px;
+  color: var(--text-primary);
+}
+
+.tier-button.selected .tier-name {
+  color: white;
+}
+
+.tier-price {
+  font-size: 24px;
+  font-weight: 700;
+  margin-bottom: 8px;
+  color: var(--accent);
+}
+
+.tier-button.selected .tier-price {
+  color: white;
+}
+
+.tier-period {
+  font-size: 14px;
+  font-weight: 400;
+  opacity: 0.8;
+}
+
+.tier-description {
+  font-size: 12px;
+  color: var(--text-secondary);
+  line-height: 1.4;
+  margin-top: 8px;
+}
+
+/* Mobile responsive */
+@media (max-width: 768px) {
+  .tier-buttons {
+    grid-template-columns: 1fr 1fr;
+    gap: 12px;
+  }
+  
+  .tier-button {
+    padding: 20px 16px;
+  }
+  
+  .tier-icon {
+    font-size: 28px;
+  }
+  
+  .tier-name {
+    font-size: 18px;
+  }
+  
+  .tier-price {
+    font-size: 20px;
+  }
+}
+
+@media (max-width: 480px) {
+  .tier-buttons {
+    grid-template-columns: 1fr;
+  }
+}