public function render_settings_page() {
    // Handle form submission
    if (isset($_POST['bbs_save_settings'])) {
        $options = array(
            // General Settings
            'business_label' => sanitize_text_field($_POST['business_label'] ?? 'GetGear Bookings'),
            'bays_count' => intval($_POST['bays_count'] ?? 3),
            'bay_price' => floatval($_POST['bay_price'] ?? 120),
            'booking_duration' => intval($_POST['booking_duration'] ?? 50),
            'max_advance_days' => intval($_POST['max_advance_days'] ?? 7),
            'payment_hold_minutes' => intval($_POST['payment_hold_minutes'] ?? 15),
            'dashboard_page_title' => sanitize_text_field($_POST['dashboard_page_title'] ?? 'My Range Bookings'),
            
            // Shooter & Group Settings
            'max_shooters_per_bay' => intval($_POST['max_shooters_per_bay'] ?? 2),
            'max_group_size' => intval($_POST['max_group_size'] ?? 6),
            'group_booking_rule' => sanitize_text_field($_POST['group_booking_rule'] ?? 'all_bays'),
            'allow_two_shooters_separate_bays' => isset($_POST['allow_two_shooters_separate_bays']) ? 1 : 0,
            
            // Yoco Settings
            'enable_payments' => isset($_POST['enable_payments']) ? 1 : 0,
            'test_mode' => isset($_POST['test_mode']) ? 1 : 0,
            'yoco_public_key' => sanitize_text_field($_POST['yoco_public_key'] ?? ''),
            'yoco_secret_key' => sanitize_text_field($_POST['yoco_secret_key'] ?? ''),
            
            // Branding Settings
            'booking_header_badge_text' => sanitize_text_field($_POST['booking_header_badge_text'] ?? 'GetGear Bookings'),
            'booking_header_title' => sanitize_text_field($_POST['booking_header_title'] ?? 'Book your range time with GetGear'),
            'booking_header_subtitle' => sanitize_textarea_field($_POST['booking_header_subtitle'] ?? 'Choose your date, time, and bay. One booking reserves one full bay for your group.'),
            'brand_primary_color' => sanitize_hex_color($_POST['brand_primary_color'] ?? '#111827'),
            'brand_primary_end_color' => sanitize_hex_color($_POST['brand_primary_end_color'] ?? '#1f2937'),
            'brand_accent_color' => sanitize_hex_color($_POST['brand_accent_color'] ?? '#f59e0b'),
            'booking_header_title_color' => sanitize_hex_color($_POST['booking_header_title_color'] ?? '#ffffff'),
            'booking_header_subtitle_color' => sanitize_hex_color($_POST['booking_header_subtitle_color'] ?? '#ffffff'),
            'booking_header_badge_text_color' => sanitize_hex_color($_POST['booking_header_badge_text_color'] ?? '#ffffff'),
            'booking_header_badge_bg_color' => sanitize_hex_color($_POST['booking_header_badge_bg_color'] ?? '#334155'),
            
            // Flow Text Settings
            'hub_calendar_title' => sanitize_text_field($_POST['hub_calendar_title'] ?? 'Pick a date'),
            'hub_calendar_help' => sanitize_textarea_field($_POST['hub_calendar_help'] ?? 'Choose an open day first.'),
            'hub_flow_time_title' => sanitize_text_field($_POST['hub_flow_time_title'] ?? 'Choose a time'),
            'hub_flow_bay_title' => sanitize_text_field($_POST['hub_flow_bay_title'] ?? 'Choose your bay'),
            'form_intro_title' => sanitize_text_field($_POST['form_intro_title'] ?? 'Finish your booking'),
            'form_intro_help' => sanitize_textarea_field($_POST['form_intro_help'] ?? 'Your date, time, and bay are already selected.'),
            'rental_group_step_title' => sanitize_text_field($_POST['rental_group_step_title'] ?? 'Choose rental option and group size'),
            'rental_selected_step_title' => sanitize_text_field($_POST['rental_selected_step_title'] ?? 'Rental selected and group size'),
            'rental_group_help' => sanitize_textarea_field($_POST['rental_group_help'] ?? 'Choose your rental option first.'),
            'own_firearm_title' => sanitize_text_field($_POST['own_firearm_title'] ?? 'Bring own firearm'),
            'rent_firearm_title' => sanitize_text_field($_POST['rent_firearm_title'] ?? 'Use a GetGear rental'),
            'group_size_title' => sanitize_text_field($_POST['group_size_title'] ?? 'How many shooters are coming?'),
            'details_title' => sanitize_text_field($_POST['details_title'] ?? 'Fill in your details'),
            'age_warning_text' => sanitize_textarea_field($_POST['age_warning_text'] ?? 'You must be 21+ years old and have valid ID.'),
            'review_button_text' => sanitize_text_field($_POST['review_button_text'] ?? 'Next: Review Booking'),
            'review_help_text' => sanitize_textarea_field($_POST['review_help_text'] ?? 'Check your booking summary below.'),
            'summary_title' => sanitize_text_field($_POST['summary_title'] ?? 'Booking Summary'),
            'pay_button_text' => sanitize_text_field($_POST['pay_button_text'] ?? 'Pay'),
            
            // Telegram Settings
            'telegram_disable_all' => isset($_POST['telegram_disable_all']) ? 1 : 0,
            'telegram_notifications_enabled' => isset($_POST['telegram_notifications_enabled']) ? 1 : 0,
            'telegram_bot_token' => sanitize_text_field($_POST['telegram_bot_token'] ?? ''),
            'telegram_chat_id' => sanitize_text_field($_POST['telegram_chat_id'] ?? ''),
            'telegram_interactive_enabled' => isset($_POST['telegram_interactive_enabled']) ? 1 : 0,
            'telegram_allowed_user_ids' => sanitize_textarea_field($_POST['telegram_allowed_user_ids'] ?? ''),
            'telegram_poll_interval' => intval($_POST['telegram_poll_interval'] ?? 5),
            'telegram_notify_new_booking' => isset($_POST['telegram_notify_new_booking']) ? 1 : 0,
            'telegram_notify_payment_paid' => isset($_POST['telegram_notify_payment_paid']) ? 1 : 0,
            'telegram_notify_status_changes' => isset($_POST['telegram_notify_status_changes']) ? 1 : 0,
            'telegram_notify_events' => isset($_POST['telegram_notify_events']) ? 1 : 0,
            
            // Discord Settings
            'discord_alerts_enabled' => isset($_POST['discord_alerts_enabled']) ? 1 : 0,
            'discord_webhook_url' => esc_url_raw($_POST['discord_webhook_url'] ?? ''),
            'discord_bot_api_enabled' => isset($_POST['discord_bot_api_enabled']) ? 1 : 0,
            'discord_bot_api_key' => sanitize_text_field($_POST['discord_bot_api_key'] ?? ''),
            'discord_notify_new_booking' => isset($_POST['discord_notify_new_booking']) ? 1 : 0,
            'discord_notify_payment_paid' => isset($_POST['discord_notify_payment_paid']) ? 1 : 0,
            'discord_notify_status_changes' => isset($_POST['discord_notify_status_changes']) ? 1 : 0,
            'discord_notify_events' => isset($_POST['discord_notify_events']) ? 1 : 0,
        );
        
        // Save flow text defaults
        foreach (self::flow_text_defaults() as $key => $config) {
            if (isset($_POST[$key])) {
                $options[$key] = $config['type'] === 'textarea' 
                    ? sanitize_textarea_field($_POST[$key]) 
                    : sanitize_text_field($_POST[$key]);
            }
        }
        
        update_option('bbs_payment_options', $options);
        echo '<div class="notice notice-success is-dismissible"><p>Settings saved successfully!</p></div>';
    }
    
    $settings = get_option('bbs_payment_options', array());
    ?>
    <div class="wrap bbs-admin-panel">
        <div class="bbs-page-header">
            <div>
                <span class="bbs-kicker">Configuration</span>
                <h1>GetGear Bookings Settings</h1>
                <p>Configure every aspect of your booking system.</p>
            </div>
        </div>

        <form method="post" action="">
            <div class="bbs-grid-2">
                <!-- LEFT COLUMN - Main Settings -->
                <div>
                    <!-- General Settings -->
                    <div class="bbs-panel-card">
                        <h3>General Settings</h3>
                        <table class="form-table">
                            <tr>
                                <th><label for="business_label">Admin Menu Label</label></th>
                                <td><input type="text" name="business_label" id="business_label" value="GetGear Bookings" class="regular-text"><p class="description">Name shown in WordPress admin menu.</p></td>
                            </tr>
                            <tr>
                                <th><label for="bays_count">Total Bays</label></th>
                                <td><input type="number" name="bays_count" id="bays_count" value="3" min="1" max="20" class="small-text"><p class="description">Number of shooting bays available.</p></td>
                            </tr>
                            <tr>
                                <th><label for="bay_price">Price Per Person (R)</label></th>
                                <td><input type="number" name="bay_price" id="bay_price" value="120" step="0.01" min="0" class="small-text"><p class="description">Base price per shooter.</p></td>
                            </tr>
                            <tr>
                                <th><label for="booking_duration">Booking Duration (minutes)</label></th>
                                <td><input type="number" name="booking_duration" id="booking_duration" value="50" min="15" max="180" class="small-text"></td>
                            </tr>
                            <tr>
                                <th><label for="max_advance_days">Max Advance Booking (Days)</label></th>
                                <td><input type="number" name="max_advance_days" id="max_advance_days" value="7" min="1" max="90" class="small-text"></td>
                            </tr>
                            <tr>
                                <th><label for="payment_hold_minutes">Payment Hold Time (minutes)</label></th>
                                <td><input type="number" name="payment_hold_minutes" id="payment_hold_minutes" value="15" min="5" max="180" class="small-text"><p class="description">How long a pending booking holds the bay.</p></td>
                            </tr>
                            <tr>
                                <th><label for="dashboard_page_title">Customer Dashboard Title</label></th>
                                <td><input type="text" name="dashboard_page_title" id="dashboard_page_title" value="My Range Bookings" class="regular-text"></td>
                            </tr>
                        </table>
                    </div>

                    <!-- Shooter & Group Settings -->
                    <div class="bbs-panel-card">
                        <h3>Shooter & Group Settings</h3>
                        <table class="form-table">
                            <tr>
                                <th><label for="max_shooters_per_bay">Max Shooters Per Bay</label></th>
                                <td><input type="number" name="max_shooters_per_bay" id="max_shooters_per_bay" value="2" min="1" max="10" class="small-text"></td>
                            </tr>
                            <tr>
                                <th><label for="max_group_size">Maximum Group Size</label></th>
                                <td><input type="number" name="max_group_size" id="max_group_size" value="6" min="3" max="20" class="small-text"></td>
                            </tr>
                            <tr>
                                <th><label for="group_booking_rule">Group Booking Rule</label></th>
                                <td>
                                    <select name="group_booking_rule" id="group_booking_rule">
                                        <option value="all_bays"  selected='selected'>3+ shooters reserve ALL bays</option>
                                        <option value="needed_bays" >3+ shooters reserve only NEEDED bays</option>
                                    </select>
                                </td>
                            </tr>
                            <tr>
                                <th><label for="allow_two_shooters_separate_bays">Allow 2 Shooters Separate Bays</label></th>
                                <td><label><input type="checkbox" name="allow_two_shooters_separate_bays" id="allow_two_shooters_separate_bays" value="1"  checked='checked'> Allow 2 shooters to reserve 2 separate bays</label></td>
                            </tr>
                        </table>
                    </div>

                    <!-- Yoco Payment Settings -->
                    <div class="bbs-panel-card">
                        <h3>Yoco Payment Gateway</h3>
                        <table class="form-table">
                            <tr>
                                <th><label for="enable_payments">Enable Payments</label></th>
                                <td><label><input type="checkbox" name="enable_payments" id="enable_payments" value="1"  checked='checked'> Enable online payments via Yoco</label></td>
                            </tr>
                            <tr>
                                <th><label for="test_mode">Test Mode</label></th>
                                <td><label><input type="checkbox" name="test_mode" id="test_mode" value="1"  checked='checked'> Use test mode (for testing payments)</label></td>
                            </tr>
                            <tr>
                                <th><label for="yoco_public_key">Yoco Public Key</label></th>
                                <td><input type="text" name="yoco_public_key" id="yoco_public_key" value="" class="regular-text"></td>
                            </tr>
                            <tr>
                                <th><label for="yoco_secret_key">Yoco Secret Key</label></th>
                                <td><input type="password" name="yoco_secret_key" id="yoco_secret_key" value="" class="regular-text"><p class="description">Your Yoco secret API key. Keep this private.</p></td>
                            </tr>
                        </table>
                    </div>

                    <!-- Frontend Branding Settings -->
                    <div class="bbs-panel-card">
                        <h3>Frontend Branding</h3>
                        <table class="form-table">
                            <tr>
                                <th><label for="booking_header_badge_text">Header Badge Text</label></th>
                                <td><input type="text" name="booking_header_badge_text" id="booking_header_badge_text" value="GetGear Bookings" class="regular-text"></td>
                            </tr>
                            <tr>
                                <th><label for="booking_header_title">Booking Page Title</label></th>
                                <td><input type="text" name="booking_header_title" id="booking_header_title" value="Book your range time with GetGear" class="regular-text"></td>
                            </tr>
                            <tr>
                                <th><label for="booking_header_subtitle">Booking Page Subtitle</label></th>
                                <td><textarea name="booking_header_subtitle" id="booking_header_subtitle" rows="2" class="large-text">Choose your date, time, and bay. One booking reserves one full bay for your group.</textarea></td>
                            </tr>
                            <tr>
                                <th><label for="brand_primary_color">Primary Color</label></th>
                                <td><input type="color" name="brand_primary_color" id="brand_primary_color" value="#111827"><p class="description">Header background start color.</p></td>
                            </tr>
                            <tr>
                                <th><label for="brand_primary_end_color">Primary End Color</label></th>
                                <td><input type="color" name="brand_primary_end_color" id="brand_primary_end_color" value="#1f2937"><p class="description">Header background end color.</p></td>
                            </tr>
                            <tr>
                                <th><label for="brand_accent_color">Accent Color</label></th>
                                <td><input type="color" name="brand_accent_color" id="brand_accent_color" value="#f59e0b"><p class="description">Button and highlight color.</p></td>
                            </tr>
                            <tr>
                                <th><label for="booking_header_title_color">Title Color</label></th>
                                <td><input type="color" name="booking_header_title_color" id="booking_header_title_color" value="#ffffff"></td>
                            </tr>
                            <tr>
                                <th><label for="booking_header_badge_text_color">Badge Text Color</label></th>
                                <td><input type="color" name="booking_header_badge_text_color" id="booking_header_badge_text_color" value="#ffffff"></td>
                            </tr>
                            <tr>
                                <th><label for="booking_header_badge_bg_color">Badge Background Color</label></th>
                                <td><input type="color" name="booking_header_badge_bg_color" id="booking_header_badge_bg_color" value="#334155"></td>
                            </tr>
                        </table>
                    </div>
                </div>

                <!-- RIGHT COLUMN -->
                <div>
                    <!-- Flow Text Settings -->
                    <div class="bbs-panel-card">
                        <h3>Booking Flow Text</h3>
                        <p>Customize the text shown to customers during booking.</p>
                        <table class="form-table">
                            <tr>
                                <th><label for="hub_calendar_title">Calendar Title</label></th>
                                <td><input type="text" name="hub_calendar_title" id="hub_calendar_title" value="Pick a date" class="regular-text"></td>
                            </tr>
                            <tr>
                                <th><label for="hub_flow_time_title">Time Selection Title</label></th>
                                <td><input type="text" name="hub_flow_time_title" id="hub_flow_time_title" value="Choose a time" class="regular-text"></td>
                            </tr>
                            <tr>
                                <th><label for="rental_group_step_title">Rental Step Title</label></th>
                                <td><input type="text" name="rental_group_step_title" id="rental_group_step_title" value="Choose rental option and group size" class="regular-text"></td>
                            </tr>
                            <tr>
                                <th><label for="own_firearm_title">Own Firearm Label</label></th>
                                <td><input type="text" name="own_firearm_title" id="own_firearm_title" value="Bring own firearm" class="regular-text"></td>
                            </tr>
                            <tr>
                                <th><label for="rent_firearm_title">Rental Firearm Label</label></th>
                                <td><input type="text" name="rent_firearm_title" id="rent_firearm_title" value="Use a GetGear rental" class="regular-text"></td>
                            </tr>
                            <tr>
                                <th><label for="group_size_title">Group Size Title</label></th>
                                <td><input type="text" name="group_size_title" id="group_size_title" value="How many shooters are coming?" class="regular-text"></td>
                            </tr>
                            <tr>
                                <th><label for="details_title">Customer Details Title</label></th>
                                <td><input type="text" name="details_title" id="details_title" value="Fill in your details" class="regular-text"></td>
                            </tr>
                            <tr>
                                <th><label for="summary_title">Summary Title</label></th>
                                <td><input type="text" name="summary_title" id="summary_title" value="Booking Summary" class="regular-text"></td>
                            </tr>
                            <tr>
                                <th><label for="pay_button_text">Pay Button Text</label></th>
                                <td><input type="text" name="pay_button_text" id="pay_button_text" value="Pay" class="regular-text"></td>
                            </tr>
                            <tr>
                                <th><label for="age_warning_text">Age Warning Text</label></th>
                                <td><textarea name="age_warning_text" id="age_warning_text" rows="2" class="large-text">You must be 21+ years old and have valid ID. Safety briefing required before shooting.</textarea></td>
                            </tr>
                        </table>
                    </div>

                    <!-- Telegram Settings -->
                    <div class="bbs-panel-card">
                        <h3>Telegram Bot Notifications</h3>
                        <p>Send booking alerts to your Telegram admin group.</p>
                        <table class="form-table">
                            <tr>
                                <th><label for="telegram_disable_all">Disable Telegram</label></th>
                                <td><label><input type="checkbox" name="telegram_disable_all" id="telegram_disable_all" value="1" > Completely disable Telegram features</label></td>
                            </tr>
                            <tr>
                                <th><label for="telegram_notifications_enabled">Enable Alerts</label></th>
                                <td><label><input type="checkbox" name="telegram_notifications_enabled" id="telegram_notifications_enabled" value="1" > Send Telegram alerts</label></td>
                            </tr>
                            <tr>
                                <th><label for="telegram_bot_token">Bot Token</label></th>
                                <td><input type="text" name="telegram_bot_token" id="telegram_bot_token" value="" class="regular-text"><p class="description">Token from BotFather</p></td>
                            </tr>
                            <tr>
                                <th><label for="telegram_chat_id">Group Chat ID</label></th>
                                <td><input type="text" name="telegram_chat_id" id="telegram_chat_id" value="" class="regular-text" placeholder="-1001234567890"></td>
                            </tr>
                            <tr>
                                <th><label for="telegram_interactive_enabled">Interactive Commands</label></th>
                                <td><label><input type="checkbox" name="telegram_interactive_enabled" id="telegram_interactive_enabled" value="1" > Enable /availability and /newbooking commands</label></td>
                            </tr>
                            <tr>
                                <th><label for="telegram_allowed_user_ids">Allowed User IDs</label></th>
                                <td><textarea name="telegram_allowed_user_ids" id="telegram_allowed_user_ids" rows="2" class="large-text"></textarea><p class="description">Comma or line separated Telegram user IDs</p></td>
                            </tr>
                            <tr>
                                <th><label for="telegram_notify_new_booking">Notify New Bookings</label></th>
                                <td><label><input type="checkbox" name="telegram_notify_new_booking" id="telegram_notify_new_booking" value="1"  checked='checked'> Send alert when a booking is created</label></td>
                            </tr>
                            <tr>
                                <th><label for="telegram_notify_payment_paid">Notify Payment Confirmed</label></th>
                                <td><label><input type="checkbox" name="telegram_notify_payment_paid" id="telegram_notify_payment_paid" value="1"  checked='checked'> Send alert when payment is confirmed</label></td>
                            </tr>
                        </table>
                    </div>

                    <!-- Discord Settings -->
                    <div class="bbs-panel-card">
                        <h3>Discord Bot & Alerts</h3>
                        <p>Send booking alerts to your Discord channel.</p>
                        <table class="form-table">
                            <tr>
                                <th><label for="discord_alerts_enabled">Enable Discord Alerts</label></th>
                                <td><label><input type="checkbox" name="discord_alerts_enabled" id="discord_alerts_enabled" value="1" > Send alerts to Discord webhook</label></td>
                            </tr>
                            <tr>
                                <th><label for="discord_webhook_url">Webhook URL</label></th>
                                <td><input type="url" name="discord_webhook_url" id="discord_webhook_url" value="" class="large-text" placeholder="https://discord.com/api/webhooks/..."></td>
                            </tr>
                            <tr>
                                <th><label for="discord_bot_api_enabled">Enable Bot API</label></th>
                                <td><label><input type="checkbox" name="discord_bot_api_enabled" id="discord_bot_api_enabled" value="1" > Allow external Discord bot to call API</label></td>
                            </tr>
                            <tr>
                                <th><label for="discord_bot_api_key">API Key</label></th>
                                <td><input type="text" name="discord_bot_api_key" id="discord_bot_api_key" value="" class="regular-text"><p class="description">Key for external bot to authenticate</p></td>
                            </tr>
                            <tr>
                                <th><label for="discord_notify_new_booking">Notify New Bookings</label></th>
                                <td><label><input type="checkbox" name="discord_notify_new_booking" id="discord_notify_new_booking" value="1"  checked='checked'> Send Discord alert on new booking</label></td>
                            </tr>
                            <tr>
                                <th><label for="discord_notify_payment_paid">Notify Payment Confirmed</label></th>
                                <td><label><input type="checkbox" name="discord_notify_payment_paid" id="discord_notify_payment_paid" value="1"  checked='checked'> Send Discord alert on payment</label></td>
                            </tr>
                        </table>
                    </div>
                </div>
            </div>

            <div style="margin-top: 20px; text-align: center;">
                <br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function submit_button() in /home/getgearc/gunshop.getgear.co.za/wp-content/plugins/better-booking-system/includes/class-payment-settings.php:365
Stack trace:
#0 /home/getgearc/gunshop.getgear.co.za/wp-content/plugins/better-booking-system/better-booking.php(31): require_once()
#1 /home/getgearc/gunshop.getgear.co.za/wp-settings.php(560): include_once('/home/getgearc/...')
#2 /home/getgearc/gunshop.getgear.co.za/wp-config.php(76): require_once('/home/getgearc/...')
#3 /home/getgearc/gunshop.getgear.co.za/wp-load.php(50): require_once('/home/getgearc/...')
#4 /home/getgearc/gunshop.getgear.co.za/wp-blog-header.php(13): require_once('/home/getgearc/...')
#5 /home/getgearc/gunshop.getgear.co.za/index.php(17): require('/home/getgearc/...')
#6 {main}
  thrown in <b>/home/getgearc/gunshop.getgear.co.za/wp-content/plugins/better-booking-system/includes/class-payment-settings.php</b> on line <b>365</b><br />