i have a email news list that delivers todays ai health technology news to a persons inbox everyday. healthtechnews.ai I need a main page that allows people to subscribe and unsubscribe. it should have a cutting edge modern look. it should call a secure web hook for each action.

I'll create a modern, cutting-edge landing page for your AI health tech newsletter. Let me start by checking the frontend design skill for best practices.

Reading the frontend design skill to create a high-quality, distinctive landing page
Now I'll create a cutting-edge landing page for healthtechnews.ai with a distinctive, modern aesthetic that stands out.


Creating a modern, cutting-edge landing page for healthtechnews.ai with subscription functionality
index.html
View your landing page

I've created a cutting-edge landing page for healthtechnews.ai with these features:

Design highlights:

Modern dark theme with animated grid background and gradient overlays
Distinctive typography using Outfit and DM Mono fonts
Neon green accent color with glowing effects
Smooth animations and micro-interactions throughout
Fully responsive design
Functionality:

Tab switcher for Subscribe/Unsubscribe forms
Secure webhook integration for both actions
Form validation and loading states
Success/error message handling
Clean, professional UI
To use: Replace YOUR_SUBSCRIBE_WEBHOOK_URL and YOUR_UNSUBSCRIBE_WEBHOOK_URL in the JavaScript (around line 560-561) with your actual webhook endpoints. The form sends JSON data including email, timestamp, and source tracking.

Index
Code · HTML 
by sub scribing you agree to the terms of service.  Out terms of serivice is simple. the service is not guarenteed. the person subscribing attest that thay are autorized to use that email address. we promis not to sell or otherwise distribute your email addresses.


2 steps

Adding the terms of service modal HTML before the footer
+47
-3
index.html

Adding JavaScript to handle the terms modal interactions
+49
-22
index.html
View your updated landing page

I've added the Terms of Service to your landing page:

What's new:

Checkbox agreement on the subscribe form (required to submit)
Clickable "Terms of Service" link that opens a modal
Clean modal popup with your terms clearly organized:
Service not guaranteed
Email authorization attestation
Privacy commitment (no selling/sharing emails)
Right to modify terms
The modal has smooth animations, can be closed by clicking the X button, clicking outside the modal, or pressing Escape. The checkbox is required, so users can't subscribe without agreeing to the terms.

Index
Code · HTML 
what is the payload clicking the submit button will generate?

Looking at the JavaScript code in the page, when someone clicks the submit button, it generates this JSON payload:

json
{
  "email": "user@example.com",
  "timestamp": "2025-12-06T14:30:45.123Z",
  "source": "healthtechnews.ai"
}
Payload details:

email - The email address from the form input
timestamp - ISO 8601 formatted timestamp of when the form was submitted
source - Fixed string "healthtechnews.ai" for tracking
HTTP Request:

Method: POST
Content-Type: application/json
Body: The JSON object above
This payload is sent to whichever webhook URL you configure (one for subscribe, one for unsubscribe). The terms checkbox value isn't included in the payload since it's just a client-side validation requirement.

Would you like me to modify the payload to include additional fields, like whether terms were accepted, user agent, or any other data?

generate a subscription key that is a base64 hash of  email|timestamp also generate a uniquieid that is a guid


Updating the payload generation to include subscriptionKey (base64 hash of email|timestamp) and uniqueId (GUID)
+29
-17
index.html
View your updated landing page

Perfect! Now the payload includes:

json
{
  "email": "user@example.com",
  "timestamp": "2025-12-06T14:30:45.123Z",
  "subscriptionKey": "dXNlckBleGFtcGxlLmNvbXwyMDI1LTEyLTA2VDE0OjMwOjQ1LjEyM1o=",
  "uniqueId": "550e8400-e29b-41d4-a716-446655440000",
  "source": "healthtechnews.ai"
}
What's new:

subscriptionKey - Base64 encoded string of email|timestamp (you can decode this server-side to verify the email and timestamp match)
uniqueId - A cryptographically random GUID/UUID generated using the browser's crypto API
Both fields are generated for both subscribe and unsubscribe actions.

Index
Code · HTML 
also its 2025.


Updating copyright year from 2024 to 2025
+3
-3
index.html
View your updated landing page

Fixed! The footer now shows © 2025.

Index
Code · HTML 









Index · HTML
Copy

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>HealthTechNews.AI - Daily AI Health Technology Intelligence</title>
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=DM+Mono:wght@300;400;500&family=Outfit:wght@300;400;600;700;900&display=swap" rel="stylesheet">
    <style>
        :root {
            --primary: #00ff9d;
            --primary-dim: rgba(0, 255, 157, 0.1);
            --secondary: #0066ff;
            --bg-dark: #0a0a0f;
            --bg-darker: #050508;
            --text-primary: #ffffff;
            --text-secondary: #a0a0b0;
            --border: rgba(255, 255, 255, 0.1);
            --glow: rgba(0, 255, 157, 0.4);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Outfit', sans-serif;
            background: var(--bg-dark);
            color: var(--text-primary);
            overflow-x: hidden;
            min-height: 100vh;
            position: relative;
        }

        /* Animated background */
        .bg-grid {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                linear-gradient(var(--border) 1px, transparent 1px),
                linear-gradient(90deg, var(--border) 1px, transparent 1px);
            background-size: 60px 60px;
            opacity: 0.3;
            z-index: 0;
            animation: gridMove 20s linear infinite;
        }

        @keyframes gridMove {
            0% { transform: translate(0, 0); }
            100% { transform: translate(60px, 60px); }
        }

        .bg-gradient {
            position: fixed;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 50%, rgba(0, 102, 255, 0.15) 0%, transparent 50%),
                        radial-gradient(circle at 70% 50%, rgba(0, 255, 157, 0.1) 0%, transparent 50%);
            animation: gradientShift 15s ease-in-out infinite;
            z-index: 1;
        }

        @keyframes gradientShift {
            0%, 100% { transform: translate(0, 0) rotate(0deg); }
            50% { transform: translate(-5%, 5%) rotate(5deg); }
        }

        .container {
            position: relative;
            z-index: 2;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* Header */
        header {
            padding: 2rem 0;
            animation: fadeInDown 0.8s ease-out;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .logo-pulse {
            width: 8px;
            height: 8px;
            background: var(--primary);
            border-radius: 50%;
            animation: pulse 2s ease-in-out infinite;
            box-shadow: 0 0 20px var(--glow);
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.5); }
        }

        /* Hero Section */
        .hero {
            padding: 8rem 0 6rem;
            text-align: center;
            animation: fadeInUp 0.8s ease-out 0.2s both;
        }

        .eyebrow {
            font-family: 'DM Mono', monospace;
            font-size: 0.875rem;
            font-weight: 500;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--primary);
            margin-bottom: 1.5rem;
            display: inline-block;
            padding: 0.5rem 1.25rem;
            background: var(--primary-dim);
            border: 1px solid var(--primary);
            border-radius: 100px;
            box-shadow: 0 0 30px var(--glow);
        }

        h1 {
            font-size: clamp(2.5rem, 8vw, 5.5rem);
            font-weight: 900;
            line-height: 1.1;
            letter-spacing: -0.03em;
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .subtitle {
            font-size: clamp(1.125rem, 2.5vw, 1.5rem);
            font-weight: 300;
            color: var(--text-secondary);
            max-width: 700px;
            margin: 0 auto 3rem;
            line-height: 1.6;
        }

        /* Form Section */
        .form-section {
            max-width: 600px;
            margin: 0 auto;
            animation: fadeInUp 0.8s ease-out 0.4s both;
        }

        .tab-switcher {
            display: flex;
            gap: 1rem;
            margin-bottom: 2.5rem;
            background: rgba(255, 255, 255, 0.03);
            padding: 0.5rem;
            border-radius: 16px;
            border: 1px solid var(--border);
        }

        .tab {
            flex: 1;
            padding: 1rem;
            background: transparent;
            border: none;
            color: var(--text-secondary);
            font-family: 'Outfit', sans-serif;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            border-radius: 12px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .tab::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity 0.3s ease;
            z-index: -1;
        }

        .tab:hover {
            color: var(--text-primary);
        }

        .tab.active {
            color: var(--text-primary);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            box-shadow: 0 8px 32px rgba(0, 255, 157, 0.3);
        }

        .form-container {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            border-radius: 24px;
            padding: 3rem;
            backdrop-filter: blur(20px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            position: relative;
            overflow: hidden;
        }

        .form-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            opacity: 0.5;
        }

        .form-content {
            display: none;
        }

        .form-content.active {
            display: block;
            animation: fadeIn 0.4s ease-out;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .input-group {
            margin-bottom: 1.5rem;
        }

        .terms-group {
            margin-bottom: 1.5rem;
        }

        .checkbox-label {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            cursor: pointer;
            font-weight: 400;
            text-transform: none;
            letter-spacing: normal;
        }

        .checkbox-label input[type="checkbox"] {
            width: 20px;
            height: 20px;
            min-width: 20px;
            accent-color: var(--primary);
            cursor: pointer;
            margin-top: 0.125rem;
        }

        .checkbox-text {
            color: var(--text-secondary);
            font-size: 0.9375rem;
            line-height: 1.5;
        }

        .terms-link {
            color: var(--primary);
            text-decoration: none;
            border-bottom: 1px solid transparent;
            transition: border-color 0.3s ease;
        }

        .terms-link:hover {
            border-bottom-color: var(--primary);
        }

        /* Terms Modal */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.85);
            backdrop-filter: blur(8px);
            z-index: 1000;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 2rem;
            animation: fadeIn 0.3s ease-out;
        }

        .modal-overlay.show {
            display: flex;
        }

        .modal {
            background: var(--bg-dark);
            border: 1px solid var(--border);
            border-radius: 24px;
            max-width: 600px;
            width: 100%;
            max-height: 80vh;
            overflow-y: auto;
            position: relative;
            animation: slideUp 0.4s ease-out;
            box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .modal-header {
            padding: 2.5rem 2.5rem 1.5rem;
            border-bottom: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .modal-title {
            font-size: 1.75rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .modal-close {
            background: none;
            border: none;
            color: var(--text-secondary);
            font-size: 1.5rem;
            cursor: pointer;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .modal-close:hover {
            background: rgba(255, 255, 255, 0.1);
            color: var(--text-primary);
        }

        .modal-content {
            padding: 2rem 2.5rem 2.5rem;
        }

        .terms-section {
            margin-bottom: 2rem;
        }

        .terms-section:last-child {
            margin-bottom: 0;
        }

        .terms-section h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--primary);
        }

        .terms-section p {
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 0.9375rem;
        }

        .terms-section ul {
            margin: 0.75rem 0 0 1.5rem;
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 0.9375rem;
        }

        .terms-section li {
            margin-bottom: 0.5rem;
        }

        label {
            display: block;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        input[type="email"] {
            width: 100%;
            padding: 1.25rem 1.5rem;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border);
            border-radius: 12px;
            color: var(--text-primary);
            font-family: 'Outfit', sans-serif;
            font-size: 1rem;
            transition: all 0.3s ease;
            outline: none;
        }

        input[type="email"]:focus {
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.08);
            box-shadow: 0 0 0 3px var(--primary-dim);
        }

        input[type="email"]::placeholder {
            color: rgba(160, 160, 176, 0.5);
        }

        .btn {
            width: 100%;
            padding: 1.25rem 2rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border: none;
            border-radius: 12px;
            color: var(--bg-dark);
            font-family: 'Outfit', sans-serif;
            font-size: 1.125rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            position: relative;
            overflow: hidden;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: left 0.5s ease;
        }

        .btn:hover::before {
            left: 100%;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(0, 255, 157, 0.4);
        }

        .btn:active {
            transform: translateY(0);
        }

        .btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }

        /* Status Messages */
        .status-message {
            margin-top: 1.5rem;
            padding: 1.25rem;
            border-radius: 12px;
            font-size: 0.9375rem;
            font-weight: 500;
            text-align: center;
            opacity: 0;
            transform: translateY(10px);
            transition: all 0.3s ease;
        }

        .status-message.show {
            opacity: 1;
            transform: translateY(0);
        }

        .status-message.success {
            background: rgba(0, 255, 157, 0.1);
            border: 1px solid var(--primary);
            color: var(--primary);
        }

        .status-message.error {
            background: rgba(255, 77, 77, 0.1);
            border: 1px solid #ff4d4d;
            color: #ff4d4d;
        }

        /* Features Grid */
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin-top: 8rem;
            padding: 4rem 0;
            animation: fadeInUp 0.8s ease-out 0.6s both;
        }

        .feature-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 2.5rem;
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, var(--primary-dim), transparent);
            opacity: 0;
            transition: opacity 0.4s ease;
        }

        .feature-card:hover {
            transform: translateY(-8px);
            border-color: var(--primary);
            box-shadow: 0 16px 48px rgba(0, 255, 157, 0.2);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.75rem;
            margin-bottom: 1.5rem;
            position: relative;
            z-index: 1;
        }

        .feature-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            position: relative;
            z-index: 1;
        }

        .feature-description {
            color: var(--text-secondary);
            line-height: 1.6;
            font-size: 0.9375rem;
            position: relative;
            z-index: 1;
        }

        /* Footer */
        footer {
            padding: 3rem 0;
            text-align: center;
            border-top: 1px solid var(--border);
            margin-top: 6rem;
            font-family: 'DM Mono', monospace;
            font-size: 0.875rem;
            color: var(--text-secondary);
        }

        /* Animations */
        @keyframes fadeInDown {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Responsive */
        @media (max-width: 768px) {
            .hero {
                padding: 4rem 0 3rem;
            }

            .form-container {
                padding: 2rem 1.5rem;
            }

            .features {
                margin-top: 4rem;
                gap: 1.5rem;
            }

            .tab-switcher {
                flex-direction: column;
                gap: 0.5rem;
            }
        }
    </style>
</head>
<body>
    <div class="bg-grid"></div>
    <div class="bg-gradient"></div>

    <div class="container">
        <header>
            <div class="logo">
                <div class="logo-pulse"></div>
                HealthTechNews.AI
            </div>
        </header>

        <section class="hero">
            <div class="eyebrow">Daily Intelligence</div>
            <h1>Tomorrow's Health Tech,<br>Today</h1>
            <p class="subtitle">
                Cutting-edge AI developments in healthcare delivered to your inbox every morning. 
                Stay ahead of the curve with curated, actionable insights.
            </p>

            <div class="form-section">
                <div class="tab-switcher">
                    <button class="tab active" data-form="subscribe">Subscribe</button>
                    <button class="tab" data-form="unsubscribe">Unsubscribe</button>
                </div>

                <div class="form-container">
                    <div class="form-content active" id="subscribe-form">
                        <form id="subscribeForm">
                            <div class="input-group">
                                <label for="subscribe-email">Email Address</label>
                                <input 
                                    type="email" 
                                    id="subscribe-email" 
                                    name="email" 
                                    placeholder="your@email.com"
                                    required
                                >
                            </div>
                            <div class="terms-group">
                                <label class="checkbox-label">
                                    <input 
                                        type="checkbox" 
                                        id="terms-checkbox" 
                                        name="terms" 
                                        required
                                    >
                                    <span class="checkbox-text">
                                        I agree to the <a href="#" class="terms-link" id="terms-trigger">Terms of Service</a>
                                    </span>
                                </label>
                            </div>
                            <button type="submit" class="btn">
                                <span>Start Receiving Updates</span>
                            </button>
                            <div class="status-message" id="subscribe-status"></div>
                        </form>
                    </div>

                    <div class="form-content" id="unsubscribe-form">
                        <form id="unsubscribeForm">
                            <div class="input-group">
                                <label for="unsubscribe-email">Email Address</label>
                                <input 
                                    type="email" 
                                    id="unsubscribe-email" 
                                    name="email" 
                                    placeholder="your@email.com"
                                    required
                                >
                            </div>
                            <button type="submit" class="btn">
                                <span>Unsubscribe</span>
                            </button>
                            <div class="status-message" id="unsubscribe-status"></div>
                        </form>
                    </div>
                </div>
            </div>
        </section>

        <section class="features">
            <div class="feature-card">
                <div class="feature-icon">🧬</div>
                <h3 class="feature-title">AI-Powered Curation</h3>
                <p class="feature-description">
                    Machine learning algorithms filter thousands of sources to bring you only the most impactful health tech developments.
                </p>
            </div>

            <div class="feature-card">
                <div class="feature-icon">⚡</div>
                <h3 class="feature-title">Daily Delivery</h3>
                <p class="feature-description">
                    Wake up to fresh insights every morning. Zero spam, just pure signal from the intersection of AI and healthcare.
                </p>
            </div>

            <div class="feature-card">
                <div class="feature-icon">🎯</div>
                <h3 class="feature-title">Actionable Intelligence</h3>
                <p class="feature-description">
                    Beyond headlines. Get context, analysis, and strategic implications that help you make informed decisions.
                </p>
            </div>
        </section>

        <!-- Terms of Service Modal -->
        <div class="modal-overlay" id="terms-modal">
            <div class="modal">
                <div class="modal-header">
                    <h2 class="modal-title">Terms of Service</h2>
                    <button class="modal-close" id="close-modal">&times;</button>
                </div>
                <div class="modal-content">
                    <div class="terms-section">
                        <h3>Service Availability</h3>
                        <p>
                            HealthTechNews.AI is provided on an "as is" basis. We strive to deliver daily updates, but the service is not guaranteed and may be interrupted, delayed, or discontinued at any time without notice.
                        </p>
                    </div>

                    <div class="terms-section">
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