css
body {
    font-family: Arial, sans-serif;
    background-color: #f5f7fa;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    text-align: center;
    color: #333;
}

.contact-info {
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin-bottom: 50px;
}

.contact-info img {
    width: 150px;
    height: auto;
}

.contact-info div {
    max-width: 500px;
}

.contact-info address,
.contact-info p {
    font-size: 16px;
    line-height: 1.6;
    color: #555;
}

.contact-form {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.contact-form button {
    width: 100%;
    padding: 12px;
    background-color: #007BFF;
    border: none;
    color: #fff;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.contact-form button:hover {
    background-color: #0056b3;
}

.fade-out {
    animation: fadeOut 2s forwards;
}

@keyframes fadeOut {
    0% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        display: none;
    }
}



<div class="container">
    <h1>Contact Us</h1>
    <div class="contact-info">
        <img src="images/contact_office.webp" alt="Office building of VALTRYONEX">
        <div>
            <address>
                VALTRYONEX<br>
                767 Fifth Avenue, 44th Floor<br>
                New York, NY, 10153, US
            </address>
            <p>Phone: <a href="tel:2128124700">212-812-4700</a></p>
        </div>
    </div>
    <div class="contact-form" id="contact-form">
        <input type="text" id="name" placeholder="Your Name" required>
        <input type="email" id="email" placeholder="Your Email" required>
        <textarea id="message" placeholder="Your Message" rows="5" required></textarea>
        <button onclick="submitForm()">Send Message</button>
    </div>
    <div id="confirmation" style="display:none; text-align: center; margin-top: 20px;">
        <p>Thank you for contacting us! We'll get back to you soon.</p>
    </div>
</div>

<script>
function submitForm() {
    const form = document.getElementById('contact-form');
    const confirmation = document.getElementById('confirmation');

    form.classList.add('fade-out');
    setTimeout(() => {
        form.style.display = 'none';
        confirmation.style.display = 'block';
    }, 2000);
}
</script>