JSFiddle - React, Tailwind, and code Playground

HTML

<div id="request_info_layer_wrapper">
    <div id="request_info_layer" class="content_wrapper">
        <input type="button" id="request_info_layer_button" onclick="showForm()" value="REQUEST INFORMATION" />
    </div>
</div>
<div id="request_info_form_layer_wrapper">
    <div id="request_info_form_wrapper">
        <form name="request_info" id="request_info_form" action="/somepage" method="post">
            <h3>Name</h3>
            <input type="text" id="name_input" /><br />
            <p>Preferred method of contact</p>
            <h3>Email</h3>
            <input type="text" id="email_input" /><br /><br />
            <h3>Phone</h3>
            <input type="text" id="phone_input" /><br /><br />
            <p>Thanks for your interest in our program. We'll only use your contact information to send additional materials to help you understand the program better.</p>
            <input type="submit" id="submit_button" value="SUBMIT" />
        </form>
    </div>
</div>

CSS

.content_wrapper {
    position: relative;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}
#request_info_layer_wrapper {
    width: 100%;
    border-bottom: solid 3px #002855;
    margin-bottom: 0;
}
#request_info_layer {
    position: relative;
    height: 180px;
}
#request_info_layer_button {
    position: absolute;
    top: 48px;
    left: calc(50% - 222px);
    width: 100%;
    max-width: 440px;
    height: 82px;
    background-color: #D7823C;
    font-size: 35px;
    color: #fff;
    text-align: center;
    line-height: 220%;
    border-bottom: solid 4px #DFBC81;
    border-left: solid 3px #DFBC81;
    border-top: 0;
    border-right: 0;
    cursor: pointer;
}
#request_info_form_layer_wrapper {
    display: none;
    position: relative;
    margin-top: 0;
    width: 100%;
    height: 585px;
    background-color: #1B2857;
    overflow: auto;
}

#request_info_form_wrapper {
    position: relative;
    width: 288px;
    margin-left: calc(50% - 144px);
}

#request_info_form {
    color: #fff;
    font-family: verdana;
    font-size: 16px;
}

#request_info_form h3 {
    margin-bottom: 10px;
    font-weight: normal;
}

#request_info_form input {
    background-color: #1B2857;
    border: 2px solid #336699;
    width: 284px;
    height: 25px;
}

#request_info_form input:focus {
    border-color: #fff;
}

#request_info_form input[type=submit] {
    color: #fff;
    font-size: 20px;
    height: 50px;
    border-radius: 5px;
    border-color: #fff;
}

JavaScript

function showForm() {
    var isdisplayed = document.getElementById("request_info_form_layer_wrapper").style.display;
    if (isdisplayed == "none") {
        document.getElementById("request_info_form_layer_wrapper").style.display = "block";
        document.getElementById("request_info_layer_button").style.borderBottom = "0";
        document.getElementById("request_info_layer_button").style.borderLeft = "0";
        document.getElementById("request_info_layer_button").style.borderTop = "solid 3px #C4591B";
        document.getElementById("request_info_layer_button").style.borderRight = "solid 4px #C4591B";
    } else {
        document.getElementById("request_info_form_layer_wrapper").style.display = "none";
        document.getElementById("request_info_layer_button").style.borderTop = "0";
        document.getElementById("request_info_layer_button").style.borderRight = "0";
        document.getElementById("request_info_layer_button").style.borderLeft = "solid 3px #DFBC81";
        document.getElementById("request_info_layer_button").style.borderBottom = "solid 4px #DFBC81";
    }
}