gistfile1.txt

<!-- Email Form -->
    <script>
        $(document).ready(function() {
            //Save references to elements. Don't do DOM walks in event handlers when not needed.
            var $sendEmailEl = $('#send-email');
            var $subjectEl = $('#form-subject');
            var $bodyEl = $('#form-message');
            function updateEmailLink() {
                $sendEmailEl.attr('href', 'mailto:contact@zane.sh?' +
                    'subject=' + encodeURIComponent($subjectEl.val()) +
                    '&body=' + encodeURIComponent($bodyEl.val()));
            }
            $('#send-email,#form-message').on('input', updateEmailLink);
            updateEmailLink();
        });
    </script>

gistfile2.txt

<form id="contact-form">
                            <div class="form-group">
                                <input type="text" name="form-subject" id="form-subject" class="form-input" placeholder="Asunto..." required="">
                            </div>
                            
                            <div class="form-group">
                                <textarea class="form-input" name="form-message" id="form-message" placeholder="¿Cómo te puedo ayudar?" rows="5"></textarea>
                            </div>
                            <div class="text-center">
                                <a href="" id="send-email" class="bttn-1" type="submit">Enviar Mensaje</a>
                            </div>
                        </form>