Klar wirken.
Technisch stehen.

<form class="inq" method="post" action="/api/inquiry" novalidate>
  <label for="email">E-Mail</label>
  <input id="email" name="email" type="email" required autocomplete="email">
  <label for="msg">Nachricht</label>
  <textarea id="msg" name="nachricht" required minlength="10"></textarea>
  <button type="submit">Anfrage senden</button>
</form>

const form = document.querySelector('form.inq');
form.addEventListener('submit', async (e) => {
  e.preventDefault();
  if (!form.checkValidity()) return form.reportValidity();
  await fetch('/api/inquiry', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(Object.fromEntries(new FormData(form)))
  });
});

:root { --bg: #000; --ink: #fff; --mute: #a3a3a3; }
.field input:focus { outline: 2px solid #fff; outline-offset: 2px; }