<% content_for :page_title do %>
  Your details
<% end %>

<div class="inner-block">
  <form action="/contact-details" method="post" class="form">
    <div class="form-group">
      <label class="form-label-bold" for="name">First name</label>
      <input type="text" class="form-control" id="name" name="name">
    </div>

    <div class="form-group">
      <label class="form-label-bold" for="surname">Last name</label>
      <input type="text" class="form-control" id="surname" name="surname">
    </div>

    <div class="form-group">
      <label class="form-label-bold" for="full-name">Email</label>
      <input type="text" class="form-control" id="email" name="email">
    </div>

    <div class="form-group">
      <label class="form-label-bold" for="full-name">Phone</label>
      <input type="text" class="form-control" id="phone" name="phone">
    </div>

    <div class="form-group">
      <input type="submit" class="button" value="Continue">
    </div>
  </form>
</div>

<% content_for :page_title do %>
  Your details
<% end %>

<div class="inner-block">
  <form action="/contact-details" method="post" class="form">
    <div class="form-group">
      <label class="form-label-bold" for="name">First name</label>
      <input type="text" class="form-control" id="name" name="name">
    </div>

    <div class="form-group">
      <label class="form-label-bold" for="surname">Last name</label>
      <input type="text" class="form-control" id="surname" name="surname">
    </div>

    <div class="form-group">
      <label class="form-label-bold" for="full-name">Email</label>
      <input type="text" class="form-control" id="email" name="email">
    </div>

    <div class="form-group">
      <label class="form-label-bold" for="full-name">Mobile Phone</label>
      <p class="form-hint">Include a country code, for example +447813123456</p>
      <input type="text" class="form-control" id="phone" name="phone">
    </div>

    <div class="form-group">
      <input type="submit" class="button" value="Continue">
    </div>
  </form>
</div>

Add hint to phone field
Add hint to phone field