Carbon footprint pre-assessment

<form id="preassess-form-en" class="preassess-form">
  <div class="form-grid">
    <label>
      Company name (optional)
      <input type="text" name="company" placeholder="Acme Ltd">
    </label>
    <label>
      Email (to receive the result, optional)
      <input type="email" name="email" placeholder="name@company.com">
    </label>
    <label>
      Sector
      <select name="sector" required>
        <option value="" disabled selected>Select</option>
        <option>Manufacturing</option>
        <option>Energy / Utilities</option>
        <option>Services</option>
        <option>Logistics / Transport</option>
        <option>Food & Agri</option>
        <option>ICT</option>
        <option>Other</option>
      </select>
    </label>
    <label>
      Main country
      <input type="text" name="country" placeholder="Italy" required>
    </label>
    <label>
      Annual revenue
      <select name="revenue" required>
        <option value="" disabled selected>Select</option>
        <option>< €5M</option>
        <option>€5–20M</option>
        <option>€20–100M</option>
        <option>€100–500M</option>
        <option>> €500M</option>
      </select>
    </label>
    <label>
      Employees
      <select name="employees" required>
        <option value="" disabled selected>Select</option>
        <option>< 50</option>
        <option>50–250</option>
        <option>250–1,000</option>
        <option>> 1,000</option>
      </select>
    </label>
    <label>
      Electricity use (kWh/year)
      <input type="number" name="electricity" min="0" step="1000" placeholder="100000" required>
    </label>
    <label>
      Natural gas (Smc/year)
      <input type="number" name="gas" min="0" step="100" placeholder="50000">
    </label>
    <label>
      Fleet fuels (litres/year)
      <input type="number" name="fuels" min="0" step="100" placeholder="20000">
    </label>
    <label>
      Main output (units/year, optional)
      <input type="text" name="output" placeholder="e.g. 1,000 t product">
    </label>
  </div>

  <label class="consent">
    <input type="checkbox" name="consent" required>
    I consent to processing these data to receive the preliminary estimate (see Privacy Policy).
  </label>

  <div class="form-actions">
    <button type="submit" class="btn btn-primary">Send & calculate</button>
    <p class="helper">You’ll see a preliminary estimate on screen. The full calculator will be activated soon.</p>
  </div>
</form>