<div class="piece">
    <div class="piece-attach piece-attach-left-top"></div>
    <div class="piece-attach piece-attach-right"></div>
    <div class="piece-attach piece-attach-left-bottom"></div>

    <div class="piece-form">
        <div class="piece-form-title">Contexte de la mission 1</div>
        <div class="piece-form-duration">
            <label for="duration">Durée</label>
            <input name="duration" type="text" placeholder="1h"/>   
        </div>
        <div class="piece-form-intrigue">
            <label for="intrigue">Intrigue</label>
            <textarea name="intrigue" placeholder="Faites prospérer les commerces essentiels du centre ville pour redresser l’économie du village et attirer de nouveaux habitants"></textarea>  
        </div>
        <div class="piece-form-other">
            <label for="other">Autre</label>
            <textarea name="other" placeholder="Test"></textarea>  
        </div> 
    </div>
</div>