Hi Wsinw,

You save this code to the last line in style.css file:

.awe-text-wrapper .awe-text {
  border-width: 0;
  background-color: #fff;
  line-height: 30px;
  height: 30px;
  color: #333333;
  font-weight: 500;
  width: 100%;
}
.awe-text-wrapper .awe-text::-webkit-input-placeholder {
  color: #333333;
}
.awe-text-wrapper .awe-text:-moz-placeholder {
  color: #333333;
}
.awe-text-wrapper .awe-text::-moz-placeholder {
  color: #333333;
}
.awe-text-wrapper .awe-text:-ms-input-placeholder {
  color: #333333;
}

HTML:

<label>Promo code</label>
<div class="awe-text-wrapper">
    <input type="text" class="awe-text" placeholder="Code">
</div>