form { width: 100%; max-width: 600px; }
input, textarea, select {
  font-family: 'DM Sans', sans-serif;
  font-size: 18px;
  font-weight: 300;
  padding: 15px 0 15px 18px;
  margin-bottom: 20px;
  border: 0;
  border-radius: 0;
  background-color: #D8D3CB;
  width: 100%;
  display: block;
  color: #000;
}
textarea { min-height: 140px; resize: vertical; }
::placeholder { color: #000; opacity: 1; }

.btn-submit {
  border: 1px solid #000;
  background-color: transparent;
  font-weight: 400;
  font-size: 18px;
  letter-spacing: 1px;
  padding: 15px 40px;
  max-width: 300px;
  cursor: pointer;
  border-radius: 0;
  transition: 0.3s;
  font-family: inherit;
}
.btn-submit:hover { color: #fff; background-color: #000; }

.bg-green input, .bg-green textarea {
  background-color: rgba(255,255,255,0.15);
  color: #fff;
}
.bg-green ::placeholder { color: rgba(255,255,255,0.85); }
.bg-green .btn-submit { border-color: #fff; color: #fff; }
.bg-green .btn-submit:hover { background: #fff; color: #000; }

.file-label {
  display: block;
  margin-bottom: 20px;
  font-size: 14px;
  opacity: 0.7;
}