#form_contato {
  width: 100%;
  font: normal 12px Tahoma;
  color: #fff;
  margin: 0px;
}

.input_contato {
  width: 400px;
  background: #455443;
  border: solid 1px #111;
  color: #fff;
}

#bt_contato {
  width: 100px;
  font: normal 12px Tahoma;
  background: #455443;
  border: solid 1px #111;
  color: #fff;
  padding: 3px;
}