#contact_form_div {
  display:block;
  position: relative;
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  height:55vw;
  min-height:900px;
  max-height:950px;
  width:100%;
}

#contact_form_table {
  display:table;
  width:100%;
  height:100%;
  margin:0 auto;
  text-align:center;
  max-width:800px;
}

#contact_form_cell {
  display:table-cell;
  vertical-align:middle;
  text-align:center;
  height:100%;
  padding:0 20px;
  background-color:rgba(0, 0, 0, .4);
}

#contact_form {
  margin:0 auto;
  width:100%;
  max-width:550px;
}

#contact_form_head {
  text-align:center;
  margin:0 auto;
  margin-bottom:25px;
  font-size:16px;
  color:#FFFFFF;
}

#contact_form_head div {
  margin-bottom:10px;
}

.contact_form_line {
  margin-bottom:20px;
}

.contact_form_line INPUT[type="text"], .contact_form_line TEXTAREA {
  padding:12px 10px;
  width:calc(100% - 20px);
  font-family:Arial; 
  font-size:15px; 
  vertical-align:middle;
  border-radius:0;
}

.contact_form_line .buttonred {
  text-align:center;
}

@media only screen and (max-width: 1000px) {

  #contact_form {
    text-align:center;
    margin:0 auto;
    max-width:500px;
    width:100%;
  }

}