@media (max-width: 640px) and (orientation:portrait){
  body {
    background: rgb(0, 0, 0);
  }
  form {
    width: 240px;/*ancho de tabla*/
    background-color: #56a85a;
    padding: 90px;
    border-radius: 50px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 1.1);
    margin: 0 auto;/*centra en horizontal*/
  }
  h2{
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    color: #f72626;

  }
  label {
    display: block;
    margin-bottom: 10px;
  }

  input[type="text"],
  input[type="password"] {
    width: 120%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    margin-bottom: 10px;
    font-size: 24px;
  }
  
  input[type="submit"] {
    font-size: 22px;
    background-color: #af704c;
    color: #fff;
    padding: 14px 60px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
  }

  .ocultar-div{
    display:none;
}
}