html,
body {
  height: 100%;
}

.estiloForm {
  background-color: #fff;
  text-align: center;
}

.form-signin {
  width: 100%;
  max-width: 100%;
  padding: 15px;
  margin: 0 auto;
}
.form-signin-case {
  width: 100%;
  max-width: 100%;
  padding: 15px;
  margin: 0 auto;
}
.form-signin .form-control {
  position: relative;
  box-sizing: border-box;
  height: auto;
  padding: 10px;
  font-size: 16px;
}
.form-signin .form-control:focus {
  z-index: 2;
}
.form-signin-case .form-control {
  position: relative;
  box-sizing: border-box;
  height: auto;
  padding: 10px;
  font-size: 16px;
}
.form-signin-case .form-control:focus {
  z-index: 2;
}