body {
  padding-top: 40px;
  padding-bottom: 40px;
  background-color: whitesmoke;
}

.form-signin {
  max-width: 330px;
  padding: 15px;
  margin: 0 auto;
}
.form-signin .form-signin-heading,
.form-signin .checkbox {
  margin-bottom: 10px;
}
.form-signin .checkbox {
  font-weight: 400;
}
.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 input[type="login"] {
  margin-bottom: -1px;
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
}
.form-signin input[type="senha"] {
  margin-bottom: 10px;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

.btn {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 18px;
}
.container {
  padding-right: 15px;
  padding-left: 15px;
  margin-right: auto;
  margin-left: auto;
  width: auto;
  height: auto;
}
.errspan {
  float: right;
  width: 20px;
  margin-right: 5%;
  margin-top: -30px;
  position: relative;
  z-index: 2;
  color: dimgray;
}
.form-control {
  display: block;
  width: 100%;
  height: calc(2.25rem + 2px);
  padding: .375rem .75rem;
  font-size: 1rem;
  line-height: 1.5;
  color: #495057;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid #ced4da;
  border-radius: 0;
  transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}

@media only screen and (max-width: 1368px) {
	.container {
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
    width: 30%;
    height: auto;
  }
}

@media only screen and (max-width: 400px) {
	.container {
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
    width: 100%;
    height: auto;
  }
}