html,
body {
  height: 100%;
}

body {
  display: -ms-flexbox;
  display: flex;
  -ms-flex-align: center;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 40px;
  background-color: #f5f5f5;
}

.form-signin {
  width: 100%;
  max-width: 330px;
  padding: 15px;
  margin: auto;
}
.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="email"] {
  margin-bottom: 10px;
  border-radius: 0.25rem;
}
.form-signin input[type="password"] {
  margin-bottom: 10px;
  border-radius: 0.25rem;
}
.ulogin-button-vkontakte, .ulogin-button-odnoklassniki, .ulogin-button-google, .ulogin-button-facebook, .ulogin-button-mailru, .ulogin-button-yandex{
  background-image: url('../images/providers-32-classic.png') !important;
}

@media screen and (max-width:758px){
    .display-4{
        font-size: 1.5rem !important;
    }
}