html {
  box-sizing: border-box;
}
*,
*:before,
*:after {
  box-sizing: inherit;
}
body {
  font-family: 'Roboto', sans-serif;
  font-size: 16px;
}
@media (min-width: 768px) {
  body {
    font-size: 37px;
  }
}
@media (min-width: 998px) {
  body {
    font-size: 16px;
    background: url(../images/fondo_login.gif);
    background-repeat: no-repeat;
    background-size:cover;
    background-position: center center;
  }
}
.login-user {
  display: flex;
  align-items: center;
  height: 100vh;
}

.contenedor-login-user {
  width: 95%;  
  margin: 0 auto;
  background-color: #ffffff;
  border-radius: 5px;
}
@media (min-width: 998px) {
  .contenedor-login-user {
    width: 350px;
  } 
}
form {
  padding: 25px;
}
label {
  text-transform: uppercase;
  font-weight: bold;
}
.btn {
  color: white;
  font-weight: bold;
  background-color: #040431;
  border: none;
  text-transform: uppercase;
  padding: 10px 30px;
  display: inline-block;
  text-align: center;
  width: 100%;
  margin-bottom: 10px;
  border-radius:3px;
  cursor: pointer;
}
@media (min-width: 768px) {
  .btn {
    margin-bottom: 20px;
  } 
}
@media (min-width: 998px) {
  .btn {
    margin-bottom: 10px;
  } 
}
input:not([type="button"]) {
  padding: 10px;
  margin-bottom: 20px;
  border: none;
  display: block;
  width: 100%;
  border: 2px solid #e1e1e1;
  border-radius: 3px;
}
.img-logo {
  display: flex;
  justify-content: center;
  margin-bottom: 30px;
}
.img-logo img {
  height:250px;
}
@media (min-width: 768px) {
  .img-logo img {
    height:450px;
  }
}
@media (min-width: 998px) {
  .img-logo img {
    height:200px;
  }
}