body {
    margin: 0;
    padding: 0;
    background: url(../img/fondoLogin.jpg) no-repeat center top;    
    background-size: cover;
    font-family: 'Roboto Condensed', sans-serif;
    height: 100vh;
  }
  
  .login-caja {
    width: 400px;
    height: 500px;
    background: #3999A5;
    color: #000;
    top: 50%;
    left: 50%;
    position: absolute;
    transform: translate(-50%, -50%);
    box-sizing: border-box;
    padding: 70px 30px;
    border-radius: 20px;
  }
  
  .login-caja .avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    position: absolute;
    top: -50px;
    left: calc(50% - 50px);
  }
  
  .login-caja h1 {
    margin: 0;
    padding: 0 0 20px;
    text-align: center;
    font-size: 22px;
    color: #fff;
  }
  
  .login-caja label {
    margin: 0;
    padding: 0;
    font-weight: bold;
    display: block;
  }
  
  .login-caja input {
    width: 100%;
    margin-bottom: 20px;
  }
  
  .login-caja input[type="text"], .login-box input[type="password"] {
    border: none;
    border-bottom: 1px solid #fff;
    background: transparent;
    outline: none;
    height: 40px;
    color: #fff;
    font-size: 16px;
  }
  
  .login-caja input[type="submit"] {
    border: none;
    outline: none;
    height: 40px;
    background: #1B5465;
    color: #fff;
    font-size: 18px;
    border-radius: 20px;
  }
  
  .login-caja input[type="submit"]:hover {
    cursor: pointer;
    background: rgb(3, 139, 3);
    color: #fff;
  }
  
  .login-caja a {
    text-decoration: none;
    font-size: 12px;
    line-height: 20px;
    color: black;
  }
  
  .login-caja a:hover {
    color: blue;
  }
  
  @media only screen and (max-width: 375px) {
    .login-caja{
        width: 100%;
    }
    .login-caja form{
        width: 95%;
        padding: 0 1em;    
  }
}