@media only screen and (min-device-width : 320px) and (max-device-width : 480px) {
    .img-logo{
        width: 100%;
    }

    body {
        display: -ms-flexbox;
        display: flex;
        -ms-flex-align: center;
        align-items: center;
        padding-top: 60px;
        padding-bottom: 40px;
        background-color: #f5f5f5;
      }
      
      .form-signin {
        width: 100%;
        max-width: 730px;
        padding: 15px;
        margin: auto;
      }
      .form-signin .checkbox {
        font-weight: 400;
        font-size: 30px;
      }
      .form-signin .form-control {
        position: relative;
        box-sizing: border-box;
        height: auto;
        padding: 40px;
        font-size: 40px;
      }
      .form-signin .btn {
        padding: 15px;
        font-size: 50px;
        font-weight: bold;
      }

      .form-signin .form-control:focus {
        z-index: 2;
      }
      .form-signin input[type="email"] {
        margin-bottom: -1px;
        border-bottom-right-radius: 0;
        border-bottom-left-radius: 0;
      }
      .form-signin input[type="password"] {
        margin-bottom: 10px;
        border-top-left-radius: 0;
        border-top-right-radius: 0;
      }
    

    
}