@media screen and (max-width: 575px) {
  body {
    width: 100%;
  }
  .login-container {
    width: 90%;
    height: unset;
    padding: 40px 0;
  }

  .login-container-left {
    width: 100%;
  }

  .login-container-right {
    display: none;
  }

  .login-input-group {
    width: 80%;
  }

  button#login-btn {
    width: 70%;
  }

  nav {
    display: none;
    position: absolute;
    top: 90px;
    width: calc(100% - 20px);
    height: calc(100% - 70px - 30px);
  }

  .content {
    display: flex;
  }

  main {
    width: 100%;
    margin: 0;
  }

  .header-left {
    width: calc(100% - 150px);
    padding: 10px;
  }

  button#btn-menu {
    display: flex;
  }

  .header-left h2 {
    font-size: 20px;
  }

  .header-right {
    width: 150px;
    padding: 10px;
  }

  p#username {
    display: none;
  }
}

@media screen and (min-width: 576px) and (max-width: 767px) {
}

@media screen and (min-width: 768px) and (max-width: 991px) {
}

@media screen and (min-width: 992px) and (max-width: 1199px) {
}

@media screen and (mix-width: 1200px) and (max-width: 1399px) {
}

@media screen and (min-width: 1400px) {
}