* {
    margin: none;
    padding: none;
    box-sizing: border-box;
  }
  
  body {
    height: 100vh;
    width: 100%;
    background-image: linear-gradient(
        45deg,
        rgba(0, 73, 190, 0.6),
        rgba(0, 73, 190, 0.6)
      ),
      url(../../img/login/city3.jpg);
    background-size: cover;
    background-repeat: none;
  }
  
  .heading-main {
    color: rgb(255, 255, 255);
    font-family: "Montserrat";
    font-size: 3.4em;
    font-weight: 500;
    margin-top: 16%;
    margin-left: 6%;
    display: inline-block;
    animation: backInLeft;
    animation-duration: 2s;
  }
  
  .login-box {
    display: block;
    float: right;
    height: 100vh;
    width: 27%;
    background-color: white;
    float: top;
    box-shadow: 0px 0px 10px 0px rgba(0, 0, 0, 0.75);
  }
  
  .img-logo {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 130.5px;
    box-shadow: 0 0px 2px -2px rgba(0, 0, 0, 0.65);
    background-color: #004fba;
  }
  
  input.is-invalid {
    border-top: none !important;
    border-left: none !important;
    border-right: none !important;
    border-radius: 0px !important;
    box-shadow: none !important;
    width: 100% !important;
    border-bottom-color: rgb(153, 152, 152) !important;
    border-width: 1.3px;
  }
  input.is-invalid:focus {
    box-shadow: none !important;
    border-bottom-color: #1674f7 !important;
    border-width: 1.3px;
  }
  
  .logo {
    width: 100%;
  }
  
  .login-heading {
    display: block;
    margin-top: 1.4em;
    font-family: "Montserrat";
    font-size: 2em;
    color: black;
    text-align: center;
  }
  
  .username {
    margin-top: 1.5em;
    margin-right: auto;
    margin-left: auto;
    display: block;
    width: 95%;
  }
  
  .input {
    margin-top: 2em;
  }
  
  .login-btn {
    font-family: "Montserrat";
    font-size: 1.5em;
    color: white;
    background-color: #004fba;
    border-bottom: 0.2em solid #004fba;
    width: 100%;
    padding: 0.25em;
    text-align: center;
    display: block;
    margin: 1em auto;
    transition: background-color 0.2s;
    outline: none;
    border: none;
  }
  
  .login-btn:hover {
    background-color: #0c60d6;
  }
  
  /* Error Box CSS*/
  .error-box {
    position: fixed;
    bottom: 20px;
    left: 20px;
    width: 400px;
    text-align: center;
    display: block;
    background-color: #f8a0a0;
    font-family: "Montserrat";
    margin: 2em auto;
    display: flex;
    min-height: 73px;
    border-right: 2px solid #d82b2b;
    box-shadow: 0px 0px 8px rgba(0, 0, 0, 0.65);
  }
  .err-icon {
    background-color: #d82b2b;
    color: white;
    width: 90px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 25px;
  }
  .err-msg {
    background-color: white;
    padding: 8px 10px 5px 10px;
  }
  .error-title {
    color: #d82b2b;
    font-weight: 600;
    font-size: 19px;
  }
  .error-content {
    font-size: 14px;
    font-weight: 500;
  }
  
  .checkbox-container {
    display: flex;
    flex-direction: row;
    margin-top: 17px;
    align-items: center;
  }
  .checkbox-container label {
    margin: 0;
    margin-left: 5px;
    position: relative;
    bottom: 1.5px;
  }
  
  .input-container {
    display: flex;
    flex-direction: column;
  }
  
  @media all and (max-width: 1200px) {
    .heading-main {
      font-size: 2.75em;
    }
    .login-box {
      width: 45%;
      margin-left: 5%;
    }
  }
  
  @media all and (max-width: 955px) {
    .heading-main {
      font-size: 2.5em;
    }
  }
  
  @media all and (max-width: 882px) {
    .heading-main {
      font-size: 2.25em;
    }
  }
  
  @media all and (max-width: 810px) {
    .heading-main {
      font-size: 2em;
    }
  }
  
  @media all and (max-width: 750px) {
    body {
      height: 100%;
    }
    .login-box {
      width: 100%;
      height: 100vh;
    }
    .logo {
      width: 50%;
      text-align: center;
      margin: auto auto;
      display: block;
    }
    .login-btn {
      margin: auto auto;
    }
    .login-btn:link {
      margin: auto auto;
    }
    .login-btn:hover {
      margin: auto auto;
    }
    .heading-main {
      display: none;
    }
    .error-box {
      left: 50px;
      bottom: 60px;
    }
  }

  .invisible {
    display: none;
  }
  
  @media all and (max-width: 450px) {
    .heading-main {
      font-size: 2em;
    }
  }
  
  @media all and (max-width: 350px) {
    .heading-main {
      font-size: 1.75em;
      margin-top: 25%;
      margin-bottom: 25%;
    }
  
    @media all and (max-width: 300px) {
      .heading-main {
        font-size: 1.5em;
        margin-top: 25%;
        margin-bottom: 25%;
      }
    }
  }