html {
    height: 100%;
  }
  
  body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    min-height: 100%;
    background: grey;
  }
  
  /* Animation Keyframes */
  @keyframes scale_header {
    0%   {max-height: 0px; margin-bottom: 0px; opacity: 0;}
    100% {max-height: 117px; margin-bottom: 25px; opacity: 1;}
  }
  
  @keyframes input_opacity {
    0%   {transform: translateY(-10px); opacity: 0}
    100% {transform: translateY(0px); opacity: 1}
  }
  
  @keyframes text_opacity {
    0% {color: transparent;}
  }
  
  @keyframes error_before {
    0%   {height: 5px; background: rgba(0, 0, 0, 0.156); color: transparent;}
    10%  {height: 117px; background: #FFFFFF; color: #C62828}
    90%  {height: 117px; background: #FFFFFF; color: #C62828}
    100% {height: 5px; background: rgba(0, 0, 0, 0.156); color: transparent;}
  }
  
  
  /* Login Form */
  .login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    width: 340px;
    height: auto;
    padding: 5px;
    box-sizing: border-box;
  }
  
  .login-container img {
    width: 200px;
    margin: 0 0 20px 0;
  }
  
  .login-container p {
    align-self: flex-start;
    font-family: 'Roboto', sans-serif;
    font-size: 0.8rem;
    color: rgba(0, 0, 0, 0.5);
  }
  
  .login-container p a {
    color: rgba(0, 0, 0, 0.4);
  }
  
  .login {
    position: relative;
    width: 100%;
    padding: 10px;
    margin: 0 0 10px 0;
    box-sizing: border-box;
    border-radius: 3px;
    background: #FAFAFA;
    overflow: hidden;
    animation: input_opacity 0.2s cubic-bezier(.55, 0, .1, 1);
    box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14),
                0 1px 5px 0 rgba(0, 0, 0, 0.12),
                0 3px 1px -2px rgba(0, 0, 0, 0.2);
  }
  
  .login > header {
    position: relative;
    width: 100%;
    padding: 10px;
    margin: -10px -10px 25px -10px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    background: #17A2B8;
    font-family: 'Roboto', sans-serif;
    font-size: 1.3rem;
    color: #FAFAFA;
    animation: scale_header 0.6s cubic-bezier(.55, 0, .1, 1), text_opacity 1s cubic-bezier(.55, 0, .1, 1);
    box-shadow: 0px 2px 2px 0px rgba(0, 0, 0, 0.14),
                0px 1px 5px 0px rgba(0, 0, 0, 0.12),
                0px 3px 1px -2px rgba(0, 0, 0, 0.2);
  }
  
  .login > header:before {
    content: '';
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    width: 100%;
    height: 5px;
    padding: 10px;
    margin: -10px 0 0 -10px;
    box-sizing: border-box;
    background: rgba(0, 0, 0, 0.156);
    font-family: 'Roboto', sans-serif;
    font-size: 0.9rem;
    color: transparent;
    z-index: 5;
  }
  
  .login.error_1 > header:before,
  .login.error_2 > header:before {
    animation: error_before 3s cubic-bezier(.55, 0, .1, 1);
  }
  
  .login.error_1 > header:before {
    content: 'Invalid username or password!';
  }
  
  .login.error_2 > header:before {
    content: 'Invalid or expired Token!';
  }
  
  .login > header h2 {
   
  }
  
  .login > header h4 {
    font-size: 0.7em;
    animation: text_opacity 1.5s cubic-bezier(.55, 0, .1, 1);
    color: rgba(255, 255, 255, 0.4);
  }
  
  /* Form */
  .login-form {
    padding: 15px;
    box-sizing: border-box;
  }
  
  
  /* Inputs */
  .login-input {
    position: relative;
    width: 100%;
    padding: 10px 5px;
    margin: 0 0 25px 0;
    border: none;
    border-bottom: 2px solid rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
    background: transparent;
    font-size: 1rem;
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    opacity: 1;
    animation: input_opacity 0.8s cubic-bezier(.55, 0, .1, 1);
    transition: border-bottom 0.2s cubic-bezier(.55, 0, .1, 1);
  }
  
  .login-input:focus {
    outline: none;
    border-bottom: 2px solid #E37F00;
  }
  
  
  /* Submit Button */
  .submit-container {
    display: flex;
    flex-direction: row;
    justify-content: flex-end;
    position: relative;
    padding: 10px;
    margin: 35px -25px -25px -25px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
  }
  
  .login-button {
    padding: 10px;
    border: none;
    border-radius: 3px;
    background: transparent;
    font-family: 'Roboto', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    color: #E37F00;
    cursor: pointer;
    opacity: 1;
    animation: input_opacity 0.8s cubic-bezier(.55, 0, .1, 1);
    transition: background 0.2s ease-in-out;
  }
  
  .login-button.raised {
    padding: 5px 10px;
    color: #FAFAFA;
    background: #E37F00;
    box-shadow: 0px 2px 2px 0px rgba(0, 0, 0, 0.137255),
                0px 1px 5px 0px rgba(0, 0, 0, 0.117647),
                0px 3px 1px -2px rgba(0, 0, 0, 0.2);
  }
  
  .login-button:hover {
    background: rgba(0, 0, 0, 0.05);
  }
  
  .login-button.raised:hover {
    background: #FDAB43;
  }