:root {
    --color-white: #f3f3f3;
    --color-darkblue: #1b1b32;
    --color-darkblue-alpha: rgba(27, 27, 50, 0.8);
    --color-green: #37af65;
  }
  
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.4;
    color: var(--color-white);
    margin: 0;
  }
  
  /* mobile friendly alternative to using background-attachment: fixed */
  body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    z-index: -1;
    background: var(--color-darkblue);
    background-image: linear-gradient(
        115deg,
        rgba(58, 58, 158, 0.8),
        rgba(136, 136, 206, 0.7)
      ),
      url(img/server.webp);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
  }
  
  h1 {
    font-weight: 400;
    line-height: 1.2;
  }
  
  p {
    font-size: 1.125rem;
  }
  
  h1,
  p {
    margin-top: 0;
    margin-bottom: 0.5rem;
  }
  
  label {
    display: flex;
    align-items: center;
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
  }
  
  input,
  button,
  select,
  textarea {
    margin: 0;
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
  }
  
  button {
    border: none;
  }
  
  .container {
    width: 100%;
    margin: 3.125rem auto 0 auto;
  }
  
  @media (min-width: 576px) {
    .container {
      max-width: 540px;
    }
  }
  
  @media (min-width: 768px) {
    .container {
      max-width: 720px;
    }
  }
  
  .header {
    padding: 0 0.625rem;
    margin-bottom: 1.875rem;
  }
  
  .description {
    font-style: italic;
    font-weight: 200;
    text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.4);
  }
  
  .clue {
    margin-left: 0.25rem;
    font-size: 0.9rem;
    color: #e4e4e4;
  }
  
  .text-center {
    text-align: center;
  }
  
  /* form */
  
  form {
    background: var(--color-darkblue-alpha);
    padding: 2.5rem 0.625rem;
    border-radius: 0.25rem;
  }
  
  @media (min-width: 480px) {
    form {
      padding: 2.5rem;
    }
  }
  
  .form-group {
    margin: 0 auto 1.25rem auto;
    padding: 0.25rem;
  }
  
  .form-control {
    display: block;
    width: 100%;
    height: 2.375rem;
    padding: 0.375rem 0.75rem;
    color: #495057;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  }
  
  .form-control:focus {
    border-color: #80bdff;
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
  }
  
  .input-radio,
  .input-checkbox {
    display: inline-block;
    margin-right: 0.625rem;
    min-height: 1.25rem;
    min-width: 1.25rem;
  }
  
  .input-textarea {
    min-height: 120px;
    width: 100%;
    padding: 0.625rem;
    resize: vertical;
  }
  
  .submit-button {
    display: block;
    width: 100%;
    padding: 0.75rem;
    background: var(--color-green);
    color: inherit;
    border-radius: 2px;
    cursor: pointer;
  }