body {
    min-height: 100vh;
    background: #11151c;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Montserrat', Arial, sans-serif;
  }
  .login-wrapper {
    width: 100%;
    max-width: 430px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .login-card {
    background: #181d25;
    border-radius: 22px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.55);
    padding: 2.5rem 2.2rem 2.2rem 2.2rem;
    width: 100%;
    position: relative;
    border: 1.5px solid #232b3a;
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }
  .login-back {
    display: inline-block;
    align-self: flex-start;
    margin-bottom: 1.5rem;
    color: #8fb3ff;
    background: rgba(65, 105, 255, 0.1);
    border: 1px solid rgba(113, 145, 255, 0.25);
    border-radius: 999px;
    font-weight: 500;
    text-decoration: none;
    padding: 0.75rem 1rem;
    transition: background 0.18s, border-color 0.18s, color 0.18s, transform 0.18s;
    cursor: pointer;
  }
  .login-back:hover, .login-back:focus {
    background: rgba(80, 140, 255, 0.18);
    border-color: rgba(140, 180, 255, 0.4);
    color: #fff;
  }
  .login-header {
    text-align: center;
    margin-bottom: 2.2rem;
  }
  .login-header h2 {
    font-family: 'Orbitron', Arial, sans-serif;
    font-size: 2.4rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 0.7rem 0;
    letter-spacing: 1px;
  }
  .login-header p {
    color: #b2bed5;
    font-size: 1.05rem;
    margin: 0;
    font-weight: 400;
    line-height: 1.6;
  }
  .login-form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
  }
  .login-form input {
    width: 100%;
    padding: 1.1rem 1.25rem;
    border-radius: 16px;
    border: 1px solid rgba(95, 110, 150, 0.18);
    background: #161d29;
    color: #e1e9ff;
    font-size: 1.08rem;
    font-family: inherit;
    margin-bottom: 0;
    outline: none;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.03);
    transition: border-color 0.18s, background 0.18s, box-shadow 0.18s;
  }
  .login-form input:focus {
    background: #202734;
    box-shadow: 0 0 0 2px rgba(127, 214, 255, 0.35);
    border-color: rgba(127, 214, 255, 0.35);
  }
  .login-form input::placeholder {
    color: #8ea2c6;
    opacity: 1;
    font-size: 1rem;
  }
  .login-submit {
    display: block;
    width: 100%;
    margin-top: 1.2rem;
    padding: 0.95rem 0;
    font-size: 1.1rem;
    font-weight: 700;
    color: #e9f2ff;
    background: linear-gradient(135deg, rgba(70, 135, 255, 0.95), rgba(105, 180, 255, 0.85));
    border: 1.5px solid rgba(106, 163, 255, 0.4);
    border-radius: 999px;
    cursor: pointer;
    transition: transform 0.18s, background 0.18s, box-shadow 0.18s;
    box-shadow: 0 16px 30px rgba(59, 116, 208, 0.18);
    font-family: 'Tintin', Arial, sans-serif;
    letter-spacing: 0.01em;
  }
  .login-submit:hover, .login-submit:focus {
    color: #fff;
    background: linear-gradient(135deg, rgba(95, 158, 255, 1), rgba(125, 190, 255, 0.95));
    border-color: rgba(125, 190, 255, 0.55);
    box-shadow: 0 20px 36px rgba(59, 116, 208, 0.24);
    transform: translateY(-1px);
  }
  .login-footer-text {
    margin-top: 18px;
    text-align: center;
    font-size: 0.95rem;
    color: #a1aecf;
  }
  .code-input-help {
    margin-top: -6px;
    margin-bottom: 2px;
    text-align: left;
    font-size: 0.9rem;
    color: #a1aecf;
  }
  .code-normalization-msg {
    margin-top: -8px;
    margin-bottom: 2px;
    text-align: left;
    font-size: 0.86rem;
    color: #7fd6ff;
    min-height: 1.15rem;
  }
  .login-footer-text a {
    color: #9dc9ff;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.18s;
  }
  .login-footer-text a {
    color: #89b9ff;
    text-decoration: none;
    transition: color 0.18s;
  }
  .login-footer-text a:hover,
  .login-footer-text a:focus {
    color: #d6e8ff;
  }
  @media (max-width: 600px) {
    .login-card {
      padding: 1.4rem 1.4rem;
      background: none;
      border-radius: 22px;
      box-shadow: none;
      width: 100%;
      position: relative;
      border: none;
      display: flex;
      flex-direction: column;
      align-items: stretch;
    }

    .login-header h2 {
      font-size: 1.7rem;
    }
    .login-header p {
      font-size: 1rem;
    }
    .login-submit {
      font-size: 1rem;
      padding: 0.85rem 0;
    }
  }