.center-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #f6f6f6;
  }
  
  .auth-card {
    width: 340px;
    padding: 2rem 2.25rem;
    background: #ffffff;
    border: 2px solid #b91c1c;
    border-radius: 10px;
    box-shadow: 0 6px 18px rgba(0,0,0,.10);
  }
  
  .auth-card h1 {
    margin: 0 0 1rem;
    font-size: 1.75rem;
    text-align: center;
    color: #b91c1c;
  }
  
  .auth-card form {
    margin-bottom: 1.5rem;
  }
  
  .auth-card input[type="submit"] {
    width: 100%;
    margin-top: .8rem;
  }