body {
    font-family: Arial, sans-serif;
    background: #10141a;
    color: #e4e7ea;
    margin: 0;
    padding: 2rem;
  }
  h1 { text-align: center; }
  .card {
    background: #1c222b;
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1rem auto;
    max-width: 480px;
    box-shadow: 0 0 8px rgba(0,0,0,0.5);
  }
  label {
    display: block;
    margin: .5rem 0;
  }
  input {
    width: 100%;
    padding: .4rem;
    border-radius: 6px;
    border: 1px solid #39404c;
    background: #161b22;
    color: #e4e7ea;
  }
  button {
    margin-top: .8rem;
    padding: .6rem 1rem;
    border: none;
    border-radius: 6px;
    background: #4c8aff;
    color: white;
    cursor: pointer;
  }
  button:hover { background: #3a6fd1; }
  p { word-break: break-all; }