* { margin: 0; padding: 0; box-sizing: border-box; }
  body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #F8F6FC;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 24px;
  }
  .wrap { max-width: 420px; }
  .logo { font-size: 1.6rem; font-weight: 800; color: #1F2937; margin-bottom: 28px; }
  .logo span { color: #10B981; }
  .code { font-size: 5rem; font-weight: 900; color: #6D28D9; line-height: 1; margin-bottom: 8px; }
  h1 { font-size: 1.3rem; color: #1F2937; margin-bottom: 10px; }
  p { color: #6B7280; font-size: .95rem; margin-bottom: 28px; line-height: 1.5; }
  a.btn {
    display: inline-block;
    background: #6D28D9;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 12px;
    font-size: .9rem;
  }