* { margin: 0; padding: 0; box-sizing: border-box; }
  body {
    background: #0f1117;
    color: #e2e8f0;
    font-family: 'Segoe UI', sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .card {
    background: #1a1d27;
    border: 1px solid #2d3149;
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.5);
  }
  .logo { text-align: center; margin-bottom: 32px; }
  .logo-icon { font-size: 48px; margin-bottom: 8px; }
  .logo h1 { font-size: 24px; color: #25D366; font-weight: 700; }
  .logo p { font-size: 13px; color: #64748b; margin-top: 4px; }
  .form-group { margin-bottom: 16px; }
  label { display: block; font-size: 13px; color: #94a3b8; margin-bottom: 6px; font-weight: 500; }
  input {
    width: 100%;
    background: #0f1117;
    border: 1px solid #2d3149;
    color: #e2e8f0;
    padding: 11px 14px;
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
  }
  input:focus { border-color: #25D366; }
  .btn {
    width: 100%;
    background: #25D366;
    color: #000;
    border: none;
    padding: 12px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 8px;
    transition: background 0.2s;
  }
  .btn:hover { background: #1ebe59; }
  .btn:disabled { background: #1a4a2e; color: #64748b; cursor: not-allowed; }

  /* Alert boxes */
  .alert {
    border-radius: 10px;
    padding: 14px 16px;
    font-size: 13px;
    margin-bottom: 18px;
    display: none;
    line-height: 1.5;
  }
  .alert.show { display: block; }

  .alert-error {
    background: #2d1717;
    border: 1px solid #7f1d1d;
    color: #fca5a5;
  }
  .alert-suspend {
    background: #1f1200;
    border: 1px solid #92400e;
    color: #fcd34d;
  }
  .alert-maintenance {
    background: #0f1f3d;
    border: 1px solid #1e3a8a;
    color: #93c5fd;
  }

  .alert-title {
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .alert-body { color: inherit; opacity: 0.9; }
  .alert-meta {
    margin-top: 8px;
    font-size: 11px;
    opacity: 0.6;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 8px;
  }

  @media (max-width: 480px) {
    body { padding: 16px; }
    .card { padding: 24px 20px; }
    .logo-icon { font-size: 36px; }
    .logo h1 { font-size: 20px; }
  }