body {
      font-family: Arial, sans-serif;
      background: #0d1117;
      color: #e6edf3;
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100vh;
      margin: 0;
    }
    .container {
      background: #161b22;
      padding: 20px 24px;
      border-radius: 12px;
      box-shadow: 0 6px 24px rgba(0,0,0,0.6);
      text-align: center;
      width: 320px;
    }
    input[type="number"] { width: 60px; text-align:center; }
    label { display:block; margin-top:8px; font-size:0.95rem; }
    .controls { margin-top: 12px; display:flex; gap:8px; justify-content:center; flex-wrap:wrap; }
    button {
      background: #238636;
      color: white;
      border: none;
      padding: 8px 12px;
      border-radius: 8px;
      cursor: pointer;
      font-size: 0.95rem;
    }
    button.secondary {
      background: #0f1720;
      border: 1px solid rgba(255,255,255,0.06);
    }
    button:disabled { opacity: 0.5; cursor: not-allowed; }
    .senha {
      margin-top: 14px;
      font-weight: 700;
      font-size: 1.05rem;
      word-break: break-all;
      background: rgba(255,255,255,0.03);
      padding: 8px;
      border-radius: 8px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:8px;
    }
    .msg-copiado {
      font-size: 0.85rem;
      color: #94d3a2;
      margin-top: 8px;
      min-height: 18px;
    }