* {
    box-sizing: border-box;
  }
  
  body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    margin: 0;
    padding: 20px;
  }
  
  h1 {
    text-align: center;
  }
  
  .container {
    max-width: 700px;
    margin: auto;
  }
  
  /* Estilo base para formulários e cartões */
  form,
  .card,
  .sucesso-msg {
    background: #fff;
    padding: 16px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 20px;
  }
  
  form input,
  form select,
  form button {
    width: 100%;
    margin-top: 12px;
    margin-bottom: 12px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 1rem;
  }
  
  button {
    background: #21366B;
    color: #fff;
    border: none;
    cursor: pointer;
    transition: background 0.3s;
  }
  
  button:hover {
    background: #0056b3;
  }
  
  .hidden {
    display: none;
  }
  
  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
  }
  
  .card {
    border: 1px solid #ddd;
    padding: 12px;
    border-radius: 10px;
    background: #ffffff;
  }
  
  .card h3 {
    margin-top: 0;
  }
  
  .sucesso-msg {
    color: green;
    font-weight: bold;
    background: #e6ffe6;
    border: 1px solid green;
  }
  
  /* Botões em grupo */
  .actions {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
    gap: 10px;
  }
  
  /* Responsividade */
  @media (max-width: 600px) {
    .actions {
      flex-direction: column;
    }
  
    .card {
      font-size: 0.95rem;
    }
  }