* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  body, html {
    height: 100%;
    font-family: Arial, sans-serif;
    background-color: #011A14;
  }

  .container {
    display: flex;
    height: 100vh;
    flex-wrap: nowrap;
    flex-direction: row; /* Padrão: lado a lado */
    background-color: #011A14;
  }

  .left-column, .right-column {
    flex: 1 1 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
  }

  .left-column {
    background-color: #011A14;
  }

  .image-container {
    max-width: 500px;
    max-height: 500px;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .image-container img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
  }

  .button-container {
    display: flex;
    flex-direction: column;
    width: 80%;
    gap: 15px;
  }

  .button-container a {
    text-decoration: none;
    display: block;
  }

  .button-container button {
    width: 100%;
    padding: 15px;
    font-size: 1.2rem;
    text-align: center;
    /*border: none;*/
    text-transform: uppercase;
    font-weight: 900;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: transform 0.2s;
  }

  .button-container button:hover {
    transform: scale(1.05);
  }

  .btImpar { background-color: #052822; }
  .btPar { 
    background-color: #579C27; 
    color: #011A14 !important;
  }
  .soprano { background-color: #e74c3c; }
  .contralto { background-color: #3498db; }
  .tenor { background-color: #2ecc71; }
  .baixo { background-color: #f39c12; }
  .playbacks { background-color: #5c5c5c; }
  .agenda { background-color: #9b59b6; }

  /* Empilhar verticalmente em telas com orientação retrato (altura > largura) */
  @media screen and (max-width: 991px) and (orientation: portrait), screen and (max-aspect-ratio: 1/1) {
    .container {
      flex-direction: column;
    }

    .left-column, .right-column {
      flex: none;
      width: 100%;
      height: auto;
    }

    .container {
      height: auto;
    }
  }