html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

body {
    background-image: url('/img/cartas.png');
    background-size: cover; /* cobre a tela inteira */
    background-position: center; /* centraliza */
    background-repeat: no-repeat; /* não repete */
    background-attachment: fixed; /* efeito elegante ao rolar */
}

    /* opcional: overlay escuro para melhorar leitura */
    body::before {
        content: "";
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.65);
        z-index: -1;
    }