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;
}

html {
  position: relative;
  min-height: 100%;
}

body {
    margin-bottom: 60px;
    padding-bottom: 60px;
    background-image: url("/imagens/fundo-eletrica.jpg");
    background-repeat: no-repeat;
    background-position: center center;
    background-attachment: fixed;
    background-size: cover;
}
    body::before {
        content: "";
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0,0,0,0.4);
        z-index: -1;
    }
h1 {
    color: #fff;
    text-shadow: 2px 2px 5px rgba(0,0,0,0.8);
}

.card {
    border-radius: 12px;
    background-color: rgba(255, 255, 255, 0.7);
}
footer {
    flex-shrink: 0;
    background-color: rgba(0, 0, 0, 0.7) !important;
    color: white;
    line-height: 20px !important; /* altura mais baixa */
}

    footer .container {
        margin: 0;
        padding: 0;
    }