:root {
    --bs-primary: #000000;
    --bs-primary-rgb: 0, 0, 0;
    --bs-border-radius: 0;
    --bs-border-radius-lg: 0;
    --bs-border-radius-sm: 0;
    --bs-body-font-family: 'Courier New', Courier, monospace;
    --bs-body-color: #000000;
    --bs-body-bg: #ffffff;

    --cor-preto: #000000;
    --cor-branco: #ffffff;
}

* {
    border-radius: 0 !important;
}

body {
    line-height: 1.5;
}

a {
    color: inherit;
}

.navbar {
    background-color: var(--cor-branco);
    border-bottom: 4px solid var(--cor-preto);
    padding-top: 10px;
    padding-bottom: 10px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: bold;
    font-size: 22px;
    text-transform: uppercase;
    color: var(--cor-preto) !important;
}

.navbar-brand span {
    border: 2px solid var(--cor-preto);
    padding: 2px 8px;
    background-color: var(--cor-preto);
    color: var(--cor-branco);
}

.navbar .nav-link {
    color: var(--cor-preto);
    font-weight: bold;
    text-transform: uppercase;
    padding: 6px 12px;
    border: 2px solid transparent;
    transition: background-color 0.1s, color 0.1s;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
    background-color: var(--cor-preto);
    color: var(--cor-branco) !important;
    border-color: var(--cor-preto);
}

.navbar-toggler {
    border: 2px solid var(--cor-preto) !important;
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 0.2rem rgba(0, 0, 0, 0.25) !important;
}

.hero {
    background-color: var(--cor-preto);
    border-bottom: 4px solid var(--cor-preto);
}

.hero h1 {
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: -1px;
}

.hero-logo svg {
    width: 170px;
    height: 165px;
}

.badge-4d {
    background-color: var(--cor-branco);
    color: var(--cor-preto);
    border: 1px solid var(--cor-branco);
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: bold;
    padding: 5px 10px;
}

.card {
    border: 3px solid var(--cor-preto) !important;
    transition: background-color 0.1s, color 0.1s;
    height: 100%;
}

.card:hover {
    background-color: var(--cor-preto);
    color: var(--cor-branco);
}

.card-title {
    text-transform: uppercase;
    font-weight: bold;
    font-size: 1.1rem;
}

.card-icon {
    width: 44px;
    height: 44px;
    border: 2px solid var(--cor-preto);
    background-color: var(--cor-preto);
    color: var(--cor-branco);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}

.card:hover .card-icon {
    background-color: var(--cor-branco);
    color: var(--cor-preto);
    border-color: var(--cor-branco);
}

.carousel-4d {
    border: 4px solid var(--cor-preto);
}

.carousel-4d .carousel-item {
    background-color: var(--cor-preto);
    color: var(--cor-branco);
    min-height: 320px;
}

.carousel-4d .carousel-item>.container {
    display: flex;
    align-items: center;
    min-height: 320px;
}

.carousel-4d .carousel-control-prev-icon,
.carousel-4d .carousel-control-next-icon {
    filter: invert(1);
}

.carousel-4d .carousel-indicators [data-bs-target] {
    background-color: var(--cor-branco);
    border: 1px solid var(--cor-preto);
}

.modal-content {
    border: 4px solid var(--cor-preto) !important;
}

.modal-header {
    border-bottom: 2px solid var(--cor-preto);
}

.modal-footer {
    border-top: 2px solid var(--cor-preto);
}

.form-label {
    font-weight: bold;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.form-control {
    border: 2px solid var(--cor-preto);
    font-family: inherit;
}

.form-control:focus {
    border-color: var(--cor-preto);
    box-shadow: 0 0 0 0.2rem rgba(0, 0, 0, 0.25);
    background-color: #f5f5f5;
}

.btn-primary {
    text-transform: uppercase;
    font-weight: bold;
    background-color: var(--cor-branco);
    color: var(--cor-preto);
    border-color: var(--cor-preto);
}

.btn-primary:hover {
    background-color: var(--cor-preto);
    color: var(--cor-branco);
    border-color: var(--cor-branco);
}

.list-group-item {
    border: none !important;
    border-bottom: 1px dashed var(--cor-preto) !important;
    display: flex;
    align-items: center;
    gap: 15px;
    background-color: transparent;
    padding: 15px 0;
}

.list-group-item:last-child {
    border-bottom: none !important;
}

.channel-icon {
    width: 40px;
    height: 40px;
    border: 2px solid var(--cor-preto);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.toast {
    border: 3px solid var(--cor-preto) !important;
    background-color: var(--cor-branco);
}

.toast-header {
    background-color: var(--cor-preto);
    color: var(--cor-branco);
    border-bottom: 2px solid var(--cor-preto);
}

.callout {
    border: 2px dashed var(--cor-preto);
    font-style: italic;
}

footer {
    background-color: var(--cor-branco);
    border-top: 4px solid var(--cor-preto);
    text-transform: uppercase;
    font-weight: bold;
    font-size: 14px;
}

@media (max-width: 767.98px) {

    .navbar-brand span {
        font-size: 18px;
    }

    .hero-logo {
        display: none;
    }

    .book-cover {
        margin: 0 auto 20px auto;
    }
}