.cabecalho-principal {
    position: fixed;
    inset: 0 0 auto;
    z-index: 100;
    background: rgb(6, 20, 38);
    border-bottom: 1px solid transparent;
    backdrop-filter: blur(18px);
    transition:
        border-color var(--transicao-padrao),
        box-shadow var(--transicao-padrao),
        background-color var(--transicao-padrao);
}

.cabecalho-principal.esta-reduzido {
    background: rgb(255 255 255 / 96%);
    border-bottom-color: var(--cor-cinza-700);
    box-shadow: 0 12px 30px rgba(248, 246, 246, 0.06);
}

.cabecalho-principal__conteudo {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 5.2rem;
    gap: 2rem;
}

.marca {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    color: var(--cor-dourada-500);
    font-weight: 850;
    letter-spacing: -0.02em;
}

.marca__simbolo {
    display: grid;
    place-items: center;
    width: 2.35rem;
    aspect-ratio: 1;
    color: var(--cor-azul-marinho-950);
    background: var(--cor-dourada-400);
    border-radius: 0.45rem 0.9rem 0.45rem 0.9rem;
    font-family: var(--fonte-titulo);
    font-size: 1.25rem;
    font-weight: 700;
}

.marca__nome {
    font-size: 1.18rem;
}

.marca__nome span {
    color: var(--cor-dourada-500);
}

.navegacao-principal {
    display: flex;
    align-items: center;
    gap: clamp(0.85rem, 2vw, 1.6rem);
}

.navegacao-principal__link {
    position: relative;
    color: var(--cor-dourada-500);
    font-size: 0.82rem;
    font-weight: 700;
}

.navegacao-principal__link::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: -0.55rem;
    left: 0;
    height: 2px;
    background: var(--cor-dourada-500);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transicao-padrao);
}

.navegacao-principal__link:hover,
.navegacao-principal__link.esta-ativo {
    color: var(--cor-dourada-400);
}

.navegacao-principal__link:hover::after,
.navegacao-principal__link.esta-ativo::after {
    transform: scaleX(1);
    transform-origin: left;
}

.botao-menu {
    display: none;
    width: 2.8rem;
    height: 2.8rem;
    padding: 0.68rem;
    background: var(--cor-cinza-50);
    border: 1px solid var(--cor-cinza-200);
    border-radius: 50%;
}

.botao-menu span {
    display: block;
    width: 100%;
    height: 2px;
    margin-block: 0.25rem;
    background: var(--cor-azul-marinho-900);
    transition: transform var(--transicao-padrao), opacity var(--transicao-padrao);
}

@media (max-width: 980px) {
    .botao-menu {
        display: block;
    }

    .navegacao-principal {
        position: fixed;
        top: 5.2rem;
        right: var(--espacamento-lateral);
        left: var(--espacamento-lateral);
        display: grid;
        align-items: stretch;
        gap: 0;
        padding: 1rem;
        background: var(--cor-branca);
        border: 1px solid var(--cor-cinza-100);
        border-radius: var(--raio-grande);
        box-shadow: var(--sombra-media);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-12px);
        transition:
            opacity var(--transicao-padrao),
            visibility var(--transicao-padrao),
            transform var(--transicao-padrao);
    }

    .navegacao-principal.esta-aberta {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .navegacao-principal__link {
        padding: 0.9rem 0.75rem;
        border-bottom: 1px solid var(--cor-cinza-100);
    }

    .navegacao-principal__link::after {
        display: none;
    }

    .navegacao-principal .botao {
        width: 100%;
        margin-top: 1rem;
    }

    .botao-menu[aria-expanded="true"] span:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }

    .botao-menu[aria-expanded="true"] span:nth-child(2) {
        opacity: 0;
    }

    .botao-menu[aria-expanded="true"] span:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }
}