.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    transition: all var(--transition-base);
}

/* Fundo com blur num pseudo-elemento: backdrop-filter no próprio .header
   vira containing block dos filhos position:fixed e prende o menu mobile. */
.header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: -1;
}

.header--scrolled {
    box-shadow: var(--shadow-lg);
}

.header--hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.header__logo {
    flex-shrink: 0;
    z-index: 1001;
}

.header__logo-link {
    display: block;
    line-height: 0;
}

.header__logo-img {
    height: 48px;
    width: auto;
    transition: opacity var(--transition-fast);
}

.header__logo-img:hover {
    opacity: 0.8;
}

.header__nav {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.header__menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
}

.header__menu-item {
    position: relative;
}

.header__menu-link {
    display: block;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: var(--color-white);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.header__menu-link:hover,
.header__menu-link:focus {
    color: var(--color-accent);
    background: rgba(255, 255, 255, 0.1);
}

.header__menu-link--active {
    color: var(--color-accent);
}

.header__menu-link--active::after {
    content: '';
    position: absolute;
    bottom: 0.375rem;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 2px;
}

.header__mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.header__mobile-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-white);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.header__mobile-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

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

.header__mobile-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

@media (max-width: 991px) {
    .header__mobile-toggle {
        display: flex;
    }

    .header__nav {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        max-width: 320px;
        background: var(--color-primary);
        padding: calc(var(--header-height) + var(--space-lg)) var(--space-lg) var(--space-lg);
        transform: translateX(100%);
        visibility: hidden;
        transition: transform var(--transition-base), visibility 0s linear var(--transition-base);
        overflow-y: auto;
        z-index: 1000;
    }

    .header__nav--open {
        transform: translateX(0);
        visibility: visible;
        box-shadow: var(--shadow-lg);
        transition: transform var(--transition-base);
    }

    .header__menu {
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
    }

    .header__menu-link {
        padding: 1rem 1.25rem;
        font-size: 1rem;
        text-align: left;
        border-radius: var(--radius-md);
        color: var(--color-white);
    }

    .header__menu-link:hover,
    .header__menu-link:focus {
        color: var(--color-accent);
        background: rgba(255, 255, 255, 0.1);
    }

    .header__menu-link--active {
        background: rgba(215, 170, 0, 0.12);
    }

    .header__menu-link--active::after {
        display: none;
    }

    .header__overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.6);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        z-index: 999;
    }

    .header__overlay--visible {
        opacity: 1;
        visibility: visible;
    }
}

@media (max-width: 575px) {
    .header__logo-img {
        height: 40px;
    }
}