.header {
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 9999;
    background-color: var(--white-color);
    box-shadow: 0 1px 1px rgba(83, 70, 70, 0.1);
}

.header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header__brand {
    display: block;
}

.header__logo {
    display: inline-block;
}

.header__logo img {
    max-width: 300px;
    height: auto;
    display: block;
}

.nav-primary__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 30px;
    align-items: flex-end;
}

.nav-primary__link {
    color: var(--text-color);
    font-size: 1.4rem;
    font-weight: 600;
}

.nav-primary__link {
    display: inline-flex;
    flex-direction: column;
    line-height: 1.8rem;
    align-items: flex-start;
}

.nav-primary__line--bottom {
    align-self: center;
}

.nav-primary__link:hover,
.nav-primary__link:focus {
    color: var(--primary-color);
}

.nav-primary__link.active,
.nav-primary__item.current-menu-item>.nav-primary__link,
.nav-primary__item.current_page_item>.nav-primary__link {
    color: var(--text-color);
}

.nav-primary__item.current-menu-item,
.nav-primary__item.current_page_item {
    position: relative;
}

.nav-primary__item.current-menu-item::after,
.nav-primary__item.current_page_item::after {
    content: '';
    position: absolute;
    bottom: -18px;
    left: 0;
    right: 0;
    height: 4px;
    background-color: var(--primary-color);
}

.nav-primary__link.active .nav-primary__line,
.nav-primary__item.current-menu-item .nav-primary__line,
.nav-primary__item.current_page_item .nav-primary__line {
    color: inherit;
}

/* Ensure any SVG used inside the toggle has a sensible default size and color
   (the button itself is only shown on small screens via the media query). */
.nav-toggle {
    color: var(--text-color);
    display: none;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
}

.nav-toggle svg {
    width: 24px;
    height: 24px;
    display: block;
}

.nav-toggle svg path,
.nav-toggle svg rect {
    fill: currentColor;
}

/* If there are two inline SVGs inside the toggle, hide the second by default
   and swap visibility when expanded. This lets you keep two SVGs in markup
   without extra classes. */
.nav-toggle svg {
    display: block;
}

.nav-toggle svg:nth-of-type(2) {
    display: none;
}

.nav-toggle[aria-expanded="true"] svg:nth-of-type(1) {
    display: none;
}

.nav-toggle[aria-expanded="true"] svg:nth-of-type(2) {
    display: block;
}

/* Responsive behaviour: hide the desktop list and show hamburger on small screens */
@media screen and (max-width: 768px) {
    .header {
        padding: 10px;
    }

    .header__brand img {
        max-width: 180px;
    }

    .nav-primary {
        display: none;
    }

    .nav-toggle {
        display: block;
    }

    /* Ẩn border active trên mobile */
    .nav-primary__item.current-menu-item::after,
    .nav-primary__item.current_page_item::after {
        display: none;
    }

    /* When the nav has .is-open (toggled by JS), show the mobile panel */
    .nav-primary.is-open {
        display: block;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-color);
        z-index: 998;
    }

    .nav-primary.is-open .nav-primary__list {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }
    
    .nav-primary.is-open .nav-primary__link {
        display: block;
        padding: 12px 20px;
        font-size: 1.2rem;
        border-bottom: 2px solid var(--white-color);
    }
}