/* ==========================================================================
   Header: topbar + thanh logo/tìm kiếm/hotline + thanh menu
   ========================================================================== */
.topbar {
    background: var(--color-topbar);
    font-size: 12.5px;
    color: var(--color-text);
}

.topbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: var(--topbar-height);
}

.topbar__item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.topbar__item .icon {
    font-size: 16px;
    color: var(--color-primary-700);
}

.topbar__item span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Thanh chính */
.site-header {
    position: relative;
    z-index: 30;
    background: var(--color-white);
}

.site-header__main {
    display: grid;
    grid-template-columns: 1fr minmax(0, 500px) 1fr;
    align-items: center;
    gap: 32px;
    min-height: var(--header-height);
}

.site-logo {
    display: inline-flex;
    justify-self: start;
}

.site-logo img {
    width: auto;
    height: 66px;
}

.header-search {
    position: relative;
    display: flex;
    width: 100%;
    height: 40px;
}

.header-search__input {
    flex: 1;
    min-width: 0;
    height: 100%;
    padding: 0 16px;
    font-size: 13.5px;
    border: 1px solid var(--color-border-strong);
    border-right: 0;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    background: var(--color-white);
}

.header-search__input::placeholder {
    color: #8a949c;
}

.header-search__input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.header-search__btn {
    display: grid;
    place-items: center;
    width: 48px;
    height: 100%;
    color: var(--color-white);
    background: var(--color-primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    transition: background-color var(--transition);
}

.header-search__btn:hover {
    background: var(--color-primary-700);
}

.header-search__btn .icon {
    font-size: 20px;
}

/* Gợi ý tìm kiếm (AJAX) */
.header-search__results {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    z-index: 40;
    max-height: 70vh;
    overflow-y: auto;
    background: var(--color-white);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
}

.header-search__list {
    list-style: none;
    margin: 0;
    padding: 6px;
}

.header-search__link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    border-radius: var(--radius-sm);
    color: inherit;
}

.header-search__link:hover,
.header-search__link:focus {
    background: var(--color-mint-50);
}

.header-search__thumb {
    flex: none;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--color-mint-50);
}

.header-search__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.header-search__info {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.header-search__name {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.header-search__type {
    font-size: 11.5px;
    color: var(--color-muted);
}

.header-search__all {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 10px 14px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary-700);
    border-top: 1px solid var(--color-border);
}

.header-search__all .icon {
    width: 16px;
    height: 16px;
    font-size: 16px;
}

.header-search__status,
.header-search__empty {
    margin: 0;
    padding: 14px;
    font-size: 13px;
    color: var(--color-muted);
    text-align: center;
}

.header-contact {
    display: flex;
    align-items: center;
    gap: 14px;
    justify-self: end;
}

.header-hotline {
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.header-zalo {
    display: grid;
    flex-shrink: 0;
    place-items: center;
    width: 42px;
    height: 42px;
    background: var(--color-zalo);
    border-radius: 50%;
    box-shadow: 0 6px 14px rgba(47, 135, 240, 0.25);
    transition: background-color var(--transition), transform var(--transition);
}

.header-zalo:hover {
    background: #1f74da;
    transform: translateY(-1px);
}

.header-zalo svg {
    width: 32px;
    height: 21px;
}

.header-hotline__icon {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    color: var(--color-white);
    background: var(--color-orange);
    border-radius: 50%;
}

.header-hotline__icon .icon {
    font-size: 20px;
}

.header-hotline__text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.header-hotline__label {
    font-size: 13px;
    color: var(--color-text);
}

.header-hotline__number {
    font-size: 21.5px;
    font-weight: 700;
    color: var(--color-orange);
    letter-spacing: 0.01em;
}

.header-hotline:hover .header-hotline__number {
    color: var(--color-orange-600);
}

.menu-toggle {
    display: none;
}

/* Thanh menu */
.site-navigation {
    background: var(--color-primary);
}

.site-navigation__inner {
    display: flex;
    justify-content: center;
}

.menu {
    display: flex;
    align-items: stretch;
    justify-content: center;
}

.menu__item {
    position: relative;
}

.menu__link {
    display: flex;
    align-items: center;
    gap: 6px;
    height: var(--nav-height);
    padding: 0 34px;
    font-size: var(--text-nav);
    font-weight: 600;
    color: var(--color-white);
    border-radius: var(--radius-pill);
    white-space: nowrap;
}

.menu__link .icon {
    font-size: 14px;
    transition: transform var(--transition);
}

.menu__link:hover,
.menu__item:focus-within > .menu__link {
    background: rgba(255, 255, 255, 0.1);
}

.menu__link.is-active {
    background: rgba(255, 255, 255, 0.16);
}

.submenu {
    position: absolute;
    top: 100%;
    left: 50%;
    min-width: 230px;
    padding: 8px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translate(-50%, 6px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.menu__item:hover > .submenu,
.menu__item:focus-within > .submenu,
.menu__item.is-open > .submenu {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
}

.menu__item:hover > .menu__link .icon,
.menu__item.is-open > .menu__link .icon {
    transform: rotate(180deg);
}

.submenu a {
    display: block;
    padding: 9px 14px;
    font-size: 14.5px;
    font-weight: 500;
    color: var(--color-heading);
    border-radius: var(--radius-sm);
}

.submenu a:hover {
    color: var(--color-primary-700);
    background: var(--color-mint-50);
}

.mobile-menu-overlay {
    display: none;
}