.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: #fff;
    border-bottom: 1px solid var(--line);
}

/* Chừa chỗ cho header cố định khi nhảy tới các mục */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 96px;
}

@media (max-width: 1100px) {
    html {
        scroll-padding-top: 150px;
    }
}

@media (max-width: 666px) {
    html {
        scroll-padding-top: 200px;
    }
}

.site-header__inner {
    display: flex;
    gap: 12px 36px;
    align-items: center;
    min-height: 84px;
}

/* Desktop: một hàng duy nhất; chỉ ô tìm kiếm co lại khi thiếu chỗ */
.site-header__logo,
.site-header__lang {
    flex-shrink: 0;
}

.site-header__logo img {
    height: 52px;
    width: auto;
    display: block;
}

.site-header__nav {
    display: flex;
    align-items: center;
    gap: 8px 18px;
    flex: 1;
}

/* Không tự xuống dòng; chỉ ngắt tại "\n" khai báo trong SiteData.NavLinks */
.site-header__nav a {
    display: flex;
    align-items: center;
    white-space: pre;
    padding: 12px 4px;
    font-weight: 500;
    font-size: 15px;
    line-height: 1.25;
    text-align: center;
    color: var(--navy);
}

.site-header__nav a:hover {
    color: var(--orange);
}

/* Mục nổi bật (Sản phẩm, Liên hệ): cùng kiểu với số hotline ở footer */
.site-header__nav a.is-highlight {
    padding: 8px 16px;
    border-radius: 999px;
    background: var(--navy);
    color: #fff;
    font-weight: 700;
}

.site-header__nav a.is-highlight:hover {
    background: var(--orange);
    color: #fff;
}

.site-header__search {
    display: flex;
    align-items: center;
    gap: 8px;
    border: 2px solid var(--navy);
    border-radius: 6px;
    padding: 0 6px 0 14px;
    min-height: 44px;
    min-width: 0;
    background: #fff;
    position: relative;
}

.site-header__search input {
    border: 0;
    outline: 0;
    font: inherit;
    font-size: 14px;
    width: 200px;
    min-width: 60px;
    background: transparent;
}

.site-header__search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--navy);
    border: 0;
    border-radius: 4px;
    padding: 0;
    cursor: pointer;
}

.site-header__search-btn:hover {
    background: var(--orange);
}

/* Danh sách gợi ý tìm kiếm */
.site-header__results {
    position: absolute;
    top: calc(100% + 6px);
    right: -2px;
    width: max(100% + 4px, 280px);
    max-width: calc(100vw - 32px);
    margin: 0;
    padding: 6px 0;
    list-style: none;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 6px;
    box-shadow: 0 8px 24px rgba(15, 43, 70, 0.12);
    z-index: 10;
}

.site-header__results[hidden] {
    display: none;
}

.site-header__results a {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 10px 14px;
    color: var(--text);
}

.site-header__results strong {
    font-size: 14px;
    font-weight: 600;
    color: var(--navy);
}

.site-header__results span {
    font-size: 12px;
    color: var(--text-soft);
}

.site-header__results a:hover,
.site-header__results [aria-selected="true"] a {
    background: var(--bg-light);
}

.site-header__results a:hover strong,
.site-header__results [aria-selected="true"] strong {
    color: var(--orange);
}

.site-header__results-empty {
    padding: 10px 14px;
    font-size: 14px;
    color: var(--text-soft);
}

.site-header__lang {
    display: flex;
    align-items: center;
    gap: 8px;
    border: 0;
    background: transparent;
    font: inherit;
    font-size: 14px;
    font-weight: 600;
    color: var(--navy);
    min-height: 44px;
    cursor: pointer;
    text-decoration: none;
}

.site-header__switch {
    display: flex;
    align-items: center;
    width: 44px;
    height: 24px;
    border: 2px solid var(--navy);
    border-radius: 12px;
    padding: 0 2px;
}

.site-header__lang.is-en .site-header__switch {
    justify-content: flex-end;
}

.site-header__knob {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--orange);
}

/* Laptop nhỏ: thu hẹp khoảng cách */
@media (max-width: 1199px) {
    .site-header__inner {
        gap: 12px 24px;
    }

    .site-header__nav {
        gap: 8px 14px;
    }
}

/* Tablet: logo + tìm kiếm + ngôn ngữ ở hàng trên, menu xuống hàng dưới */
@media (max-width: 1100px) {
    .site-header__inner {
        flex-wrap: wrap;
        padding-block: 12px;
        min-height: 0;
    }

    .site-header__logo {
        margin-right: auto;
    }

    .site-header__nav {
        flex-basis: 100%;
        order: 3;
        justify-content: center;
        border-top: 1px solid var(--line);
        padding-top: 4px;
    }
}

/* Điện thoại: tìm kiếm chiếm hết một hàng, menu chia đều */
@media (max-width: 666px) {
    .site-header__inner {
        gap: 8px 12px;
    }

    .site-header__logo img {
        height: 42px;
    }

    .site-header__search {
        flex-basis: 100%;
        order: 4;
        min-height: 42px;
    }

    .site-header__search input {
        flex: 1;
        width: auto;
        min-width: 0;
    }

    .site-header__nav {
        display: grid;
        grid-template-columns: repeat(5, auto);
        justify-content: space-between;
        gap: 0 8px;
    }

    .site-header__nav a {
        justify-content: center;
        padding: 8px 2px;
        font-size: 14px;
    }

    .site-header__nav a.is-highlight {
        padding: 6px 10px;
        align-self: center;
    }
}

/* Điện thoại nhỏ (≤ 380px) */
@media (max-width: 380px) {
    .site-header__logo img {
        height: 36px;
    }

    .site-header__nav a {
        font-size: 13px;
    }

    .site-header__lang {
        font-size: 13px;
        gap: 6px;
    }
}

/* Nút menu: chỉ hiện trên điện thoại nhỏ */
.site-header__toggle {
    display: none;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 2px solid var(--navy);
    border-radius: 6px;
    background: #fff;
    color: var(--navy);
    cursor: pointer;
}

.site-header__toggle:hover,
.site-header.is-menu-open .site-header__toggle {
    background: var(--navy);
    color: #fff;
}

/* Điện thoại nhỏ (≤ 442px): danh mục gom vào nút menu */
@media (max-width: 442px) {
    html {
        scroll-padding-top: 150px;
    }

    .site-header__toggle {
        display: flex;
    }

    .site-header__nav {
        display: none;
    }

    .site-header.is-menu-open .site-header__nav {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding-block: 4px;
    }

    .site-header__nav a {
        justify-content: flex-start;
        white-space: normal;
        text-align: left;
        padding: 12px 4px;
        font-size: 15px;
    }

    .site-header__nav a + a {
        border-top: 1px solid var(--line);
    }

    .site-header__nav a.is-highlight {
        align-self: flex-start;
        margin-block: 6px;
        padding: 8px 16px;
    }

    .site-header__nav a.is-highlight,
    .site-header__nav a + a.is-highlight,
    .site-header__nav a.is-highlight + a {
        border-top: 0;
    }
}