.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 30;
    transition: background var(--transition), padding var(--transition), backdrop-filter var(--transition);
}

.site-header.is-scrolled {
    padding: 0;
    background: rgba(245, 247, 250, 0.92);
    backdrop-filter: blur(16px);
    box-shadow: 0 8px 30px rgba(10, 18, 26, 0.12);
}

.header-shell {
    width: min(calc(100% - 38px), 1820px);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    padding: 14px 18px;
    transition: width var(--transition), padding var(--transition), background var(--transition), border-color var(--transition);
}


.site-branding {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
}

.site-branding img {
    width: auto;
    height: 42px;
    max-width: 250px;
    object-fit: contain;
    object-position: left center;
    filter: brightness(0) invert(1);
    transition: filter var(--transition), height var(--transition);
}

.site-header.is-scrolled .site-branding img {
    filter: none;
    height: 46px;
}

.header-nav {
    margin-left: auto;
}

.header-menu {
    display: flex;
    align-items: center;
    gap: 46px;
    list-style: none;
}

.header-menu>li {
    position: relative;
}

.header-menu a {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 0;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
    color: #fff;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.site-header.is-scrolled .header-menu a,
.site-header.is-scrolled .header-icon-button {
    color: #43415c;
}

.header-menu a:hover,
.header-menu a:focus-visible {
    color: rgba(255, 255, 255, 0.82);
}

.site-header.is-scrolled .header-menu a:hover,
.site-header.is-scrolled .header-menu a:focus-visible {
    color: #26243c;
}

.header-menu .current-menu-item>a,
.header-menu .current-menu-ancestor>a,
.header-menu .current-menu-parent>a,
.header-menu a.is-current {
    padding: 0 24px;
    border: 3px solid rgba(255, 255, 255, 0.92);
    border-radius: 999px;
}

.site-header.is-scrolled .header-menu .current-menu-item>a,
.site-header.is-scrolled .header-menu .current-menu-ancestor>a,
.site-header.is-scrolled .header-menu .current-menu-parent>a,
.site-header.is-scrolled .header-menu a.is-current {
    border-color: #4b4865;
}

.header-menu .sub-menu {
    position: absolute;
    top: calc(100% + 20px);
    left: 50%;
    z-index: 35;
    min-width: 250px;
    padding: 0;
    list-style: none;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 20px 40px rgba(18, 25, 34, 0.18);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(10px);
    transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
}

.header-menu li:hover>.sub-menu,
.header-menu li:focus-within>.sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.header-menu .sub-menu li {
    border-top: 1px solid rgba(67, 65, 92, 0.12);
}

.header-menu .sub-menu li:first-child {
    border-top: 0;
}

.header-menu .sub-menu a {
    display: flex;
    min-height: 0;
    padding: 26px 44px;
    color: #637590;
    font-size: 14px;
    font-weight: 500;
    border: 0;
    border-radius: 0;
}

.header-menu .sub-menu .current-menu-item>a,
.header-menu .sub-menu a:hover,
.header-menu .sub-menu a:focus-visible {
    color: #2f4160;
    box-shadow: inset 4px 0 0 #19d6f6;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0;
}

.header-icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: #fff;
    transition: background var(--transition), transform var(--transition);
}

.header-icon-button:hover,
.header-icon-button:focus-visible {
    transform: scale(1.08);
}

.header-icon-button svg {
    width: 30px;
    height: 30px;
    fill: currentColor;
}

.header-toggle {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}

.header-toggle span {
    width: 18px;
    height: 2px;
    background: #fff;
    border-radius: 999px;
}

.site-header.is-scrolled .header-toggle span {
    background: #43415c;
}

body.search-overlay-open {
    overflow: hidden;
}

.site-header.is-search-open {
    background: transparent;
    backdrop-filter: none;
    box-shadow: none;
}

.site-header.is-search-open .site-branding img {
    filter: brightness(0) invert(1);
}

.site-header.is-search-open .header-menu a,
.site-header.is-search-open .header-icon-button {
    color: #fff;
}

.site-header.is-search-open .header-toggle span {
    background: #fff;
}

.site-header.is-search-open .header-menu .current-menu-item>a,
.site-header.is-search-open .header-menu .current-menu-ancestor>a,
.site-header.is-search-open .header-menu .current-menu-parent>a,
.site-header.is-search-open .header-menu a.is-current {
    border-color: rgba(255, 255, 255, 0.92);
}

.site-search-overlay {
    position: fixed;
    inset: 0;
    z-index: 28;
    background: rgba(6, 9, 13, 0.96);
    opacity: 0;
    visibility: hidden;
    transform: translateY(100%);
    transition: opacity 0.32s ease, visibility 0.32s ease, transform 0.4s ease;
}

.site-search-overlay.is-active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.site-search-overlay__inner {
    width: min(calc(100% - 40px), 1840px);
    height: 100%;
    margin: 0 auto;
    padding: calc(var(--thegem-search-header-offset, 84px) + 28px) 0 44px;
    overflow-y: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.site-search-overlay__inner::-webkit-scrollbar {
    width: 0;
    height: 0;
}

.site-search-overlay__top {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.site-search-form {
    width: 100%;
}

.site-search-form__input {
    width: 100%;
    height: 82px;
    padding: 0;
    border: 0;
    background: transparent;
    color: #fff;
    font-size: clamp(2rem, 3.6vw, 4.4rem);
    font-weight: 400;
    line-height: 1.1;
    text-align: center;
    outline: none;
}

.site-search-form__input::placeholder {
    color: rgba(255, 255, 255, 0.84);
}

.site-search-form__input::-webkit-search-decoration,
.site-search-form__input::-webkit-search-cancel-button,
.site-search-form__input::-webkit-search-results-button,
.site-search-form__input::-webkit-search-results-decoration {
    display: none;
}

.site-search-overlay__close {
    position: relative;
    width: 50px;
    height: 50px;
    flex: 0 0 auto;
}

.site-search-overlay__close span {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 34px;
    height: 2px;
    background: #fff;
    border-radius: 999px;
}

.site-search-overlay__close span:first-child {
    transform: translate(-50%, -50%) rotate(45deg);
}

.site-search-overlay__close span:last-child {
    transform: translate(-50%, -50%) rotate(-45deg);
}

.site-search-suggestions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 28px;
}

.site-search-suggestions>span {
    color: rgba(255, 255, 255, 0.58);
    font-size: 14px;
}

.site-search-suggestion {
    min-height: 38px;
    padding: 0 18px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.84);
    font-size: 13px;
    transition: background var(--transition), color var(--transition), transform var(--transition);
}

.site-search-suggestion:hover,
.site-search-suggestion:focus-visible {
    background: var(--color-accent);
    color: #081117;
    transform: translateY(-1px);
}

.site-search-feedback {
    margin-top: 24px;
    text-align: center;
    color: rgba(255, 255, 255, 0.68);
    font-size: 15px;
}

.site-search-results {
    margin-top: 36px;
}

.site-search-results .post-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.site-search-more-wrap {
    display: flex;
    justify-content: center;
    margin-top: 32px;
    padding-bottom: 28px;
}

.site-search-more {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 28px;
    border-radius: 999px;
    background: var(--color-accent);
    color: #081117;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

@media (max-width: 1100px) {
    .header-shell {
        width: min(calc(100% - 20px), 1000px);
        gap: 14px;
        padding: 12px 16px;
    }

    .header-toggle {
        display: inline-flex;
        order: 3;
    }

    .header-nav {
        position: absolute;
        top: calc(100% + 12px);
        right: 12px;
        left: 12px;
        padding: 20px;
        background: rgba(10, 14, 20, 0.96);
        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: var(--shadow-soft);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateY(-8px);
        transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
    }

    .site-header.is-open .header-nav {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateY(0);
    }

    .header-menu {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
    }

    .header-menu>li {
        width: 100%;
    }

    .header-menu a {
        min-height: 30px;
        font-size: 13px;
        color: #fff;
    }

    .site-header.is-scrolled .header-menu a {
        color: #fff;
    }

    .header-menu .sub-menu {
        position: static;
        min-width: 0;
        width: 100%;
        margin-top: 10px;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        box-shadow: none;
        background: rgba(255, 255, 255, 0.06);
    }

    .site-header.is-open .header-menu li:hover>.sub-menu,
    .site-header.is-open .header-menu li:focus-within>.sub-menu,
    .site-header.is-open .header-menu .current-menu-parent>.sub-menu,
    .site-header.is-open .header-menu .current-menu-ancestor>.sub-menu {
        display: block;
    }

    .header-menu .sub-menu a {
        padding: 12px 16px;
        font-size: 13px;
        color: #fff;
    }

    .site-header.is-scrolled .header-menu .sub-menu a {
        color: #43415c;
    }

    .site-branding img {
        height: 34px;
        max-width: 190px;
    }

    .header-actions {
        margin-left: auto;
    }

    .site-search-overlay__inner {
        width: min(calc(100% - 24px), 960px);
        padding-top: calc(var(--thegem-search-header-offset, 84px) + 20px);
    }

    .site-search-overlay__top {
        grid-template-columns: minmax(0, 1fr) 46px;
        gap: 14px;
        padding-bottom: 18px;
    }

    .site-search-form__input {
        height: 64px;
        font-size: 2rem;
        text-align: left;
    }

    .site-search-results .post-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .site-branding span {
        display: none;
    }

    .header-actions {
        display: flex;
        order: 2;
        margin-left: auto;
    }

    .header-toggle {
        order: 3;
    }

    .header-icon-button {
        width: 38px;
        height: 38px;
    }

    .header-icon-button svg {
        width: 24px;
        height: 24px;
    }

    .site-search-overlay__inner {
        width: calc(100% - 20px);
        padding-bottom: 28px;
    }

    .site-search-form__input {
        font-size: 1.45rem;
        height: 56px;
    }

    .site-search-suggestions {
        justify-content: flex-start;
    }

    .site-search-feedback {
        text-align: left;
    }

    .site-search-results .post-grid {
        grid-template-columns: 1fr;
    }
}

/* Search preview cards: dùng <p> thay <h3> để đúng thứ tự heading SEO.
   Style giữ nguyên y hệt .travel-card h3 gốc. */
.site-search-results .travel-card p,
.site-search-results .travel-card-frame p {
    margin-top: 10px;
    font-size: 17px;
    font-weight: 600;
    line-height: 1.35;
    transition: color var(--transition);
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
    min-height: calc(1.35em * 2);
    margin-bottom: 0;
}

.site-search-results .travel-card:hover p,
.site-search-results .travel-card-frame:hover p {
    color: var(--color-accent);
}