/* ========================================================================
   _header.css
   Header shell, logo, icons, hamburger, main nav, mega-menu, mobile nav
   ======================================================================== */

/* ============ HEADER SHELL ============ */
#site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: #fff;
    border-bottom: 1px solid transparent;
    box-shadow: 0 6px 12px -4px rgba(0,0,0,.12);
    transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

    #site-header.is-scrolled,
    #site-header.is-compact {
        border-bottom-color: var(--gray-line);
    }

.header-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

.header-row {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    min-height: var(--header-h-top);
    transition: min-height var(--transition-speed) ease, padding var(--transition-speed) ease;
    padding: 14px 0;
}

.logo-block {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1;
    transition: transform var(--transition-speed) ease;
}

    .logo-block .wordmark {
        font-size: 28px;
        font-weight: 700;
        letter-spacing: .06em;
        display: flex;
        align-items: baseline;
        gap: 2px;
    }

        .logo-block .wordmark sup {
            font-size: 11px;
        }

    .logo-block .tagline {
        font-size: 9px;
        letter-spacing: .14em;
        color: var(--gray-mid);
        margin-top: 4px;
        white-space: nowrap;
        transition: opacity var(--transition-speed) ease, max-height var(--transition-speed) ease, margin var(--transition-speed) ease;
        overflow: hidden;
    }

    .logo-block .logo-img {
        display: block;
        width: 280px;
        transition: width var(--transition-speed) ease;
    }

.header-icons {
    display: flex;
    align-items: center;
    gap: 18px;
}

.icon-btn {
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

    .icon-btn svg {
        width: 19px;
        height: 19px;
        display: block;
    }

.header-cart-badge {
    position: absolute;
    top: 15px;
    right: -3px;
    min-width: 17px;
    height: 17px;
    padding: 0 4px;
    background: #001e60;
    color: #fff;
    font-size: 8px;
    font-weight: 700;
    line-height: 18px;
    text-align: center;
    border-radius: 50%;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 6px;
}

    .hamburger span {
        width: 22px;
        height: 2px;
        background: var(--black);
        display: block;
        transition: transform .2s ease, opacity .2s ease;
    }

    .hamburger.is-open span:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }

    .hamburger.is-open span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.is-open span:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }

/* ============ MAIN NAV (desktop) ============ */
.main-nav {
    transition: padding var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

    .main-nav > ul {
        display: flex;
        justify-content: center;
        gap: 16px;
        padding: 0 0 20px;
        flex-wrap: wrap;
    }

.nav-link {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 14px;
    font-weight: 540;
    letter-spacing: .03em;
    color: #5d5d5d;
    padding: 0px 0px;
    border-bottom: 1px solid transparent;
    white-space: nowrap;
}

    .nav-item.active > .nav-link,
    .nav-link:hover {
        color: var(--black);
        border-bottom-color: var(--black);
    }

.chevron {
    width: 10px;
    height: 10px;
    transition: transform .2s ease;
}

.nav-item:hover .chevron {
    transform: rotate(180deg);
}

.nav-item {
    position: relative;
}

/* ---------- COMPACT (deep-scroll) STATE : single inline row ---------- */
#site-header.is-compact .header-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--header-h-compact);
    padding-top: 10px;
    padding-bottom: 10px;
}

#site-header.is-compact .header-row {
    display: contents;
}

#site-header.is-compact .hamburger {
    order: 0;
}

#site-header.is-compact .logo-block {
    position: static;
    transform: none;
    order: 1;
}

    #site-header.is-compact .logo-block .wordmark {
        font-size: 20px;
    }

    #site-header.is-compact .logo-block .tagline {
        max-height: 0;
        opacity: 0;
        margin-top: 0;
    }

    #site-header.is-compact .logo-block .logo-img {
        width: 130px;
        height: 38.65px;
    }

#site-header.is-compact .header-icons {
    order: 3;
}

#site-header.is-compact .main-nav {
    order: 2;
    flex: 1;
    border-top: none;
    margin: 0 28px;
}

    #site-header.is-compact .main-nav > ul {
        justify-content: flex-start;
        padding: 0;
    }

/* ============ MEGA MENU (desktop) ============ */
.mega-menu {
    position: absolute;
    top: calc(100% + 14px);
    left: 50%;
    background: #fff;
    border: 1px solid var(--gray-line);
    box-shadow: 0 12px 32px rgba(0,0,0,.08);
    padding: 32px 40px;
    display: flex;
    gap: 56px;
    min-width: 640px;
    z-index: 20;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translate(-50%,6px);
    transition: opacity .16s ease, transform .16s ease, visibility .16s linear;
}

/* ========================================================================
   SKIN SCIENCE MEGA MENU — คอลัมน์ซ้าย (ลิงก์) + การ์ดรูปภาพขวา
   ======================================================================== */

.mega-menu--skin-science {
    display: flex;
    gap: 48px;
    min-width: 900px;
    padding: 32px 40px;
}

    .mega-menu--skin-science .mega-col--nav {
        flex-shrink: 0;
        min-width: 180px;
    }

        .mega-menu--skin-science .mega-col--nav h4 {
            font-size: 11px;
            letter-spacing: .1em;
            color: var(--gray-mid);
            margin: 0 0 14px;
            text-transform: uppercase;
            font-weight: 700;
        }

        .mega-menu--skin-science .mega-col--nav ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .mega-menu--skin-science .mega-col--nav a {
            font-size: 13.5px;
            color: var(--gray-dark);
        }

            .mega-menu--skin-science .mega-col--nav a:hover {
                color: var(--black);
                text-decoration: underline;
            }

    .mega-menu--skin-science .mega-col--cards {
        display: flex;
        gap: 24px;
        flex: 1;
    }

.mega-card {
    display: block;
    width: 220px;
    text-decoration: none !important;
}

.mega-card__img {
    width: 100%;
    height: 160px;
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 12px;
}

    .mega-card__img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }

.mega-card__label {
    font-size: 14px;
    font-weight: 700;
    color: var(--black);
}

/* Mobile — chevron หมุนตอนเปิดเมนู (touch ไม่มี hover ต้องพึ่ง force-open) */
@media (max-width: 1023px) {
    .nav-item.force-open .chevron {
        transform: rotate(180deg);
    }
}

/* SKIN SCIENCE MOBILE — แบบ accordion: header + ลิงก์ + การ์ดเลื่อน */
@media (max-width: 1023px) {
    .mega-menu--skin-science {
        display: flex;
        flex-direction: column;
        width: 100%;
        min-width: 0; /* ล้างค่า min-width: 900px ของเดสก์ท็อป */
        padding: 0 0 24px;
        gap: 0;
    }

        .mega-menu--skin-science .mega-col--nav {
            min-width: 0; /* ล้างค่า min-width: 180px ของเดสก์ท็อป */
            width: 100%;
        }

            .mega-menu--skin-science .mega-col--nav h4 {
                display: flex;
                align-items: center;
                justify-content: space-between;
                background: #f2f2f2;
                color: var(--black);
                font-size: 13px;
                font-weight: 700;
                letter-spacing: .04em;
                text-transform: uppercase;
                padding: 14px 24px;
                margin: 0 0 12px;
                cursor: pointer;
                user-select: none;
            }

                .mega-menu--skin-science .mega-col--nav h4::after {
                    content: '−';
                    font-size: 16px;
                    font-weight: 400;
                    color: var(--gray-mid);
                    transition: transform .15s ease;
                }

            /* ยุบ: ซ่อนลิสต์ลิงก์ใต้ h4 + เปลี่ยนเครื่องหมายเป็น + */
            .mega-menu--skin-science .mega-col--nav.is-collapsed ul {
                display: none;
            }

            .mega-menu--skin-science .mega-col--nav.is-collapsed h4::after {
                content: '+';
            }

            .mega-menu--skin-science .mega-col--nav ul {
                gap: 20px;
                padding: 0 24px;
                width: 100%;
            }

            .mega-menu--skin-science .mega-col--nav li {
                width: 100%;
            }

            .mega-menu--skin-science .mega-col--nav a {
                font-size: 15px;
                display: block;
                width: 100%;
                white-space: normal;
                word-break: break-word;
            }

        .mega-menu--skin-science .mega-col--cards {
            width: 100%;
            flex-wrap: nowrap;
            overflow-x: auto;
            gap: 16px;
            padding: 20px 24px 4px;
            margin-top: 16px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }

            .mega-menu--skin-science .mega-col--cards::-webkit-scrollbar {
                display: none;
            }

        .mega-menu--skin-science .mega-card {
            flex: 0 0 auto;
            width: 62%;
            scroll-snap-align: start;
        }

        .mega-menu--skin-science .mega-card__img {
            height: 200px;
        }

        .mega-scroll-track {
            height: 3px;
            background: var(--gray-line);
            border-radius: 2px;
            margin: 0 24px 4px;
            position: relative;
            overflow: hidden;
        }

    .mega-scroll-thumb {
        position: absolute;
        top: 0;
        left: 0;
        height: 100%;
        background: var(--black);
        border-radius: 2px;
        cursor: grab;
        touch-action: none; /* กัน browser แย่ง gesture ไปทำ scroll หน้าเว็บระหว่างลาก */
    }

        .mega-scroll-thumb.is-dragging {
            cursor: grabbing;
        }

    .mega-scroll-track {
        cursor: pointer;
    }
}


.mega-menu::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: -14px;
    height: 14px;
}

.nav-item:hover .mega-menu,
.nav-item.force-open .mega-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translate(-50%,0);
}

.mega-col h4 {
    font-size: 11px;
    letter-spacing: .1em;
    color: var(--gray-mid);
    margin: 0 0 14px;
    text-transform: uppercase;
}

.mega-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mega-col a {
    font-size: 13.5px;
    color: var(--gray-dark);
}

    .mega-col a:hover {
        color: var(--black);
        text-decoration: underline;
    }

.simple-dropdown {
    position: absolute;
    top: calc(100% + 14px);
    left: 50%;
    background: #fff;
    border: 1px solid var(--gray-line);
    box-shadow: 0 12px 32px rgba(0,0,0,.08);
    padding: 18px 22px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 200px;
    z-index: 20;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translate(-50%,6px);
    transition: opacity .16s ease, transform .16s ease, visibility .16s linear;
}

    .simple-dropdown::before {
        content: '';
        position: absolute;
        left: 0;
        right: 0;
        top: -14px;
        height: 14px;
    }

.nav-item:hover .simple-dropdown,
.nav-item.force-open .simple-dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translate(-50%,0);
}

.simple-dropdown a {
    font-size: 13.5px;
    color: var(--gray-dark);
    white-space: nowrap;
}

    .simple-dropdown a:hover {
        color: var(--black);
        text-decoration: underline;
    }

/* ============ MOBILE / TABLET ============ */
@media (max-width: 1023px) {
    .header-row {
        justify-content: space-between;
    }

    #site-header.is-compact .logo-block .tagline {
        max-height: 0;
        opacity: 0;
        margin-top: 0;
    }

    /* กันเนื้อหาลูกล้นออกนอกกรอบ off-canvas panel */
    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        height: 100dvh;
        width: min(84vw,340px);
        max-width: 100vw;
        background: #fff;
        transform: translateX(-100%);
        transition: transform var(--transition-speed) ease;
        overflow-x: hidden;
        overflow-y: auto;
        border-top: none;
        box-shadow: 4px 0 24px rgba(0,0,0,.12);
        padding-top: 70px;
    }

        .main-nav.is-open {
            transform: translateX(0);
        }

        .main-nav > ul {
            flex-direction: column;
            align-items: flex-start;
            gap: 0;
            padding: 8px 0;
        }

    .nav-item {
        width: 100%;
        border-bottom: 1px solid var(--gray-line);
    }

    .nav-link {
        padding: 16px 24px;
        width: 100%;
        justify-content: space-between;
        border-bottom: none;
    }

    .nav-item.active > .nav-link {
        border-bottom: none;
    }

    .mega-menu, .simple-dropdown {
        position: static;
        transform: none;
        box-shadow: none;
        border: none;
        min-width: 0;
        width: 100%;
        padding: 4px 24px 18px;
        display: none;
        flex-direction: column;
        gap: 24px;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transition: none;
    }
 
}
@media (max-width: 1023px) {
    #site-header .mega-menu,
    #site-header .simple-dropdown,
    #site-header .mega-menu--skin-science {
        position: static !important;
        left: auto !important;
        transform: none !important;
        width: 100% !important;
        min-width: 0 !important;
        max-width: 100% !important;
    }


    .nav-item:hover .mega-menu, .nav-item:hover .simple-dropdown {
        display: none;
    }

    .nav-item.force-open .mega-menu,
    .nav-item.force-open .simple-dropdown {
        display: flex;
    }

    .mega-col ul {
        gap: 12px;
    }

    .nav-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,.35);
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition-speed) ease;
        z-index: 999;
    }

        .nav-overlay.is-visible {
            opacity: 1;
            pointer-events: auto;
        }

    .desktop-only {
        display: none !important;
    }
}

@media (min-width: 1024px) {
    .mobile-only {
        display: none !important;
    }

    .nav-overlay {
        display: none;
    }
}

@media (min-width:600px) and (max-width:1023px) {
    .main-nav {
        width: 340px;
    }
}