.navbar {
    background: #fff;
    border-bottom: 1px solid var(--gray-100);
    height: 56px;
    display: flex;
    align-items: center;
    padding: 0 32px;
    gap: 0;
    position: relative;
    z-index: 100
}

.nav-cat-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    height: 56px;
    padding: 0 18px;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .03em;
    text-transform: uppercase;
    white-space: nowrap;
    position: relative
}

    .nav-cat-btn svg {
        transition: transform .2s
    }

    .nav-cat-btn.open svg {
        transform: rotate(180deg)
    }

.nav-links {
    display: flex;
    align-items: center;
    gap: 0;
    margin-left: 8px
}

@media (max-width: 480px) {
    .nav-links {
        margin-left: 0px;
        padding: 0px;
    }
    .navbar {
        padding: 0px;
    }
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 0 14px;
    font-size: 13px;
    color: var(--gray-600);
    height: 56px;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: color .2s,border-color .2s;
    white-space: nowrap
}

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

    .nav-link .chevron {
        opacity: .5;
        font-size: 10px
    }

.nav-hotline {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-900)
}

    .nav-hotline svg {
        color: var(--blue)
    }

.dropdown-wrap {
    position: absolute;
    top: 56px;
    left: 16%;
    z-index: 200;
    display: none;
    filter: drop-shadow(0 8px 24px rgba(0,0,0,.12))
}

    .dropdown-wrap.open {
        display: flex
    }

.dropdown-main {
    background: #fff;
    border: 1px solid var(--gray-100);
    border-top: none;
    width: 240px;
    padding: 8px 0
}

.cat-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 16px;
    font-size: 13px;
    color: var(--gray-700);
    cursor: pointer;
    transition: background .15s,color .15s;
    gap: 8px
}

    .cat-item:hover, .cat-item.active {
        background: var(--gray-50);
        color: var(--blue)
    }

    .cat-item .cat-icon {
        width: 28px;
        height: 28px;
        border-radius: 6px;
        background: var(--gray-50);
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0
    }

    .cat-item:hover .cat-icon, .cat-item.active .cat-icon {
        background: #e8f4fd
    }

    .cat-item .cat-icon svg {
        width: 14px;
        height: 14px;
        color: var(--gray-500)
    }

    .cat-item:hover .cat-icon svg, .cat-item.active .cat-icon svg {
        color: var(--blue)
    }

.cat-item-label {
    flex: 1
}

.cat-item-arrow {
    font-size: 11px;
    color: var(--gray-300)
}

.cat-item.active .cat-item-arrow {
    color: var(--blue)
}

.dropdown-sub {
    background: #fff;
    border: 1px solid var(--gray-100);
    border-top: none;
    border-left: none;
    width: 280px;
    display: none;
    flex-direction: column
}

    .dropdown-sub.open {
        display: flex
    }

.sub-header {
    padding: 10px 16px 6px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--gray-300);
    border-bottom: 1px solid var(--gray-100)
}

.brand-tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--gray-100)
}

.brand-tab {
    padding: 8px 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-500);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: color .15s,border-color .15s
}

    .brand-tab:hover {
        color: var(--gray-900)
    }

    .brand-tab.active {
        color: var(--blue);
        border-bottom-color: var(--blue)
    }

.sub-items {
    display: flex;
    flex-direction: column;
    padding: 4px 0
}

.sub-item {
    padding: 8px 16px;
    font-size: 13px;
    color: var(--gray-700);
    cursor: pointer;
    transition: background .15s,color .15s;
    display: flex;
    align-items: center;
    gap: 8px
}

    .sub-item:hover {
        background: var(--gray-50);
        color: var(--blue)
    }

    .sub-item.featured {
        color: var(--blue);
        font-weight: 600;
    }

    .sub-item .dot {
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--gray-300);
        flex-shrink: 0
    }

    .sub-item.featured .dot {
        background: var(--blue)
    }

a.sub-item {
    text-decoration: none;
    color: var(--gray-700);
}

.dropdown-promo {
    background: var(--gray-50);
    width: 180px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    border: 1px solid var(--gray-100);
    border-top: none;
    border-left: none
}

.promo-card {
    background: #fff;
    border: 1px solid var(--gray-100);
    border-radius: 6px;
    padding: 10px;
    cursor: pointer;
    transition: box-shadow .15s
}

    .promo-card:hover {
        box-shadow: 0 2px 10px rgba(0,0,0,.08)
    }

.promo-img {
    width: 100%;
    height: 70px;
    background: linear-gradient(135deg,#daeeff,#f0f8ff);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px
}

    .promo-img svg {
        width: 32px;
        height: 32px;
        color: #2DA5F3;
        opacity: .6
    }

.promo-badge {
    display: inline-block;
    background: #FFF0E5;
    color: #FA8232;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 2px;
    margin-bottom: 4px
}

.promo-name {
    font-size: 12px;
    color: var(--gray-700);
    line-height: 1.4;
    margin-bottom: 4px
}

.promo-price {
    font-size: 12px;
    font-weight: 700;
    color: var(--blue)
}

.demo-note {
    padding: 8px 32px;
    background: #fffbf0;
    border-bottom: 1px solid #fde68a;
    font-size: 12px;
    color: #92400e;
    display: flex;
    align-items: center;
    gap: 6px
}

/* ── Mobile hamburger toggle ── */
.nav-mobile-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-700, #475156);
    margin-left: auto;
    padding: 0;
    flex-shrink: 0;
}

    .nav-mobile-toggle svg {
        transition: transform .2s;
    }

    .nav-mobile-toggle.open svg {
        transform: rotate(90deg);
    }

/* ── Mobile overlay ── */
.mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .45);
    z-index: 1100;
}

    .mobile-overlay.open {
        display: block;
    }

/* ── Mobile drawer ── */
.mobile-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: 290px;
    max-width: 85vw;
    height: 100%;
    background: #fff;
    z-index: 1200;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform .28s cubic-bezier(.4, 0, .2, 1);
    box-shadow: 4px 0 24px rgba(0,0,0,.15);
}

    .mobile-drawer.open {
        transform: translateX(0);
    }

.mobile-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--blue-main, #0B9AF3);
    flex-shrink: 0;
}

.mobile-drawer-logo {
    font-family: 'Racing Sans One', cursive;
    font-size: 24px;
    color: #fff;
    letter-spacing: 2px;
}

.mobile-drawer-close {
    width: 32px;
    height: 32px;
    background: rgba(255,255,255,.18);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    transition: background .15s;
}

    .mobile-drawer-close:hover {
        background: rgba(255,255,255,.32);
    }

.mobile-drawer-hotline {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: #f0f8ff;
    font-size: 14px;
    font-weight: 600;
    color: var(--blue-main, #0B9AF3);
    border-bottom: 1px solid #e4e7e9;
    flex-shrink: 0;
}

.mobile-drawer-nav {
    display: flex;
    flex-direction: column;
    border-bottom: 1px solid #e4e7e9;
    flex-shrink: 0;
}

.mobile-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 13px 16px;
    font-size: 14px;
    color: #475156;
    border-bottom: 1px solid #f2f4f5;
    text-decoration: none;
    transition: background .15s, color .15s;
}

    .mobile-nav-item:last-child {
        border-bottom: none;
    }

    .mobile-nav-item:hover {
        background: #f2f4f5;
        color: var(--blue-main, #0B9AF3);
    }

    .mobile-nav-item svg {
        flex-shrink: 0;
        color: var(--blue-main, #0B9AF3);
    }

.mobile-cat-section {
    flex: 1;
    overflow-y: auto;
}

.mobile-cat-section-title {
    padding: 12px 16px 8px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: #adb7bc;
    background: #f9f9f9;
    border-bottom: 1px solid #e4e7e9;
    position: sticky;
    top: 0;
    z-index: 1;
}

.mobile-cat-group-name {
    padding: 10px 16px 6px;
    font-size: 12px;
    font-weight: 700;
    color: #191c1f;
    text-transform: uppercase;
    letter-spacing: .04em;
    background: #f9f9f9;
    border-top: 1px solid #e8edf3;
}

.mobile-cat-item {
    display: block;
    padding: 9px 16px 9px 28px;
    font-size: 13px;
    color: #5f6c72;
    border-bottom: 1px solid #f2f4f5;
    text-decoration: none;
    transition: background .12s, color .12s;
}

    .mobile-cat-item:hover {
        background: #f0f8ff;
        color: var(--blue-main, #0B9AF3);
    }

    .mobile-cat-item.featured {
        color: var(--blue-main, #0B9AF3);
        font-weight: 600;
    }

/* ── Responsive overrides ── */
@media (max-width: 960px) {
    .nav-mobile-toggle {
        display: flex;
    }

    /* dropdown full-width, top khớp với navbar height tại tablet (52px) */
    .dropdown-wrap {
        top: 52px;
        left: 0;
        right: 0;
        width: 100%;
    }

    .dropdown-main {
        width: 40%;
        min-width: 160px;
    }

    .dropdown-sub {
        width: 60%;
        min-width: 0;
    }

    .dropdown-promo {
        display: none;
    }
}

@media (max-width: 480px) {
    /* dropdown top khớp với navbar height tại mobile (44px) */
    .dropdown-wrap {
        top: 44px;
    }

    .dropdown-main {
        width: 45%;
        min-width: 0;
    }

    .dropdown-sub {
        width: 55%;
    }
}