/* ============================================
   ABPack.vn — Header & Navigation
   Modern industrial design with trust signals
   ============================================ */

/* --- Top Bar --- */
.html_topbar_left {
    font-size: var(--text-sm) !important;
    font-weight: 400;
    line-height: 31px;
    text-align: left;
    color: rgba(255,255,255,0.9);
}

.header-top {
    transition: background-color var(--transition-base);
}

/* --- Main Header --- */
.header-main {
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base), background-color var(--transition-base);
}

.header-main .header-nav-main {
    justify-content: center;
}

/* --- Sticky Header Enhancement --- */
.stuck .header-main {
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background-color: rgba(255,255,255,0.97) !important;
}

/* --- Navigation Items --- */
ul.header-nav.nav-uppercase > li.menu-item {
    margin: 0 20px;
}

.nav.header-nav > li > a {
    padding-top: 0px;
    padding-bottom: 0px;
    position: relative;
}

/* Active/Hover underline effect */
ul.header-nav.nav-uppercase > li.menu-item > a {
    text-transform: uppercase;
    font-size: 15px;
    font-weight: 700;
    text-align: left;
    letter-spacing: 0.02em;
    color: var(--color-text-primary);
    transition: color var(--transition-fast);
    position: relative;
}

ul.header-nav.nav-uppercase > li.menu-item > a::before {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-full);
    transition: width var(--transition-base), left var(--transition-base);
}

ul.header-nav.nav-uppercase > li.menu-item > a:hover::before,
ul.header-nav.nav-uppercase > li.menu-item.active > a::before,
ul.header-nav.nav-uppercase > li.menu-item.current-menu-item > a::before {
    width: 100%;
    left: 0;
}

ul.header-nav.nav-uppercase > li.menu-item > a:hover {
    color: var(--color-primary);
}

/* Divider between menu items */
ul.header-nav.nav-uppercase > li.menu-item > a:after {
    border-left: 1px solid var(--color-border);
    height: 20px;
    left: -20px;
    margin-top: 0;
    position: absolute;
    top: auto;
    width: 1px;
    opacity: 0.6;
}

/* --- Header Buttons (Search, Cart) --- */
.header-nav-main .header-button a.icon {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    color: var(--color-primary);
    margin: 0;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.header-nav-main .header-button a.icon:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.header-nav-main .header-button a.icon i {
    font-size: 18px;
    top: 0;
}

/* --- Dropdown Menu --- */
.nav-dropdown-has-border .nav-dropdown {
    border: none !important;
    box-shadow: var(--shadow-xl);
    border-radius: var(--radius-lg);
    overflow: hidden;
    animation: dropdownReveal var(--transition-base) ease-out;
}

@keyframes dropdownReveal {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header-nav-main .nav-dropdown > li.nav-dropdown-col {
    width: 25%;
}

.nav-dropdown-has-border .nav-dropdown {
    border: none;
    padding: var(--space-3);
    min-width: 260px;
    background: var(--color-bg-primary);
}

.nav-dropdown li {
    font-size: var(--text-sm);
}

.nav-dropdown > li.nav-dropdown-col {
    display: block;
    width: 100%;
    border-right: 0;
}

/* Dropdown link styles */
.nav-column > li > a,
.nav-dropdown > li > a,
.nav-vertical-fly-out > li > a,
.nav > li > a {
    color: var(--color-text-primary);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-dropdown-default .nav-column li > a,
.nav-dropdown.nav-dropdown-default > li > a {
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    margin: 2px 0;
}

.nav-dropdown-default > li:hover > a,
.nav-dropdown .nav-dropdown-col > ul li:hover > a {
    color: var(--color-primary);
    background-color: var(--color-primary-50);
}

.nav-dropdown .menu-item-has-children > a {
    font-size: 15px !important;
    font-weight: 600 !important;
    color: var(--color-text-primary);
}

.nav-dropdown .nav-dropdown-col > a,
.nav-dropdown li a {
    font-weight: 500;
    text-transform: none;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.nav-dropdown li a:hover {
    padding-left: calc(var(--space-3) + 4px);
}

.nav-dropdown .nav-dropdown-col > ul li a {
    padding: var(--space-2) 0;
    text-transform: none;
    color: var(--color-text-secondary);
}

.nav-dropdown-default > li.menu-item-has-children > a {
    position: relative;
}

.nav-dropdown-has-arrow li.has-dropdown:before {
    border-width: 10px;
    margin-left: -10px;
    border-bottom-color: rgba(0,0,0,0.01);
}

/* --- Arrow style --- */
.nav-dropdown-has-arrow.nav-dropdown-has-border li.has-dropdown:before {
    border-bottom-color: rgba(0, 0, 0, 0.01);
}

/* --- Mega Menu --- */
ul.nav.header-nav > li.mega-menu {
    position: initial;
}

li.mega-menu.current-dropdown > .nav-dropdown {
    left: 0px;
    margin-left: 0px !important;
}

.mega-menu ul.sub-menu li {
    width: 33.333%;
    float: left;
    padding-left: var(--space-10);
    padding-right: var(--space-3);
    position: relative;
    padding-top: var(--space-3);
    padding-bottom: var(--space-5);
}

.mega-menu .nav-dropdown-default .nav-column li > a,
.mega-menu .nav-dropdown.nav-dropdown-default > li > a {
    margin: 0;
    padding: 0;
    padding-bottom: var(--space-1);
    border-bottom: 0;
}

li.current-dropdown > .nav-dropdown-full,
li.has-dropdown:hover > .nav-dropdown-full {
    display: block;
}

.nav-dropdown-full > li.nav-dropdown-col {
    width: 25%;
    float: left;
}

.header-nav li.nav-dropdown-col:hover > ul {
    display: block !important;
}

/* --- Mobile Menu --- */
.off-canvas-left .mfp-content,
.off-canvas-right .mfp-content {
    width: 85%;
    max-width: 360px;
    background-color: var(--color-bg-primary);
    box-shadow: var(--shadow-xl);
}

#main-menu ul.nav-sidebar .html.custom {
    color: var(--color-text-inverse);
    flex-flow: nowrap;
}

#main-menu ul.nav-sidebar .html.custom i {
    min-width: 35px;
    height: 35px;
    line-height: 35px;
    border-radius: 50%;
    margin-right: var(--space-3);
    text-align: center;
    border: 1px solid rgba(255,255,255,0.3);
}