/* Header chung */
#site-header {
    background: #fff;
    border-bottom: 1px solid #ddd;
    position: relative;
    z-index: 100;
    width: 100%;
    padding: 10px 0;
}

#site-header .container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 15px;
    box-sizing: border-box;
}

.header-container {
    display: flex;
    flex-direction: column;
    width: 100%;
}

/* Top header - Logo và Search */
.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
    margin-bottom: 10px;
}

/* Logo */
.header-logo {
    flex: 0 0 auto;
}

.header-logo a {
    display: inline-block;
}

.header-logo img,
.header-logo h1 {
    max-width: 200px;
    height: auto;
}

/* Right side - Search và Menu */
.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* Search Bar */
.header-search {
    position: relative;
}

.search-form {
    position: relative;
}

.search-wrapper {
    display: flex;
    align-items: center;
}

.search-field {
    width: 300px;
    padding: 8px 35px 8px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: all 0.3s ease;
}

/* Ẩn nút x mặc định của trình duyệt */
.search-field::-webkit-search-cancel-button {
    -webkit-appearance: none;
    appearance: none;
}

.search-field:focus {
    outline: none;
    border-color: #0073aa;
    box-shadow: 0 0 0 2px rgba(0, 115, 170, 0.2);
}

.search-submit,
.search-clear {
    position: absolute;
    top: 0;
    height: 100%;
    padding: 0 10px;
    background: none;
    border: none;
    cursor: pointer;
    color: #666;
    transition: color 0.3s ease;
}

.search-submit {
    right: 0;
}

.search-clear {
    right: 35px;
    display: none;
}

.search-submit:hover,
.search-clear:hover {
    color: #0073aa;
}

/* Chỉnh kích thước icon trong nút search */
.search-submit .material-symbols-outlined,
.search-clear .material-symbols-outlined {
    font-size: 16px;
}

/* Menu chính desktop */
.header-menu {
    width: 100%;
    display: flex;
    justify-content: center;
    border-top: 1px solid #eee;
    padding-top: 10px;
}

/* Menu cấp 1 */
.header-menu ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: flex-end;
}

.header-menu ul li {
    position: relative;
    margin: 0 15px;
}

.header-menu ul li a {
    display: inline-block;
    padding: 10px 0;
    color: #333 !important;
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
}

.header-menu ul li a:hover {
    color: #0092d1 !important;
}

/* Overlay cho mobile menu */
.menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 99;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.menu-overlay.open {
    display: block;
    opacity: 1;
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #333 !important;
    font-size: 24px;
    cursor: pointer;
    padding: 5px;
    margin-left: auto;
}

.mobile-menu-toggle button {
    background: none;
    border: none;
    padding: 5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.mobile-menu-toggle .material-symbols-outlined {
    font-size: 24px;
    color: #333 !important;
}

/* Nút đóng menu mobile */
.mobile-menu-close {
    display: none;
    position: fixed;
    top: 15px;
    right: 15px;
    z-index: 103;
}

.mobile-menu-close button {
    background: none;
    border: none;
    padding: 5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.mobile-menu-close .material-symbols-outlined {
    font-size: 24px;
    color: #333 !important;
}

/* Desktop Menu Styles */
@media (min-width: 769px) {
    /* Menu cấp 1 */
    .header-menu ul li {
        position: relative;
        margin: 0 15px;
    }

    .header-menu ul li a {
        display: inline-block;
        padding: 8px 0;
        color: #333 !important;
        text-decoration: none;
        font-weight: 500;
        font-size: 15px;
        transition: color 0.3s ease;
        position: relative;
        line-height: 1.2;
    }

    /* Thêm mũi tên cho menu cha có submenu */
    .header-menu ul li.menu-item-has-children > a {
        position: relative;
        display: inline-flex;
        align-items: center;
        white-space: nowrap;
    }

    .header-menu ul li.menu-item-has-children > a:after {
        content: '›';
        position: relative;
        margin-left: 10px;
        transform: rotate(90deg);
        font-size: 18px;
        color: #666 !important;
        transition: transform 0.3s ease;
        pointer-events: none;
        line-height: 1;
        display: inline-block;
        margin-top: -18px;
    }

    /* Loại bỏ mũi tên cho menu con và cháu */
    .header-menu ul li ul li > a:after,
    .header-menu ul li ul li ul li > a:after {
        display: none !important;
    }

    /* Menu cấp 2 */
    .header-menu ul li ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        background: #fff;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        z-index: 101;
        padding: 10px 0;
        border-radius: 4px;
        width: max-content;
        min-width: 180px;
        max-width: 100vw;
        box-sizing: border-box;
        max-height: none !important;
        overflow: visible !important;
        opacity: 0;
        transform: translateY(5px);
        transition: opacity 0.2s ease, transform 0.2s ease;
        pointer-events: none;
    }

    /* Menu cấp 2 không có menu cấp 3 */
    .header-menu ul li ul:not(:has(.menu-item-has-children)) {
        min-width: 180px;
        padding: 5px 0;
    }

    /* Menu cấp 2 có menu cấp 3 */
    .header-menu ul li ul:has(.menu-item-has-children) {
        display: none;
        position: absolute;
        top: 100%;
        left: 50%;
        transform: translateX(-50%);
        background: #fff;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        z-index: 101;
        padding: 10px;
        border-radius: 4px;
        width: max-content;
        min-width: 180px;
        max-width: 100vw;
        box-sizing: border-box;
        display: grid;
        grid-auto-flow: column;
        grid-auto-columns: minmax(150px, auto);
        gap: 15px;
        max-height: none !important;
        overflow: visible !important;
        opacity: 0;
        transform: translate(-50%, 5px);
        transition: opacity 0.2s ease, transform 0.2s ease;
        pointer-events: none;
    }

    /* Tạo vùng đệm cho menu cha */
    .header-menu ul li > a::after {
        content: '';
        position: absolute;
        bottom: -10px;
        left: 0;
        width: 100%;
        height: 10px;
        background: transparent;
        pointer-events: none;
    }

    /* Hiển thị menu khi hover vào menu cha */
    .header-menu ul li:hover > ul {
        display: block;
        opacity: 1;
        transform: none;
        pointer-events: auto;
    }

    .header-menu ul li:hover > ul:has(.menu-item-has-children) {
        display: grid;
        opacity: 1;
        transform: translate(-50%, 0);
        pointer-events: auto;
    }

    /* Giữ menu mở khi hover vào menu con */
    .header-menu ul li ul:hover {
        display: block;
        opacity: 1;
        transform: none;
        pointer-events: auto;
    }

    .header-menu ul li ul:has(.menu-item-has-children):hover {
        display: grid;
        opacity: 1;
        transform: translate(-50%, 0);
        pointer-events: auto;
    }

    /* Menu cấp 3 */
    .header-menu ul li ul li ul {
        position: static;
        display: block;
        width: auto;
        min-width: 100%;
        box-sizing: border-box;
        box-shadow: none;
        padding: 0;
        background: transparent;
        margin-top: 3px;
        z-index: 102;
        max-height: none !important;
        overflow: visible !important;
        opacity: 1;
        transform: none;
        pointer-events: none;
    }

    /* Hiển thị menu cấp 3 khi hover vào menu cấp 2 */
    .header-menu ul li ul li:hover > ul {
        display: block;
        opacity: 1;
        transform: none;
        pointer-events: auto;
    }

    /* Giữ menu cấp 3 mở khi hover vào nó */
    .header-menu ul li ul li ul:hover {
        display: block;
        opacity: 1;
        transform: none;
        pointer-events: auto;
    }

    /* Hover effect cho menu items */
    .header-menu ul li ul li a:hover {
        background-color: #f5f5f5;
        width: 100%;
    }
}

/* Mobile Menu Styles */
@media (max-width: 768px) {
    #site-header {
        padding: 5px 0;
    }

    #site-header .container {
        padding: 0 10px;
    }

    .header-container {
        padding: 0 5px;
    }

    .header-top {
        padding: 0;
        margin: 0;
    }

    .header-logo img,
    .header-logo h1 {
        max-width: 150px;
    }

    .header-right {
        gap: 10px;
    }

    .header-search {
        margin: 0;
    }

    .search-form {
        position: relative;
    }

    .search-wrapper {
        position: relative;
    }

    .search-field {
        width: 40px;
        max-width: 40px;
        padding: 8px 35px 8px 8px;
        border-radius: 20px;
        background: #f5f5f5;
        border: none;
        cursor: pointer;
        transition: all 0.3s ease;
    }

    .search-field:focus,
    .search-field:active,
    .search-field:hover {
        width: 180px;
        max-width: 180px;
        background: #fff;
        border: 1px solid #ddd;
        cursor: text;
    }

    .search-submit,
    .search-clear {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        padding: 8px;
        background: none;
        border: none;
        cursor: pointer;
        color: #666;
        z-index: 2;
        width: 35px;
        height: 35px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .search-submit {
        right: 0;
        pointer-events: none;
    }

    .search-clear {
        right: 35px;
    }

    .search-submit .material-symbols-outlined,
    .search-clear .material-symbols-outlined {
        font-size: 16px;
    }

    .search-field:not(:placeholder-shown) {
        width: 180px;
        max-width: 180px;
        background: #fff;
        border: 1px solid #ddd;
        padding-right: 70px;
    }

    .search-field:not(:placeholder-shown) + .search-clear {
        display: flex;
    }

    .search-field:not(:placeholder-shown) ~ .search-submit {
        pointer-events: auto;
    }

    .mobile-menu-toggle {
        display: block;
        margin: 0;
    }

    .mobile-menu-toggle button {
        padding: 8px;
        width: 40px;
        height: 40px;
    }

    .header-menu {
        display: none;
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        height: 100vh;
        background: #fff;
        padding: 60px 20px 20px;
        box-shadow: -2px 0 5px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
        overflow-y: auto;
        z-index: 999999;
        border-top: none;
        padding-top: 10px;
    }

    .header-menu.open {
        right: 0;
        display: block;
    }

    .mobile-menu-close {
        display: block;
    }

    .header-menu ul {
        flex-direction: column;
        padding: 0;
        margin: 0;
        width: 100%;
    }

    .header-menu ul li {
        margin: 0;
        width: 100%;
        display: block;
    }

    .header-menu ul li a {
        display: block;
        width: 100%;
        padding: 12px 0;
        border-bottom: 1px solid #eee;
        font-size: 16px;
        box-sizing: border-box;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .header-menu ul li ul {
        position: static;
        width: 100%;
        box-shadow: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
        padding-left: 10px;
        background: #f9f9f9;
        border-radius: 0;
        flex-direction: column;
        transform: none;
        left: 0;
        opacity: 1;
        display: none;
    }

    .header-menu ul li ul.active {
        max-height: none;
        display: block;
    }

    .header-menu ul li ul li {
        border-bottom: none;
        width: 100%;
        margin: 0;
        display: block;
    }

    .header-menu ul li ul > li > a {
        display: block;
        width: 100%;
        padding: 12px 0;
        font-size: 14px;
        color: #666 !important;
        position: relative;
        padding-left: 25px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        box-sizing: border-box;
    }

    .header-menu ul li ul > li > a::before {
        content: '+';
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        font-size: 18px;
        color: #666 !important;
        transition: transform 0.3s ease;
    }

    .header-menu ul li ul > li.active > a::before {
        transform: translateY(-50%) rotate(45deg);
    }

    .header-menu ul li ul li ul {
        padding-left: 0;
        background: #f5f5f5;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
        position: static;
        width: 100%;
        opacity: 1;
        display: none;
    }

    .header-menu ul li ul li ul.active {
        max-height: none;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 5px;
        padding: 10px;
    }

    .header-menu ul li ul li ul li {
        width: 100%;
        display: block;
    }

    .header-menu ul li ul li ul > li > a {
        display: block;
        width: 100%;
        padding: 6px 5px;
        font-size: 13px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        box-sizing: border-box;
    }

    .header-menu ul li ul li ul > li > a::before {
        content: '+';
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        font-size: 14px;
        color: #666;
        transition: transform 0.3s ease;
    }

    .header-menu ul li ul li ul > li.active > a::before {
        transform: translateY(-50%) rotate(45deg);
    }

    .header-menu ul li ul li ul > li > a::before {
        display: none;
    }

    .header-menu > ul > li.menu-item-has-children > a::after {
        content: '›';
        position: absolute;
        right: 5px;
        top: 50%;
        transform: translateY(-50%);
        font-size: 16px;
        color: #666 !important;
        transition: transform 0.3s ease;
    }

    .header-menu > ul > li.menu-item-has-children.active > a::after {
        transform: translateY(-50%) rotate(180deg);
    }

    .header-menu ul li ul li > a::after,
    .header-menu ul li ul li ul li > a::after {
        display: none;
    }
}

/* Mũi tên trong header */
.header .material-icons-outlined {
    font-size: 18px;
    vertical-align: -18px;
    margin-right: 5px;
}