/* --- GLOBAL & HEAD/NAVBAR CSS --- */
:root {
    --primary-teal: #00cba0;
    --primary-dark: #00a878;
    --secondary-blue: #0092ca;
    --dark-blue: #1e3d7b;
    --darker-blue: #12264e;
    --light-bg: #f8fafc;
    --text-color: #334155;
    --border-color: #e2e8f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
}

body {
    background-color: var(--light-bg);
    color: var(--text-color);
    line-height: 1.6;
}

/* --- TOP BAR --- */
.top-bar {
    background: var(--darker-blue);
    color: #cbd5e1;
    font-size: 13px;
    width: 100%;
}

.top-bar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 8px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
}

.top-bar-info {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.top-bar-info span, 
.top-bar-social span {
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
}

.top-bar-info i,
.top-bar-social i {
    color: var(--primary-teal);
    margin-right: 6px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
}

.brand-text h1 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #0b633d;
    margin: 0;
    line-height: 1.2;
}

.brand-text p {
    font-size: 0.75rem;
    color: #4a5568;
    margin: 2px 0 0 0;
}

@media screen and (max-width: 768px) {
    .top-bar {
        display: none;
    }
}

/* --- HEADER & NAVBAR --- */
header {
    background: #ffffff;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.menu-toggle {
    display: none;
    font-size: 24px;
    color: var(--dark-blue);
    cursor: pointer;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 5px;
    align-items: center;
}

.nav-item {
    padding: 8px 16px;
    color: var(--dark-blue);
    text-decoration: none;
    font-weight: 700;
    font-size: 14px;
    border-radius: 6px;
    transition: all 0.3s ease;
    cursor: pointer;
    display: inline-block;
}

.nav-item:hover, .nav-item.active {
    background: var(--primary-teal);
    color: #ffffff;
}

/* --- DROPDOWN & MENU CẤP 1 --- */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
    border: 1px solid #e2e8f0;
    padding: 20px;
    min-width: 320px;
    display: none;
    z-index: 1000;
    list-style: none;
    margin: 0;
}

.dropdown:hover .dropdown-menu,
.dropdown.active .dropdown-menu {
    display: block;
}

.dropdown-category {
    margin-bottom: 18px;
}

.dropdown-category:last-child {
    margin-bottom: 0;
}

.category-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 700;
    color: #475569;
    padding-bottom: 8px;
    margin-bottom: 8px;
    border-bottom: 1px solid #f1f5f9;
}

.category-title i {
    color: #0b633d;
    font-size: 16px;
}

.dropdown-category ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.dropdown-category ul li a {
    display: block;
    padding: 8px 12px;
    color: #1e293b;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
    line-height: 1.4;
}

.dropdown-category ul li a:hover {
    background-color: #f0fdf4;
    color: #0b633d;
    padding-left: 16px;
}

.brand-tagline {
    display: none;
}

/* =========================================
   SUBMENU CẤP 2 (KHÔNG XUỐNG DÒNG, ĐỦ RỘNG)
   ========================================= */
.dropdown-menu .has-submenu {
    position: relative;
}

/* Cố định khung chứa menu con, không cho tự bóp méo hoặc xuống dòng */
.dropdown-menu .has-submenu .submenu-list {
    display: none;
    position: absolute;
    top: 0;
    left: 100%;
    background: #ffffff;
    min-width: 300px;              /* Đủ rộng để chứa toàn bộ tiêu đề dài */
    width: max-content;            /* Tự co giãn theo nội dung chữ dài nhất */
    white-space: nowrap;           /* Ngăn chặn tuyệt đối việc xuống dòng chữ */
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    padding: 8px 0;
    border: 1px solid #e2e8f0;
    z-index: 100;
}

.dropdown-menu .submenu-list li a {
    white-space: nowrap;           /* Chống xuống dòng cho từng mục con */
    padding: 10px 16px;
}

/* Khi rê chuột vào (trên Desktop) thì hiển thị menu con */
@media (min-width: 992px) {
    .dropdown-menu .has-submenu:hover > .submenu-list {
        display: block;
    }
}

/* Trên Mobile: Xổ xuống khi có class .open */
@media (max-width: 991px) {
    .dropdown-menu .submenu-list {
        position: static;
        box-shadow: none;
        border: none;
        padding-left: 15px;
        background: #f8fafc;
        white-space: normal;       /* Trên mobile cho phép xuống dòng nếu màn hình quá hẹp */
    }
    .dropdown-menu .submenu-list li a {
        white-space: normal;
    }
    .dropdown-menu .has-submenu.open > .submenu-list {
        display: block;
    }
}

/* --- RESPONSIVE CHO MOBILE (Dưới 992px) --- */
@media screen and (max-width: 992px) {
    .top-bar {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .brand-text h1 {
        font-size: 13px;
    }

    .brand-text p {
        font-size: 9px;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background-color: #ffffff;
        width: 100%;
        height: calc(100vh - 70px);
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        transition: 0.3s ease-in-out;
        align-items: flex-start;
        padding: 20px 30px;
        overflow-y: auto;
        gap: 15px;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-item {
        width: 100%;
        padding: 10px 15px;
    }

    .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        padding-left: 15px;
        display: block;
        background: var(--light-bg);
        margin-top: 5px;
        border-radius: 6px;
    }

    .dropdown:hover .dropdown-menu {
        display: block;
    }
}

@media screen and (min-width: 768px) {
    .brand-tagline {
        display: block;
    }
}

/* =========================================
   ĐIỀU KHIỂN HIỂN THỊ SUBMENU CẤP 2 TRÊN MOBILE
   ========================================= */
@media (max-width: 992px) {
    /* Mặc định ẩn danh sách submenu cấp 2 trên mobile */
    .dropdown-menu .has-submenu > .submenu-list {
        display: none !important;
        position: static;
        box-shadow: none;
        border: none;
        padding-left: 15px;
        background: #f1f5f9;
        margin-top: 6px;
        border-radius: 6px;
        width: 100%;
        white-space: normal;
    }

    /* Khi thẻ cha có class .open (được thêm qua JS khi click), hiển thị submenu cấp 2 */
    .dropdown-menu .has-submenu.open > .submenu-list {
        display: block !important;
    }

    /* Hiệu ứng xoay mũi tên khi mở submenu cấp 2 */
    .dropdown-menu .has-submenu.open > a .arrow-icon {
        transform: rotate(90deg);
        transition: transform 0.3s ease;
    }
    
    .dropdown-menu .has-submenu > a .arrow-icon {
        transition: transform 0.3s ease;
    }
}