/* ===== HEADER ===== */
.main-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    max-width: 1200px;
    margin: 0 auto;
}

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

.header-logo img {
    height: 60px;
    width: auto;
}

/* ===== MENU ===== */
.navbar {
    flex: 1;
    display: flex;
    justify-content: center;
}

.navbar-nav {
    display: flex;
    gap: 10px;
    margin: 0;
    padding: 0;
}

.navbar-nav li {
    list-style: none;
    position: relative;
}

.navbar-nav li a {
    display: block;
    padding: 10px 12px;
    text-decoration: none;
    color: #000;
    font-weight: 500;
    white-space: nowrap;
}

.navbar-nav li a:hover {
    color: #007bff;
}

/* tạo line ẩn */
.navbar-nav li a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -3px;
    width: 0;
    height: 2px;
    background: #007bff; /* màu line */
    transition: 0.3s;
}

/* hover hiện line */
.navbar-nav li a:hover::after {
    width: 100%;
}
/* hover cấp 1 */
.navbar-nav > li > a:hover,
.navbar-nav > li:hover > a {
    color: #007bff !important;
}

/* ===== DROPDOWN ===== */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    display: none;
    min-width: 180px;
    background: #fff;
    border: 1px solid #ddd;
    z-index: 999;
}

.dropdown-toggle::after {
    display: none !important;
}

.navbar li:hover > .dropdown-menu {
    display: block;
}

/* ===== SEARCH ===== */
.search-box {
    flex: 0 0 auto;
    position: relative;
    width: 150px;
}

.search-box input {
    width: 100%;
    height: 25px;
    padding: 0 28px 0 10px;
    border: 1px ;
    border-radius: 20px;
}

/* ICON SEARCH */
.btn-search {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    border: none;
    background: transparent;
}

.btn-search i {
    font-size: 14px;
    color: #fff;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 991px) {
    .main-header {
        flex-direction: column;
    }

    .navbar-nav {
        flex-direction: column;
        align-items: center;
    }

    .dropdown-menu {
        position: relative;
        border: none;
    }
}