/* header.css - CSS chuẩn cho thanh menu header */

.header-container {
    border-bottom: 1px solid #dee2e6 !important;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1) !important;
    background-color: #ffffff !important;
    padding: 8px 0 !important;
    margin-bottom: 15px !important;
    position: sticky !important;
    top: 0 !important;
    z-index: 1000 !important;
}

.header-container .navbar {
    padding: 0.3rem 0.8rem !important;
}

.header-container .navbar-brand {
    font-size: 1rem !important;
    color: #1877f2 !important;
    font-family: 'Playfair Display', serif !important;
    font-weight: 700;
}

.header-container .nav-link {
    font-size: 1rem !important;
    padding: 0.5rem 1rem !important; /* Tăng padding để nút bấm to đẹp hơn */
    color: #65676b !important; /* Màu xám nhạt cho menu chưa chọn */
    font-family: 'Playfair Display', serif !important;
    font-weight: 600;
    transition: all 0.2s;
    border-radius: 8px; /* Bo tròn góc nhẹ */
    margin: 0 2px;
}

.header-container .navbar-nav {
    gap: 0.2rem !important;
}

/* Hover: Khi di chuột vào */
.header-container .nav-link:hover {
    background-color: #f0f2f5 !important; /* Nền xám nhẹ khi hover */
    color: #1877f2 !important;
}

/* --- QUAN TRỌNG: Trạng thái ACTIVE (Cái Đại Ka khoanh đỏ) --- */
.header-container .nav-link.active {
    color: #1877f2 !important; /* Chữ màu xanh Facebook */
    font-weight: 800 !important; /* In đậm */
    background-color: #e7f3ff !important; /* Nền xanh nhạt chuẩn form */
}