body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f5f7fa;
}

/* Sidebar */
.sidebar {
    width: 260px;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background: linear-gradient(135deg,#0072FF,#00B0FF);
    color: #fff;
    padding-top: 20px;
    overflow-y: auto;
    transition: all 0.3s;
    z-index: 1000;
}
.sidebar.collapsed { width: 80px; }
.sidebar h2 {
    /*padding-left: 20px;*/
    /*font-size:1.6rem;*/
    margin-bottom: 30px;
}
.sidebar.show { left: 0; }



/* Khi sidebar bị thu nhỏ */
.sidebar.collapsed {
    width: 70px; /* tùy bạn */
    transition: width 0.3s ease;
}

/* Ẩn chữ trong menu cấp 1 */
.sidebar.collapsed .menu-item span {
    display: none;
}

/* Ẩn submenu hoàn toàn */
.sidebar.collapsed .submenu {
    display: none !important;
}

/* Căn giữa icon khi collapsed */
.sidebar.collapsed .menu-item .d-flex {
    justify-content: center;
}

/* Ẩn dấu mũi tên xuống */
.sidebar.collapsed .menu-item .bi-chevron-down {
    display: none;
}
/* Logo kích thước chuẩn */
.sidebar .logo {
    width: 35px;
    height: auto;
}





/* Sidebar Logo Styling */
.sidebar-logo {
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    gap: 0.5rem; /* Khoảng cách giữa logo và chữ, có thể tăng/giảm */
    padding-left: 1rem; /* Căn logo + chữ vào sidebar */
}

/* Logo SVG */
.sidebar-logo .logo {
    flex-shrink: 0; /* Không co lại */
    width: 40px;    /* Có thể chỉnh kích thước */
    height: 40px;
    transition: all 0.3s ease;
}

/* Logo Text */
.sidebar-logo .logo-text {
    /*font-size: 1.4rem;  !* Có thể chỉnh nhỏ hơn để cân đối *!*/
    font-weight: 600;
    color: #fff;
    margin: 0;
    white-space: nowrap;
    transition: all 0.3s ease;
}

/* Khi sidebar collapsed */
.sidebar.collapsed .sidebar-logo {
    justify-content: center; /* Căn giữa logo */
    padding-left: 0;
}

.sidebar.collapsed .sidebar-logo .logo-text {
    display: none; /* Ẩn chữ */
}







/* Menu */
.menu { list-style: none; padding:0; margin:0; }
.menu li { margin-bottom: 5px; position: relative; }
.menu-item {
    width: 100%;
    padding: 10px 20px;
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.menu-item a {
    text-decoration: none;
    color: #fff;
    flex: 1;
}

.menu-item i.bi-chevron-down {
    pointer-events: none;
}


/* Hover desktop only */
@media (hover: hover) and (pointer: fine) {
    .menu-item:hover { background: rgba(255,255,255,0.2); }
    .submenu-item:hover { background: rgba(255,255,255,0.25); }
}

/* Submenu */
.submenu {
    list-style: none;
    padding-left: 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}
.submenu li { margin-bottom: 5px; }
.submenu-item {
    padding: 8px 15px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    transition: background 0.2s;
}
.submenu-item a { flex: 1; color: #fff; text-decoration: none; }

/* Submenu open */
.has-submenu.open > .menu-item i.bi-chevron-down {
    transform: rotate(180deg);
    transition: transform 0.3s;
}
.has-submenu.open > .submenu { max-height: 500px; }



/* Active menu/submenu */
.menu-item.active,
.submenu-item.active {
    background-color: rgba(255, 255, 255, 0.45) !important; /* nổi bật trên gradient */
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.menu-item.active a,
.submenu-item.active a {
    font-weight: 600;
    color: #fff !important;
}
.menu-item.active i,
.submenu-item.active i {
    color: #fff !important;
}

/* Sidebar collapsed tooltip */
.sidebar.collapsed .submenu {
    position: absolute;
    left: 80px;
    top: 0;
    background: linear-gradient(135deg,#0072FF,#00B0FF);
    min-width: 180px;
    border-radius: 12px;
    padding: 10px 0;
    display: none;
    z-index: 2000;
}
.sidebar.collapsed .has-submenu:hover .submenu { display: block; }

/* Main content */
.main-content { margin-left: 260px; padding: 20px; transition: margin-left 0.3s; }
.sidebar.collapsed ~ .main-content { margin-left: 80px; }

/* Cards */
.card {
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: transform 0.2s;
}
.card:hover { transform: translateY(-5px); }

/* Topbar */
.topbar {
    background-color: #fff;
    border-radius: 12px;
    transition: all 0.3s ease;
    padding: 10px 15px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* Cart */
.cart-icon {
    position: relative;
    cursor: pointer;
    margin-right: 25px;
}
.cart-icon i {
    font-size: 1.5rem;
    color: #333;
    transition: all 0.3s ease;
}
.cart-icon:hover i {
    color: #0072FF;
    transform: scale(1.2);
}
.cart-icon .badge {
    position: absolute;
    top: -5px;
    right: -5px;
    font-size: 0.65rem;
    padding: 0.25em 0.5em;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
    transition: all 0.3s ease;
    background-color: #dc3545;
    color: #fff;
    border-radius: 50%;
}
.cart-icon:hover .badge { transform: scale(1.2); }

.topbar .dropdown-menu { border-radius:12px; }

/* Mobile */
@media (max-width:768px){
    .sidebar { left:-260px; }
    .sidebar.show { left:0; }
    .main-content { margin-left:0; }
    .overlay {
        display:none;
        position:fixed; top:0; left:0;
        width:100%; height:100%;
        background: rgba(0,0,0,0.3);
        z-index:999;
        transition: all 0.3s;
    }
    .overlay.show { display:block; }
    .sidebar.collapsed ~ .main-content { margin-left:0; }

    /* Mobile: active phải nổi bật */
    .menu-item.active,
    .submenu-item.active {
        background-color: rgba(255,255,255,0.55) !important;
        box-shadow: 0 2px 10px rgba(0,0,0,0.25);
    }
}

/* Hover-scale card effect */
.hover-scale { transition: transform 0.2s, box-shadow 0.2s; }
.hover-scale:hover { transform: translateY(-5px); box-shadow: 0 8px 25px rgba(0,0,0,0.12); }