.layout-container {
    display: flex;
    height: 100vh;
    background: #f8f9fa;
}

.sidebar {
    width: 270px;
    background-color: #ffffff;
    border-right: 1px solid #dee2e6;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 20px;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.05);
    font-family: 'Times New Roman', Times, serif;
    gap: 30px;
}
/* Main content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.sidebar-logo {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 18px;
    margin-bottom: 25px;
}

    .sidebar-logo img {
        height: auto;
    }
.logo1 {
    width: 90px;
    border-radius: 50%;
}
.logo2 {
    width: 130px;
}
.menu {
    display: flex;
    flex-direction: column;
    width: 100%;
    padding: 0 10px;
    gap: 18px;
}

.menu-item, .submenu-item {
    display: flex;
    align-items: center;
    gap: 18px;
    width: 100%;
    padding: 10px 15px;
    background: none;
    border: none;
    text-align: left;
    color: #333;
    font-size: 18px;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s ease;
}

    .menu-item:hover, .submenu-item:hover {
        background-color: #c9eeff;
        color: #0d6efd;
    }

    .menu-item .icon, .submenu-item .icon {
        width: 20px;
        text-align: center;
        font-size: 24px;
        color: #3670b4;
    }

.caret {
    margin-left: auto;
}

.submenu-container {
    display: none;
    flex-direction: column;
    padding-left: 25px;
}

    .submenu-container.open {
        display: flex;
        animation: dropdown 0.25s ease;
    }

@keyframes dropdown {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.main-content {
    flex: 1;
}
/* Phần nội dung chính */
.content-area {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
}
@media (max-width: 992px) {
    .sidebar {
        width: 220px;
    }

    .menu-item,
    .submenu-item {
        font-size: 16px;
        gap: 12px;
    }

    .logo1 {
        width: 70px;
    }

    .logo2 {
        width: 100px;
    }

    .content-area {
        padding: 15px;
    }
}

/* Mobile (<= 768px) */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: -270px; /* Ẩn sidebar mặc định */
        height: 100vh;
        z-index: 1050;
        transition: all 0.3s ease;
    }

        .sidebar.open {
            left: 0; /* Hiện sidebar khi mở */
        }

    .main-content {
        flex: 1;
        overflow: hidden;
    }

    .sidebar-toggle {
        display: block;
    }

    .content-area {
        padding: 15px;
    }

    .menu-item,
    .submenu-item {
        font-size: 16px;
        padding: 8px 12px;
    }
}

/* Siêu nhỏ (<= 480px) */
@media (max-width: 480px) {
    .menu-item,
    .submenu-item {
        font-size: 15px;
        gap: 10px;
    }

    .sidebar {
        width: 220px;
    }
}