.sidebar {
    width: 200px;
    height: 500px;
    background-color: #f8f8f8;
    color: #578de1;
    transition: transform 0.3s;
    overflow: hidden;
}

.sidebar.collapsed {
    transform: translateX(-200px);
}

.sidebar-header {
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: #f8f8f8;
}

.sidebar-toggle {
    background-color: transparent;
    color: #000000;
    border: none;
    cursor: pointer;
}

.sidebar-menu {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.sidebar-item {
    position: relative;
}

.sidebar-item > a {
    display: block;
    padding: 10px;
    color: #578de1;
    text-decoration: none;
}

.sub-menu {
    display: none;
    list-style-type: none;
    padding-left: 15px;
}

.sub-menu.collapsed {
    display: block;
}

.submenu-toggle {
    position: absolute;
    top: 0;
    right: 0;
    width: 20px;
    height: 20px;
    background-color: transparent;
    border: none;
    cursor: pointer;
}

.submenu-toggle::before {
    content: "+";
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #578de1;
    font-size: 16px;
    font-weight: bold;
}

.content {
    margin-left: 200px;
    padding: 20px;
}