.menu {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 40px;
    background: grey;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.menu-label {
    writing-mode: vertical-rl;
    color: white;
    cursor: pointer;
    font-weight: bold;
    font-size: 20px;
    opacity: 1;
}

.menu:hover .menu-label {
    opacity: 0; 
}

.menu:hover {
    width: 220px;
}

.menu_list {
    list-style: none;
    margin: 0;
    opacity: 0;
    position: absolute;
    top: 20px;
    left: 60px;
}

.menu:hover .menu_list {
    opacity: 1;
}

.menu_item {
    margin: 15px 0;
}

.menu_link {
    text-decoration: none;
    color: white;
    font-size: 16px;
    display: block;
}

.menu_link::before {
    content: "♦";
    color: orange;
    margin-right: 8px;
    font-size: 20px;
}

.menu_link:hover {
    color: orange;
}