body {
    margin: 0;
    font-family: Arial, sans-serif;
    display: flex;
    height: 100vh;
}

.container {
    display: flex;
    width: 100%;
}

.menu {
    width: 25%;
    background-color: #d4f4dd;
    overflow: hidden;
    transition: width 0.3s ease;
}

.menu:hover {
    width: 35%;
}

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

.menu a {
    display: block;
    padding: 10px 15px;
    text-decoration: none;
    color: #333;
}

.menu a:hover {
    background-color: #b2e6b8;
}



.menu ul li:hover > ul {
    display: block;
}
.menu ul ul {
    display: none;
    background-color: #c8f1cc;
}

.content {
    width: 75%;
    background-color: #f9f9f9;
}