body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    background-color: #f4f4f4;
}

.sidebar {
    height: 100%;
    width: 250px;
    position: fixed;
    top: 0;
    left: 0;
    background-color: #333;
    padding-top: 20px;
    transition: width 0.3s;
}

.sidebar-header {
    text-align: center;
    color: white;
    padding: 20px;
}

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

.sidebar-menu li {
    padding: 10px 20px;
    transition: background 0.3s;
}

.sidebar-menu li a {
    text-decoration: none;
    font-size: 18px;
    color: white;
    display: block;
}

.sidebar-menu li a i {
    margin-right: 10px;
}

.sidebar-menu li:hover {
    background-color: #575757;
}

.content {
    margin-left: 250px;
    padding: 20px;
}