.sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 190px;
    height: 100vh;
    background: #1f2937;
    padding-top: 20px;
    box-sizing: border-box;
    font-family:Tahoma;
}

.sidebar h2 {
    color: #ffffff;
    text-align: center;
    margin-bottom: 30px;
}

.sidebar a {
    display: block;
    color: #ffffff;
    text-decoration: none;
    padding: 14px 20px;
    transition: 0.3s;
}

.sidebar a:hover {
    background: #374151;
}

.sidebar a.active {
    background: #4f46e5;
}