.container {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    top: 0;
    bottom: 0;
    z-index: 1000;
    background-color: white;
}

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

.sidebar ul li {
    margin: 20px 0;
    position: relative;
}

.sidebar ul li a {
    color: #333;
    font-size: 24px;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid transparent;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    transition: all 0.3s ease;
}

.sidebar ul li:hover a {
    border-color: #007BFF;
}

.sidebar ul li .tooltip {
    display: none;
    position: absolute;
    top: 50%;
    left: calc(100% + 10px);
    transform: translate(0, -50%);
    background-color: rgba(255, 255, 255, 0.8);
    padding: 10px;
    border-radius: 5px;
    white-space: nowrap;
    box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.1);
}

.sidebar ul li:hover .tooltip {
    display: block;
}