body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh;
    background-color: #333;
    color: white;
    margin: 0;
}

.navbar {
    width: 100%;
    background: #222;
    padding: 15px;
    text-align: center;
    position: fixed;
    top: 0;
    left: 0;
}

.back-button {
    background: #666;
    color: white;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    border-radius: 5px;
    font-size: 16px;
}

.back-button:hover {
    background: #888;
}

.container {
    display: flex;
    width: 60%;
    background: #444;
    border-radius: 10px;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.2);
    margin-top: 80px;
}

.sidebar {
    width: 30%;
    background: #222;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.tab-button {
    background: #666;
    color: white;
    border: none;
    padding: 10px;
    margin: 5px 0;
    cursor: pointer;
    border-radius: 5px;
    transition: 0.3s;
}

.tab-button:hover {
    background: #888;
}

.content {
    width: 70%;
    padding: 20px;
}

.tab-content {
    display: none;
}