body {
    background: linear-gradient(#502a50, #7e2a53);
    font-family: Verdana, sans-serif;
    margin: 0;
}

#container {
    width: 900px;
    margin: 20px auto;
}

#header {
    background: black;
    color: white;
    text-align: center;
    padding: 15px;
    border: 4px solid black;
}

#content {
    display: flex;
    margin-top: 10px;
}

#sidebar {
    width: 200px;
    background: #ba71a2;
    padding: 15px;
    border: 3px solid black;
}

#sidebar a {
    color: #ecd0ec;
    text-decoration: none;
}

#sidebar a:hover {
    color: black;
}

#main {
    flex: 1;
    margin-left: 10px;
    background: #502a50;
    padding: 20px;
    border: 3px solid black;
}

.box {
    margin-top: 20px;
    padding: 10px;
    background: #ba71a2;
    border: 2px #46d13a;
}