body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #eee;
}

#contentContainer {
    width: 400px;
}

#harryPotterGraph {
    display: none;
    width: 100%;
    margin-top: 20px;
}

.layer {
    display: flex;
    justify-content: center;
    margin-bottom: 10px;
}

.box {
    border: 2px solid black;
    padding: 10px;
    text-align: center;
    margin: 2px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.box:hover {
    background-color: #ddd;
}

.top {
    width: 50%;
}

.middle {
    width: 23%;
}

.bottom {
    width: 34.5%;
}

.hidden-content {
    display: none;
}

.title {
    text-align: center;
    font-weight: bold;
}
#showGraphBtn {
    display: none;
}