body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 2000px;
    margin: auto;
    background-color: #fff;
    padding: 30px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    border-radius: 8px;
    text-align: center;
}

h1 {
    margin-bottom: 20px;
}

.summary {
    font-size: 16px;
    margin-bottom: 25px;
    text-align: center;
    line-height: 1.6;
    }

#buttons {
    margin-bottom: 20px;
}

#buttons button {
    background-color: #1976d2;
    color: white;
    border: none;
    padding: 10px 16px;
    margin: 4px;
    font-size: 14px;
    border-radius: 4px;
    cursor: pointer;
}

#buttons button:hover {
    background-color: #125aa2;
}

#chart {
    display: flex;
    justify-content: center;
    margin-top: 20px;
    overflow-x: auto;
}

.tooltip {
    font-size: 14px;
    pointer-events: none;
    z-index: 10;
}

#annotation {
    margin-top: 20px;
    font-size: 20px;
    font-style: italic;
}