@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,400;0,500;1,400&display=swap');

body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f7fa;
    color: #323232;
}

.container {
    max-width: 960px;
    margin: auto;
    padding: 20px;
}

h1 {
    color: #2c3e50;
}

select {
    padding: 10px;
    width: 200px;
    margin-right: 20px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.explanation {
    margin-top: 20px;
    font-size: 18px;
    color: #7f8c8d;
}

.chart {
    width: 95%;
    height: 45rem;
    margin: auto;
    /* center chart */
    display: flex;
    justify-content: center;
    align-items: center;    
}