body {
    font-family: Arial, sans-serif;
}
.container {
    width: 90%;
    max-width: 1100px;
    margin: 40px auto;
}

.chart-container {
    margin: 60px auto;
    height: 420px;
    background: #fff;
    padding: 40px 25px 70px;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0,0,0,0.08);
    position: relative;
}

h1 {
    text-align: center;
    margin-bottom: 16px;
}

h3 {
    text-align: center;
    margin-bottom: 12px;
}

.chart-container {
    width: 80%;
    max-width: 900px;
    margin: 40px auto;
    height: 480px;
}