body {
    font-family: Arial, sans-serif;
    margin: 20px;
}

.main-box {
    border: 1px solid #ccc;
    padding: 15px;
    width: 550px;
    background-color: #f9f9f9;
}

.chart-types-box {
    border: 1px solid #ddd;
    padding: 10px;
    margin-bottom: 15px;
    background-color: #fff;
}

.input-row {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.input-row label {
    width: 60px;
    font-size: 14px;
}

.input-row input[type="text"] {
    width: 320px;
    padding: 4px;
}

.btn-draw {
    margin-left: 10px;
    padding: 4px 12px;
    cursor: pointer;
}

#chart_div {
    width: 600px;
    height: 400px;
    margin-top: 20px;
    border: 1px solid #eee;
}