.hrph-price-history-container {
    max-width: 800px; /* Limits the chart width */
    height: 400px;    /* Fixed height for the chart */
    margin: 20px auto;
    padding: 15px;
    background-color: #fff;
    border: 1px solid #ddd;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    border-radius: 5px;
    position: relative; /* Important for Chart.js responsiveness */
}

.hrph-price-history-container h3 {
    text-align: center;
    margin-bottom: 15px;
    color: #333;
}

/* Ensure the canvas fills its container */
.hrph-price-history-container canvas {
    width: 100% !important;
    height: 100% !important;
    display: block; /* Remove extra space below canvas */
}