* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: aliceblue;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.chart-container {
    width: 100%;
    max-width: 800px;
    height: 500px;
    padding: 10px;
    position: relative;
}

.source-note {
    position: absolute;
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    color: #888;
    font-style: italic;
    text-align: center;
    width: 100%;
    padding: 0 20px;
}

.annotation-tooltip {
    display: none;
    position: absolute;
    background-color: rgba(231, 76, 60, 0.95);
    color: white;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 12px;
    max-width: 280px;
    line-height: 1.4;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    z-index: 100;
    pointer-events: none;
    transform: translateX(-50%);
}

canvas {
    width: 100% !important;
    height: calc(100% - 25px) !important;
}

@media (max-width: 600px) {
    .chart-container {
        height: 450px;
        padding: 5px;
    }

    .source-note {
        font-size: 9px;
    }
}