body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f7f7f7;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 600px;
    margin: 40px auto;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    padding: 32px 24px 24px 24px;
}

h1 {
    text-align: center;
    margin-bottom: 24px;
    font-size: 2rem;
}

.controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 16px;
}

#aoi-slider {
    width: 80%;
    margin-top: 8px;
}

.info {
    text-align: center;
    margin-bottom: 18px;
    font-size: 1.1rem;
}

.plot {
    width: 100%;
    min-height: 350px;
}

#aoi-canvas {
    display: block;
    margin: 0 auto 18px auto;
    background: #f0f4fa;
    border: 1px solid #d0d0d0;
    border-radius: 6px;
}