body {
    background-color: #f8f9fa;
}

.navbar {
    margin-bottom: 2rem;
}

.card {
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
}

.card-title {
    font-weight: 600;
}

#loading {
    padding: 2rem;
}

canvas {
    max-height: 400px;
}