body {
    background-color: #d6d6d6;
    font-family: Arial, sans-serif;
}
.container {
    margin-top: 50px;
}
.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}
.card-title {
    font-size: 1.5rem;
    color: #343a40;
}
.card-text {
    font-size: 1.2rem;
    color: #6c757d;
}
canvas {
    border: 1px solid #dee2e6;
    border-radius: 5px;
    margin-top: 10px;
}
h2 {
    color: #007bff;
    font-weight: bold;
}