body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1, h2 {
    text-align: center;
    color: #333;
}

form {
    margin: 20px 0;
}

label {
    display: block;
    margin: 10px 0 5px;
    font-weight: bold;
}

input, select, button {
    width: 100%;
    padding: 10px;
    margin: 5px 0 15px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    background-color: #42a5f5;
    color: white;
    font-weight: bold;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: #1e88e5;
}

.message {
    color: green;
    font-weight: bold;
    text-align: center;
}

.receipts {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
}

.receipt-image {
    max-width: 200px;
    height: auto;
    border: 2px solid #ccc;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}