body {
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    color: #0056b3;
    margin-bottom: 20px;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin-bottom: 30px;
}

button:hover {
    background-color: #0056b3;
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    min-height: 60px; /* Ensure space even when no numbers are displayed */
}

.number {
    width: 50px;
    height: 50px;
    background-color: #e9ecef;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: #333;
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.number:empty {
    background-color: #f0f0f0;
    color: #ccc;
}

.number:not(:empty) {
    background-color: #28a745;
    color: white;
    transform: scale(1.05);
}