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

.container {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 500px;
    text-align: center;
    box-sizing: border-box;
}

h1, h2 {
    color: #333;
}

.input-group, .results-container {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #555;
}

input[type="number"] {
    width: calc(100% - 100px);
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 10px 15px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
    margin-left: 10px;
}

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

#calculateButton {
    background-color: #28a745;
    margin-top: 10px;
}

#calculateButton:hover {
    background-color: #218838;
}

.results-container {
    border-top: 2px solid #eee;
    padding-top: 20px;
    text-align: left;
}

.results-container p {
    margin: 8px 0;
    color: #333;
}

#numbersList {
    font-style: italic;
    color: #777;
    word-wrap: break-word;
}