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: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 600px; /* Wider for table */
    text-align: center;
}

h1, h2 {
    color: #333;
    margin-top: 20px;
    margin-bottom: 15px;
}

.input-group {
    margin-bottom: 15px;
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
}

.input-group input[type="number"], .input-group input[type="month"] {
    width: calc(100% - 20px);
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

button {
    background-color: #20c997;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 18px;
    margin-top: 10px;
}

button:hover {
    background-color: #17a2b8;
}

.results {
    margin-top: 30px;
    border-top: 1px solid #eee;
    padding-top: 20px;
    text-align: left;
}

.results p {
    font-size: 18px;
    color: #333;
    margin-bottom: 10px;
}

.results span {
    font-weight: bold;
    color: #20c997;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table th, table td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: center;
}

table th {
    background-color: #f2f2f2;
    font-weight: bold;
}

table tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}