body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
}

label {
    display: block;
    margin-top: 10px;
}

input[type="number"],
input[type="email"] {
    width: calc(100% - 22px);
    padding: 10px;
    margin-top: 5px;
    margin-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    padding: 10px 15px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-bottom: 20px;
}

button:hover {
    background-color: #45a049;
}

.error {
    color: red;
    margin-bottom: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    border: 1em solid #ccc;
}

th {
    background-color: darkgreen;
    color: white;
    padding: 10px;
    text-align: right;
}

tr:nth-child(even) {
    background-color: #f0f0f0;
}

tr:nth-child(odd) {
    background-color: #eeffee;
}

td {
    padding: 10px;
    border: 1px solid #ccc;
    text-align: right;
}