body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
.container {
    max-width: 600px;
    margin: 40px auto;
    padding: 20px;
    text-align: center;
}
input, button {
    width: 90%;
    padding: 10px;
    margin: 10px 0;
    font-size: 16px;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
th, td {
    padding: 10px;
    border: 1px solid #ddd;
}
@media (max-width: 600px) {
    table, thead, tbody, th, td, tr {
        display: block;
    }
    tr {
        margin-bottom: 15px;
    }
}