body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f7f7f7;
}
h2 {
    color: #333;
}
form, table, ul {
    margin: 20px auto;
    max-width: 400px;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
table {
    width: 100%;
    border-collapse: collapse;
}
td, th {
    padding: 8px;
    border: 1px solid #ddd;
    text-align: left;
}
input, select, button {
    width: 100%;
    margin: 8px 0;
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #ccc;
    box-sizing: border-box;
}
button {
    background: #2196f3;
    color: #fff;
    border: none;
    cursor: pointer;
}
button:hover {
    background: #1976d2;
}
@media (max-width: 600px) {
    form, table, ul {
        max-width: 98vw;
        padding: 10px;
    }
    h2 {
        font-size: 1.2em;
    }
}