#main {
    margin: 128px auto 0;
    width: 640px;
}

table {
    font-size: 24px;
}

td {
    padding: 8px;
}

.big {
    font-size: 64px;
    font-weight: bold;
}

#btnDnsResolver {
    margin: 32px auto;
    padding: 10px;
    display: block;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s;
}

#btnDnsResolver:hover {
    background-color: #2980b9;
}

#resolverTable {
    margin: 0 auto;
    border-collapse: collapse;
}

#resolverTable th,
#resolverTable td {
    border: 1px solid #444;
    border-collapse: collapse;
}

#resolverTable thead tr {
    background-color: #ccc;
}

#resolverTable tbody tr:nth-child(even) {
    background-color: #f7f7f7;
}