body {
    font-family: Arial, sans-serif;
}
.viivat td {
    border: 1px solid #000;
    padding: 4px 8px;
}
table {
    border-collapse: collapse;
}
th {
    text-align: left;
}
.raidat tr:nth-child(even) {
    background-color: #b6dcff;
}
.raidat th, .viivat td {
    padding: 4px 8px;
}