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