table {
    font-family: Arial, sans-serif;
    font-size: 18px;
}
* {
    box-sizing: border-box;
}

table {
    width: 640px;
    border-collapse: collapse;
}

th,
td {
    padding: 12px;
    text-align: left;
    border: 1px solid #ddd;
}

th {
    background-color: #f4f4f4;
}

tr:nth-child(even) {
    filter: brightness(0.96);
}
.bye-match {
    /* background-color: #ffcccc; */
    filter: brightness(0.65);
}
.round-nr-1,
.round-nr-7 {
    background-color: #ccccff;
}
.round-nr-2,
.round-nr-8 {
    background-color: #ccffcc;
}
.round-nr-3,
.round-nr-9 {
    background-color: #ffccff;
}
.round-nr-4,
.round-nr-10 {
    background-color: #ffffcc;
}
.round-nr-5,
.round-nr-11 {
    background-color: #aaffaa;
}
.round-nr-6,
.round-nr-12 {
    background-color: #ccffcc;
}