body {
    background-color: rgb(192, 192, 192);
    color: black;
    font-family: sans-serif;
}
a {
    color: black;
}
a:active {
    color: white;
}
table {
    border-width: 2px;
    border-color: white;
    border-style: solid;
    border-collapse: collapse;
}
td {
    border-width: 1px;
    border-style: solid;
    border-color: white;
    border-collapse: collapse;
    width: 10%;
}
th {
    border-width: 2px;
    border-style: solid;
    border-color: white;
    border-collapse: collapse;
}
.birthday {
    background-color: yellow;
    color: black;
}
fieldset {
    border-width: 2px;
    border-style: solid;
    border-color: white;
    border-collapse: collapse;
}