table {
    display: inline-block;
    border-spacing: 0;
    border-collapse: collapse;
    font-family: sans-serif;
    margin: 5% 35%;
}

caption {
    border: 1px solid #000;
    border-bottom: none;
    font-weight: bolder;
}

.days-off {
    color: rgb(255, 0, 0);
    font-weight: bold;
}

td, 
th {
    border: 1px solid #000;
    width: 30px;
    height: 30px;
    padding: 1px 5px;
    text-align: center;
}