body {
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    font-size: 10px;
    padding: 10px;
}

tr.months th {
    padding: 0;
    font-weight: normal;
    text-transform: uppercase;
}

td,
th {
    width: 20px;
    height: 20px;
}

th {
    color: rgba(0, 0, 0, 0.8);
    padding-right: 5px;
}

td {
    color: rgba(0, 0, 0, 0);
    box-shadow: inset 1px 1px 0 0 rgba(0, 0, 0, 0.25);
}

.b_0 {
    border: none;
    box-shadow: none;
}

.b_r {
    border-right: 2px solid #000;
}

.b_l {
    box-shadow: inset 0 1px 0 0 rgba(0, 0, 0, 0.2),
                inset 2px 0 0 0 #000;
}

.b_t {
    box-shadow: inset 1px 0 0 0 rgba(0, 0, 0, 0.2),
                inset 0 2px 0 0 #000;
}

.b_l.b_t {
    box-shadow: inset 2px 2px 0 0 #000;
}

.b_b {
    border-bottom: 2px solid #000;
}

.legend th,
.legend td {
    white-space: nowrap;
    text-align: left;
    border: none;
}

.legend th {
    padding-left: 5px;
}

table {
    float: left;
    margin-right: 30px;
}

.tt {
    position: relative;
    cursor: pointer;
}

.tt .ttt {
    visibility: hidden;
    width: 150px;
    background-color: rgba(0, 0, 0, 0.8);
    color: #fff;
    text-align: center;
    padding: 5px 0;
    border-radius: 6px;
    position: absolute;
    top: -5px;
    left: 110%;
    z-index: 1;
}

.tt .ttt::after {
    content: " ";
    position: absolute;
    top: 50%;
    right: 100%;
    margin-top: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: transparent black transparent transparent;
}

.tt:hover .ttt {
    visibility: visible;
}

.tt:hover {
    box-shadow: inset 0 0 15px 15px rgba(255, 255, 255, 0.5);
}