/* default 16px */
.ztvc-icon-all,
.ztvc-icon-month,
.ztvc-icon-week,
.ztvc-icon-today,
.ztvc-icon-yesterday {
    width: 16px;
    height: 16px;
    background: url(default.png) no-repeat top left;
    text-indent: -999em;
}

.ztvc-icon-all {
    background-position: 0 0;
}

.ztvc-icon-month {
    background-position: -32px 0;
}

.ztvc-icon-week {
    background-position: -64px 0;
}

.ztvc-icon-today {
    background-position: -128px 0;
}

.ztvc-icon-yesterday {
    background-position: -192px 0;
}