.annual-calendar th {
    background-color: #f2f2f2;
    position: sticky;
    top: 0;
    z-index: 10;
}

.annual-calendar th:first-child,
.annual-calendar th:nth-child(2) {
    position: sticky;
    left: 0;
    z-index: 11;
    background-color: #f2f2f2;
}

.annual-calendar th:nth-child(2) {
    left: 80px;
}

.annual-calendar .month-label {
    writing-mode: vertical-lr;
    text-orientation: mixed;
    white-space: nowrap;
    padding: 10px 5px;
    background-color: #f2f2f2;
    font-weight: bold;
    position: sticky;
    left: 0;
    z-index: 11;
}

.annual-calendar .fortnight-label {
    background-color: #f2f2f2;
    font-weight: bold;
    position: sticky;
    left: 80px;
    z-index: 11;
}

/* Estilos para células de intervenção */
.annual-calendar .intervention-cell {
    cursor: pointer;
    transition: background-color 0.2s;
}

.annual-calendar .intervention-cell:hover {
    opacity: 0.8;
    box-shadow: inset 0 0 0 2px rgba(0,0,0,0.3);
}