body {
    font-family: sans-serif;
    background-color: #f4f4f4;
    color: #333;
    margin: 0;
    padding: 20px;
}

h1 {
    text-align: center;
    color: #555;
    font-size: 1.5em;
}

#legend {
    max-width: 600px;
    margin: 8px auto;
    padding: 6px;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.legend-item {
    display: inline-flex;
    margin: 0px 4px;
    align-items: center;
    font-size: 0.6em;
    cursor: default;
    transition: opacity 0.2s ease;
}

.legend-color {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 3px;
    margin-right: 2px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
}

/* Style for the count */
.legend-count {
    font-size: 0.9em;
    color: #666;
    margin-left: 6px;
    font-weight: normal;
    white-space: nowrap;
}
.legend-color.weekend-legend {
    background-color: #e0e0e0;
}
.legend-color.holiday-cl-irr {
    background-color: #c0392b;
}
.legend-color.holiday-cl-civ {
    background-color: #2980b9;
}
.legend-color.holiday-cl-rel {
    background-color: #8e44ad;
}
.legend-color.holiday-us-fed {
    background-color: #27ae60;
}

#calendar-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 8px;
    max-width: 1600px;
    margin: 20px auto;
    transition: opacity 0.3s ease;
}

.month {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 8px;
    display: flex;
    flex-direction: column;
    transition: opacity 0.3s ease;
}

.month-title {
    text-align: center;
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 1em;
    color: #0056b3;
}

.days-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 3px;
    flex-grow: 1;
}

.day-header {
    font-weight: bold;
    text-align: center;
    font-size: 0.75em;
    color: #666;
    padding-bottom: 2px;
    transition: opacity 0.3s ease;
}

.day {
    border: 1px solid #eee;
    min-height: 24px;
    padding: 3px;
    text-align: right;
    font-size: 0.6em;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-end;
    transition: opacity 0.3s ease, background-color 0.2s ease, border 0.2s ease;
    box-sizing: border-box;
}

.day span {
    padding: 2px 4px;
    border-radius: 3px;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.empty-day {
    background-color: #f9f9f9;
    border: 1px solid #f0f0f0;
}

.weekend span {
    background-color: #e0e0e0;
    color: #555;
}

.holiday {
    cursor: help;
}

.holiday span {
    color: white;
    font-weight: bold;
}

.holiday-cl-irr span {
    background-color: #c0392b;
}
.holiday-cl-civ span {
    background-color: #2980b9;
}
.holiday-cl-rel span {
    background-color: #8e44ad;
}
.holiday-us-fed span {
    background-color: #27ae60;
}

.holiday-overlap {
    border: 2px dashed #555;
}

#calendar-container.is-highlighting .day,
#calendar-container.is-highlighting .day-header,
#calendar-container.is-highlighting .month-title {
    opacity: 0.25;
}

#calendar-container.is-highlighting .empty-day {
    opacity: 0.15;
}

#calendar-container.is-highlighting .day.highlight-active {
    opacity: 1;
}

#calendar-container.is-highlighting .day.highlight-active.holiday-overlap {
    opacity: 1;
    border-color: #000;
}

#legend:has(:hover) .legend-item:not(:hover) {
    opacity: 0.6;
}

.day[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 105%;
    left: 50%;
    transform: translateX(-50%);
    background-color: #333;
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.85em;
    white-space: normal;
    width: max-content;
    max-width: 200px;
    text-align: center;
    z-index: 10;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    pointer-events: none;
    white-space: pre-line;
}

.day[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
}

.day.current-day span {
    font-weight: bold;
    color: #0056b3;
    background-color: #e7f3ff;
    outline: 2px solid #007bff;
    position: relative;
    z-index: 1;
}


#calendar-container.is-highlighting .day.current-day {
    opacity: 1;
}
#calendar-container.is-highlighting .day.current-day:not(.highlight-active) {
    opacity: 0.6;
}

.day.past-day::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom right,
        transparent 0%,
        transparent 45%,
        rgba(180, 180, 180, 0.7) calc(45% + 1px),
        rgba(180, 180, 180, 0.7) 50%,
        rgba(180, 180, 180, 0.7) calc(55% - 1px),
        transparent 55%,
        transparent 100%
    );
    background-repeat: no-repeat;
    pointer-events: none;
    z-index: 2;
}