/* ==========================================================================
   Work Leave Planner - Calendar Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   Calendar Container
   -------------------------------------------------------------------------- */
.calendar-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

/* --------------------------------------------------------------------------
   Month Card
   -------------------------------------------------------------------------- */
.month-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
}

.month-header {
    text-align: center;
    margin-bottom: var(--space-3);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-border-light);
}

.month-name {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    text-transform: capitalize;
}

/* --------------------------------------------------------------------------
   Weekday Labels
   -------------------------------------------------------------------------- */
.weekday-labels {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    margin-bottom: var(--space-2);
}

.weekday-label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-tertiary);
    text-align: center;
    padding: var(--space-1) 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.weekday-label--weekend {
    color: var(--color-weekend-text);
}

/* --------------------------------------------------------------------------
   Days Grid
   -------------------------------------------------------------------------- */
.days-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
}

/* --------------------------------------------------------------------------
   Day Cell
   -------------------------------------------------------------------------- */
.day-cell {
    position: relative;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-regular);
    color: var(--color-text-primary);
    background-color: transparent;
    border-radius: var(--radius-md);
    cursor: default;
    transition: background-color var(--transition-fast);
    user-select: none;
}

/* Empty cells (padding for month alignment) */
.day-cell--empty {
    visibility: hidden;
}

/* Weekend styling */
.day-cell--weekend {
    background-color: var(--color-weekend);
    color: var(--color-weekend-text);
}

/* Today indicator */
.day-cell--today {
    background-color: var(--color-today-bg);
    font-weight: var(--font-weight-semibold);
    box-shadow: inset 0 0 0 2px var(--color-today-ring);
}

/* Combined: Today + Weekend */
.day-cell--today.day-cell--weekend {
    background: linear-gradient(135deg, var(--color-today-bg) 50%, var(--color-weekend) 50%);
    box-shadow: inset 0 0 0 2px var(--color-today-ring);
}

/* Bank holiday styling */
.day-cell--bank-holiday {
    background-color: #fee2e2;
    color: #991b1b;
    font-weight: var(--font-weight-medium);
    position: relative;
}

.day-cell--bank-holiday::after {
    content: '';
    position: absolute;
    top: 2px;
    right: 2px;
    width: 6px;
    height: 6px;
    background-color: #ef4444;
    border-radius: 50%;
}

/* Combined: Bank holiday + Weekend (bank holidays take precedence visually) */
.day-cell--bank-holiday.day-cell--weekend {
    background-color: #fee2e2;
}

/* Combined: Bank holiday + Today */
.day-cell--bank-holiday.day-cell--today {
    background: linear-gradient(135deg, var(--color-today-bg) 50%, #fee2e2 50%);
    box-shadow: inset 0 0 0 2px var(--color-today-ring);
}

/* Tooltip for bank holiday names */
.day-cell--bank-holiday[data-tooltip] {
    cursor: help;
}

.day-cell--bank-holiday[data-tooltip]:hover::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-2) var(--space-3);
    background-color: var(--color-text-primary);
    color: var(--color-text-inverse);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
    border-radius: var(--radius-md);
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.day-cell--bank-holiday[data-tooltip]:hover::after {
    content: '';
    position: absolute;
    bottom: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--color-text-primary);
    z-index: 100;
}

/* --------------------------------------------------------------------------
   School Holiday Styling
   -------------------------------------------------------------------------- */
.day-cell--school-holiday {
    background-color: #dbeafe;
    color: #1e40af;
    font-weight: var(--font-weight-medium);
}

/* School holiday + weekend */
.day-cell--school-holiday.day-cell--weekend {
    background-color: #bfdbfe;
}

/* School holiday + bank holiday */
.day-cell--school-holiday.day-cell--bank-holiday {
    background: linear-gradient(135deg, #dbeafe 50%, #fee2e2 50%);
}

/* School holiday + today */
.day-cell--school-holiday.day-cell--today {
    box-shadow: inset 0 0 0 2px var(--color-today-ring);
}

/* --------------------------------------------------------------------------
   Leave Day Styling
   -------------------------------------------------------------------------- */
.day-cell--leave {
    background-color: #d1fae5;
    color: #065f46;
    font-weight: var(--font-weight-medium);
}

.day-cell--leave::after {
    content: '';
    position: absolute;
    top: 2px;
    right: 2px;
    width: 6px;
    height: 6px;
    background-color: #059669;
    border-radius: 50%;
}

/* Leave + weekend (shouldn't happen normally but style just in case) */
.day-cell--leave.day-cell--weekend {
    background-color: #a7f3d0;
}

/* Leave + school holiday */
.day-cell--leave.day-cell--school-holiday {
    background: linear-gradient(135deg, #d1fae5 50%, #dbeafe 50%);
}

/* Leave + bank holiday (with warning indication) */
.day-cell--leave.day-cell--bank-holiday {
    background: linear-gradient(135deg, #d1fae5 50%, #fee2e2 50%);
}

/* Leave + today */
.day-cell--leave.day-cell--today {
    box-shadow: inset 0 0 0 2px var(--color-today-ring);
}

/* --------------------------------------------------------------------------
   Blocked Day Styling (Non-bookable)
   -------------------------------------------------------------------------- */
.day-cell--blocked {
    background-color: #fed7aa;
    color: #9a3412;
    font-weight: var(--font-weight-medium);
}

.day-cell--blocked::after {
    content: '';
    position: absolute;
    top: 2px;
    right: 2px;
    width: 6px;
    height: 6px;
    background-color: #ea580c;
    border-radius: 50%;
}

/* Blocked + weekend */
.day-cell--blocked.day-cell--weekend {
    background-color: #fdba74;
}

/* Blocked + school holiday */
.day-cell--blocked.day-cell--school-holiday {
    background: linear-gradient(135deg, #fed7aa 50%, #dbeafe 50%);
}

/* Blocked + bank holiday */
.day-cell--blocked.day-cell--bank-holiday {
    background: linear-gradient(135deg, #fed7aa 50%, #fee2e2 50%);
}

/* Blocked + today */
.day-cell--blocked.day-cell--today {
    box-shadow: inset 0 0 0 2px var(--color-today-ring);
}

/* --------------------------------------------------------------------------
   Selection States (for drag selection)
   -------------------------------------------------------------------------- */
.day-cell--selecting {
    background-color: #93c5fd !important;
    color: #1e3a8a;
}

.day-cell--drag-start {
    box-shadow: inset 0 0 0 2px #3b82f6;
}

/* Cursor states for different modes */
.calendar-container--mode-school-holidays .day-cell:not(.day-cell--empty) {
    cursor: pointer;
}

.calendar-container--mode-school-holidays .day-cell:not(.day-cell--empty):hover {
    background-color: #e0f2fe;
}

.calendar-container--mode-school-holidays .day-cell--school-holiday:hover {
    background-color: #bfdbfe;
}

.calendar-container--mode-school-holidays .day-cell--weekend:not(.day-cell--school-holiday):hover {
    background-color: #fef3c7;
}

/* Book leave mode - hover states */
.calendar-container--mode-book-leave .day-cell:not(.day-cell--empty):not(.day-cell--weekend) {
    cursor: pointer;
}

.calendar-container--mode-book-leave .day-cell:not(.day-cell--empty):not(.day-cell--weekend):hover {
    background-color: #ecfdf5;
}

.calendar-container--mode-book-leave .day-cell--leave:hover {
    background-color: #a7f3d0;
}

.calendar-container--mode-book-leave .day-cell--bank-holiday:not(.day-cell--leave):hover {
    background-color: #fecaca;
}

/* Weekend is not clickable in leave mode */
.calendar-container--mode-book-leave .day-cell--weekend {
    cursor: not-allowed;
    opacity: 0.7;
}

/* Block Days Mode Hover States */
.calendar-container--mode-block-days .day-cell:not(.day-cell--empty):hover {
    background-color: #fdba74;
}

.calendar-container--mode-block-days .day-cell--blocked:hover {
    background-color: #fb923c;
}

/* Prevent text selection during drag */
.calendar-container--dragging {
    user-select: none;
}

.calendar-container--dragging .day-cell {
    cursor: crosshair;
}

/* Hover state for interactive cells (will be used in later phases) */
.day-cell--interactive:hover {
    background-color: var(--color-bg-tertiary);
    cursor: pointer;
}

.day-cell--interactive.day-cell--weekend:hover {
    background-color: #fde68a;
}

/* Focus state for accessibility */
.day-cell:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 1px;
    z-index: 1;
}

/* Partner leave styling */
.day-cell--partner-leave {
    background-color: #c4b5fd;
    color: #5b21b6;
}

/* Partner leave on top of your leave - show split */
.day-cell--leave.day-cell--partner-leave {
    background: linear-gradient(135deg, var(--color-leave) 50%, #c4b5fd 50%);
}

/* Partner leave mode hover states */
.calendar-container--mode-partner-leave .day-cell:not(.day-cell--empty):hover {
    background-color: #ddd6fe;
}

.calendar-container--mode-partner-leave .day-cell--partner-leave:hover {
    background-color: #a78bfa;
}

/* --------------------------------------------------------------------------
   Day Number
   -------------------------------------------------------------------------- */
.day-number {
    position: relative;
    z-index: 1;
}

/* --------------------------------------------------------------------------
   Month Stats (for future phases)
   -------------------------------------------------------------------------- */
.month-stats {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-border-light);
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

/* --------------------------------------------------------------------------
   Responsive: 3 columns on medium screens
   -------------------------------------------------------------------------- */
@media (max-width: 1200px) {
    .calendar-container {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-4);
    }
}

/* --------------------------------------------------------------------------
   Responsive: 2 columns on tablet
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
    .calendar-container {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
    }
    
    .month-card {
        padding: var(--space-3);
    }
}

/* --------------------------------------------------------------------------
   Responsive: 1 column on mobile
   -------------------------------------------------------------------------- */
@media (max-width: 600px) {
    .calendar-container {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .month-card {
        padding: var(--space-4);
    }
    
    .day-cell {
        font-size: var(--font-size-base);
    }
}

/* --------------------------------------------------------------------------
   Loading State
   -------------------------------------------------------------------------- */
.calendar-container--loading {
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.calendar-loading {
    font-size: var(--font-size-base);
    color: var(--color-text-tertiary);
}

/* --------------------------------------------------------------------------
   Print Styles (basic - to be expanded in Phase 6)
   -------------------------------------------------------------------------- */
@media print {
    .calendar-container {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-3);
    }
    
    .month-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}