/* ========================================= */
/* 📅 ENHANCED CALENDAR.CSS - Smooth Scrolling & Visual Feedback */
/* ========================================= */

/* 🧭 GLOBAL COLORS */
:root {
    --color-primary: #2e3842;
    --color-secondary: #5a6772;
    --color-accent: #50bfe6;
    --color-bg: #f5f7fa;
    --color-text: #2e3842;
    --color-border: #e0e6ed;
    /* Enhanced Calendar Colors */
    --calendar-selection: rgba(80, 191, 230, 0.15);
    --calendar-selection-border: var(--color-accent);
    --calendar-selection-strong: rgba(80, 191, 230, 0.3);
    --calendar-other-month: #999;
    --calendar-weekend: #666;
    --calendar-today: var(--color-accent);
    --calendar-unavailable: #ccc;
    --calendar-hover: rgba(80, 191, 230, 0.1);
    /* Animation variables */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --shadow-selection: 0 2px 8px rgba(80, 191, 230, 0.3);
}

/* ========================================= */
/* 🧭 PERIOD NAVIGATION BAR */
/* ========================================= */
.revenue-period-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

.period-nav-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

.period-display {
    padding: 0.5rem 1rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    min-width: 200px;
    text-align: center;
    transition: all var(--transition-medium);
    user-select: none;
}

.period-display:hover {
    background: var(--color-bg);
    border-color: var(--color-accent);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.period-display.active {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
    box-shadow: var(--shadow-selection);
}

.nav-arrow {
    background: none;
    border: 1px solid var(--color-border);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: all var(--transition-medium);
}

.nav-arrow:hover {
    background: var(--color-accent);
    color: white;
    transform: scale(1.05);
    box-shadow: var(--shadow-selection);
}

.nav-arrow:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ========================================= */
/* 🎛️ QUICK BUTTONS */
/* ========================================= */
.quick-buttons-container {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.quick-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: white;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-medium);
    min-width: 80px;
    user-select: none;
}

.quick-btn:hover {
    background: var(--color-accent);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.quick-btn.active {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
    box-shadow: var(--shadow-selection);
}

/* ========================================= */
/* 📅 ENHANCED SCROLLABLE CALENDAR DROPDOWN */
/* ========================================= */
.calendar-dropdown {
    position: absolute;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    z-index: 1100;
    min-width: 350px;
    max-width: 400px;
    display: none;
    opacity: 0;
    transform: translateY(-10px) scale(0.98);
    transition: all var(--transition-medium);
    overflow: hidden;
}

.calendar-dropdown.show {
    display: block;
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* Enhanced Calendar Content - Smooth Scrolling */
.calendar-content {
    max-height: 60vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

.calendar-header-title {
    display: none !important;
}

/* Enhanced Months Container - Optimized for Smooth Scrolling */
.months-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem;
    margin-bottom: 60px;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--color-accent) transparent;

    /* Custom scrollbar for webkit browsers */
    &::-webkit-scrollbar {
        width: 6px;
    }

    &::-webkit-scrollbar-track {
        background: transparent;
    }

    &::-webkit-scrollbar-thumb {
        background: var(--color-accent);
        border-radius: 3px;
    }

    &::-webkit-scrollbar-thumb:hover {
        background: #3aa8c9;
    }
}

/* Smooth scrolling for webkit browsers */
.months-container::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: 3px;
}

.months-container::-webkit-scrollbar {
    width: 6px;
}

.months-container::-webkit-scrollbar-track {
    background: transparent;
}

/* Month wrapper with enhanced spacing */
.month-wrapper {
    margin-bottom: 24px;
    position: relative;
    transition: transform var(--transition-fast);
}

.month-wrapper:hover {
    transform: translateY(-1px);
}

/* Enhanced month header */
.calendar-month-header {
    text-align: center;
    font-weight: 600;
    margin: 12px 0 16px 0;
    color: var(--color-primary);
    font-size: 1.1rem;
    position: sticky;
    top: -1rem;
    background: white;
    z-index: 10;
    padding: 8px 0;
    border-radius: 6px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

/* Enhanced Calendar Grid */
.calendar-grid {
    display: grid;
    grid-template-columns: 40px repeat(7, 1fr);
    grid-template-rows: 40px repeat(6, 1fr);
    gap: 2px;
    background: var(--color-border);
    margin-bottom: 1.5rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.calendar-header {
    background: var(--color-secondary);
    color: white;
    font-weight: 600;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    text-transform: uppercase;
}

.calendar-header.week-header {
    font-size: 0.7rem;
    letter-spacing: 0.5px;
}

/* Enhanced Calendar Cells with Better Interactions */
.calendar-cell {
    background: white;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
    user-select: none;
    font-weight: 500;
}

.calendar-cell:hover {
    background: var(--calendar-hover);
    transform: scale(1.05);
    z-index: 5;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Week number cells */
.calendar-cell.week-number {
    background: var(--color-bg);
    color: var(--color-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: default;
}

.calendar-cell.week-number:hover {
    background: var(--color-bg);
    transform: none;
    box-shadow: none;
}

/* Other month days */
.calendar-cell.other-month {
    color: var(--calendar-other-month);
    background: #fafafa;
}

.calendar-cell.other-month:hover {
    background: #f0f0f0;
}

/* Weekend styling */
.calendar-cell.weekend {
    color: var(--calendar-weekend);
    font-weight: 600;
}

/* Unavailable dates */
.calendar-cell.unavailable {
    color: var(--calendar-unavailable);
    background: #f8f8f8;
    cursor: not-allowed;
    opacity: 0.5;
}

.calendar-cell.unavailable:hover {
    background: #f8f8f8;
    transform: none;
    box-shadow: none;
}

/* Enhanced Today indicator */
.calendar-cell.today {
    position: relative;
    font-weight: 700;
}

.calendar-cell.today::before {
    content: '';
    position: absolute;
    bottom: 3px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: var(--calendar-today);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: translateX(-50%) scale(1); opacity: 1; }
    50% { transform: translateX(-50%) scale(1.2); opacity: 0.7; }
    100% { transform: translateX(-50%) scale(1); opacity: 1; }
}

/* ========================================= */
/* 🎨 ENHANCED SELECTION STYLES */
/* ========================================= */

/* Single date selection - Prominent blue circle */
.calendar-cell.selection-single {
    background: var(--calendar-selection-border) !important;
    color: white !important;
    font-weight: 700;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-selection);
    transform: scale(1.1);
    z-index: 10;
}

.calendar-cell.selection-single::before {
    display: none;
}

/* Range start - Blue circle */
.calendar-cell.selection-start {
    background: var(--calendar-selection-border) !important;
    color: white !important;
    font-weight: 700;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-selection);
    z-index: 10;
    position: relative;
}

.calendar-cell.selection-start::before {
    display: none;
}

.calendar-cell.selection-start::after {
    content: '';
    position: absolute;
    right: -19px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 40px;
    background: var(--calendar-selection);
    z-index: -1;
}

/* Range end - Blue circle */
.calendar-cell.selection-end {
    background: var(--calendar-selection-border) !important;
    color: white !important;
    font-weight: 700;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-selection);
    z-index: 10;
    position: relative;
}

.calendar-cell.selection-end::before {
    display: none;
}

.calendar-cell.selection-end::after {
    content: '';
    position: absolute;
    left: -19px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 40px;
    background: var(--calendar-selection);
    z-index: -1;
}

/* Range fill - Subtle background */
.calendar-cell.selection-range {
    background: var(--calendar-selection) !important;
    color: var(--color-text);
    font-weight: 600;
    position: relative;
}

.calendar-cell.selection-range:hover {
    background: var(--calendar-selection-strong) !important;
}

/* Enhanced cut indicators for ranges extending beyond month */
.calendar-cell.selection-cut-left {
    background: var(--calendar-selection) !important;
    position: relative;
    border-left: 3px solid var(--calendar-selection-border);
}

.calendar-cell.selection-cut-right {
    background: var(--calendar-selection) !important;
    position: relative;
    border-right: 3px solid var(--calendar-selection-border);
}

/* ========================================= */
/* 📄 ENHANCED CALENDAR CONTROLS */
/* ========================================= */
.calendar-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    gap: 1rem;
    border-top: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    bottom: 0;
}

.calendar-btn {
    padding: 0.7rem 1.4rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: white;
    color: var(--color-text);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-medium);
    min-width: 90px;
    font-size: 0.9rem;
}

.calendar-btn:hover {
    background: var(--color-bg);
    border-color: var(--color-accent);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.calendar-btn.primary {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
    font-weight: 600;
}

.calendar-btn.primary:hover {
    background: #3aa8c9;
    border-color: #3aa8c9;
    box-shadow: var(--shadow-selection);
}

.calendar-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.calendar-btn:disabled:hover {
    background: white;
    border-color: var(--color-border);
}

.calendar-btn.primary:disabled:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

/* ========================================= */
/* 📱 RESPONSIVE ENHANCEMENTS */
/* ========================================= */
@media (max-width: 768px) {
    .revenue-period-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
        padding: 0.75rem 1rem;
    }

    .period-nav-right {
        justify-content: center;
    }

    .quick-buttons-container {
        justify-content: center;
        flex-wrap: wrap;
    }

    .calendar-dropdown {
        min-width: 320px;
        max-width: 90vw;
    }

    .calendar-cell {
        height: 38px;
        font-size: 0.9rem;
    }

    .months-container {
        padding: 0.75rem;
        margin-bottom: 70px;
    }

    .calendar-controls {
        padding: 0.75rem;
    }
}

@media (max-width: 480px) {
    .revenue-period-nav {
        padding: 0.5rem 0.75rem;
    }

    .quick-btn {
        min-width: 65px;
        padding: 0.4rem 0.7rem;
        font-size: 0.85rem;
    }

    .period-display {
        min-width: 160px;
        font-size: 0.9rem;
        padding: 0.4rem 0.8rem;
    }

    .calendar-dropdown {
        min-width: 300px;
        border-radius: 8px;
    }

    .calendar-cell {
        height: 36px;
        font-size: 0.85rem;
    }

    .calendar-cell.selection-start,
    .calendar-cell.selection-end,
    .calendar-cell.selection-single {
        width: 32px;
        height: 32px;
    }
}

/* ========================================= */
/* 🎭 LOADING AND ANIMATION STATES */
/* ========================================= */
.calendar-loading {
    opacity: 0.7;
    pointer-events: none;
}

.calendar-loading .month-wrapper {
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

/* Smooth entrance animation for new months */
.month-wrapper {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Enhanced focus states for accessibility */
.calendar-cell:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    z-index: 10;
}

.quick-btn:focus,
.calendar-btn:focus,
.period-display:focus,
.nav-arrow:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}