:root {
    --fc-primary: #1a73e8;
    --fc-primary-hover: #1557b0;
    --fc-text: #3c4043;
    --fc-border: #dadce0;
    --fc-bg: #ffffff;
    --fc-bg-hover: #f1f3f4;
    --fc-today-bg: #e8f0fe;
    
    /* Sidebar */
    --sidebar-width: 256px;
    --sidebar-bg: #ffffff;
}

[data-bs-theme="dark"] {
    --fc-text: #e8eaed;
    --fc-border: #5f6368;
    --fc-bg: #202124;
    --fc-bg-hover: #303134;
    --fc-today-bg: #3c4043;
    --sidebar-bg: #202124;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--fc-text);
    overflow: hidden; /* App-like layout */
}

/* Typography Enhancements */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
}

/* Utility buttons */
.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--bs-body-color);
    border-radius: 50%;
    transition: background-color 0.2s;
}

.btn-icon:hover {
    background-color: var(--fc-bg-hover);
}

/* Forms & Inputs */
.search-input {
    box-shadow: none !important;
}
.search-input:focus {
    background-color: var(--bs-body-bg) !important;
    border-color: var(--bs-body-bg) !important;
}

/* Authentication Pages */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--fc-bg-hover);
}

.auth-card {
    width: 100%;
    max-width: 450px;
    border-radius: 1rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border: 1px solid var(--fc-border);
}

/* App Layout */
.app-container {
    display: flex;
    flex: 1;
    height: calc(100vh - 64px); /* Header height approx */
    overflow: hidden;
}

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--fc-border);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    overflow-y: auto;
    z-index: 1040;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    background-color: var(--fc-bg);
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--fc-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.4);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    z-index: 1050;
    border: none;
}
.fab:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 16px rgba(26, 115, 232, 0.5);
    color: white;
}

/* Calendar Grid Custom Styles */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    grid-auto-rows: minmax(100px, 1fr);
    flex: 1;
    overflow-y: auto;
    border-top: 1px solid var(--fc-border);
    border-left: 1px solid var(--fc-border);
}

.calendar-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-weight: 500;
    font-size: 13px;
    color: #70757a;
    padding: 10px 0;
    border-bottom: 1px solid var(--fc-border);
}

.calendar-cell {
    border-right: 1px solid var(--fc-border);
    border-bottom: 1px solid var(--fc-border);
    padding: 5px;
    /* min-height: 120px; */
    position: relative;
    transition: background-color 0.2s;
}

#mainCalendarGrid .calendar-cell:hover,
#weekCalendarGrid .calendar-cell:hover {
    background-color: var(--fc-bg-hover);
}

.calendar-cell.today {
    background-color: var(--fc-today-bg);
}

.date-number {
    display: inline-block;
    width: 28px;
    height: 28px;
    line-height: 28px;
    text-align: center;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    margin-bottom: 5px;
}
.date-number:hover {
    background-color: var(--fc-border);
}
.today .date-number {
    background-color: var(--fc-primary);
    color: white;
}

/* Event Chips */
.event-chip {
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 4px;
    margin-bottom: 3px;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    background-color: #039be5;
    color: white;
    font-weight: 500;
    transition: opacity 0.2s;
}
.event-chip:hover {
    opacity: 0.9;
}

/* Mini Calendar */
.mini-calendar {
    padding: 15px;
}
.mini-cal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.mini-cal-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-size: 12px;
}
.mini-cal-day {
    padding: 5px 0;
    color: #70757a;
}
.mini-cal-date {
    width: 24px;
    height: 24px;
    line-height: 24px;
    margin: 2px auto;
    border-radius: 50%;
    cursor: pointer;
}
.mini-cal-date:hover {
    background-color: var(--fc-bg-hover);
}
.mini-cal-date.active {
    background-color: var(--fc-primary-hover);
    color: white;
}

@media (max-width: 991px) {
    .sidebar {
        position: absolute;
        top: 0;
        left: 0;
        height: 100%;
        transform: translateX(-100%);
        box-shadow: 0 0 15px rgba(0,0,0,0.1);
    }
    .sidebar.show {
        transform: translateX(0);
    }
}

@media (min-width: 992px) {
    .sidebar.collapsed-desktop {
        margin-left: calc(-1 * var(--sidebar-width));
    }
    #sidebarToggle {
        display: inline-flex !important;
    }
}

/* Mobile Adjustments */
@media (max-width: 767.98px) {
    .calendar-cell {
        min-height: 70px;
        padding: 2px;
    }
    .date-number {
        width: 22px;
        height: 22px;
        line-height: 22px;
        font-size: 11px;
    }
    .event-chip {
        font-size: 9px;
        padding: 1px 3px;
        margin-bottom: 1px;
    }
    #btnToday {
        display: none !important;
    }
    #currentDateLabel {
        font-size: 1rem !important;
    }
    .navbar > .container-fluid {
        flex-wrap: wrap;
    }
    .date-controller-wrapper {
        order: 3;
        width: 100%;
        margin-top: 10px;
        justify-content: space-between !important;
        padding-left: 0 !important;
        padding-right: 0 !important;
    }
    .right-toolbar-wrapper {
        order: 2;
        margin-left: auto;
    }
    .navbar-brand {
        margin-right: 0;
    }
}

/* Calendar Navigation Animations */
.calendar-animate-next {
    animation: slideUpFadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.calendar-animate-prev {
    animation: slideDownFadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes slideUpFadeIn {
    0% { opacity: 0; transform: translateY(15px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes slideDownFadeIn {
    0% { opacity: 0; transform: translateY(-15px); }
    100% { opacity: 1; transform: translateY(0); }
}

.day-event-item {
    transition: background-color 0.15s ease;
    border-bottom: 1px solid var(--fc-border);
}

.day-event-item:last-child {
    border-bottom: none;
}

.day-event-item:hover {
    background-color: var(--fc-bg-hover) !important;
}

[data-bs-theme="dark"] .day-event-item {
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

.day-event-time {
    color: var(--fc-primary) !important;
    display: inline-flex;
    align-items: center;
}

.day-event-dot {
    opacity: 0.8;
}