body { 
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
        background-color: #f9fafb;
    }
    
    /* Mobile Menu Button */
    .mobile-menu-btn {
        display: none;
        position: fixed;
        top: 16px;
        left: 16px;
        z-index: 50;
        background: white;
        padding: 8px;
        border-radius: 8px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        border: none;
        cursor: pointer;
        transition: all 0.2s;
    }
    
    .mobile-menu-btn:hover {
        background: #f3f4f6;
    }
    
    .mobile-menu-btn svg {
        width: 24px;
        height: 24px;
        color: #374151;
    }
    
    /* Sidebar */
    .sidebar {
        width: 280px;
        background: white;
        height: 100vh;
        position: fixed;
        left: 0;
        top: 0;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        z-index: 40;
        transition: transform 0.3s ease;
        overflow-y: auto;
    }
    
    .sidebar.closed {
        transform: translateX(-100%);
    }
    
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 35;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    .main-content {
        margin-left: 280px;
        min-height: 100vh;
        padding: 24px;
        transition: margin-left 0.3s ease;
    }
    
    .main-content.expanded {
        margin-left: 0;
    }
    
    .logo-section {
        padding: 24px;
        border-bottom: 1px solid #e5e7eb;
        position: relative;
    }
    
    .sidebar-close {
        display: none;
        position: absolute;
        top: 24px;
        right: 24px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 4px;
        border-radius: 4px;
        color: #6b7280;
    }
    
    .sidebar-close:hover {
        background: #f3f4f6;
        color: #374151;
    }
    
    .logo {
        font-size: 1.5rem;
        font-weight: bold;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    
    .nav-section {
        padding: 24px 0 120px 0;
    }
    
    .nav-item {
        display: flex;
        align-items: center;
        padding: 12px 24px;
        color: #6b7280;
        text-decoration: none;
        transition: all 0.2s;
        margin: 0 16px;
        border-radius: 8px;
        position: relative;
    }
    
    .nav-item:hover {
        background-color: #f3f4f6;
        color: #374151;
    }
    
    .nav-item.active {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
    }
    
    .nav-item svg {
        width: 20px;
        height: 20px;
        margin-right: 12px;
        flex-shrink: 0;
    }
    
    .upgrade-section {
        position: fixed;
        bottom: 24px;
        left: 16px;
        width: 248px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border-radius: 12px;
        padding: 16px;
        text-align: center;
    }
    
    .upgrade-section h3 {
        color: white;
        font-size: 0.875rem;
        font-weight: 600;
        margin: 0 0 8px 0;
    }
    
    .upgrade-section p {
        color: rgba(219, 234, 254, 0.8);
        font-size: 0.75rem;
        margin: 0 0 12px 0;
    }
    
    .upgrade-btn {
        background: white;
        color: #667eea;
        padding: 8px 16px;
        border-radius: 6px;
        font-size: 0.75rem;
        font-weight: 600;
        text-decoration: none;
        display: inline-block;
    }
    
    .upgrade-btn:hover {
        transform: translateY(-1px);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }
    
    /* Calendar Header */
    .calendar-page-header {
        background: white;
        border-radius: 12px;
        padding: 24px;
        margin-bottom: 24px;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 16px;
    }
    
    .calendar-page-title {
        display: flex;
        align-items: center;
        gap: 16px;
    }
    
    .calendar-page-title h1 {
        font-size: 1.875rem;
        font-weight: bold;
        color: #111827;
        margin: 0;
    }
    
    .starter-badge {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        padding: 4px 12px;
        border-radius: 20px;
        font-size: 0.75rem;
        font-weight: 600;
    }
    
    .calendar-actions {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
        align-items: center;
    }
    
    .new-appointment-btn {
        background: #667eea;
        color: white;
        padding: 10px 20px;
        border-radius: 8px;
        text-decoration: none;
        font-size: 0.875rem;
        font-weight: 500;
        transition: all 0.2s;
        display: flex;
        align-items: center;
        gap: 8px;
        border: none;
        cursor: pointer;
    }
    
    .new-appointment-btn:hover {
        background: #5b21b6;
        transform: translateY(-1px);
    }
    
    .appointment-counter {
        background: #f3f4f6;
        padding: 8px 16px;
        border-radius: 8px;
        font-size: 0.875rem;
        color: #374151;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    
    .counter-number {
        font-weight: 600;
        color: #667eea;
    }
    
    .counter-limit {
        color: #6b7280;
    }
    
    /* Calendar View Controls */
    .calendar-controls {
        background: white;
        border-radius: 12px;
        padding: 20px;
        margin-bottom: 24px;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 16px;
    }
    
    .view-switcher {
        display: flex;
        gap: 4px;
        background: #f3f4f6;
        padding: 4px;
        border-radius: 8px;
    }
    
    .view-btn {
        padding: 8px 16px;
        border: none;
        background: transparent;
        border-radius: 6px;
        font-size: 0.875rem;
        font-weight: 500;
        color: #6b7280;
        cursor: pointer;
        transition: all 0.2s;
    }
    
    .view-btn.active {
        background: white;
        color: #667eea;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    }
    
    .calendar-navigation {
        display: flex;
        align-items: center;
        gap: 16px;
    }
    
    .nav-btn {
        padding: 8px;
        border: 1px solid #e5e7eb;
        border-radius: 6px;
        background: white;
        cursor: pointer;
        transition: all 0.2s;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .nav-btn:hover {
        border-color: #667eea;
        background: #f8fafc;
    }
    
    .nav-btn svg {
        width: 16px;
        height: 16px;
        color: #6b7280;
    }
    
    .current-month {
        font-size: 1.125rem;
        font-weight: 600;
        color: #111827;
        min-width: 150px;
        text-align: center;
    }
    
    .today-btn {
        background: #667eea;
        color: white;
        border: none;
        padding: 8px 16px;
        border-radius: 6px;
        font-size: 0.875rem;
        font-weight: 500;
        cursor: pointer;
        transition: all 0.2s;
    }
    
    .today-btn:hover {
        background: #5b21b6;
    }
    
    /* Main Calendar */
    .calendar-main {
        background: white;
        border-radius: 12px;
        padding: 24px;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
        margin-bottom: 24px;
    }
    
    /* Calendar Grid */
    .calendar-container {
        border: 1px solid #e5e7eb;
        border-radius: 8px;
        overflow: hidden;
        background: white;
    }
    
    .calendar-weekdays {
        display: grid;
        grid-template-columns: repeat(7, 1fr);
        background: #f9fafb;
        border-bottom: 1px solid #e5e7eb;
    }
    
    .calendar-weekday {
        padding: 16px 12px;
        text-align: center;
        font-size: 0.875rem;
        font-weight: 600;
        color: #6b7280;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        border-right: 1px solid #e5e7eb;
    }
    
    .calendar-weekday:last-child {
        border-right: none;
    }
    
    .calendar-grid {
        display: grid;
        grid-template-columns: repeat(7, 1fr);
        background: white;
    }
    
    .calendar-day {
        min-height: 120px;
        border-right: 1px solid #e5e7eb;
        border-bottom: 1px solid #e5e7eb;
        padding: 12px;
        cursor: pointer;
        transition: all 0.2s;
        position: relative;
        background: white;
        display: flex;
        flex-direction: column;
    }
    
    .calendar-day:nth-child(7n) {
        border-right: none;
    }
    
    .calendar-day:hover {
        background: #f8fafc;
    }
    
    .calendar-day.other-month {
        background: #f9fafb;
        color: #d1d5db;
    }
    
    .calendar-day.other-month:hover {
        background: #f3f4f6;
    }
    
    .calendar-day.today {
        background: #eff6ff;
        border: 2px solid #3b82f6;
    }
    
    .calendar-day.today .calendar-day-number {
        background: #3b82f6;
        color: white;
    }
    
    .calendar-day-number {
        width: 32px;
        height: 32px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.875rem;
        font-weight: 500;
        color: #374151;
        margin-bottom: 8px;
        flex-shrink: 0;
    }
    
    .calendar-day.other-month .calendar-day-number {
        color: #d1d5db;
    }
    
    .calendar-appointments {
        display: flex;
        flex-direction: column;
        gap: 4px;
        flex: 1;
        overflow: hidden;
    }
    
    .calendar-appointment {
        background: #667eea;
        color: white;
        padding: 4px 8px;
        border-radius: 4px;
        font-size: 0.75rem;
        font-weight: 500;
        text-overflow: ellipsis;
        overflow: hidden;
        white-space: nowrap;
        cursor: pointer;
        transition: all 0.2s;
        border-left: 3px solid #4f46e5;
    }
    
    .calendar-appointment:hover {
        background: #5b21b6;
        transform: translateY(-1px);
    }
    
    .calendar-appointment.type-consultation {
        background: #f59e0b;
        border-left-color: #d97706;
    }
    
    .calendar-appointment.type-consultation:hover {
        background: #b45309;
    }
    
    .calendar-appointment.type-meeting {
        background: #10b981;
        border-left-color: #059669;
    }
    
    .calendar-appointment.type-meeting:hover {
        background: #047857;
    }
    
    .calendar-appointment.type-other {
        background: #8b5cf6;
        border-left-color: #7c3aed;
    }
    
    .calendar-appointment.type-other:hover {
        background: #6d28d9;
    }
    
    .appointment-more {
        font-size: 0.75rem;
        color: #6b7280;
        cursor: pointer;
        padding: 2px 4px;
        border-radius: 3px;
        transition: all 0.2s;
        text-align: center;
    }
    
    .appointment-more:hover {
        background: #e5e7eb;
        color: #374151;
    }
    
    /* Empty State */
    .calendar-empty-day {
        display: flex;
        align-items: center;
        justify-content: center;
        flex: 1;
        color: #d1d5db;
        font-size: 0.75rem;
        opacity: 0;
        transition: opacity 0.2s;
    }
    
    .calendar-day:hover .calendar-empty-day {
        opacity: 1;
    }
    
    /* Appointment Modal (placeholder) */
    .appointment-modal {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1000;
        display: none;
        align-items: center;
        justify-content: center;
        padding: 20px;
    }
    
    .modal-content {
        background: white;
        border-radius: 12px;
        padding: 24px;
        max-width: 500px;
        width: 100%;
        max-height: 80vh;
        overflow-y: auto;
    }
    
    .modal-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 20px;
        padding-bottom: 16px;
        border-bottom: 1px solid #e5e7eb;
    }
    
    .modal-title {
        font-size: 1.25rem;
        font-weight: 600;
        color: #111827;
        margin: 0;
    }
    
    .modal-close {
        background: none;
        border: none;
        font-size: 1.5rem;
        color: #6b7280;
        cursor: pointer;
        padding: 4px;
        border-radius: 4px;
    }
    
    .modal-close:hover {
        background: #f3f4f6;
        color: #374151;
    }
    
    /* Responsive Design */
    @media (max-width: 1024px) {
        .calendar-day {
            min-height: 100px;
        }
        
        .calendar-controls {
            flex-direction: column;
            align-items: stretch;
        }
        
        .calendar-navigation {
            justify-content: center;
        }
    }
    
    @media (max-width: 768px) {
        .mobile-menu-btn {
            display: block;
        }
        
        .sidebar-close {
            display: block;
        }
        
        .main-content {
            margin-left: 0;
            padding: 80px 16px 16px;
        }
        
        .sidebar {
            transform: translateX(-100%);
        }
        
        .sidebar.open {
            transform: translateX(0);
        }
        
        .calendar-page-header {
            flex-direction: column;
            align-items: stretch;
        }
        
        .calendar-actions {
            justify-content: space-between;
        }
        
        .calendar-day {
            min-height: 80px;
            padding: 8px;
        }
        
        .calendar-day-number {
            width: 28px;
            height: 28px;
            font-size: 0.75rem;
        }
        
        .calendar-appointment {
            padding: 2px 6px;
            font-size: 0.7rem;
        }
        
        .view-switcher {
            width: 100%;
            justify-content: center;
        }
    }
    
    @media (max-width: 480px) {
        .calendar-controls {
            padding: 16px;
        }
        
        .calendar-main {
            padding: 16px;
        }
        
        .calendar-day {
            min-height: 60px;
            padding: 6px;
        }
        
        .calendar-weekday {
            padding: 12px 8px;
            font-size: 0.75rem;
        }
    }