:root {
            --bg-color: #10111A;
            --bg-secondary: #191A23;
            --card-bg-color: rgba(36, 40, 68, 0.4);
            --card-bg-solid: #242844;
            --card-border-color: rgba(255, 255, 255, 0.1);
            --sidebar-bg: rgba(25, 26, 35, 0.6);
            --text-primary: #EAEAEA;
            --text-secondary: #8E91A4;
            --text-disabled: #555869;
            --accent-primary: #6C5CE7;
            --accent-secondary: #A29BFE;
            --accent-glow: rgba(108, 92, 231, 0.25);
            --accent-success: #00B894;
            --accent-danger: #D63031;
            --shadow-color: rgba(0, 0, 0, 0.3);
            --font-main: 'Manrope', sans-serif;
            --transition-fast: all 0.2s ease;
            --transition-medium: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        /* Reset and Base Styles */
        *, *::before, *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            font-size: 16px;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--bg-color);
            background-image: radial-gradient(circle at 10% 10%, rgba(108, 92, 231, 0.1), transparent 30%),
                              radial-gradient(circle at 90% 80%, rgba(36, 40, 68, 0.2), transparent 40%);
            color: var(--text-primary);
            overflow: hidden;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            padding: 2rem;
            perspective: 3000px;
        }
        
        @media (max-width: 1200px) {
            body {
                padding: 1rem;
                height: auto;
                overflow-y: auto;
            }
        }

        /* Main Dashboard Layout */
        .dashboard-wrapper {
            width: 100%;
            height: 95vh;
            max-width: 1800px;
            max-height: 1100px;
            display: flex;
            gap: 1.5rem;
            transform-style: preserve-3d;
            transition: var(--transition-medium);
        }
        
        @media (max-width: 1200px) {
            .dashboard-wrapper {
                flex-direction: column;
                height: auto;
                max-height: none;
                perspective: none;
                transform: none !important;
            }
        }

        /* Sidebar Navigation */
        .sidebar {
            flex-shrink: 0;
            width: 260px;
            padding: 1.5rem;
            background: var(--sidebar-bg);
            border: 1px solid var(--card-border-color);
            border-radius: 24px;
            backdrop-filter: blur(25px);
            -webkit-backdrop-filter: blur(25px);
            box-shadow: 0 10px 30px var(--shadow-color);
            display: flex;
            flex-direction: column;
            transform: translateZ(30px);
            transition: var(--transition-medium);
        }
        
        .sidebar:hover {
             transform: translateZ(40px) translateY(-5px);
        }
        
        @media (max-width: 1200px) {
            .sidebar {
                width: 100%;
                transform: none !important;
                flex-direction: row;
                align-items: center;
                padding: 1rem;
                gap: 1rem;
            }
        }
        
        @media (max-width: 768px) {
            .sidebar {
                flex-wrap: wrap;
            }
        }

        .sidebar-header {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding-bottom: 1.5rem;
            margin-bottom: 1.5rem;
            border-bottom: 1px solid var(--card-border-color);
        }
        
        @media (max-width: 1200px) {
            .sidebar-header {
                 padding-bottom: 0;
                 margin-bottom: 0;
                 border-bottom: none;
            }
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--accent-primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo-icon svg {
            width: 24px;
            height: 24px;
            stroke: white;
        }

        .logo-text {
            font-size: 1.5rem;
            font-weight: 700;
        }
        .logo-text span {
            color: var(--accent-primary);
        }
        
        @media (max-width: 768px) {
            .logo-text {
                 display: none;
            }
        }
        
        .nav-menu {
            list-style: none;
            flex-grow: 1;
        }
        
        @media (max-width: 1200px) {
            .nav-menu {
                display: flex;
                gap: 0.5rem;
                flex-grow: 1;
                justify-content: flex-start;
            }
        }

        .nav-item {
            margin-bottom: 0.5rem;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 0.8rem 1rem;
            border-radius: 12px;
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 600;
            position: relative;
            overflow: hidden;
            transition: var(--transition-fast);
        }

        .nav-link::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: var(--accent-glow);
            opacity: 0;
            transform: scale(0.8);
            transition: var(--transition-fast);
            border-radius: 12px;
        }

        .nav-link:hover::before,
        .nav-link.active::before {
            opacity: 1;
            transform: scale(1);
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--text-primary);
        }

        .nav-link svg {
            width: 22px;
            height: 22px;
            stroke: currentColor;
            transition: var(--transition-fast);
        }

        .sidebar-footer {
            margin-top: auto;
        }
        
        @media (max-width: 1200px) {
            .sidebar-footer {
                margin-top: 0;
                margin-left: auto;
            }
        }
        
        .user-profile-widget {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.75rem;
            background: rgba(0,0,0,0.2);
            border-radius: 12px;
        }
        .user-avatar-small {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid var(--accent-primary);
        }
        .user-info-small .name {
            font-weight: 600;
            font-size: 0.9rem;
        }
        .user-info-small .email {
            font-size: 0.75rem;
            color: var(--text-secondary);
        }

        /* Main Content Area */
        .main-content {
            flex-grow: 1;
            background: var(--bg-secondary);
            border-radius: 24px;
            box-shadow: 0 10px 30px var(--shadow-color);
            display: flex;
            flex-direction: column;
            overflow: hidden;
            position: relative;
        }

        .main-header {
            padding: 1.5rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--card-border-color);
            flex-shrink: 0;
        }

        .search-bar {
            position: relative;
            width: 40%;
            min-width: 250px;
        }
        .search-bar input {
            width: 100%;
            padding: 0.75rem 1rem 0.75rem 2.75rem;
            border-radius: 12px;
            border: 1px solid var(--card-border-color);
            background-color: var(--bg-color);
            color: var(--text-primary);
            font-size: 1rem;
            outline: none;
            transition: var(--transition-medium);
        }
        .search-bar input:focus {
            border-color: var(--accent-primary);
            box-shadow: 0 0 0 3px var(--accent-glow);
        }
        .search-icon {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            width: 20px;
            height: 20px;
            stroke: var(--text-secondary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        
        .notification-bell {
            position: relative;
            cursor: pointer;
            padding: 0.75rem;
            border-radius: 12px;
            transition: var(--transition-fast);
        }
        
        .notification-bell:hover {
            background-color: var(--card-bg-solid);
        }

        .notification-bell svg {
            width: 24px;
            height: 24px;
            stroke: var(--text-secondary);
        }
        
        .notification-count {
            position: absolute;
            top: 5px;
            right: 5px;
            width: 18px;
            height: 18px;
            background-color: var(--accent-danger);
            color: white;
            border-radius: 50%;
            font-size: 0.7rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid var(--bg-secondary);
        }

        /* Content Pages */
        .content-page {
            flex-grow: 1;
            padding: 2rem;
            overflow-y: auto;
            display: none; /* Hidden by default */
        }
        
        .content-page.active {
            display: block;
            animation: fadeIn 0.5s ease-out;
        }
        
        .page-grid {
            display: grid;
            gap: 1.5rem;
        }

        /* Overview Page Grid */
        #page-overview .page-grid {
            grid-template-columns: repeat(4, 1fr);
            grid-template-rows: auto auto 1fr;
            grid-template-areas:
                "stat1 stat2 stat3 stat4"
                "chart chart tasks tasks"
                "chart chart tasks tasks";
        }
        
        /* General Card Styles */
        .widget-card {
            background: var(--card-bg-solid);
            border-radius: 16px;
            padding: 1.5rem;
            border: 1px solid var(--card-border-color);
            display: flex;
            flex-direction: column;
            transition: var(--transition-medium);
        }
        
        .widget-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.2), 0 0 15px var(--accent-glow);
        }

        .widget-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1.25rem;
        }

        .widget-title {
            font-size: 1.1rem;
            font-weight: 600;
        }

        .widget-icon {
            width: 24px;
            height: 24px;
            stroke: var(--text-secondary);
        }
        
        /* Stat Cards */
        .stat-card {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        
        .stat-icon-wrapper {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .stat-icon-wrapper svg {
            width: 24px;
            height: 24px;
            stroke: white;
        }
        .stat-icon-wrapper.bg-purple { background-color: #8e44ad; }
        .stat-icon-wrapper.bg-green { background-color: #27ae60; }
        .stat-icon-wrapper.bg-blue { background-color: #2980b9; }
        .stat-icon-wrapper.bg-orange { background-color: #f39c12; }

        .stat-info .value {
            font-size: 1.75rem;
            font-weight: 700;
        }
        .stat-info .label {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* Chart Card (Analytics) */
        #chart-card { grid-area: chart; }
        
        .chart-container {
            width: 100%;
            height: 100%;
            min-height: 250px;
        }

        .chart-svg {
            width: 100%;
            height: 100%;
        }

        .chart-svg .grid-line {
            stroke: var(--card-border-color);
            stroke-width: 1;
            stroke-dasharray: 2 4;
        }

        .chart-svg .axis-label {
            fill: var(--text-secondary);
            font-size: 12px;
        }

        .chart-svg .bar {
            transition: all 0.5s ease-out;
            cursor: pointer;
        }

        .chart-svg .bar:hover {
            opacity: 0.8;
        }
        
        @keyframes draw-bar {
            from {
                height: 0;
                y: 220; /* initial y position at bottom */
            }
            to {
                /* height and y are set by JS */
            }
        }
        
        .tooltip {
            position: absolute;
            background-color: #000;
            color: #fff;
            padding: 8px 12px;
            border-radius: 8px;
            font-size: 14px;
            pointer-events: none;
            opacity: 0;
            transition: opacity 0.2s, transform 0.2s;
            transform: translate(-50%, -110%);
            white-space: nowrap;
        }
        
        .tooltip.visible {
            opacity: 1;
        }


        /* Tasks Card */
        #tasks-card { 
            grid-area: tasks;
            overflow: hidden;
        }
        
        .tasks-list {
            flex-grow: 1;
            overflow-y: auto;
            padding-right: 10px;
            margin-right: -10px;
        }

        .task-item {
            display: flex;
            align-items: center;
            padding: 1rem 0.5rem;
            border-bottom: 1px solid var(--card-border-color);
            transition: var(--transition-fast);
        }
        
        .task-item:last-child {
            border-bottom: none;
        }
        
        .task-item.completed .task-title {
            text-decoration: line-through;
            color: var(--text-secondary);
        }
        
        .task-checkbox {
            width: 20px;
            height: 20px;
            min-width: 20px;
            border-radius: 50%;
            border: 2px solid var(--text-secondary);
            cursor: pointer;
            margin-right: 1rem;
            display: flex;
            justify-content: center;
            align-items: center;
            transition: var(--transition-fast);
        }
        
        .task-checkbox svg {
            width: 12px;
            height: 12px;
            stroke: white;
            opacity: 0;
            transform: scale(0.5);
            transition: var(--transition-fast);
        }
        
        .task-item.completed .task-checkbox {
            background-color: var(--accent-success);
            border-color: var(--accent-success);
        }
        
        .task-item.completed .task-checkbox svg {
            opacity: 1;
            transform: scale(1);
        }
        
        .task-details {
            flex-grow: 1;
        }
        
        .task-title {
            font-weight: 500;
        }
        
        .task-due-date {
            font-size: 0.8rem;
            color: var(--text-secondary);
        }
        
        .task-priority {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            margin-left: 1rem;
        }
        .task-priority.high { background-color: var(--accent-danger); }
        .task-priority.medium { background-color: #f39c12; }
        .task-priority.low { background-color: var(--accent-success); }
        
        /* Calendar page and Component (FIXED DESIGN) */
        #page-calendar .page-grid {
             grid-template-columns: 3fr 1fr;
        }

        .calendar-widget {
            display: flex;
            flex-direction: column;
        }
        .calendar-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1.5rem;
        }
        .calendar-title { font-size: 1.25rem; font-weight: 700; }
        .calendar-nav-buttons button {
            background: none;
            border: none;
            color: var(--text-secondary);
            cursor: pointer;
            padding: 0.5rem;
            transition: var(--transition-fast);
        }
        .calendar-nav-buttons button:hover {
            color: var(--text-primary);
            background: var(--card-bg-solid);
            border-radius: 8px;
        }
        .calendar-nav-buttons button svg { width: 20px; height: 20px; stroke: currentColor; }

        .calendar-grid {
            display: grid;
            grid-template-columns: repeat(7, 1fr);
            gap: 0.5rem;
            flex-grow: 1;
        }
        .calendar-day-cell {
            aspect-ratio: 1 / 1;
            display: flex;
            justify-content: center;
            align-items: center;
            border-radius: 12px;
            font-weight: 500;
            cursor: pointer;
            position: relative;
            transition: var(--transition-fast);
        }
        .calendar-day-name {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.9rem;
            cursor: default;
        }
        .calendar-day-cell.other-month { color: var(--text-disabled); }
        .calendar-day-cell:not(.other-month):not(.calendar-day-name):hover {
            background-color: var(--accent-glow);
        }
        .calendar-day-cell.today {
            color: var(--accent-primary);
            font-weight: 700;
            border: 1px solid var(--accent-primary);
        }
        .calendar-day-cell.selected {
            background-color: var(--accent-primary);
            color: white !important;
            font-weight: 700;
            box-shadow: 0 0 15px var(--accent-glow);
        }
        .event-dot {
            position: absolute;
            bottom: 10%;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--accent-secondary);
        }
        .selected .event-dot {
            background-color: white;
        }
        
        /* Settings Page */
        #page-settings .page-grid {
            grid-template-columns: 250px 1fr;
        }
        .settings-nav {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .settings-nav a {
            padding: 0.8rem 1.2rem;
            color: var(--text-secondary);
            text-decoration: none;
            border-radius: 10px;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: var(--transition-fast);
        }
        .settings-nav a:hover {
            background-color: var(--card-bg-solid);
            color: var(--text-primary);
        }
        .settings-nav a.active {
            background-color: var(--card-bg-solid);
            color: var(--text-primary);
            border-left-color: var(--accent-primary);
        }
        
        .settings-content {
            padding-left: 2rem;
            border-left: 1px solid var(--card-border-color);
        }
        .settings-pane { display: none; }
        .settings-pane.active {
            display: block;
            animation: fadeIn 0.4s;
        }
        .settings-section {
            margin-bottom: 2.5rem;
        }
        .settings-section-header {
            padding-bottom: 0.8rem;
            margin-bottom: 1.5rem;
            border-bottom: 1px solid var(--card-border-color);
        }
        .settings-section-title { font-size: 1.5rem; font-weight: 700; }
        .settings-section-subtitle { color: var(--text-secondary); }
        .form-group {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0;
            border-bottom: 1px solid var(--card-border-color);
        }
        .form-group:last-of-type { border-bottom: none; }
        .form-label {
            display: flex;
            flex-direction: column;
        }
        .form-label-title { font-weight: 500; }
        .form-label-description { font-size: 0.9rem; color: var(--text-secondary); }
        .form-action {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        /* Form elements */
        .btn {
            display: inline-block;
            padding: 0.7rem 1.25rem;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition-fast);
            cursor: pointer;
            border: none;
        }
        .btn-primary {
            background: var(--accent-primary);
            color: white;
        }
        .btn-primary:hover {
            background-color: var(--accent-secondary);
            transform: translateY(-2px);
            box-shadow: 0 4px 15px var(--accent-glow);
        }
        .btn-secondary {
            background: var(--card-bg-solid);
            color: var(--text-primary);
            border: 1px solid var(--card-border-color);
        }
        .btn-secondary:hover {
            border-color: var(--accent-secondary);
        }
        
        .toggle-switch {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 28px;
        }
        .toggle-switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }
        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: var(--card-bg-solid);
            transition: .4s;
            border-radius: 34px;
        }
        .slider:before {
            position: absolute;
            content: "";
            height: 20px;
            width: 20px;
            left: 4px;
            bottom: 4px;
            background-color: var(--text-secondary);
            transition: .4s;
            border-radius: 50%;
        }
        input:checked + .slider {
            background-color: var(--accent-primary);
        }
        input:checked + .slider:before {
            background-color: white;
            transform: translateX(22px);
        }


        /* Keyframes */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @keyframes float {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-8px); }
            100% { transform: translateY(0px); }
        }
        
        /* Final Scrollbar Styling */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-secondary);
        }
        ::-webkit-scrollbar-thumb {
            background-color: var(--text-disabled);
            border-radius: 10px;
            border: 2px solid var(--bg-secondary);
        }
        ::-webkit-scrollbar-thumb:hover {
            background-color: var(--text-secondary);
        }