:root {
            --primary: #4361ee;
            --secondary: #3a0ca3;
            --accent: #4cc9f0;
            --success: #4ade80;
            --light: #f8f9fa;
            --dark: #212529;
            --card-bg: #ffffff;
            --shadow: rgba(67, 97, 238, 0.15);
            --motivational: linear-gradient(135deg, #4361ee, #3a0ca3);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Poppins', sans-serif;
            background: var(--light);
            color: var(--dark);
            min-height: 100vh;
            padding: 20px;
            display: flex;
            justify-content: center;
            align-items: center;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><circle cx="10" cy="10" r="1" fill="%234cc9f020"/><circle cx="30" cy="30" r="1" fill="%234cc9f020"/><circle cx="50" cy="70" r="1" fill="%234cc9f020"/><circle cx="90" cy="90" r="1" fill="%234cc9f020"/><circle cx="70" cy="40" r="1" fill="%234cc9f020"/></svg>');
        }

        .container {
            width: 100%;
            max-width: 1000px;
            background: var(--card-bg);
            border-radius: 20px;
            box-shadow: 0 15px 40px var(--shadow);
            overflow: hidden;
            position: relative;
            display: grid;
            grid-template-columns: 1fr 1.5fr;
            min-height: 700px;
        }

        .motivational-panel {
            background: var(--motivational);
            padding: 40px 30px;
            color: white;
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .header {
            position: relative;
            z-index: 2;
        }

        .header h1 {
            font-family: 'Montserrat', sans-serif;
            font-size: 2.5rem;
            margin-bottom: 10px;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
        }

        .header p {
            font-size: 1.1rem;
            opacity: 0.9;
            margin-bottom: 30px;
            max-width: 300px;
        }

        .quote-container {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 15px;
            padding: 20px;
            margin: 20px 0;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .quote {
            font-style: italic;
            font-size: 1.2rem;
            margin-bottom: 10px;
        }

        .author {
            text-align: right;
            font-weight: 600;
        }

        .achievements {
            margin-top: 30px;
        }

        .achievements h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .badges {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .badge {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.2);
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 1.8rem;
            backdrop-filter: blur(5px);
            border: 1px solid rgba(255, 255, 255, 0.3);
        }

        .stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-top: 20px;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 10px;
            padding: 15px;
            text-align: center;
            backdrop-filter: blur(5px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            margin: 5px 0;
        }

        .stat-label {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        .pattern {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.1;
            z-index: 1;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><path d="M20,20 Q40,5 50,30 T80,20" stroke="white" fill="none"/><circle cx="30" cy="70" r="5" fill="white"/><circle cx="70" cy="50" r="8" fill="white"/></svg>');
            background-size: 300px;
        }

        .app-body {
            padding: 30px;
            display: flex;
            flex-direction: column;
        }

        .input-section {
            display: flex;
            gap: 15px;
            margin-bottom: 30px;
            position: relative;
        }

        .task-input {
            flex: 1;
            padding: 15px 20px;
            border: none;
            border-radius: 50px;
            font-size: 1rem;
            background: var(--light);
            box-shadow: 0 5px 15px var(--shadow);
            transition: all 0.3s ease;
            border: 2px solid #e9ecef;
        }

        .task-input:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 5px 20px rgba(76, 201, 240, 0.3);
        }

        .add-btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            box-shadow: 0 5px 15px rgba(67, 97, 238, 0.4);
            transition: all 0.3s ease;
        }

        .add-btn:hover {
            background: #3651d1;
            transform: translateY(-2px);
        }

        .filter-section {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-bottom: 30px;
        }

        .filter-btn {
            background: white;
            border: none;
            padding: 10px 20px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            cursor: pointer;
            box-shadow: 0 5px 10px var(--shadow);
            transition: all 0.3s ease;
            border: 2px solid #e9ecef;
        }

        .filter-btn.active {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
        }

        .tasks-container {
            flex: 1;
            overflow-y: auto;
            padding-right: 10px;
        }

        .task-card {
            background: var(--card-bg);
            border-radius: 15px;
            padding: 20px;
            box-shadow: 0 5px 15px var(--shadow);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            margin-bottom: 15px;
            border-left: 4px solid var(--primary);
            display: flex;
            align-items: center;
        }

        .task-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(67, 97, 238, 0.2);
        }

        .task-card.completed {
            background: #f0f7ff;
            border-left-color: var(--success);
            animation: celebrate 0.5s ease;
        }

        @keyframes celebrate {
            0% {
                transform: scale(1);
            }

            50% {
                transform: scale(1.03);
            }

            100% {
                transform: scale(1);
            }
        }

        .task-card.completed .task-text {
            text-decoration: line-through;
            opacity: 0.7;
        }

        .task-check {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid #dee2e6;
            margin-right: 15px;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            transition: all 0.3s ease;
            flex-shrink: 0;
        }

        .task-card.completed .task-check {
            background: var(--success);
            border-color: var(--success);
            color: white;
        }

        .task-text {
            flex: 1;
            font-size: 1.1rem;
            word-break: break-word;
        }

        .task-actions {
            display: flex;
            gap: 10px;
            margin-left: 15px;
        }

        .task-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.9rem;
            background: #e9ecef;
            color: var(--dark);
        }

        .task-btn:hover {
            background: var(--accent);
            color: white;
        }

        .empty-state {
            text-align: center;
            padding: 40px 20px;
        }

        .empty-state i {
            font-size: 5rem;
            color: var(--accent);
            margin-bottom: 20px;
            opacity: 0.5;
        }

        .empty-state h3 {
            font-size: 1.5rem;
            margin-bottom: 10px;
            color: var(--primary);
        }

        .empty-state p {
            color: var(--dark);
            opacity: 0.7;
            max-width: 300px;
            margin: 0 auto;
        }

        .progress-container {
            margin-top: 20px;
            background: #e9ecef;
            border-radius: 10px;
            height: 10px;
            overflow: hidden;
        }

        .progress-bar {
            height: 100%;
            background: var(--success);
            border-radius: 10px;
            width: 0%;
            transition: width 0.5s ease;
        }

        .progress-text {
            display: flex;
            justify-content: space-between;
            margin-top: 5px;
            font-size: 0.9rem;
            color: #6c757d;
        }

        .motivational-text {
            font-size: 1.8rem;
            font-weight: 800;
            font-family: 'Montserrat', sans-serif;
            margin-top: 20px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-align: center;
            line-height: 1.3;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% {
                transform: scale(1);
            }

            50% {
                transform: scale(1.02);
            }

            100% {
                transform: scale(1);
            }
        }

        .completed-animation {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 5rem;
            z-index: 1000;
            animation: celebration 1s ease-out forwards;
            pointer-events: none;
        }

        @keyframes celebration {
            0% {
                opacity: 0;
                transform: translate(-50%, -50%) scale(0.5);
            }

            50% {
                opacity: 1;
                transform: translate(-50%, -50%) scale(1.5);
            }

            100% {
                opacity: 0;
                transform: translate(-50%, -50%) scale(2);
            }
        }

        /* Responsive Design Improvements */
        @media (max-width: 1024px) {
            .container {
                grid-template-columns: 1fr;
                max-width: 800px;
            }

            .motivational-panel {
                display: flex;
                flex-direction: row;
                padding: 25px;
            }

            .header {
                flex: 1;
                padding-right: 20px;
            }

            .achievements {
                flex: 1;
                margin-top: 0;
            }

            .stats {
                grid-template-columns: 1fr;
            }

            .motivational-text {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            .container {
                min-height: auto;
            }

            .motivational-panel {
                flex-direction: column;
                padding: 25px;
            }

            .header {
                padding-right: 0;
            }

            .achievements {
                margin-top: 25px;
            }

            .stats {
                grid-template-columns: 1fr 1fr;
            }

            .app-body {
                padding: 25px 20px;
            }

            .motivational-text {
                font-size: 1.4rem;
                margin-top: 15px;
            }
        }

        @media (max-width: 600px) {
            body {
                padding: 15px;
            }

            .container {
                border-radius: 15px;
            }

            .motivational-panel {
                padding: 20px;
            }

            .header h1 {
                font-size: 2rem;
            }

            .header p {
                font-size: 1rem;
            }

            .quote-container {
                padding: 15px;
            }

            .quote {
                font-size: 1.1rem;
            }

            .achievements h3 {
                font-size: 1.2rem;
            }

            .badge {
                width: 50px;
                height: 50px;
                font-size: 1.5rem;
            }

            .app-body {
                padding: 20px 15px;
            }

            .input-section {
                flex-direction: column;
                gap: 12px;
                margin-bottom: 25px;
            }

            .add-btn {
                padding: 15px;
            }

            .filter-section {
                flex-wrap: wrap;
            }

            .filter-btn {
                padding: 8px 15px;
                font-size: 0.85rem;
            }

            .task-card {
                padding: 15px;
            }

            .task-text {
                font-size: 1rem;
            }

            .empty-state i {
                font-size: 4rem;
            }

            .empty-state h3 {
                font-size: 1.3rem;
            }

            .motivational-text {
                font-size: 1.3rem;
            }
        }

        @media (max-width: 480px) {
            .container {
                border-radius: 12px;
            }

            .motivational-panel {
                padding: 18px;
            }

            .header h1 {
                font-size: 1.7rem;
            }

            .quote {
                font-size: 1rem;
            }

            .achievements h3 {
                font-size: 1.1rem;
            }

            .stats {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .stat-card {
                padding: 12px;
            }

            .stat-value {
                font-size: 1.8rem;
            }

            .app-body {
                padding: 18px 12px;
            }

            .task-card {
                padding: 12px;
            }

            .task-check {
                width: 24px;
                height: 24px;
                margin-right: 10px;
            }

            .task-btn {
                width: 32px;
                height: 32px;
                font-size: 0.8rem;
            }

            .motivational-text {
                font-size: 1.1rem;
            }
        }

        @media (max-width: 360px) {
            .container {
                padding: 0;
            }

            .header h1 {
                font-size: 1.5rem;
            }

            .header p {
                font-size: 0.9rem;
            }

            .quote {
                font-size: 0.95rem;
            }

            .stat-value {
                font-size: 1.6rem;
            }

            .filter-btn {
                padding: 7px 12px;
                font-size: 0.8rem;
            }

            .task-text {
                font-size: 0.95rem;
            }

            .motivational-text {
                font-size: 1rem;
            }
        }

        /* Cross-browser compatibility */
        @supports (-webkit-backdrop-filter: none) or (backdrop-filter: none) {
            .quote-container,
            .stat-card,
            .badge {
                -webkit-backdrop-filter: blur(10px);
                backdrop-filter: blur(10px);
            }
        }

        /* Fallback for browsers that don't support backdrop-filter */
        @supports not ((-webkit-backdrop-filter: none) or (backdrop-filter: none)) {
            .quote-container,
            .stat-card,
            .badge {
                background: rgba(255, 255, 255, 0.3);
            }
        }

        /* Print styles */
        @media print {
            body {
                padding: 0;
                background: white;
            }

            .container {
                box-shadow: none;
                border-radius: 0;
                max-width: 100%;
                grid-template-columns: 1fr;
                min-height: auto;
            }

            .motivational-panel {
                display: none;
            }

            .add-btn, .filter-section, .task-btn {
                display: none;
            }

            .progress-container {
                display: none;
            }

            .motivational-text {
                display: none;
            }

            .task-input {
                display: none;
            }

            .task-card {
                box-shadow: none;
                border-left: 4px solid var(--primary);
                page-break-inside: avoid;
            }
        }