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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            padding: 20px;
        }

        .container {
            max-width: 800px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            backdrop-filter: blur(10px);
        }

        h1 {
            text-align: center;
            color: #333;
            margin-bottom: 40px;
            font-size: 2.5rem;
            font-weight: 300;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
        }

        .add-task-form {
            display: flex;
            gap: 15px;
            margin-bottom: 40px;
            padding: 25px;
            background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            border-radius: 15px;
            box-shadow: 0 10px 20px rgba(240, 147, 251, 0.3);
        }

        .task-input {
            flex: 1;
            padding: 15px 20px;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            background: rgba(255, 255, 255, 0.9);
            color: #333;
            outline: none;
            transition: all 0.3s ease;
        }

        .task-input:focus {
            background: white;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }

        .add-btn {
            padding: 15px 30px;
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(79, 172, 254, 0.4);
        }

        .add-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(79, 172, 254, 0.6);
        }

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

        .filter-btn {
            padding: 12px 25px;
            background: rgba(255, 255, 255, 0.7);
            border: 2px solid transparent;
            border-radius: 25px;
            cursor: pointer;
            transition: all 0.3s ease;
            color: #666;
            font-weight: 500;
        }

        .filter-btn.active {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }

        .task-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .task-item {
            background: white;
            padding: 20px;
            border-radius: 15px;
            display: flex;
            align-items: center;
            gap: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            border-left: 5px solid #4facfe;
            position: relative;
            overflow: hidden;
        }

        .task-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
            transform: translateX(-100%);
            transition: transform 0.6s ease;
        }

        .task-item:hover::before {
            transform: translateX(100%);
        }

        .task-item:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }

        .task-item.completed {
            opacity: 0.7;
            border-left-color: #28a745;
            background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
        }

        .task-checkbox {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 3px solid #ddd;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            flex-shrink: 0;
        }

        .task-checkbox.checked {
            background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
            border-color: #28a745;
        }

        .task-checkbox.checked::after {
            content: '✓';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: white;
            font-weight: bold;
            font-size: 14px;
        }

        .task-text {
            flex: 1;
            font-size: 16px;
            color: #333;
            line-height: 1.4;
            word-break: break-word;
        }

        .task-text.completed {
            text-decoration: line-through;
            color: #666;
        }

        .task-text.editing {
            border: 2px solid #4facfe;
            border-radius: 8px;
            padding: 8px 12px;
            background: white;
            outline: none;
        }

        .task-actions {
            display: flex;
            gap: 10px;
            flex-shrink: 0;
        }

        .edit-btn, .delete-btn {
            padding: 8px 12px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .edit-btn {
            background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
            color: #8b4513;
        }

        .edit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 10px rgba(252, 182, 159, 0.4);
        }

        .delete-btn {
            background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
            color: #dc3545;
        }

        .delete-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 10px rgba(255, 154, 158, 0.4);
        }

        .empty-state {
            text-align: center;
            padding: 60px 20px;
            color: #666;
            font-size: 18px;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: 15px;
            border: 2px dashed #dee2e6;
        }

        .task-stats {
            display: flex;
            justify-content: space-around;
            margin-bottom: 30px;
            padding: 20px;
            background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(168, 237, 234, 0.3);
        }

        .stat-item {
            text-align: center;
            color: #333;
        }

        .stat-number {
            font-size: 2rem;
            font-weight: bold;
            margin-bottom: 5px;
            color: #4facfe;
        }

        .stat-label {
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: #666;
        }

        @media (max-width: 600px) {
            .container {
                padding: 20px;
                margin: 10px;
            }

            .add-task-form {
                flex-direction: column;
            }

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

            .task-actions {
                flex-direction: column;
            }

            .task-stats {
                flex-direction: column;
                gap: 15px;
            }
        }