:root {
            --primary: #4361ee;
            --secondary: #3a0ca3;
            --accent: #f72585;
            --light: #f8f9fa;
            --dark: #212529;
            --success: #4cc9f0;
            --warning: #f9c74f;
            --gray: #6c757d;
            --border-radius: 12px;
            --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            color: var(--dark);
            min-height: 100vh;
            padding: 20px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
        }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .logo h1 {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
        }

        .logo-icon {
            font-size: 32px;
            color: var(--primary);
        }

        .save-status {
            background: var(--success);
            color: white;
            padding: 8px 15px;
            border-radius: 20px;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .user-info {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .user-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 20px;
        }

        .dashboard {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 25px;
            margin-bottom: 30px;
        }

        @media (max-width: 768px) {
            .dashboard {
                grid-template-columns: 1fr;
            }
        }

        .card {
            background: white;
            border-radius: var(--border-radius);
            padding: 25px;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }

        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .card-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary);
        }

        .card-icon {
            font-size: 24px;
            color: var(--secondary);
        }

        .time-display {
            font-size: 42px;
            font-weight: 700;
            text-align: center;
            margin: 20px 0;
            color: var(--secondary);
        }

        .progress-container {
            margin: 25px 0;
        }

        .progress-info {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
        }

        .progress-bar {
            height: 12px;
            background: #e9ecef;
            border-radius: 10px;
            overflow: hidden;
        }

        .progress {
            height: 100%;
            background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: 10px;
            width: 0%;
            transition: width 1s ease;
        }

        .controls {
            display: flex;
            gap: 15px;
            justify-content: center;
            margin: 20px 0;
            flex-wrap: wrap;
        }

        .btn {
            padding: 12px 25px;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        .btn-primary:hover {
            background: var(--secondary);
        }

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

        .btn-secondary:hover {
            background: #c1121f;
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: white;
        }

        .btn-success {
            background: var(--success);
            color: white;
        }

        .btn-success:hover {
            background: #2a9d8f;
        }

        .notes-section {
            margin-top: 30px;
        }

        .notes-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .notes-title {
            font-size: 22px;
            font-weight: 600;
            color: var(--primary);
        }

        .notes-input {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .notes-input input {
            flex: 1;
            min-width: 200px;
            padding: 15px;
            border: 2px solid #e9ecef;
            border-radius: var(--border-radius);
            font-size: 16px;
            transition: var(--transition);
        }

        .notes-input input:focus {
            outline: none;
            border-color: var(--primary);
        }

        .notes-list {
            max-height: 300px;
            overflow-y: auto;
            margin-bottom: 20px;
        }

        .note-item {
            background: #f8f9fa;
            padding: 15px;
            border-radius: var(--border-radius);
            margin-bottom: 15px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            animation: fadeIn 0.5s ease;
        }

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

        .note-time {
            font-size: 12px;
            color: var(--gray);
            white-space: nowrap;
            margin-left: 10px;
        }

        .stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-bottom: 30px;
        }

        @media (max-width: 768px) {
            .stats {
                grid-template-columns: 1fr;
            }
        }

        .stat-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 20px;
            text-align: center;
            box-shadow: var(--box-shadow);
        }

        .stat-value {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            margin: 10px 0;
        }

        .stat-label {
            color: var(--gray);
            font-size: 14px;
        }

        .data-management {
            margin-top: 30px;
            padding: 20px;
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }

        .data-title {
            font-size: 22px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 20px;
        }

        footer {
            text-align: center;
            margin-top: 50px;
            padding: 20px;
            color: var(--gray);
            font-size: 14px;
        }

        .motivation {
            font-style: italic;
            margin-top: 10px;
            color: var(--secondary);
        }