
        *, :root {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #0d1117 0%, #161b22 100%);
            color: #c9d1d9;
            line-height: 1.6;
            padding: 20px;
            min-height: 100vh;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        header {
            text-align: center;
            padding: 30px 0;
            margin-bottom: 30px;
        }
        
        h1 {
            font-size: 2.5rem;
            color: #58a6ff;
            margin-bottom: 10px;
        }
        
        .subtitle {
            font-size: 1.2rem;
            color: #8b949e;
            margin-bottom: 20px;
        }
        
        .cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin-bottom: 40px;
        }
        
        .card {
            background: #21262d;
            border-radius: 10px;
            padding: 25px;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
            transition: transform 0.3s ease;
        }
        
        .card:hover {
            transform: translateY(-5px);
        }
        
        .card h2 {
            color: #58a6ff;
            margin-bottom: 15px;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .card-content {
            min-height: 120px;
        }
        
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            background: #58a6ff;
            color: #0d1117;
            border-radius: 50%;
            font-weight: bold;
            margin-right: 10px;
        }
        
        .activity-tracker {
            background: #21262d;
            border-radius: 10px;
            padding: 25px;
            margin-bottom: 40px;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }
        
        .activity-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }
        
        .activity-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(30px, 1fr));
            gap: 5px;
        }
        
        .activity-day {
            width: 30px;
            height: 30px;
            border-radius: 5px;
            background: #161b22;
            transition: background 0.3s ease;
        }
        
        .activity-day.active {
            background: #238636;
        }
        
        .activity-day.low {
            background: #0e4429;
        }
        
        .activity-day.medium {
            background: #006d32;
        }
        
        .activity-day.high {
            background: #238636;
        }
        
        .script-example {
            background: #161b22;
            border-radius: 10px;
            padding: 20px;
            margin-top: 20px;
            overflow-x: auto;
        }
        
        pre {
            color: #c9d1d9;
            font-family: 'Consolas', monospace;
            line-height: 1.5;
        }
        
        .code-comment {
            color: #8b949e;
        }
        
        .code-keyword {
            color: #ff7b72;
        }
        
        .code-function {
            color: #d2a8ff;
        }
        
        .code-string {
            color: #a5d6ff;
        }
        
        .code-variable {
            color: #ffa657;
        }
        
        footer {
            text-align: center;
            margin-top: 40px;
            color: #8b949e;
            font-size: 0.9rem;
        }
        
        @media (max-width: 768px) {
            .cards {
                grid-template-columns: 1fr;
            }
            
            h1 {
                font-size: 2rem;
            }
        }
   