body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            line-height: 1.6;
            margin: 0;
            padding: 0;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: #e2e8f0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: rgba(15, 23, 42, 0.95);
            padding: 1rem 0;
            border-bottom: 1px solid #334155;
            backdrop-filter: blur(15px);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: bold;
            color: #f59e0b;
        }
        .hero {
            padding: 5rem 0;
            text-align: center;
            background: radial-gradient(circle at center, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23f59e0b" stroke-width="0.5" opacity="0.2"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
            opacity: 0.1;
        }
        h1 {
            font-size: 4rem;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #f59e0b, #d97706, #b45309);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            position: relative;
            z-index: 1;
        }
        .subtitle {
            font-size: 1.4rem;
            color: #94a3b8;
            margin-bottom: 2rem;
            max-width: 900px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
            z-index: 1;
        }
        .dp-badge {
            display: inline-block;
            background: linear-gradient(135deg, #f59e0b, #d97706);
            color: white;
            padding: 0.6rem 2rem;
            border-radius: 30px;
            font-weight: 600;
            margin-bottom: 2rem;
            font-size: 1.1rem;
            box-shadow: 0 10px 30px rgba(245, 158, 11, 0.3);
            position: relative;
            z-index: 1;
        }
        .code-demo {
            background: rgba(30, 41, 59, 0.6);
            padding: 4rem 0;
            margin: 4rem 0;
            border-radius: 20px;
            backdrop-filter: blur(10px);
        }
        .code-container {
            max-width: 1000px;
            margin: 0 auto;
            background: rgba(15, 23, 42, 0.8);
            border-radius: 12px;
            border: 1px solid #334155;
            overflow: hidden;
        }
        .code-header {
            background: rgba(15, 23, 42, 0.9);
            padding: 1rem;
            border-bottom: 1px solid #334155;
            display: flex;
            align-items: center;
        }
        .code-title {
            color: #e2e8f0;
            font-weight: 600;
            margin-left: 1rem;
        }
        .code-content {
            padding: 1.5rem;
            color: #e2e8f0;
        }
        .code-editor {
            background: #1a1a1a;
            border-radius: 8px;
            padding: 1.5rem;
            font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
            font-size: 0.9rem;
            line-height: 1.4;
            margin: 1rem 0;
            border: 1px solid #334155;
            overflow-x: auto;
        }
        .dp-table {
            background: #1a1a1a;
            border-radius: 8px;
            padding: 2rem;
            font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
            font-size: 0.85rem;
            line-height: 1.6;
            margin: 1rem 0;
            border: 1px solid #334155;
            overflow-x: auto;
            color: #f59e0b;
        }
        .code-line {
            display: block;
        }
        .js-comment { color: #6b7280; }
        .js-keyword { color: #f59e0b; }
        .js-string { color: #10b981; }
        .js-function { color: #60a5fa; }
        .js-variable { color: #a78bfa; }
        .js-number { color: #fb7185; }
        .ai-hint {
            background: rgba(245, 158, 11, 0.1);
            border-left: 4px solid #f59e0b;
            padding: 1rem;
            margin: 1rem 0;
            border-radius: 0 8px 8px 0;
            position: relative;
        }
        .ai-hint::before {
            content: '🤖 AI Coach';
            position: absolute;
            top: -10px;
            left: 10px;
            background: #0f172a;
            color: #f59e0b;
            font-size: 0.8rem;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
        }