:root {
            --primary-color: #667eea;
            --secondary-color: #764ba2;
            --text-dark: #2c3e50;
            --text-light: #666;
            --bg-light: #f8f9fa;
            --white: #ffffff;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            background: var(--white);
            overflow-x: hidden;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: rgba(255, 255, 255, 0.98);
            padding: 14px 0;
            box-shadow: 0 2px 20px rgba(0,0,0,0.06);
        }
        .logo {
            font-size: 22px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .lang-btn {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            border: none;
            padding: 10px 16px;
            border-radius: 10px;
            cursor: pointer;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        main {
            padding: 48px 0 80px;
        }
        .hero {
            padding: 28px 0 18px;
        }
        .hero h1 {
            font-size: 36px;
            letter-spacing: -0.02em;
        }
        .hero p {
            color: var(--text-light);
            margin-top: 8px;
            max-width: 720px;
        }
        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 16px;
            margin-top: 22px;
        }
        .card {
            display: block;
            text-decoration: none;
            color: inherit;
            background: rgba(17,24,39,0.03);
            border: 1px solid rgba(17,24,39,0.06);
            border-radius: 16px;
            padding: 16px;
            transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
        }
        .card:hover {
            transform: translateY(-2px);
            border-color: rgba(102,126,234,0.25);
            box-shadow: 0 16px 36px rgba(0,0,0,0.10);
        }
        .card-title {
            font-weight: 800;
        }
        .card-desc {
            color: var(--text-light);
            margin-top: 6px;
            font-size: 14px;
        }