:root {
            --primary: #2563eb;
            --dark: #1e293b;
            --light: #f8fafc;
            --text: #334155;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            line-height: 1.6;
            margin: 0;
            color: var(--text);
            background-color: var(--light);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        header {
            background: #fff;
            padding: 1rem 5%;
            border-bottom: 3px solid var(--primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-weight: bold;
            font-size: 1.5rem;
            color: var(--dark);
        }

        nav a {
            text-decoration: none;
            color: var(--primary);
            font-weight: 600;
        }

        main {
            flex: 1;
            padding: 4rem 5%;
            text-align: center;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }

        .hero-shape {
            width: 100px;
            height: 100px;
            background: linear-gradient(135deg, var(--primary), #60a5fa);
            border-radius: 20px;
            margin-bottom: 2rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        h1 {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 1rem;
        }

        footer {
            padding: 2rem 5%;
            background: var(--dark);
            color: #fff;
            text-align: center;
            font-size: 0.9rem;
        }

        @media (min-width: 768px) {
            main { padding: 8rem 5%; }
            h1 { font-size: 3.5rem; }
        }