:root {
            --bg-main: #f5f7fa;
            --bg-card: #ffffff;
            --bg-header: #0099ff;
            --text-main: #1f2937;
            --text-muted: #6b7280;
            --border: #e5e7eb;
            --accent: #111111;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: Arial, Helvetica, sans-serif;
            background: var(--bg-main);
            color: var(--text-main);
            line-height: 1.6;
        }

        /* =========================
           LAYOUT
        ========================= */

        .container {
            max-width: 1100px;
            margin: auto;
            padding: 20px 20px;
        }

        .card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 40px;
            margin-bottom: 20px;
        }

        /* =========================
           HEADER
        ========================= */

        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-header);
            color: #ffffff;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .header-inner {
            max-width: 1100px;
            margin: auto;
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: bold;
            font-size: 18px;
        }

        .logo-placeholder {
            width: 36px;
            height: 36px;
            border-radius: 6px;
            background: rgba(255,255,255,0.15);
            display: inline-block;
        }

        nav {
            display: flex;
            gap: 20px;
        }

        nav a {
            color: #e5e7eb;
            text-decoration: none;
            font-size: 14px;
        }

        nav a:hover {
            color: #ffffff;
        }

        /* =========================
           HAMBURGER
        ========================= */

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #ffffff;
            font-size: 22px;
            cursor: pointer;
        }

        @media (max-width: 768px) {
            nav {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-header);
                flex-direction: column;
                padding: 20px;
                display: none;
            }

            nav.open {
                display: flex;
            }

            .menu-toggle {
                display: block;
            }
        }

        /* =========================
           HERO
        ========================= */

        .hero h1 {
            font-size: 38px;
            margin-bottom: 16px;
        }

        .hero p {
            font-size: 18px;
            max-width: 700px;
            color: var(--text-muted);
        }

        .cta {
            margin-top: 30px;
        }

        .cta a {
            display: inline-block;
            padding: 14px 26px;
            margin-right: 12px;
            border-radius: 6px;
            text-decoration: none;
            font-size: 15px;
        }

        .cta-primary {
            /* background: var(--accent); */
            background: #0099ff;
            color: #ffffff;
        }

        .cta-secondary {
            border: 1px solid var(--accent);
            color: var(--accent);
        }

        /* =========================
           CONTENT
        ========================= */

        h2 {
            font-size: 28px;
            margin-bottom: 20px;
        }

        ul {
            padding-left: 20px;
        }

        .steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .step {
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 20px;
            background: #fafafa;
        }

        .note {
            font-size: 14px;
            color: var(--text-muted);
            max-width: 800px;
        }

        /* =========================
           FOOTER
        ========================= */

        footer {
            background: var(--bg-header);
            color: #ffffff;
            padding: 5px 5px;
            text-align: center;
        }

        footer a {
            color: #ffffff;
            text-decoration: none;
            margin-right: 15px;
            font-size: 14px;
        }

        footer a:hover {
            color: #ffffff;
        }