body {
            margin: 0;
            font-family: Arial, sans-serif;
            background: #0f0f0f;
            color: #f2f2f2;
            line-height: 1.6;
        }

        /* Logo container */
        .logo {
            width: 30vw;
            margin: 20px auto 0 auto;
            display: block;
        }

        header {
            padding: 20px 20px 20px 20px;
            text-align: center;
            background: linear-gradient(135deg, #1a1a1a, #2a2a2a);
        }

        .video-container {
            margin: 20px auto;
            max-width: 960px;
        }

        .video-container video {
            display: block;
            width: 100%;
            height: auto;
        }

        h1 {
            font-size: 42px;
            margin-bottom: 10px;
        }

        h2 {
            font-size: 28px;
            margin-bottom: 10px;
        }

        p {
            max-width: 700px;
            margin: 0 auto 20px auto;
            font-size: 18px;
        }

        .cta-btn {
            display: inline-block;
            padding: 14px 28px;
            background: #4CAF50;
            color: #fff;
            font-size: 20px;
            border-radius: 6px;
            text-decoration: none;
            margin-top: 20px;
        }

        .section {
            padding: 20px 20px;
            text-align: center;
            border-bottom: 1px solid #222;
        }

        .features {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 30px;
            margin-top: 40px;
        }

        .feature-box {
            background: #1c1c1c;
            padding: 25px;
            border-radius: 8px;
            width: 280px;
            text-align: left;
        }

        .feature-box h3 {
            margin-top: 0;
            font-size: 22px;
            margin-bottom: 10px;
        }

        ul {
            list-style: none;
            padding: 0;
            max-width: 600px;
            margin: 0 auto;
        }

        ul li {
            background: #1c1c1c;
            padding: 12px;
            margin: 8px 0;
            border-radius: 6px;
            font-size: 18px;
        }

        footer {
            padding: 30px;
            text-align: center;
            font-size: 14px;
            color: #aaa;
        }

        a {
            color: #4CAF50;
        }

        @media (max-width: 768px) {
            html,
            body {
                overflow-x: hidden;
            }

            header {
                padding: 0 0 20px 0;
            }

            header h1,
            header p,
            .section,
            footer {
                padding-left: 14px;
                padding-right: 14px;
            }

            .video-container {
                width: 100vw;
                margin: 0 calc(50% - 50vw) 14px;
                max-width: none;
            }

            .video-container video {
                width: 100%;
                max-width: 100%;
                border-radius: 0;
            }

            h1 {
                font-size: 30px;
                line-height: 1.2;
                margin: 10px auto 8px;
            }

            h2 {
                font-size: 22px;
                line-height: 1.25;
                margin: 0 auto 8px;
            }

            p,
            ul li {
                font-size: 17px;
            }

            p {
                margin-bottom: 14px;
            }

            .section {
                padding-top: 16px;
                padding-bottom: 16px;
            }

            ul {
                margin: 0 auto 12px;
            }

            ul li {
                padding: 10px;
                margin: 6px 0;
            }

            .cta-btn {
                font-size: 16px;
                padding: 12px 20px;
                margin-top: 10px;
            }

            .features {
                flex-direction: column;
                gap: 12px;
                align-items: center;
                margin-top: 18px;
            }

            .feature-box {
                width: 100%;
                max-width: 460px;
                text-align: center;
                padding: 18px;
            }

            footer {
                padding-top: 18px;
                padding-bottom: 22px;
            }
        }