* {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            font-family: Arial, Helvetica, sans-serif;
            background: #0f172a;
            color: #e5e7eb;
        }

        .container {
            width: min(1100px, 92%);
            margin: 0 auto;
        }

        /* =========================
           Header
           ========================= */

        header {
            padding: 34px 0 26px;
            border-bottom: 1px solid #263247;
        }

        .brand {
            font-size: 20px;
            font-weight: 700;
            color: #ff6f91;
            margin-bottom: 18px;
        }

        h1 {
            margin: 0 0 10px;
            font-size: clamp(30px, 4vw, 44px);
            color: #ffffff;
        }

        .subtitle {
            margin: 0;
            color: #aeb8c8;
            font-size: 17px;
            line-height: 1.6;
            max-width: 800px;
        }

        /* =========================
           Main
           ========================= */

        main {
            padding: 42px 0 55px;
        }

        .intro {
            margin-bottom: 34px;
        }

        .intro h2 {
            margin: 0 0 10px;
            color: #ffffff;
            font-size: 25px;
        }

        .intro p {
            margin: 0;
            color: #aeb8c8;
            line-height: 1.7;
            max-width: 850px;
        }

        /* =========================
           IDE Demo Card
           ========================= */

        .demo-card {
            background: #151f33;
            border: 1px solid #29364d;
            border-radius: 16px;
            padding: 24px;
            margin-bottom: 28px;
            box-shadow: 0 15px 45px rgba(0, 0, 0, 0.20);
        }

        .demo-header {
            margin-bottom: 20px;
        }

        .demo-header h2 {
            margin: 0 0 8px;
            color: #ffffff;
            font-size: 26px;
        }

        .demo-header p {
            margin: 0;
            color: #aeb8c8;
            line-height: 1.6;
        }

        /* =========================
           Video
           ========================= */

        .video-wrapper {
            background: #080c14;
            border: 1px solid #29364d;
            border-radius: 12px;
            padding: 10px;
        }

        video {
            display: block;
            width: 100%;
            height: auto;
            border-radius: 8px;
            background: #000000;
        }

        /* =========================
           Details
           ========================= */

        .details {
            margin-top: 22px;
            padding-top: 20px;
            border-top: 1px solid #29364d;
        }

        .details h3 {
            margin: 0 0 10px;
            color: #ffffff;
            font-size: 18px;
        }

        .details p {
            margin: 0;
            color: #b8c2d2;
            line-height: 1.7;
        }

        /* =========================
           Fulfillment
           ========================= */

        .fulfillment {
            margin-top: 34px;
            background: #151f33;
            border: 1px solid #29364d;
            border-radius: 16px;
            padding: 26px;
        }

        .fulfillment h2 {
            margin: 0 0 12px;
            color: #ffffff;
            font-size: 23px;
        }

        .fulfillment p {
            margin: 0;
            color: #b8c2d2;
            line-height: 1.7;
        }

        /* =========================
           Buttons
           ========================= */

        .actions {
            margin-top: 28px;
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .button {
            display: inline-block;
            padding: 12px 20px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            transition: 0.2s ease;
        }

        .primary {
            background: #ff6f91;
            color: #ffffff;
        }

        .primary:hover {
            background: #ff819e;
        }

        .secondary {
            border: 1px solid #44516a;
            color: #e5e7eb;
        }

        .secondary:hover {
            background: #1b2940;
        }

        /* =========================
           Footer
           ========================= */

        footer {
            border-top: 1px solid #263247;
            padding: 24px 0 32px;
            color: #8995a8;
            font-size: 14px;
        }

        footer a {
            color: #ff8ba5;
            text-decoration: none;
        }

        footer a:hover {
            text-decoration: underline;
        }

        /* =========================
           Responsive
           ========================= */

        @media (max-width: 700px) {

            header {
                padding-top: 26px;
            }

            main {
                padding-top: 30px;
            }

            .demo-card {
                padding: 16px;
            }

            .fulfillment {
                padding: 20px;
            }

            .actions {
                flex-direction: column;
            }

            .button {
                text-align: center;
                width: 100%;
            }
        }