:root {
            --blue-deep: #052a83;
            /* deep navy from logo */
            --blue-mid: #053f93;
            /* mid blue */
            --teal: #0b6f8e;
            /* logo teal */
            --accent: #0076b6;
            --muted: #6b7280;
            --bg: #ffffff;
            --card: #f7fbff;
            --radius: 12px;
            font-family: Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
            color: var(--blue-deep);
        }

        * {
            box-sizing: border-box
        }

        body {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 18px;
            background: linear-gradient(180deg, #fbfdff 0%, #ffffff 100%);
            color: var(--blue-deep);
            line-height: 1.45;
        }

        header {
            display: flex;
            position: sticky;
            top: 0;
            align-items: center;
            justify-content: space-between;
            padding: 22px 28px;
            background-image: url("../img/banner.png");
            background-size: cover;

        }

        .brand {
            display: flex;
            align-items: center;
            gap: 14px
        }

        .brand img {
            max-height: 72px;
            width: auto;
            height: auto;
            display: block;
        }

        nav {
            display: flex;
            gap: 18px;
            align-items: center;
        }

        /* mobile nav toggle button */
        .nav-toggle {
            display: none;
            background: transparent;
            border: 0;
            color: var(--blue-deep);
            padding: 8px;
            border-radius: 8px;
            cursor: pointer;
        }

        .nav-toggle svg { display:block }

/* off-canvas nav + backdrop */
.nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.36);
    z-index: 50;
    opacity: 0;
    transition: opacity .28s ease;
    pointer-events: none;
}
.nav-backdrop.visible { opacity: 1; pointer-events: auto }

/* prevent body scroll while nav open */
body.nav-open { overflow: hidden }

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

        /* Visual feedback for header links */
        nav a {
            transition: color .18s ease, background-color .18s ease, transform .12s ease;
            padding: 6px 8px;
            border-radius: 8px;
        }

        nav a:hover {
            color: var(--accent);
            background: rgba(0,118,182,0.06);
            transform: translateY(-1px);
        }

        nav a:active {
            transform: translateY(0);
            opacity: .95;
        }

        /* Accessible focus state */
        nav a:focus-visible {
            outline: none;
            box-shadow: 0 0 0 4px rgba(0,118,182,0.12);
            background: rgba(0,118,182,0.04);
        }

        /* Emphasise CTA link slightly more */
        nav a.cta {
            padding: 10px 14px;
            border-radius: 10px;
        }

        nav a.cta:hover {
            filter: brightness(.98);
            box-shadow: 0 6px 18px rgba(3,80,140,0.08);
        }

        .hero {
            display: grid;
            grid-template-columns: 1fr 460px;
            gap: 36px;
            padding: 48px 28px;
            align-items: center
        }

        .hero h1 {
            font-size: 32px;
            margin: 0 0 12px
        }

        .lead {
            color: var(--muted);
            margin-bottom: 18px
        }

        .cta {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 12px 18px;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 700
        }

        .sub-cta {
            background: transparent;
            border: 2px solid var(--accent);
            color: var(--accent);
            padding: 10px 16px;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 700;
            margin-left: 12px
        }

        /* Visual feedback for hero action buttons */
        .cta, .sub-cta {
            transition: transform .12s ease, box-shadow .18s ease, background-color .18s ease, color .18s ease, opacity .12s ease;
            will-change: transform, opacity;
        }

        .cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 26px rgba(3,80,140,0.12);
            filter: brightness(.98);
        }

        .cta:active {
            transform: translateY(0);
            opacity: .96;
        }

        .cta:focus-visible {
            outline: none;
            box-shadow: 0 0 0 6px rgba(0,118,182,0.10);
        }

        .sub-cta:hover {
            background: rgba(0,118,182,0.06);
            transform: translateY(-2px);
        }

        .sub-cta:active {
            transform: translateY(0);
            opacity: .95;
        }

        .sub-cta:focus-visible {
            outline: none;
            box-shadow: 0 0 0 5px rgba(0,118,182,0.08);
            background: rgba(0,118,182,0.04);
        }

        /* hero actions layout */
        .hero-actions {
            display: inline-flex;
            gap: 12px;
            align-items: center;
            margin-top: 12px;
            flex-wrap: wrap;
        }

        /* small-screen stacking for hero CTAs */
        @media (max-width:480px) {
            .hero-actions {
                display: flex;
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
            }

            .hero-actions .cta,
            .hero-actions .sub-cta {
                width: 100%;
                margin-left: 0;
                text-align: center;
            }

            .hero-actions .cta { padding: 12px 16px }
            .hero-actions .sub-cta { padding: 10px 14px }
        }

        .cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 16px;
            margin-top: 24px
        }

        .card {
            background: var(--card);
            padding: 18px;
            border-radius: 12px;
            box-shadow: 0 6px 18px rgba(5, 42, 131, 0.06)
        }

        .card h3 {
            margin: 0 0 8px
        }

        section.products {
            padding: 44px 28px
        }

        .products-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px
        }

        .product-group {
            background: #fff;
            padding: 18px;
            border-radius: 12px;
            border: 1px solid rgba(5, 42, 131, 0.04)
        }

        .product-group h4 {
            margin: 0 0 8px;
            color: var(--blue-mid)
        }

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

        .feature {
            background: linear-gradient(180deg, #f3fbff, #fff);
            padding: 10px 12px;
            border-radius: 8px;
            border: 1px solid rgba(3, 80, 140, 0.06);
            font-size: 14px
        }

        .two-col {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 22px
        }

        /* Make contact section two-col equal-width columns */
        #contact .two-col {
            grid-template-columns: repeat(2, 1fr);
            align-items: stretch; /* ensure children stretch to equal height */
        }

        footer {
            background: linear-gradient(180deg, #f6fbff, #ffffff);
            padding: 28px;
            border-top: 1px solid rgba(3, 80, 140, 0.04)
        }

        .contact-form input,
        .contact-form textarea {
            width: 100%;
            padding: 10px;
            border-radius: 8px;
            border: 1px solid #dbeaf6;
            margin-top: 8px
        }

        .meta {
            font-size: 13px;
            color: var(--muted)
        }

        @media(max-width:880px) {
            .hero {
                grid-template-columns: 1fr;
            }
            /* enable mobile nav toggle */
            .nav-toggle { display: inline-block }

            /* off-canvas nav for small screens; keep header sticky */
            header { position: sticky; top: 0; z-index: 80 }
            header nav {
                position: fixed;
                top: 0;
                right: 0;
                height: 100vh;
                width: 84%;
                max-width: 360px;
                padding: 72px 20px 20px 20px; /* leave room for header */
                background: #fff;
                box-shadow: -18px 0 48px rgba(3,80,140,0.06);
                transform: translateX(100%);
                transition: transform .32s cubic-bezier(.2,.9,.2,1);
                display: flex;
                flex-direction: column;
                gap: 14px;
                z-index: 60;
            }

            /* show nav when activated */
            header.nav-open nav { transform: translateX(0) }

            /* ensure nav links look good in column */
            header nav a { padding: 10px 6px; display: block }

            /* backdrop sits under the nav but above page content */
            .nav-backdrop { z-index: 55 }

            /* prevent header content crowding */
            .two-col {
                grid-template-columns: 1fr
            }

            /* ensure contact section specifically stacks on small screens (overrides earlier ID-specific rule) */
            #contact .two-col {
                grid-template-columns: 1fr;
            }

            .products-grid {
                grid-template-columns: 1fr
            }

            header {
                padding: 14px
            }

            .brand img {
                height: 56px
            }

            .hero h1 { font-size: 24px }
        }

        /* simple utility classes */
        .pill {
            display: inline-block;
            padding: 6px 10px;
            border-radius: 999px;
            background: rgba(11, 111, 142, 0.08);
            color: var(--teal);
            font-weight: 700;
            font-size: 13px
        }

        .small {
            font-size: 13px;
            color: var(--muted)
        }

        .list {
            padding-left: 18px
        }