body {
            font-family: 'Segoe UI', Roboto, system-ui, sans-serif;
            scroll-behavior: smooth;
        }

        /* colour theme: green, blue, white, orange */
        :root {
            --primary-green: #2e7d32;
            --primary-blue: #0d47a1;
            --primary-orange: #ef6c00;
            --light-bg: #f8faff;
        }

        .bg-green {
            background-color: var(--primary-green);
        }

        .bg-blue {
            background-color: var(--primary-blue);
        }

        .bg-orange {
            background-color: var(--primary-orange);
        }

        .text-green {
            color: var(--primary-green);
        }

        .text-blue {
            color: var(--primary-blue);
        }

        .text-orange {
            color: var(--primary-orange);
        }

        .btn-green {
            background-color: var(--primary-green);
            color: #fff;
            border: none;
        }

        .btn-green:hover {
            background-color: #1b5e20;
            color: #fff;
        }

        .btn-orange {
            background-color: var(--primary-orange);
            color: #fff;
            border: none;
        }

        .btn-orange:hover {
            background-color: #bf360c;
            color: #fff;
        }

        .btn-outline-orange {
            border: 2px solid var(--primary-orange);
            color: var(--primary-orange);
        }

        .btn-outline-orange:hover {
            background-color: var(--primary-orange);
            color: #fff;
        }

        .top-header {
            background: #0a2a3a;
            color: #f0f0f0;
            font-size: 0.9rem;
            padding: 6px 0;
        }

        .top-header a {
            color: #f0f0f0;
            text-decoration: none;
            margin: 0 8px;
        }

        .top-header a:hover {
            color: #ffb300;
        }

        .navbar {
            background: #ffffff;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
            transition: 0.3s;
        }

        .navbar.sticky-top {
            background: rgba(255, 255, 255, 0.97);
        }

        .navbar-brand {
            font-weight: 700;
            color: var(--primary-green);
            letter-spacing: -0.5px;
        }

        .navbar-brand span {
            color: var(--primary-orange);
        }

        .nav-link {
            font-weight: 600;
            color: #1a2a3a !important;
            margin: 0 6px;
        }

        .nav-link:hover {
            color: var(--primary-green) !important;
        }

        .hero-slider .carousel-item {
            height: 88vh;
            min-height: 400px;
            background-size: cover;
            background-position: center;
        }

        .hero-slider .carousel-item::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0, 20, 30, 0.5);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            color: #fff;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
        }

        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 700;
        }

        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 2.2rem;
            }
        }
        /* section */
        section{
            overflow: hidden;
        }

        .section-title {
            position: relative;
            margin-bottom: 2.5rem;
            font-weight: 700;
            color: #0a2a3a;
        }

        .section-title:after {
            content: '';
            display: block;
            width: 70px;
            height: 4px;
            background: var(--primary-orange);
            margin: 12px auto 0;
        }

        .service-card {
            background: #fff;
            border-radius: 20px;
            padding: 2rem 1rem;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            height: 100%;
            border-bottom: 4px solid var(--primary-green);
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.08);
        }

        .service-card i {
            font-size: 3rem;
            color: var(--primary-orange);
            margin-bottom: 1rem;
        }

        .feature-box {
            background: #fff;
            padding: 2rem 1rem;
            border-radius: 20px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.04);
            transition: 0.3s;
            height: 100%;
            border-left: 6px solid var(--primary-blue);
        }

        .feature-box:hover {
            transform: scale(1.02);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
        }

        .feature-box i {
            font-size: 2.8rem;
            color: var(--primary-green);
        }

        .counter-box {
            background: #fff;
            padding: 1.8rem;
            border-radius: 30px;
            box-shadow: 0 6px 18px rgba(0, 0, 0, 0.04);
        }

        .counter-box h3 {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--primary-blue);
        }

        .process-step {
            background: #fff;
            padding: 2rem 1rem;
            border-radius: 40px 40px 40px 0;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
            transition: 0.3s;
            border-bottom: 6px solid var(--primary-orange);
        }

        .process-step:hover {
            transform: translateY(-6px);
        }

        .process-step i {
            font-size: 3.5rem;
            color: var(--primary-green);
        }

        .gallery-img {
            position: relative;
            overflow: hidden;
            border-radius: 20px;
            cursor: pointer;
        }

        .gallery-img img {
            transition: 0.5s;
            width: 100%;
            height: 220px;
            object-fit: cover;
        }

        .gallery-img:hover img {
            transform: scale(1.08);
        }

        .gallery-img .overlay {
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.25);
            opacity: 0;
            transition: 0.3s;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 2rem;
        }

        .gallery-img:hover .overlay {
            opacity: 1;
        }

        .testimonial-card {
            background: #fff;
            border-radius: 30px;
            padding: 1.8rem;
            box-shadow: 0 6px 18px rgba(0, 0, 0, 0.04);
            height: 100%;
        }

        .testimonial-card i.fa-star {
            color: #ffb300;
        }

        .testimonial-card img {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            object-fit: cover;
        }

        .cta-section {
            background: linear-gradient(rgba(13, 71, 161, 0.8), rgba(0, 40, 20, 0.8)), url('https://images.unsplash.com/photo-1532996122724-e3c354a0b15b?w=1200&auto=format&fit=crop') center/cover fixed;
            padding: 4rem 0;
            color: #fff;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--primary-green);
            color: #fff;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: none;
        }

        .contact-info {
            background: #fff;
            padding: 2rem;
            border-radius: 30px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.04);
        }

        .contact-form {
            background: #fff;
            padding: 2rem;
            border-radius: 30px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.04);
        }

        .footer {
            background: #0a1f2a;
            color: #d0dce4;
        }

        .footer a {
            color: #b0c8d6;
            text-decoration: none;
        }

        .footer a:hover {
            color: #ffb300;
        }

        .floating-btn {
            position: fixed;
            bottom: 28px;
            right: 28px;
            z-index: 1030;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: #25D366;
            color: #fff;
            font-size: 2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
            transition: 0.2s;
        }

        .floating-btn:hover {
            transform: scale(1.08);
            color: #fff;
        }

        .floating-btn.call {
            background: #0d47a1;
            bottom: 100px;
        }

        .scroll-top {
            position: fixed;
            bottom: 170px;
            right: 28px;
            z-index: 1030;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary-orange);
            color: #fff;
            border: none;
            font-size: 1.6rem;
            display: none;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }

        .scroll-top.show {
            display: flex;
        }

        @media (max-width: 576px) {
            .hero-slider .carousel-item {
                height: 70vh;
            }

            .floating-btn {
                width: 50px;
                height: 50px;
                font-size: 1.6rem;
                bottom: 18px;
                right: 18px;
            }

            .floating-btn.call {
                bottom: 80px;
            }

            .scroll-top {
                bottom: 140px;
                right: 18px;
                width: 44px;
                height: 44px;
            }
        }