/* ============================================================
           CSS VARIABLES & BASE
        ============================================================ */
        :root {
            --green-600:  #16a34a;
            --green-700:  #15803d;
            --green-800:  #166534;
            --green-50:   #f0fdf4;
            --green-100:  #dcfce7;
            --text-dark:  #111827;
            --text-muted: #6b7280;
            --white:      #ffffff;
            --shadow-nav: 0 2px 20px rgba(0,0,0,0.10);
            --shadow-card:0 4px 24px rgba(0,0,0,0.08);
            --radius:     12px;
            --transition: 0.25s ease;
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Poppins', sans-serif;
            color: var(--text-dark);
            background: var(--white);
            -webkit-font-smoothing: antialiased;
        }

        /* ============================================================
           NAVBAR
        ============================================================ */
        #mainNav {
            background: var(--white);
            box-shadow: var(--shadow-nav);
            padding: 0;
            top: 0;
            z-index: 1030;
            transition: box-shadow var(--transition);
        }
        #mainNav.scrolled { box-shadow: 0 4px 30px rgba(0,0,0,0.14); }

        .navbar-inner {
            display: flex;
            align-items: center;
            width: 100%;
            padding: 14px 0;
        }

        /* ── Logo ── */
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }

        /* SVG sun badge */
        .brand-sun-wrap {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, #16a34a 0%, #22c55e 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 3px 10px rgba(22,163,74,0.40);
        }

        .brand-text {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.3px;
            line-height: 1;
        }
        .brand-text span { color: var(--green-600); }

        /* Nav links */
        .navbar-nav .nav-link {
            font-size: 0.92rem;
            font-weight: 500;
            color: #374151;
            padding: 8px 14px !important;
            border-radius: 8px;
            transition: color var(--transition), background var(--transition);
            position: relative;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--green-600);
            background: var(--green-50);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            display: block;
            height: 2px;
            width: 60%;
            background: var(--green-600);
            border-radius: 2px;
            margin: 2px auto 0;
        }

        /* CTA button */
        .btn-nav-cta {
            background: var(--green-600);
            color: var(--white) !important;
            font-weight: 600;
            font-size: 0.88rem;
            padding: 9px 20px !important;
            border-radius: 50px !important;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 2px 10px rgba(22,163,74,0.30);
        }
        .btn-nav-cta:hover {
            background: var(--green-700) !important;
            color: var(--white) !important;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(22,163,74,0.40);
        }
        .btn-nav-cta.active::after { display: none !important; }

        /* Toggler */
        .navbar-toggler { border: 1.5px solid #d1d5db; border-radius: 8px; padding: 6px 10px; }
        .navbar-toggler:focus { box-shadow: none; }

        /* Mobile menu */
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: var(--white);
                border-top: 1px solid #f3f4f6;
                padding: 16px 0 8px;
                margin-top: 8px;
                border-radius: 0 0 var(--radius) var(--radius);
                box-shadow: 0 8px 24px rgba(0,0,0,0.08);
            }
            .navbar-nav .nav-link {
                padding: 10px 16px !important;
                border-radius: 0;
                border-left: 3px solid transparent;
            }
            .navbar-nav .nav-link.active,
            .navbar-nav .nav-link:hover {
                border-left-color: var(--green-600);
                background: var(--green-50);
            }
            .navbar-nav .nav-link.active::after { display: none; }
            .btn-nav-cta {
                margin: 8px 16px 4px;
                display: block;
                text-align: center;
                border-radius: 50px !important;
            }
        }

        /* ============================================================
           MAIN
        ============================================================ */
        main { min-height: 60vh; }

        /* ============================================================
           FOOTER
        ============================================================ */
        .site-footer { background: #0f172a; color: #e2e8f0; padding: 60px 0 0; }

        .footer-brand-text {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--white);
            letter-spacing: -0.3px;
        }
        .footer-brand-text span { color: #4ade80; }

        .footer-tagline {
            color: #94a3b8;
            font-size: 0.88rem;
            line-height: 1.7;
            margin-top: 10px;
        }

        .footer-heading {
            font-size: 0.80rem;
            font-weight: 700;
            letter-spacing: 1.2px;
            text-transform: uppercase;
            color: #94a3b8;
            margin-bottom: 16px;
        }

        .footer-links { list-style: none; padding: 0; margin: 0; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            font-size: 0.90rem;
            transition: color var(--transition), padding-left var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-links a:hover { color: #4ade80; padding-left: 4px; }
        .footer-links a::before { content: '›'; color: var(--green-600); font-weight: 700; }

        .footer-contact-item {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            margin-bottom: 14px;
            font-size: 0.90rem;
            color: #cbd5e1;
        }
        .footer-contact-item i { color: #4ade80; font-size: 1rem; margin-top: 2px; flex-shrink: 0; }
        .footer-contact-item a { color: #cbd5e1; text-decoration: none; transition: color var(--transition); }
        .footer-contact-item a:hover { color: #4ade80; }

        .footer-social { display: flex; gap: 10px; margin-top: 18px; }
        .social-icon {
            width: 38px; height: 38px; border-radius: 50%;
            background: rgba(255,255,255,0.07);
            border: 1px solid rgba(255,255,255,0.12);
            display: flex; align-items: center; justify-content: center;
            color: #cbd5e1; font-size: 0.95rem; text-decoration: none;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .social-icon:hover {
            background: var(--green-600); color: var(--white);
            border-color: var(--green-600); transform: translateY(-2px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.07);
            padding: 20px 0;
            margin-top: 48px;
        }
        .footer-bottom p { font-size: 0.83rem; color: #64748b; margin: 0; }
        .footer-bottom a { color: #4ade80; text-decoration: none; }

        .badge-cert {
            background: rgba(22,163,74,0.15);
            color: #4ade80;
            border: 1px solid rgba(22,163,74,0.30);
            font-size: 0.72rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 50px;
        }

        /* ============================================================
           WHATSAPP FLOATING BUTTON
        ============================================================ */
        .whatsapp-fab {
            position: fixed; bottom: 28px; right: 28px;
            width: 58px; height: 58px;
            background: #25d366; border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            box-shadow: 0 4px 20px rgba(37,211,102,0.50);
            z-index: 9999; text-decoration: none;
            transition: transform 0.25s ease, box-shadow 0.25s ease;
            animation: wa-pulse 2.5s infinite;
        }
        .whatsapp-fab:hover {
            transform: scale(1.10);
            box-shadow: 0 6px 28px rgba(37,211,102,0.65);
            animation: none;
        }
        .whatsapp-fab svg { display: block; }
        .whatsapp-fab::before {
            content: 'Chat with us';
            position: absolute; right: 68px;
            background: #1f2937; color: var(--white);
            font-family: 'Poppins', sans-serif;
            font-size: 0.78rem; font-weight: 500;
            padding: 6px 12px; border-radius: 8px;
            white-space: nowrap; opacity: 0; pointer-events: none;
            transition: opacity 0.2s ease;
        }
        .whatsapp-fab:hover::before { opacity: 1; }
        @keyframes wa-pulse {
            0%   { box-shadow: 0 4px 20px rgba(37,211,102,0.50); }
            50%  { box-shadow: 0 4px 28px rgba(37,211,102,0.80), 0 0 0 10px rgba(37,211,102,0.12); }
            100% { box-shadow: 0 4px 20px rgba(37,211,102,0.50); }
        }

        /* ============================================================
           UTILITIES
        ============================================================ */
        .text-green { color: var(--green-600) !important; }
        .bg-green   { background: var(--green-600) !important; }